ORCID Profile
0000-0003-4768-5978
Current Organisation
Friedrich-Alexander-Universität Erlangen-Nürnberg
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Publisher: Elsevier BV
Date: 07-2018
Publisher: Elsevier BV
Date: 11-2013
Publisher: Springer Science and Business Media LLC
Date: 02-2014
Publisher: Elsevier BV
Date: 07-2012
Publisher: Frontiers Media SA
Date: 04-01-2019
Publisher: Elsevier BV
Date: 04-2017
Publisher: Geological Society of America
Date: 2015
Publisher: American Geophysical Union (AGU)
Date: 12-2008
DOI: 10.1029/2008GC002112
Publisher: Springer Science and Business Media LLC
Date: 29-01-1998
Publisher: Elsevier BV
Date: 09-2022
Publisher: Elsevier BV
Date: 2016
Publisher: Wiley
Date: 08-02-2021
Publisher: Wiley
Date: 08-03-2020
Publisher: Oxford University Press (OUP)
Date: 29-03-2006
Publisher: Elsevier BV
Date: 07-2007
Publisher: Springer Berlin Heidelberg
Date: 2018
Publisher: American Geophysical Union (AGU)
Date: 12-2015
DOI: 10.1002/2015GC005884
Publisher: Elsevier BV
Date: 2016
Publisher: Elsevier BV
Date: 10-2014
Publisher: Springer Science and Business Media LLC
Date: 17-09-2014
DOI: 10.1038/NCOMMS5923
Abstract: Large igneous province subduction is a rare process on Earth. A modern ex le is the subduction of the oceanic Hikurangi Plateau beneath the southern Kermadec arc, offshore New Zealand. This segment of the arc has the largest total lava volume erupted and the highest volcano density of the entire Kermadec arc. Here we show that Kermadec arc lavas south of ~32°S have elevated Pb and Sr and low Nd isotope ratios, which argues, together with increasing seafloor depth, forearc retreat and crustal thinning, for initial Hikurangi Plateau-Kermadec arc collision ~250 km north of its present position. The combined data set indicates that a much larger portion of the Hikurangi Plateau (the missing Ontong Java Nui piece) than previously believed has already been subducted. Oblique plate convergence caused southward migration of the thickened and buoyant oceanic plateau crust, creating a buoyant 'Hikurangi' mélange beneath the Moho that interacts with ascending arc melts.
Publisher: Oxford University Press (OUP)
Date: 09-2015
Publisher: American Geophysical Union (AGU)
Date: 03-2022
DOI: 10.1029/2021GC010066
Abstract: Abundant volcanic activity occurs in the back‐arc region of the northern Tofua island arc where the Northeast Lau Spreading Center (NELSC) propagates southwards into older crust causing the formation of numerous seamounts at the propagating rift tip. An off‐axis volcanic diagonal ridge (DR) occurs at the eastern flank of the NELSC, linking the large rear‐arc volcano Niuatahi with the NELSC. New geochemical data from the NELSC, the southern propagator seamounts, and DR reveal that the NELSC lavas are tholeiitic basalts whereas the rear‐arc volcanoes typically erupt lavas with boninitic composition. The sharp geochemical boundary probably reflects the viscosity contrast between off‐axis hydrous harzburgitic mantle and dry fertile mantle beneath the NELSC. The new data do not indicate an inflow of Samoa plume mantle into the NELSC, confirming previously published He isotope data. The NELSC magmas form by mixing of an enriched and a depleted Indian Ocean‐type upper mantle end‐member implying a highly heterogeneous upper mantle composition in this area. Most NELSC lavas are little affected by a slab component implying that melting is adiabatic beneath the spreading center. The DR lavas show the influence of a component from the subducted Louisville Seamount Chain, which was previously thought to be restricted to the nearby arc volcanoes Niuatoputapu and Tafahi. This signature is rarely detected along the NELSC implying little mixing of melts from the low‐viscosity hydrous portion of the mantle wedge beneath the rear‐arc volcanoes into the melting region of the dry mantle beneath the NELSC.
Publisher: Elsevier BV
Date: 09-2018
Publisher: Elsevier BV
Date: 03-2012
Publisher: Springer Science and Business Media LLC
Date: 25-04-2016
Publisher: American Geophysical Union (AGU)
Date: 10-2013
DOI: 10.1002/GGGE.20267
Publisher: Frontiers Media SA
Date: 13-06-2018
Publisher: Springer Science and Business Media LLC
Date: 11-04-2017
Publisher: Springer Science and Business Media LLC
Date: 17-03-2013
DOI: 10.1038/NGEO1758
Publisher: Elsevier BV
Date: 09-2019
Publisher: Springer Science and Business Media LLC
Date: 29-01-2012
Publisher: Elsevier BV
Date: 04-2018
Publisher: Geological Society of America
Date: 04-2013
DOI: 10.1130/G33911.1
Publisher: Elsevier BV
Date: 11-2015
Publisher: Elsevier BV
Date: 05-2014
Publisher: Elsevier BV
Date: 2011
Publisher: Springer Science and Business Media LLC
Date: 04-12-2012
Publisher: American Geophysical Union (AGU)
Date: 09-2020
DOI: 10.1029/2020GC008946
Publisher: American Geophysical Union (AGU)
Date: 11-2019
DOI: 10.1029/2019GC008562
Publisher: American Geophysical Union (AGU)
Date: 29-06-2021
DOI: 10.1029/2020TC006663
Abstract: The Dom João de Castro seamount in the Hirondelle Basin (Azores) is a central volcano on the ultraslow erging Terceira Rift axis. The combination of structural and geochemical data provides insights into the evolution of central volcanoes in oceanic rift systems above the Azores melting anomaly. The orientation of fault scarps and volcanic structures at D. João de Castro and the adjacent Castro fissure zone indicate that the regional SW‐NE extending stress field dominates the morphology of the NW Hirondelle Basin. The regional tectonic stress field controls the crustal melt pathways and leads to dike emplacement along fissure zones and the prevalent eruption of mafic lavas. The occurrence of mafic to felsic lavas at D. João de Castro gives evidence for both a deep and a shallow crustal melt reservoir generating a subordinate local stress field at the seamount. New Sr‐Nd‐Pb isotope data along with incompatible trace element ratios indicate that D. João de Castro and the Castro Ridges originated from similarly heterogeneous mantle source but did not form simultaneously. Our new model implies that central volcanoes along the Terceira Rift form by the growth of volcanic ridges and transitioned into circular edifices after magmatic systems generate local changes in the regional lithospheric stress field. The geometry of D. João de Castro and other magmatic systems along the Terceira Rift combined with the alkaline nature of the erupted lavas, and the large lithosphere thickness indicates that young oceanic rifts are more similar to continental rifts rather than mid‐ocean ridges.
Publisher: Geological Society of London
Date: 2021
DOI: 10.1144/M55-2018-37
Publisher: American Geophysical Union (AGU)
Date: 08-2003
DOI: 10.1029/2003GL017500
Publisher: Oxford University Press (OUP)
Date: 06-2017
Publisher: Elsevier BV
Date: 06-2013
Publisher: Oxford University Press (OUP)
Date: 03-2017
Location: No location found
No related grants have been discovered for Karsten Haase.