globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2012.12.016
Scopus记录号: 2-s2.0-84873551829
论文题名:
Paleoanthropologically significant South African sea caves dated to 1.1-1.0 million years using a combination of U-Pb, TT-OSL and palaeomagnetism
作者: Pickering R.; Jacobs Z.; Herries A.I.R.; Karkanas P.; Bar-Matthews M.; Woodhead J.D.; Kappen P.; Fisher E.; Marean C.W.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 65
起始页码: 39
结束页码: 52
语种: 英语
英文关键词: Geochronology ; Palaeomagnetism ; Pinnacle Point ; South African cave deposits ; TT-OSL dating ; U-Pb dating
Scopus关键词: Cave deposits ; Palaeomagnetism ; Pinnacle Point ; TT-OSL dating ; U-Pb dating ; Caves ; Climate change ; Deposits ; Geomagnetism ; Lead ; Luminescence ; Sea level ; Sedimentology ; Uranium ; Geochronology ; age determination ; anthropology ; archaeological evidence ; artifact ; beach ; cave deposit ; coastal sediment ; geochronology ; highstand ; paleomagnetism ; sea level ; uranium-lead dating ; Mossel Bay ; Pinnacle Point ; South Africa ; Western Cape
英文摘要: Deposits in sea caves found along the southern coastline of South Africa have produced a rich and detailed archaeological record of early modern humans. There is, however, little evidence for coastal cave deposits and human occupation older than MIS5e (~120 ka). Based on the correlation of four different chronological methods we present evidence for remnant cave deposits of 1.1-1.0 Ma from the quartzite sea cliff of Pinnacle Point, near Mossel Bay. Initial uranium-thorium ages at isotopic equilibrium indicated an age of >500 ka for two flowstone layers, confirmed by uranium-lead dating of these flowstones from 1.099 ± 0.012 to 1.047 ± 0.011 Ma. TT-OSL (thermally transferred optically stimulated luminescence) provides an age of 1.02 ± 0.088 Ma for the sand grains imbedded in the tufa underlying the flowstone and 0.720 ± 0.066 to 0.665 ± 0.056 for the overlying beach sediments, producing an internally consistent age sequence centring on 1.0-1.1 Ma. The normal palaeomagnetic signal of the younger section of the flowstone is interpreted to represent the Jaramillo between 1.07 and 0.99 Ma. There is a clear hiatus in the middle of this flowstone, leading us to interpret the lower normal signal as the Punaruu event at ~1.115-1.1051 Ma. Together these four techniques point to an age of 1.1-1.0 Ma for these cave deposits at Pinnacle Point, far older than anticipated. The persistent presence of these 1.1-1.0 Ma deposits means that the enigmatic lack of Earlier Stone Age (Acheulean) artefacts in the sea caves along this coastal region can no longer be explained entirely by the age of the caves or through removal of sediments by previous sea level highstands. We believe that these and other coastal caves from this region, if located high enough above sea level, may contain deposits of great antiquity, which could provide outstanding records of climate, environment, sea level change, and human occupation back into the early to middle Pleistocene. © 2013 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60689
Appears in Collections:过去全球变化的重建

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作者单位: School of Earth Sciences, University of Melbourne, McCoy Building, Cnr Swanston and Elgin Streets, Parkville, Melbourne, VIC 3010, Australia; Centre for Archaeological Science, School of Earth and Environmental Sciences, University of Wollongong, NSW 2522, Australia; Australian Archaeomagnetism Laboratory, Department of Archaeology, Environment and Community Planning, Faculty of Humanities and Social Sciences, La Trobe University, Vic. 3086, Australia; Ephoreia of Palaeoanthropology-Speleology of Southern Greece, Ministry of Culture, Greece; Geological Survey of Israel, 30 Malchei Israel St., Jerusalem 95501, Israel; Department of Physics, Faculty of Science, Technology and Engineering, La Trobe University, Vic. 3086, Australia; Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Po Box 872402, Tempe, AZ 85287-2402, United States

Recommended Citation:
Pickering R.,Jacobs Z.,Herries A.I.R.,et al. Paleoanthropologically significant South African sea caves dated to 1.1-1.0 million years using a combination of U-Pb, TT-OSL and palaeomagnetism[J]. Quaternary Science Reviews,2013-01-01,65
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