ORCID Profile
0000-0003-4988-4153
Current Organisation
University of Adelaide
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Elsevier BV
Date: 08-2022
Publisher: American Geophysical Union (AGU)
Date: 12-2022
DOI: 10.1029/2022GC010559
Abstract: Pervasive intracontinental orogenesis during the Paleozoic has been widely recognized in the metamorphic and structural records of the Aileron Province and Amadeus Basin in central Australia, commonly attributed to the Ordovician–Carboniferous Alice Springs Orogeny. Comparatively less clear, however, is the magnitude and geographic expression of this event elsewhere in the North Australian Craton. This study presents new apatite fission track thermochronology data from central Australia which demonstrate considerable Paleozoic reactivation across the continental interior. Both the Tennant region and Murphy Province exhibit low‐temperature cooling coeval with the Alice Springs Orogeny (ca. 450–320 Ma), although Triassic reactivation in the Aileron Province correlates with the timing of the Hunter‐Bowen Orogeny (ca. 265–230 Ma) in eastern Australia. High heat production and metasomatism within the Aileron Province has made the region highly susceptible to reactivation, rendering it more vulnerable to subsequent reactivation in response to far‐field stresses during the progressive Tasmanides development.
Publisher: Geological Society of London
Date: 28-03-2019
DOI: 10.1144/JGS2018-146
Publisher: Elsevier BV
Date: 06-2023
Publisher: Wiley
Date: 22-01-2021
DOI: 10.1111/JMG.12590
Abstract: The Arkaroola region of the northern Flinders Ranges, South Australia, records high geothermal gradient mineral assemblages that are not spatially or temporally associated with intrusive magmatism. Cordierite‐bearing schists from the base of a ~12 km thick Neoproterozoic sedimentary sequence known as the Adelaide Rift Complex directly overlie Mesoproterozoic metasedimentary and granitic rocks with regional heat production values of ~7.9 µW/m 3 at 580 Ma, two to three times greater than global average values for granitic rocks. We integrate in‐situ U–Pb monazite geochronology, Y+HREE‐in‐monazite thermometry and mineral equilibria modelling to show that rocks at the base of the sedimentary succession record hibolite facies metamorphism at c . 580 Ma while the overlying sediments were still accumulating. Metamorphism took place under average geothermal gradient conditions in excess of 180°C/kbar ( °C/km) that propagated to depths of at least 12 km. These thermal gradients persisted for upwards of 150 Ma, maintained by a lack of crustal erosion, and are documented by long‐lived crustal anatexis. This system may be the archetypal ex le of Th–U powered metamorphism, recording the interplay between chemically extreme basement and thermally insulating sedimentary cover.
Publisher: American Chemical Society (ACS)
Date: 11-03-2022
No related grants have been discovered for Alexander De Vries Van Leeuwen.