DOI: 10.1016/j.palaeo.2015.10.036
论文题名: Geochemical records of Taiwan-sourced sediments in the South China Sea linked to Holocene climate changes
作者: Huang J. ; Wan S. ; Xiong Z. ; Zhao D. ; Liu X. ; Li A. ; Li T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 441 起始页码: 871
结束页码: 881
语种: 英语
英文关键词: Chemical weathering
; East Asian monsoon
; Geochemistry
; Physical erosion
; South China Sea
; Taiwan
英文摘要: We present a multi-proxy geochemical analysis of core KNG5 retrieved from the northern South China Sea slope spanning the last 13.0 ka BP to assess the response of weathering and erosion processes in the Southwestern Taiwan River basin to climate change. A provenance analysis indicates that the core sediments were primarily derived from the Southwestern Taiwan River, and can be used to reconstruct the erosion and/or weathering history of this river basin. The chemical index of alteration, the plagioclase index of alteration, Rb/Sr, Al/Ti, principle component 1, and K/Al combined with terrigenous mass accumulation rates and the proportion of clay exhibit sharp excursions from 12.0 to 5.5 ka, peaking at 10.0 ka, which suggests strong chemical weathering and physical erosion during the Early-Mid Holocene, the period of the maximum summer monsoon. Abrupt falling weathering trends during 5.2 and 3.5 ka BP correlate with a weaker monsoon. After 3.5 ka BP, a stable lower weathering trend to the present day was evident, indicating the deposition of less weathered sediments in the slope when the monsoon rainfall was weakening. A good correlation between our proxy records of chemical weathering and variations of the monsoon intensity in South China emphasizes that variation in monsoon intensity is most likely the primary drive of the intensity of weathering and erosion in Southwestern Taiwan River sediments over the last 13.0 ka BP. Finally, we concluded that geochemical parameters can be used as reliable proxies for climate variation on a millennial-centennial time scale in such areas as Taiwan, where weathering-limited regimes exist. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68703
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
Recommended Citation:
Huang J.,Wan S.,Xiong Z.,et al. Geochemical records of Taiwan-sourced sediments in the South China Sea linked to Holocene climate changes[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,441