globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.12.014
论文题名:
Miocene climate and vegetation changes in the Cape Peninsula, South Africa: Evidence from biogeochemistry and palynology
作者: Sciscio L.; Tsikos H.; Roberts D.L.; Scott L.; van Breugel Y.; Sinninghe Damste J.S.; Schouten S.; Grocke D.R.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 445
起始页码: 124
结束页码: 137
语种: 英语
英文关键词: Glycerol dialkyl glycerol tetraethers (GDGTs) ; Miocene ; Palaeoclimate ; Palynofloras ; Southern Hemisphere
英文摘要: Organic material from the Noordhoek area on the western margin of the Cape Peninsula, South Africa, was obtained from a ~50m-long drill-core dominated by fluvio-lacustrine siliciclastic sediments. The aim of this study is to constrain fluctuations in climate and the decline of tropical vegetation elements along the southwestern coast and the Cape Peninsula of South Africa, during the Late Cenozoic phase, when the Benguela upwelling system was established. The approach was to combine palynological, biogeochemical (tetraether lipids) and stable isotope (C, N) studies of the organic-bearing record from the Noordhoek area on the western margin of the Cape Peninsula. Bulk C and N isotope data of sediment organic matter, point to a predominantly C3 higher plant source vegetation. Mean annual air temperature (MAT) from the analyses of tetraether lipids (MBT'-CBT index) was compared with palynomorphs from partly unpublished data of a previously drilled core adjacent to the study site. The palynomorphs are of subtropical affinities, and suggest that an open riparian forest would have existed in the early to middle Miocene of the southwestern coast of South Africa. Together these data sources allow vegetation and climate reconstructions of subtropical conditions during the early to middle Miocene, which comprised fluctuating open riparian forest and swamp vegetation. Temperatures rose in the middle Miocene and were higher than those of the present day. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68576
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作者单位: Department of Geology, Rhodes University, Grahamstown, South Africa; Department of Geography, University of Free State, Bloemfontein, South Africa; Department of Plant Sciences, University of the Free State, P.O. Box 339, Bloemfontein, South Africa; Institute of Environmental Biotechnology (EBRU), Rhodes University, Grahamstown, South Africa; Royal Netherlands Institute for Sea Research (NIOZ), Department of Marine Biogeochemistry and Toxicology, P.O. Box 59, Den Burg, Texel, Netherlands; Department of Earth Sciences, University of Durham, Science Laboratories, South Road, Durham, United Kingdom; Department of Geological Sciences, University of Cape Town, Rondebosch, South Africa

Recommended Citation:
Sciscio L.,Tsikos H.,Roberts D.L.,et al. Miocene climate and vegetation changes in the Cape Peninsula, South Africa: Evidence from biogeochemistry and palynology[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,445
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