ORCID Profile
0000-0001-8380-0692
Current Organisation
School of Earth Sciences and Engineering, Nanjing University
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Publisher: Springer Science and Business Media LLC
Date: 25-05-2021
Publisher: Elsevier BV
Date: 08-2018
Publisher: Elsevier BV
Date: 1994
Publisher: Cambridge University Press (CUP)
Date: 15-09-2017
DOI: 10.1017/JPA.2017.71
Abstract: South China has become the most important area to establish a global stratigraphic framework of the Wuchiapingian Stage because complete Wuchiapingian sequences include the GSSPs for the base and top of the stage. As the markers of the Wuchiapingian GSSP, conodonts are the most important fossil group to establish the Wuchiapingian biostratigraphic framework. However, few documents have investigated in detail the conodont biostratigraphic succession through the entire Wuchiapingian Stage. Furthermore, the conodont taxonomy of several Wuchiapingian Clarkina species is still debated. Therefore, we here review all Wuchiapingian Clarkina species from South China and figure ontogenetic growth series from juvenile to adult in iduals for each valid and important species in order to revise both Wuchiapingian conodont taxonomy and the biostratigraphic succession. Based on the Penglaitan, Dukou, and Nanjiang sections, seven conodont zones ( Clarkina postbitteri postbitteri , C . dukouensis , C . asymmetrica , C . leveni , C . guangyuanensis , C . transcaucasica , and C . orientalis ) are recognized. The Wuchiapingian Clarkina species lineage is also reviewed to confirm the conodont biostratigraphic framework. The Guadalupian-Lopingian boundary (GLB) interval represents a sequence boundary. The time framework of the pre-Lopingian extinction interval indicates that the beginning of the end-Guadalupian regression is in the upper part of the Jinogondolella postserrata Zone, and the beginning of the early Lopingian transgression is in the lower part of the Clarkina dukouensis Zone in South China.
Publisher: Elsevier BV
Date: 08-2010
Publisher: Geological Society of America
Date: 03-02-2017
DOI: 10.1130/G38644.1
Publisher: Geological Society of America
Date: 04-2009
DOI: 10.1130/G25477A.1
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 06-2020
Publisher: Elsevier BV
Date: 06-2020
Publisher: Springer Science and Business Media LLC
Date: 08-05-2023
DOI: 10.1038/S43247-023-00821-6
Abstract: The driving forces, kill and recovery mechanisms for the end-Permian mass extinction (EPME), the largest Phanerozoic biological crisis, are under debate. Sedimentary records of mercury enrichment and mercury isotopes have suggested the impact of volcanism on the EPME, yet the causes of mercury enrichment and isotope variations remain controversial. Here, we model mercury isotope variations across the EPME to quantitatively assess the effects of volcanism, terrestrial erosion and photic zone euxinia (PZE, toxic, sulfide-rich conditions). Our numerical model shows that while large-scale volcanism remains the main driver of widespread mercury enrichment, the negative shifts of Δ 199 Hg isotope signature across the EPME cannot be fully explained by volcanism or terrestrial erosion as proposed before, but require additional fractionation by marine mercury photoreduction under enhanced PZE conditions. Thus our model provides further evidence for widespread and prolonged PZE as a key kill mechanism for both the EPME and the impeded recovery afterward.
Publisher: Elsevier
Date: 2000
Publisher: Elsevier BV
Date: 2000
Publisher: Elsevier BV
Date: 12-2017
Publisher: Wiley
Date: 03-2010
DOI: 10.1002/GJ.1239
Publisher: Wiley
Date: 03-2010
DOI: 10.1002/GJ.1232
Abstract: The Lopingian represents the last epoch of the Palaeozoic Era and is bracketed by two severe biotic mass extinctions associated with dramatic environmental changes. The Lopingian Epoch lasted about 7 millions years and was also bracketed by large volcanic eruptions with the Emeishan volcanics at the base and the Siberian traps at the top. Considerable data have accumulated recently and in this paper we attempt to summarize these findings in a high‐resolution Lopingian (Late Permian) timescale that integrates currently available multiple biostratigraphic, isotope chemostratigraphic, geochronologic and magnetostratigraphic data. In South China at least 13 conodont zones, multiple polarity zones and large carbon isotope fluctuations in the Lopingian are recognized and provide the high‐resolution calibration that is essential to study this Late Permian interval characterized by Earth's largest biotic extinction. We also present a global correlation chart for the marine Lopingian Series. Copyright © 2010 John Wiley & Sons, Ltd.
Publisher: Geological Society of London
Date: 23-06-2022
Abstract: We present an updated look at Carboniferous brachiopod biozonation from most of the world framed into a revised Carboniferous palaeogeography, based on a selection of the literature published on Carboniferous brachiopods since the nineteenth century. The biostratigraphic significance of the most important brachiopod taxa is synthesized in seven geographical correlations. The Mississippian is characterized by rich brachiopod faunas, with widespread taxa with a good potential for global correlation, such as Rugosochonetes , Delepinea , Buxtonia , Antiquatonia , Spinocarinifera , Marginatia , Fluctuaria , Ovatia , Rhipidomella , Lamellosathyris , Unispirifer , Tylothyris and Syringothyris . From the mid-Visean to the late Serpukhovian, taxa of gigantoproductidines are biostratigraphically significant, and occur everywhere except South America and Australia, which remain as distinct faunal successions for most of the period. A major turnover occurs at the beginning of the Pennsylvanian, characterized by a higher degree of provincialism. Pennsylvanian brachiopod faunas are erse in China, Russia and North America, but otherwise they are less developed and are characterized mostly by endemic taxa, h ering long-distance correlation. An exception is the rapid ersification of taxa of the Choristitinae, which were widespread from the Bashkirian to the Moscovian, allowing long-distance correlation.
Publisher: Elsevier BV
Date: 05-2019
Publisher: Springer Singapore
Date: 2019
Publisher: Elsevier BV
Date: 10-2000
Publisher: Elsevier BV
Date: 04-2022
Publisher: Wiley
Date: 03-2010
DOI: 10.1002/GJ.1231
Abstract: Lopingian (Late Permian) conodonts and stratigraphy in northwest and central Iran have become hotly debated issues recently. We here use a s le‐population approach, to develop a high‐resolution conodont biostratigraphic framework for the Lopingian of Iran based on a re‐examination of collections studied by Sweet from the Kuh‐e‐Ali Bashi area, northwest Iran s les from the Abadeh C section and a nearby Permian‐Triassic boundary section in the Abadeh area and on published data. Six Wuchiapingian conodont zones, the Clarkina dukouensis, C. asymmetrica, C. leveni, C. guangyuanensis, C. transcaucasica and C. orientalis zones, and eight Changhsingian conodont zones, the Clarkina wangi, C. subcarinata, C. changxingensis, C. bachmanni, C. nodosa, C. yini, C. abadehensis and C. hauschkei zones, are described and figured. Diagnoses of ontogenetic characteristics to population variations of all the zone‐naming species are re‐described based on a s le‐population taxonomic concept. The high‐resolution Lopingian conodont zonation in Iran is closely correlative with its counterpart in South China. However, slightly different evolutionary trends in Clarkina populations existed at the very end of the Changhsingian in Iran and South China. This reflects a geographical cline and/or facies dependence and endemism in Clarkina populations rather than stratigraphic incompleteness of sections in either Iran or South China. Copyright © 2010 John Wiley & Sons, Ltd.
Publisher: Elsevier BV
Date: 04-2016
Publisher: Informa UK Limited
Date: 11-1996
Publisher: Elsevier BV
Date: 08-2000
Publisher: Elsevier BV
Date: 06-2019
Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 03-2022
Publisher: Springer Science and Business Media LLC
Date: 17-07-2018
Publisher: Schweizerbart
Date: 08-2013
Publisher: Elsevier BV
Date: 02-2015
Publisher: American Association for the Advancement of Science (AAAS)
Date: 09-12-2011
Abstract: High-precision geochronologic dating constrains probable causes of Earth's largest mass extinction.
Publisher: Wiley
Date: 05-02-2020
DOI: 10.1002/SPP2.1298
Publisher: Elsevier BV
Date: 07-2023
Publisher: Cambridge University Press (CUP)
Date: 03-2001
DOI: 10.1017/S0022336000018084
Abstract: A small fauna of 11 species belonging to 10 genera of Permian Brachiopoda from the lower part of the Qubuerga Formation outcropping near Shengmi village in the Qomolangma region of southern Xizang (Tibet) is figured and new taxa are described. New taxa are Quinquenella semiglobosa and Costatumulus shengmiensis. The fauna is most likely of Wuchiapingian (Djhulfian) age as indicated by the majority of the brachiopod species.
Publisher: Elsevier BV
Date: 07-2023
Publisher: Elsevier BV
Date: 02-2022
Publisher: International Union of Geological Sciences
Date: 09-2006
Publisher: Wiley
Date: 03-2010
DOI: 10.1002/GJ.1228
Abstract: A detailed examination has been made of the Lopingian (Late Permian) ammonoid succession across the Wuchiapingian/Changhsingian boundary of the northern Penglaitan Section in the Laibin area, South China. Five ammonoid interval zones were identified via bed‐by‐bed collection: the Prototoceras–Konglingites , Etoushanoceras–Jinjiangoceras , Shevyrevites , Penglaites and Pleuronodoceras–Rotodiscoceras zones, in ascending order. The lower three zones, located in the upper part of the Heshan Formation, are all of Wuchiapingian age in terms of the associated conodonts, whereas the Penglaites Zone, which crosses the lithologic boundary between the Heshan and Talung formations, and the uppermost zone in the lower part of the Talung Formation are of Changhsingian age. Ammonoid faunal turnover, from otoceratoid‐dominated to Xenodiscoid‐dominated faunas, occurred between the Etoushanoceras–Jinjiangoceras and Shevyrevites zones. This horizon is slightly lower than the Wuchiapingian/Changhsingian boundary, which is located between the Shevyrevites Zone and the Penglaites Zone of the northern Penglaitan Section in the Laibin area, South China. Copyright © 2010 John Wiley & Sons, Ltd.
Publisher: Oxford University Press (OUP)
Date: 06-10-2014
DOI: 10.1093/NSR/NWU047
Publisher: Geological Society of America
Date: 12-12-2018
DOI: 10.1130/G45461.1
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 10-2018
Publisher: Springer Science and Business Media LLC
Date: 28-11-2018
Publisher: Elsevier BV
Date: 03-2020
Publisher: Elsevier BV
Date: 08-2007
Publisher: Cambridge University Press (CUP)
Date: 09-2008
DOI: 10.1666/07-118.1
Abstract: The uppermost 5–15 m of the Douling Formation in the southern Hunan area, South China, yields a erse fauna comprised of ammonoids, bivalves, and brachiopods. The brachiopods reported in this paper consist of 51 species in 34 genera and are dominated by the Lopingian (Late Permian) species associated with a few species persisting from the underlying Maokouan (Late Guadalupian). This fauna is of earliest Wuchiapingian in age as precisely constrained by the associated conodont Clarkina postbitteri postbitteri and the Guadalupian-type ammonoid fauna of the Roadoceras-Doulingoceras Zone in the brachiopod horizon. The discovery of the Lopingian species-dominated brachiopod fauna in the earliest Wuchiapingian in southern Hunan suggests a much less pronounced effect of the pre-Lopingian crisis (end-Guadalupian mass extinction) than the end-Changhsingian mass extinction in terms of brachiopods, a contemporaneous onset of the Lopingian recovery/radiation during the pre-Lopingian crisis period, and taxonomic selectivity of the pre-Lopingian crisis in terms of different fossil groups. New taxa are Echinauris doulingensis n. sp., Pararigbyella quadrilobata n. gen. and n. sp. and P. doulingensis n. gen. and n. sp.
Publisher: Elsevier BV
Date: 07-2013
Publisher: Informa UK Limited
Date: 2001
Publisher: Elsevier BV
Date: 09-2014
Publisher: Elsevier BV
Date: 04-2022
Publisher: Wiley
Date: 22-02-2010
DOI: 10.1002/GJ.1220
Abstract: Data from five marine sections across the Permian‐Triassic boundary in southern China reveal a pattern of 13 C‐depleted carbonate ( δ 13 C carb ) in different facies spanning carbonate platform to lower slope. A gradual decrease of δ 13 C carb is evident in all sections and matched by an opposing change in 87 Sr/ 86 Sr from the Late Permian to the Induan (Early Triassic). These complementary trends in strontium and carbon isotope data imply an extended period of enhanced continental uplift and weathering of silicates and organic matter across the Permian‐Triassic event boundary (PTEB). A pronounced sharp drop of δ 13 C carb at the PTEB is most recognizable in the upper r environment of Meishan, occurs weakly in shallow water environments and cannot be discerned in the deepest water setting. We propose that this pattern reflects an enhancement of stratified‐ocean conditions in the immediate aftermath of the latest Permian transgression. The sharp drop in δ 13 C carb at the PTEB in the platform r environments likely resulted from the depth‐selective calcification of 13 C‐depleted dissolved inorganic carbon (DIC) formed by respiration of organic matter including, perhaps, methane. Indeed, massive volcanism at the PTEB would have enhanced eutrophication and stratification thereby slowing the mixing of 13 C‐depleted DIC into deeper‐water environments. Copyright © 2010 John Wiley & Sons, Ltd.
Publisher: Frontiers Media SA
Date: 04-03-2021
DOI: 10.3389/FEART.2021.615841
Abstract: Palaeo-wildfire, which had an important impact on the end Permian terrestrial ecosystems, became more intense in the latest Permian globally, evidenced by extensive occurrence of fossil charcoals. In this study, we report abundant charcoals from the upper part of the Xuanwei Formation and the Permian–Triassic transitional Kayitou Formation in the Lengqinggou section, western Guizhou Province, Southwest China. These charcoals are well-preserved with anatomical structures and can be classified into seven distinctive types according to their characteristics. Organic carbon isotopic analyses of both bulk rocks and charcoals show that the δ 13 C org values in the Kayitou Formation are notably more negative than those in the Xuanwei Formation, with a negative excursion of 4.08‰ immediately above the volcanic ash bed in the middle of the uppermost coal bed of the Xuanwei Formation. Charcoals with high reflectance values (Ro mean = 2.38%) are discovered below the ash bed. By contrast, the reflectance values (Ro mean = 1.51%) of the charcoals in the Kayitou Formation are much lower than those of the Xuanwei Formation, indicating the palaeo-wildfire types have changed from crown fires to surface fires, which was probably due to the retrogression of vegetation systems during the extinction. Based on the above evidence, we suppose that palaeo-wildfires became more frequent and more severe since the climate became drier during the latest Permian in Southwest China, and the eventual vegetation changeover of the terrestrial ecosystems in Southwest China could be caused by volcanism.
Publisher: Informa UK Limited
Date: 07-07-2016
Publisher: Elsevier BV
Date: 09-2022
Publisher: Elsevier BV
Date: 07-2013
Publisher: Elsevier BV
Date: 12-2002
Publisher: Springer Science and Business Media LLC
Date: 02-07-2015
Publisher: Elsevier BV
Date: 04-2017
Publisher: Geological Society of America
Date: 06-11-2015
DOI: 10.1130/G37284.1
Publisher: Cambridge University Press (CUP)
Date: 2009
DOI: 10.1666/08033.1
Abstract: The end-Guadalupian extinction, at the end of the Middle Permian, is thought to have been one of the largest biotic crises in the Phanerozoic. Previous estimates suggest that the crisis eliminated 58% of marine invertebrate genera during the Capitanian stage and that its selectivity helped the Modern evolutionary fauna become more erse than the Paleozoic fauna before the end-Permian mass extinction. However, a new s ling-standardized analysis of Permian ersity trends, based on 53731 marine invertebrate fossil occurrences from 9790 collections, indicates that the end-Guadalupian “extinction” was actually a prolonged but gradual decrease in ersity from the Wordian to the end of the Permian. There was no peak in extinction rates reduced genus richness exhibited by all studied invertebrate groups and ecological guilds, and in different latitudinal belts, was instead driven by a sharp decrease in origination rates during the Capitanian and Wuchiapingian. The global ersity decrease was exacerbated by changes in beta ersity, most notably a reduction in provinciality due to the loss of marine habitat area and a pronounced decrease in geographic disparity over small distances. Disparity over moderate to large distances was unchanged, suggesting that small-scale beta ersity changes may have resulted from compression of bathymetric ranges and homogenization of onshore-offshore faunal gradients stemming from the spread of deep-water anoxia around the Guadalupian/Lopingian boundary. Although tropical invertebrate genera were no more likely than extratropical ones to become extinct, the marked reduction in origination rates during the Capitanian and Wuchiapingian is consistent with the effects of global cooling (the Kamura Event), but may also be consistent with other environmental stresses such as anoxia. However, a gradual reduction in ersity, rather than a sharp end-Guadalupian extinction, precludes the need to invoke drastic extinction mechanisms and indicates that taxonomic loss at the end of the Paleozoic was concentrated in the traditional end-Permian (end-Changhsingian) extinction, which eliminated 78% of all marine invertebrate genera.
Publisher: Elsevier BV
Date: 09-2018
Publisher: Schweizerbart
Date: 28-06-2021
Publisher: Elsevier BV
Date: 11-2011
Publisher: Elsevier BV
Date: 11-2014
Publisher: Geological Society of America
Date: 19-09-2019
DOI: 10.1130/B31909.1
Publisher: Cambridge University Press (CUP)
Date: 05-2011
DOI: 10.1666/10-086.1
Abstract: Twelve brachiopod species are described from the Cisuralian (Early Permian) Kungurian horizon of a large limestone block in the Middle Jurassic accretionary complex at Hatahoko in the Mino Belt, central Japan. Most species of the Hatahoko fauna are known from the Kungurian to lowest Guadalupian (Middle Permian) of West Texas, U.S.A. The Kungurian age is also indicated by the associated conodonts in the same limestone block. The Hatahoko brachiopod fauna, as well as some other previously-reported Guadalupian brachiopod faunas, exhibits a very strong paleobiogeographical affinity with the faunas in West Texas, U.S.A. Therefore it can be interpreted as a fauna which inhabited reef-seamount complexes close to North America in the mid-equatorial region of the Panthalassa in the late Early Permian, rifted westwards thousands of kilometers, and finally accreted onto the Japanese Island when the Western Pacific Plate subducted beneath the Eurasian Plate during the Jurassic.
Publisher: Elsevier BV
Date: 03-2006
Publisher: Elsevier BV
Date: 2007
Publisher: Elsevier BV
Date: 2007
Publisher: Cambridge University Press (CUP)
Date: 2014
DOI: 10.1666/13022
Abstract: Studies of the end-Permian mass extinction have suggested a variety of patterns from a single catastrophic event to multiple phases. But most of these analyses have been based on fossil distributions from single localities. Although single sections may simplify the interpretation of species ersity, they are susceptible to bias from stratigraphic incompleteness and facies control of preservation. Here we use a data set of 1450 species from 18 fossiliferous sections in different paleoenvironmental settings across South China and the northern peri-Gondwanan region, and integrate it with high-precision geochronologic data to evaluate the rapidity of the largest Phanerozoic mass extinction. To reduce the Signor-Lipps effect, we applied constrained optimization (CONOP) to search for an optimal sequence of first and last occurrence datums for all species and generate a composite bio ersity pattern based on multiple sections. This analysis indicates that an abrupt extinction of 62% of species took place within 200 Kyr. The onset of the sudden extinction is around 252.3 Ma, just below Bed 25 at the Meishan section. Taxon turnover and ersification rates suggest a deterioration of the living conditions nearly 1.2 Myr before the sudden extinction. The magnitude of the extinction was such that there was no immediate biotic recovery. Prior suggestions of highly variable, multi-phased extinction patterns reflect the impact of the Signor-Lipps effect and facies-dependent occurrences, and are not supported following appropriate statistical treatment of this larger data set.
Publisher: Elsevier BV
Date: 2007
Publisher: Geological Society of America
Date: 16-07-2019
DOI: 10.1130/B31996.1
Abstract: We present a new, biostratigraphically calibrated organic and inorganic C-isotope record spanning the basal Late Permian to earliest Triassic from southern Guizhou (Nanpanjiang basin, South China). After fluctuations of a likely diagenetic overprint are removed, three negative carbon isotope excursions (CIEs) persist. These include a short-lived CIE during the early Wuchiapingian, a protracted CIE ending shortly after the Wuchiapingian–Changhsingian Boundary, and a third CIE straddling the Permian–Triassic boundary. Comparison of our new C-isotope record with others from the same basin suggests that influences of local bathymetry and of the amount of buried terrestrial organic matter are of importance. Comparison with other coeval time series outside of South China also highlights that only the negative CIE at the Permian–Triassic boundary is a global signal. These differences can be explained by the different volumes of erupted basalts between the Late Permian Emeishan and the younger Siberian large igneous provinces and their distinct eruptive modalities. Emeishan volcanism was largely submarine, implying that sea water was an efficient buffer against atmospheric propagation of volatiles. The equatorial position of Emeishan was also an additional obstacle for volatiles to reach the stratosphere and benefit from an efficient global distribution. Consequently, the local significance of these CIEs calls into question global correlations based on C-isotope chemostratigraphy during the Late Permian. The timing of the Late Permian Chinese CIEs is also not reflected in changes in species ersity or ecology, unlike the sudden and global Permian–Triassic boundary crisis and subsequent Early Triassic upheavals.
Publisher: Elsevier BV
Date: 06-2020
Publisher: Wiley
Date: 05-2019
Publisher: Geological Society of America
Date: 15-07-2021
DOI: 10.1130/G49072.1
Abstract: The end-Permian mass extinction (EPME) has been recorded as the most severe bio ersity crisis in Earth's history, although the timing of the marine and terrestrial extinctions remains debatable. We present a new high-resolution magnetostratigraphic succession across the EPME and the Permian-Triassic boundary (PTB) from the Meishan sections in southeastern China, which contain the global boundary stratotype section and point (GSSP) for the base of the Triassic (also the Induan Stage) and the base of the Changhsingian Stage. We identified five normal and five reverse magnetozones, including MS1n to MS5n and MS1r to MS5r, from oldest to youngest, in the Changhsingian and Induan Stages. The Induan Stage was determined to consist of two polarity intervals, where the upper one is reverse (MS5r), and the lower one is normal (MS5n). The Changhsingian Stage is dominated by normal polarity, intercalated with four short-term reverse magnetozones (MS1r to MS4r). Consequently, the PTB and the Wuchiapingian-Changhsingian boundary are clearly located in MS5n and MS1n, respectively. These new magnetostratigraphic results provide a potential reference geomagnetic polarity pattern with which to refine the geomagnetic polarity time scale for the EPME and the Permian-Triassic transition.
Publisher: Elsevier BV
Date: 09-2009
Publisher: Informa UK Limited
Date: 09-2012
Publisher: Elsevier BV
Date: 09-2014
Publisher: Elsevier BV
Date: 03-2012
Publisher: Elsevier BV
Date: 02-2009
Publisher: Geological Society of America
Date: 03-02-2020
DOI: 10.1130/B35464.1
Abstract: The initiation and peak magmatic periods of the Emeishan Large Igneous Province (LIP) are well constrained by both biostratigraphic and radioisotopic dating methods however, the age of cessation of volcanism is poorly constrained and continues to be debated. Marine carbonates interbedded with volcanic ashes across the Guadalupian–Lopingian boundary (GLB) are widespread in south China, and these ashes provide an opportunity to study its timing, origin, and potential relationship with the Emeishan LIP. Here we present biostratigraphic constraints, mineralogical and geochemical characteristics, and high-resolution geochronology of ash layers from the Maoershan and Chaotian sections. Stratigraphic correlation, especially conodont biostratigraphy, confines these ashes to the early Wuchiapingian. Those altered ashes are geochemically akin to alkali tonsteins from the coal seams of the lower Xuanwei/Lungtan Formation in southwest China. The ashes postdating the GLB yield a coherent cluster of zircon U-Pb ages with weighted mean 206Pb/238U ages of 258.82 ± 0.61 Ma to 257.39 ± 0.68 Ma, in agreement with the ages of intrusive rocks (259.6 ± 0.5 Ma to 257.6 ± 0.5 Ma) in the central Emeishan LIP. Moreover, the ɛHf(t) values of zircons from the ashes vary from +2.5 to +10.6, a range consistent with that of the Emeishan LIP. The results collectively suggest that the early Wuchiapingian volcanic ashes are a product of extrusive alkaline magmatism and most likely mark the waning stage of the Emeishan volcanism, which may have continued until ca. 257.4 Ma in the early Wuchiapingian.
Publisher: Informa UK Limited
Date: 2000
Publisher: Cushman Foundation for Foraminiferal Research
Date: 04-2016
Publisher: Elsevier BV
Date: 06-2023
Publisher: Scandinavian University Press / Universitetsforlaget AS
Date: 07-2020
DOI: 10.1111/LET.12412
Publisher: Elsevier BV
Date: 02-2003
Publisher: American Association for the Advancement of Science (AAAS)
Date: 19-11-2021
Abstract: Felsic volcanism in South China with Cu, Hg, and S released exacerbated environmental changes that drove the end-Permian extinction.
Publisher: Elsevier BV
Date: 03-2013
Publisher: Springer Science and Business Media LLC
Date: 17-03-2021
Publisher: Elsevier BV
Date: 10-1998
Publisher: Elsevier BV
Date: 06-2022
Publisher: Elsevier BV
Date: 10-2023
Publisher: Proceedings of the National Academy of Sciences
Date: 02-05-2022
Abstract: Massive carbon (C) release with abrupt warming has occurred repeatedly during greenhouse states, and these events have driven episodes of ocean deoxygenation and extinction. Records from these paleo events, coupled with biogeochemical modeling, provide clear evidence that with continued warming, the modern oceans will experience substantial deoxygenation. There are, however, few constraints from the geologic record on the effects of rapid warming under icehouse conditions. We document a C-cycle perturbation that occurred under an Earth system state experiencing recurrent glaciation. A suite of proxies suggests increased seafloor anoxia during this event in step with abrupt increase in CO 2 partial pressure and a bio ersity nadir. Warming-mediated increases in marine anoxia may be more pronounced in a glaciated versus unglaciated climate state.
Publisher: Elsevier BV
Date: 2006
Publisher: Elsevier BV
Date: 12-2019
Publisher: Elsevier BV
Date: 03-2006
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 10-2018
Publisher: Springer Science and Business Media LLC
Date: 22-04-2022
Publisher: Elsevier BV
Date: 2001
Publisher: American Association for the Advancement of Science (AAAS)
Date: 17-01-2020
Abstract: We have pressing, human-generated reasons to explore the influence of environmental change on bio ersity. Looking into the past can not only inform our understanding of this relationship but also help us to understand current change. Paleontological records depend on fossil availability and predictive modeling, however, and thus tend to give us a picture with large temporal jumps, millions of years wide. Such a scale makes it difficult to truly understand the action of environmental forces on ecological processes. Enabled by a supercomputer, Fan et al. used machine learning to analyze a large marine Paleozoic dataset, creating a record with time intervals of only ∼26,000 years (see the Perspective by Wagner). This fine-scale resolution revealed new events and important details of previously described patterns. Science , this issue p. 272 see also p. 249
Publisher: Springer Science and Business Media LLC
Date: 18-08-2022
DOI: 10.1038/S41467-022-32438-2
Abstract: Lakes are a major emitter of the atmospheric greenhouse gas methane (CH 4 ) however, their roles in past climate warming episodes remain poorly understood owing to a scarcity of geological records. Here we report the occurrence of sustained and intensified microbial CH 4 cycling in paleo-Lake Junggar in northwestern China, one of the largest known Phanerozoic lakes, during Early Permian climate warming. High-precision U-Pb geochronology refines the age of the upper Lucaogou Formation to the Artinskian, which marks a major glacial-to-postglacial climate transition. The 13 C-enriched authigenic dolomites indicate active methanogenesis in the anoxic lake sediments, and 13 C-depleted hopanes suggest vigorous methanotrophy in the water column. The intensification of CH 4 cycling coincided with increasing global temperature, as evidenced from elevated continental chemical weathering. Our results suggest that the lacustrine CH 4 emissions acted as a positive feedback to global warming and contributed to the demise of the Late Paleozoic Ice Age.
Publisher: Elsevier BV
Date: 07-2013
Publisher: Elsevier BV
Date: 04-2016
Publisher: Elsevier BV
Date: 05-2020
Publisher: Springer Science and Business Media LLC
Date: 06-2010
Publisher: Elsevier BV
Date: 07-2013
Publisher: Elsevier BV
Date: 07-2004
Publisher: Elsevier BV
Date: 15-05-2009
Publisher: Elsevier BV
Date: 08-2002
Publisher: Elsevier BV
Date: 04-2020
Publisher: Geological Society of America
Date: 05-2017
DOI: 10.1130/G38793.1
Publisher: Elsevier BV
Date: 07-2016
Publisher: Elsevier BV
Date: 09-2015
Publisher: Elsevier BV
Date: 06-2004
Publisher: Elsevier BV
Date: 04-2016
Publisher: Springer International Publishing
Date: 2014
Publisher: Elsevier BV
Date: 02-2021
Publisher: Elsevier BV
Date: 02-2018
Publisher: Elsevier BV
Date: 04-2016
Publisher: Geological Society of London
Date: 2018
DOI: 10.1144/SP450.11
Publisher: Elsevier BV
Date: 04-2016
Publisher: Elsevier BV
Date: 09-2021
Publisher: Elsevier BV
Date: 10-2020
Publisher: Cambridge University Press (CUP)
Date: 09-2010
DOI: 10.1666/10-005.1
Abstract: A fusuline fauna consisting of 9 species of 4 genera from the Xiala Formation of the Mujiucuo section, Xainza County, Tibet, China is described. The fusuline fauna is dominated by Nankinella and Chusenella and indicates a Midian (Late Guadalupian) age. The earliest record of fusuline fauna during the Midian in the Lhasa Block suggests that the block rifted later than the Qiangtang Block to the north and the Baoshan and Tengchong blocks to the east, all of which yield much earlier fusuline faunas of Yakhtashian (Artinskian) age, but had drifted away from Gondwana to a relatively warm temperate zone in the Late Guadalupian (Middle Permian).
Publisher: Cambridge University Press (CUP)
Date: 09-2004
Publisher: Science China Press., Co. Ltd.
Date: 30-03-2017
Publisher: Wiley
Date: 07-2009
Publisher: Elsevier BV
Date: 06-2008
Publisher: Elsevier BV
Date: 05-2006
Publisher: Geological Society of London
Date: 09-12-2018
DOI: 10.1144/SP450.3
Publisher: Elsevier BV
Date: 07-2018
Publisher: Elsevier BV
Date: 03-2020
Publisher: International Union of Geological Sciences
Date: 12-2006
Publisher: Cambridge University Press (CUP)
Date: 09-2005
Publisher: Cambridge University Press (CUP)
Date: 09-2005
Publisher: Elsevier BV
Date: 03-2008
Publisher: Elsevier BV
Date: 08-2003
Publisher: Elsevier BV
Date: 2019
Publisher: Elsevier BV
Date: 08-1999
Publisher: Cambridge University Press (CUP)
Date: 09-2007
DOI: 10.1666/PLEO05-119.1
Publisher: Elsevier BV
Date: 05-2012
Publisher: International Union of Geological Sciences
Date: 12-2020
Publisher: Research Square Platform LLC
Date: 18-11-2022
DOI: 10.21203/RS.3.RS-2238947/V1
Abstract: The surficial cycling of Mg is directly coupled with the global carbon cycle, a predominant control of Earth’s climate. However, how Earth’s surficial Mg cycle evolved with time had been elusive. Magnesium isotope signatures of seawater (δ 26 Mg sw ) track the surficial Mg cycle, which could provide crucial information on the carbon cycle in Earth’s history. Here, we present a reconstruction of δ 26 Mg sw evolution over the last 2 billion years using marine halite fluid inclusions and sedimentary dolostones. The two independent archives yield consistent evolutionary trends of δ 26 Mg sw for the past 430 million years, and the dolostone records extend the δ 26 Mg sw curve to 2 billion years ago. Modeling results of the net CO 2 sequestration efficiency (E Mg−CO2 ) by the surficial Mg cycle based on the δ 26 Mg sw record reveal a secular decline E Mg−CO2 during the past 2 billion years, with the periods of low E Mg−CO2 coinciding with ice ages in the Phanerozoic. Our work underlines a previously under-appreciated, but indispensable role of dolostones in regulating Earth’s climate on geologic time scales.
Publisher: Geological Society of London
Date: 2013
DOI: 10.1144/SP376.11
Publisher: Geological Society of America
Date: 08-11-2017
DOI: 10.1130/G38430.1
Publisher: Elsevier BV
Date: 05-2021
Publisher: Elsevier BV
Date: 09-2009
Publisher: Cambridge University Press (CUP)
Date: 14-06-2019
DOI: 10.1017/JPA.2019.28
Abstract: Permian faunal affinity in the Lhasa Block plays a critical role in reconstructing its paleogeographic evolution. Cisuralian and Guadalupian faunas have been described from the Lhasa Block, but very few Lopingian (late Permian) brachiopods have been reported so far. In this paper, a new erse brachiopod fauna consisting of 17 species of 17 genera and an unidentifiable Orthotetoidea is described from the uppermost part of the Xiala Formation at the Aduogabu section in the central part of the Lhasa Block. The age of this fauna can be assigned to the Changhsingian (late Lopingian) as indicated by the associated foraminifers Colaniella parva (Colani, 1924) and Reichelina pulchra Miklukho-Maklay, 1954. Characteristic brachiopods include Spinomarginifera chengyaoyenensis Huang, 1932, Haydenella wenganensis (Huang, 1932), and Araxathyris cf. dilatatus Shen, He, and Zhu, 1992. They also generally suggest a Changhsingian age. Paleobiogeographically, this fauna is uniformly composed of typical Tethyan elements represented by Spinomarginifera Huang, 1932 and Haydenella Reed, 1944, and some cosmopolitan elements, but no typical cold-water taxa of Gondwanan affinity. This is in contrast to the contemporaneous brachiopod faunas from the Tethys Himalayan region that are characterized by typical cold-water taxa of Gondwanan affinity, e.g., Costiferina indica (Waagen, 1884), Retimarginifera xizangensis Shen et al., 2000, Neospirifer ( Quadrospina ) tibetensis Ding, 1962. Thus, it is strongly indicative that the Lhasa Block had drifted into a relatively warm-water regime during the Changhsingian. An analysis of the paleobiogeographic change of brachiopods in the Lhasa Block throughout the entire Permian further suggests that the Lhasa Block probably had rifted away from the northern peri-Gondwanan margin between the latest Cisuralian and middle Guadalupian, that is, the Neotethys Ocean had opened before middle Guadalupian.
Publisher: Wiley
Date: 03-2001
Publisher: Cambridge University Press (CUP)
Date: 09-2008
DOI: 10.1666/06-089.1
Abstract: Late Permian gastropod fauna in the Mt. Everest (Qomolangma) region, southern Tibet (Xizang), China is poorly known. This paper describes a small gastropod fauna collected by one of the authors (SSZ) from the upper part of the Qubuerga Formation at the Qubu section. The section is located at about 30 km north of Mt. Everest (Fig. 1). Although a limited number of specimens is available, the fauna is more erse than all previously reported gastropod faunas (e.g., Yu, 1975) from southern Tibet. Description of the gastropod fauna in the Mt. Everest region adds significant data for understanding the distribution of gastropods during the Late Permian and the paleobiogeographic relationship between the Himalayan and Tethyan regions.
Publisher: Informa UK Limited
Date: 2001
Publisher: Geological Society of London
Date: 28-11-2018
DOI: 10.1144/SP450.15
Publisher: Elsevier BV
Date: 04-2020
Publisher: Elsevier BV
Date: 10-2020
Publisher: Elsevier BV
Date: 06-2018
Publisher: Cambridge University Press (CUP)
Date: 09-08-2021
DOI: 10.1017/JPA.2021.66
Abstract: The tectonic evolution of the Sibumasu Block during the Permian remains controversial, and Permian faunas and their paleobiogeographic affinities provide some insight into its paleogeographic and tectonic evolutionary histories. In this paper, a new brachiopod fauna dominated by Spinomartinia prolifica Waterhouse, 1981 is described from the uppermost part of the Taungnyo Group in the Zwekabin Range, eastern Myanmar. This brachiopod fauna includes 23 species and its age is well constrained as late Kungurian by the associated conodonts, i.e., Vjalovognathus nicolli Yuan et al., 2016 and Mesogondolella idahoensis (Youngquist, Hawley, and Miller, 1951), contrary to the late Sakmarian age given to the same brachiopod faunas previously reported from southern Thailand and Malaysia. Based on comprehensive comparisons of the Cisuralian brachiopod faunas and other data in different parts of the Sibumasu Block, we consider that they are better sub ided into two independent stratigraphic assemblages, i.e., the lower (earlier) Bandoproductus monticulus-Spirelytha petaliformis Assemblage of a Sakmarian to probably early Artinskian age, and the upper (younger) Spinomartinia prolifica-Retimarginifera alata Assemblage of a late Kungurian age. The former assemblage is a typical cold-water fauna, mainly composed of Gondwanan-type genera, e.g., Bandoproductus Jin and Sun, 1981, Spirelytha Fredericks, 1924, and Sulciplica Waterhouse, 1968. The latter assemblage is strongly characterized by an admixture of both Cathaysian and Gondwanan elements, as well as some genera restricted to the Cimmerian continents. Notably, the spatial distribution pattern of these two separate brachiopod assemblages varies distinctly. The Sakmarian cold-water brachiopod faunas have been found in association with glacial-marine diamictites throughout the Sibumasu Block including both the Irrawaddy and Sibuma blocks. In contrast, the Kungurian biogeographically mixed brachiopod faunas are only recorded in the Irrawaddy Block, unlike the Sibuma Block that contains a contemporaneous paleotropical Tethyan fusuline fauna. Thus, it appears likely that by the end of Cisuralian (early Permian), the Sibumasu Block comprised the Irrawaddy Block in the south with cool climatic conditions, and the Sibuma Block in the north with a temperate to warm-water environment, separated by the incipient Thai-Myanmar Mesotethys.
Publisher: Elsevier BV
Date: 03-2023
Publisher: Elsevier BV
Date: 06-2020
Publisher: Proceedings of the National Academy of Sciences
Date: 10-02-2014
Abstract: Mass extinctions are major drivers of macroevolutionary change and mark fundamental transitions in the history of life, yet the feedbacks between environmental perturbation and biological response, which occur on submillennial timescales, are poorly understood. We present a high-precision age model for the end-Permian mass extinction, which was the most severe loss of marine and terrestrial biota in the last 542 My, that allows exploration of the sequence of events at millennial to decamillenial timescales 252 Mya. This record is critical for a better understanding of the punctuated nature and duration of the extinction, the reorganization of the carbon cycle, and a refined evaluation of potential trigger and kill mechanisms.
Publisher: Springer Science and Business Media LLC
Date: 11-05-2020
Publisher: Elsevier BV
Date: 07-2021
Publisher: American Geophysical Union (AGU)
Date: 12-2021
DOI: 10.1029/2021PA004340
Abstract: Late Paleozoic deglaciation is the first icehouse‐to‐greenhouse transition in a world with expansive tropical forests, but the detailed process of this climatic upheaval is still debated due to lack of high‐precision global correlation. Here, based on the cyclostratigraphic analysis of a deep‐marine succession of Naqing in South China, chronostratigraphic correlation was achieved between Paleo‐Tethyan deep‐marine carbonate cyclicity and U‐Pb zircon age‐calibrated cyclothems from the Pangaean paleotropics. Refining the global chronostratigraphy indicates ages of 294.1 ± 0.2 Ma and 290.1 ± 0.2 Ma for the base of the Sakmarian and Artinskian stages, respectively. We juxtapose the climatic proxies and indicators across blocks and latitudes to decipher the trends and rhythms in climate change during a period from the apex of the Late Paleozoic ice age (LPIA) to the initial deglaciation. On the multiple‐million‐year time scale, the polar and equatorial climates were linked through the atmospheric p CO 2 control. A rise in p CO 2 promoted Gondwanan deglaciation and tropical aridification. The disparity in the inferred polarity of tropical climate changes during glacials and interglacials has been confirmed on the million‐year time scale. The meridional flux of moisture was enhanced during the minima of the ∼1.2 Myr obliquity cycle, periodically resulting in Gondwanan glaciation, glacio‐eustatic sea‐level lowerings, and reduced moisture availability in the tropical Pangaean and Paleo‐Tethyan regions. Our study provides an improved temporal resolution and understanding of the apex of the LPIA.
Publisher: The Paleontological Society of Japan
Date: 09-2008
Publisher: Elsevier BV
Date: 12-2020
Publisher: Geological Society of America
Date: 03-2018
DOI: 10.1130/G40093.1
Publisher: Informa UK Limited
Date: 2005
Publisher: Wiley
Date: 09-06-2006
DOI: 10.1002/GJ.1047
Abstract: It has long been recognized that the trend of marine ersity from the Carboniferous to the Triassic includes an approximately 100‐myr‐long stable bio ersity stage ranging from the Late Carboniferous to the late Middle Permian, the most severe end‐Permian mass extinction in the Phanerozoic (pre‐Lopingian crisis and end‐Changhsingian mass extinction together), a bleak stage in the Early Triassic and a rapid recovery stage in the Middle Triassic. However, little attention has been paid to smaller ersity fluctuations among relatively stable stages in the Carboniferous and Permian. Here, we establish a database of the brachiopod fossil records from the Carboniferous to Triassic in South China, including 104 families, 373 genera, 2081 species recorded by 7948 occurrences with relatively detailed biostratigraphic controls. Analyses based on the raw taxonomic richness at familial, generic and specific levels, proportional and total extinction/origination/turnover rates, and rarefaction analyses for 21 different intervals from the Carboniferous to Triassic reveal that the brachiopod ersity trends can be generally ided into two distinctly different stages. Brachiopods were highly ersified during the Carboniferous and Permian Periods, whereas they were dramatically reduced in ersity after the end‐Changhsingian mass extinction. Brachiopods were abundant during the Early Carboniferous Tournaisian and Viséan, and were characterized by many genera extending from the Late Devonian. This was followed by a significant simple ersity decline in the Serpukhovian Stage. The Early Permian (either in Sakmarian or Artinskian) ersity decline previously perceived by coral and fusulinid workers is indicated by the raw generic and familial richness, and taxonomic richness per million years. However, it is not expressed by the rarefied brachiopod trajectory, which is probably affected by s ling effect or taxonomic selectivity. Brachiopods apparently declined from Capitanian to Early Wuchiapingian. Thus, the brachiopod ersity trajectory from Pennsylvanian Bashkirian to Late Guadalupian Capitanian generally characterises a long stable stage. Brachiopods are extremely abundant in the Late Wuchiapingian and Changhsingian in view of raw taxonomic richness, but a rarefied trajectory reveals a flat step following the pre‐Lopingian (end‐Guadalupian) crisis until the end‐Changhsingian mass extinction. Therefore, the previously widely perceived Lopingian radiation after the pre‐Lopingian crisis appears to be at least partly over‐stated. Brachiopods experienced a long bleak stage in the Early Triassic, followed by a rapid recovery in the Anisian, and reached their acme in the Norian, but never recovered to such a flourishing degree during the Carboniferous and Permian Periods. Brachiopods were eliminated in South China by the end‐Triassic withdrawal of the sea from this region. Copyright © 2006 John Wiley & Sons, Ltd.
Publisher: Cambridge University Press (CUP)
Date: 1999
DOI: 10.1017/S0022336000027530
Abstract: An enteletid brachiopod genus Peltichia Jin and Liao, 1981, is reviewed and emended based on specimens from the Permian sequences of Japan, South China, Vietnam, and Transcaucasia. New and revised taxa are Peltichia akasakensis (Ozawa), P. kwangtungensis (Zhan), P. ruzhencevi (Sokolskaja), P. sinensis (Huang), P. subtriangularis new species, P. transversus (Huang), and P. zigzag (Huang). The genus Peltichia , consisting of 10 species, ranges from Kungurian to Changhsingian, and is distributed geographically in the Tethyan Realm and its surrounding areas and probably as well as in the western Panthalassan region.
Publisher: Elsevier BV
Date: 08-2020
Publisher: Springer Science and Business Media LLC
Date: 03-11-2010
Publisher: Elsevier BV
Date: 12-2016
Publisher: Informa UK Limited
Date: 2005
Publisher: Elsevier BV
Date: 03-2006
Publisher: Geological Society of America
Date: 23-01-2012
DOI: 10.1130/G32707.1
Publisher: Rivista Italiana di Paleontologia e Stratigrafia (Research In Paleontology and Stratigraphy)
Date: 2018
Publisher: Springer Science and Business Media LLC
Date: 12-2010
Publisher: Elsevier BV
Date: 07-1995
Publisher: Elsevier BV
Date: 11-2020
Publisher: The Paleontological Society of Japan
Date: 10-2014
DOI: 10.2517/2014PR021
Location: Australia
Location: China
Location: China
Start Date: 2007
End Date: 2009
Funder: Australian Research Council
View Funded ActivityStart Date: 2015
End Date: 2017
Funder: Australian Research Council
View Funded Activity