气候变化领域集成服务门户(CCPortal): Late Neoproterozoic-to-recent long-term t–T-evolution of the Kaoko and Damara belts in NW Namibia

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DOI	10.1007/s00531-020-01819-7
	Late Neoproterozoic-to-recent long-term t–T-evolution of the Kaoko and Damara belts in NW Namibia
	Krob F.C.; Eldracher D.P.; Glasmacher U.A.; Husch S.; Salomon E.; Hackspacher P.C.; Titus N.P.
发表日期	2020
ISSN	14373254
起始页码	537
结束页码	567
卷号	109 期号:2
英文摘要	This research aims to reconstruct the Late Neoproterozoic-to-recent long-term time–temperature-evolution of the NW Namibian Kaoko and Damara belts combining numerical modeling of new thermochronological data with previously published geochronological data, i.e., U–Pb, Sm–Nd, and Rb–Sr analyses, and K/Ar, 40Ar/39Ar low-temperature thermochronology. Consequently, we retrieve a coherent long-term time–temperature-evolution of the NW Namibian Neoproterozoic basement rocks including rates of exhumation and subsidence periods over the last ~ 500 Myr. Neoproterozoic basement rocks indicate fast post-Pan African/Brasiliano cooling and exhumation, reheating, or rather subsidence during the development of the Paleozoic-to-Mesozoic SW Gondwana intraplate environment and a significant thermal overprint of the rocks during South Atlantic syn- to post-rift processes, and therefore, resemble the opponent SE Brazilian time–temperature-evolution. We provide an overview of thermochronological data including new apatite and zircon fission-track data derived from Neoproterozoic, Late Paleozoic, and Lower Cretaceous rocks. Apatite fission-track ages range from 390.9 ± 17.9 Ma to 80.8 ± 6.0 Ma in the NW Kaoko Belt with youngest ages confined to the coastal area and significant age increase towards the inland. New zircon apatite fission-track data reveal ages between 429.5 ± 47.8 and 313.9 ± 53.4 Ma for the rocks of the Kaoko Belt. In the central Damara Belt, new apatite fission-track ages range between 138.5 ± 25.3 Ma to 63.8 ± 4.8 Ma. Combined apatite fission-track age distributions from Angola to Namibia and SE Brazil correlate for both sides of the South Atlantic passive continental margin and the reset AFT ages overlap with the lateral Paraná–Etendeka dike swarm distribution. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Long-term t–T-evolution; Numerical modeling; South Atlantic passive continental margin of NW Namibia; Thermochronology
语种	英语
scopus关键词	argon-argon dating; basement rock; continental margin; exhumation; numerical model; passive margin; potassium-argon dating; Proterozoic; rubidium-strontium dating; samarium-neodymium dating; subsidence; temperature gradient; temporal evolution; thermochronology; uranium-lead dating; Damara Belt; Kaoko Belt; Namibia
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147713
作者单位	Institute of Earth Sciences, Heidelberg University, Im Neuenheimer Feld 234, Heidelberg, 69120, Germany; Department of Earth Sciences, University of Bergen, Realfagbygget, Allégt. 41, Bergen, 5020, Norway; Departamento de Petrologia e Metalogenia, Instituto de Geosciências e Ciências Exatas, Universidade Estadual Paulista, Av. 24-A, 1515, Bela Vista, Rio Claro, SP 13506-900, Brazil; Ministry of Mines and Energy, Geological Survey of Namibia, Private Bag 13297, Winhoek, Namibia
推荐引用方式 GB/T 7714	Krob F.C.,Eldracher D.P.,Glasmacher U.A.,等. Late Neoproterozoic-to-recent long-term t–T-evolution of the Kaoko and Damara belts in NW Namibia[J],2020,109(2).
APA	Krob F.C..,Eldracher D.P..,Glasmacher U.A..,Husch S..,Salomon E..,...&Titus N.P..(2020).Late Neoproterozoic-to-recent long-term t–T-evolution of the Kaoko and Damara belts in NW Namibia.International Journal of Earth Sciences,109(2).
MLA	Krob F.C.,et al."Late Neoproterozoic-to-recent long-term t–T-evolution of the Kaoko and Damara belts in NW Namibia".International Journal of Earth Sciences 109.2(2020).