Development of the East Asian monsoon: Mineralogical and sedimentologic records in the northern South China Sea since 20 Ma

doi:10.1016/j.palaeo.2007.07.009

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Development of the East Asian monsoon: Mineralogical and sedimentologic records in the northern South China Sea since 20 Ma
	Wan, Shiming ; Li, Anchun ; Clift, Peter D.; Stuut, Jan-Berend W.
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2007-10-22
卷号	254 期号:3-4 页码:561-582
关键词	East Asian Monsoon South China Sea Clay Minerals Quartz Grain Size Odp Leg 184
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2007.07.009
文献子类	Article
英文摘要	We here reconstruct the past change of the East Asian monsoon since 20 Ma using samples from Ocean Drilling Program (ODP) Site 1146 in the northern South China Sea based On a multi-proxy approach including a monomineralic quartz isolation procedure, identification of clay minerals by X-ray Diffraction (XRD) and grain-size analysis of isolated terrigenous materials. Terrigenous supply to ODP Site 1146 was dominated by changes in the strength of multiple sources and transport processes. Grain-size data modeled by an end-member modeling algorithm indicate that eolian dust from the and Asian inland and fluvial input have contributed on average 20% and 80% of total terrigenous material to ODP Site 1146, respectively. Specifically, about 40-53% of the total (quartz+feldspar) and only 6-11% of the total clay is related to eolian supply at the study site. Detailed analysis of the sedimentary environment, and clay minerals combined with previous studies shows that smectite originates mainly from Luzon, kaolinite from the Pearl River and illite and chlorite from the Pearl River, Taiwan and/or the Yangtze River. The proportion and mass accumulation rate (MAR) of the coarsest end-member EM1 (interpreted as eolian dust), ratios of (illite+chlorite)/smectite, (quartz+feldspar)% and mean grain-size of terrigenous materials at ODP Site 1146 were adopted as proxies for East Asian monsoon evolution. The consistent variation of these independent proxies since 20 Ma shows three profound shifts in the intensity of East Asian winter monsoon relative to summer monsoon, as well as aridity of the Asian continent, occurred at similar to 15 Ma, similar to 8 Ma and the youngest at about 3 Ma. In comparison, the summer monsoon intensified contemporaneously with the winter monsoon at 3 Ma. The phased uplift of the Himalaya-Tibetan plateau may have played a significant role in strengthening the Asian monsoon at similar to 15 Ma, 8 Ma and 3 Ma. (C) 2007 Elsevier B.V. All rights reserved.; We here reconstruct the past change of the East Asian monsoon since 20 Ma using samples from Ocean Drilling Program (ODP) Site 1146 in the northern South China Sea based On a multi-proxy approach including a monomineralic quartz isolation procedure, identification of clay minerals by X-ray Diffraction (XRD) and grain-size analysis of isolated terrigenous materials. Terrigenous supply to ODP Site 1146 was dominated by changes in the strength of multiple sources and transport processes. Grain-size data modeled by an end-member modeling algorithm indicate that eolian dust from the and Asian inland and fluvial input have contributed on average 20% and 80% of total terrigenous material to ODP Site 1146, respectively. Specifically, about 40-53% of the total (quartz+feldspar) and only 6-11% of the total clay is related to eolian supply at the study site. Detailed analysis of the sedimentary environment, and clay minerals combined with previous studies shows that smectite originates mainly from Luzon, kaolinite from the Pearl River and illite and chlorite from the Pearl River, Taiwan and/or the Yangtze River. The proportion and mass accumulation rate (MAR) of the coarsest end-member EM1 (interpreted as eolian dust), ratios of (illite+chlorite)/smectite, (quartz+feldspar)% and mean grain-size of terrigenous materials at ODP Site 1146 were adopted as proxies for East Asian monsoon evolution. The consistent variation of these independent proxies since 20 Ma shows three profound shifts in the intensity of East Asian winter monsoon relative to summer monsoon, as well as aridity of the Asian continent, occurred at similar to 15 Ma, similar to 8 Ma and the youngest at about 3 Ma. In comparison, the summer monsoon intensified contemporaneously with the winter monsoon at 3 Ma. The phased uplift of the Himalaya-Tibetan plateau may have played a significant role in strengthening the Asian monsoon at similar to 15 Ma, 8 Ma and 3 Ma. (C) 2007 Elsevier B.V. All rights reserved.
学科主题	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
URL标识	查看原文
语种	英语
WOS记录号	WOS:000250642800013
公开日期	2010-12-24
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/5063]
专题	海洋研究所_海洋地质与环境重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Univ Aberdeen, Kings Coll, Sch Geosci, Aberdeen AB24 3UE, Scotland 3.Univ Bremen, MARUM Ctr Marine Environm Sci, D-28334 Bremen, Germany
推荐引用方式 GB/T 7714	Wan, Shiming,Li, Anchun,Clift, Peter D.,et al. Development of the East Asian monsoon: Mineralogical and sedimentologic records in the northern South China Sea since 20 Ma[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2007,254(3-4):561-582.
APA	Wan, Shiming,Li, Anchun,Clift, Peter D.,&Stuut, Jan-Berend W..(2007).Development of the East Asian monsoon: Mineralogical and sedimentologic records in the northern South China Sea since 20 Ma.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,254(3-4),561-582.
MLA	Wan, Shiming,et al."Development of the East Asian monsoon: Mineralogical and sedimentologic records in the northern South China Sea since 20 Ma".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 254.3-4(2007):561-582.