Paleoenvironment evolution of the East Philippine Sea recorded in the new-type ferromanganese crust since the terminal Late Miocene

doi:10.1007/s11430-007-0054-4

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

	Paleoenvironment evolution of the East Philippine Sea recorded in the new-type ferromanganese crust since the terminal Late Miocene
	Xu ZhaoKai ; Li AnChun ; Jiang FuQing ; Li TieGang; Meng QingYong ; Jin Ning
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2007-08-01
卷号	50 期号:8 页码:1179-1188
关键词	New-type Ferromanganese Crust Record Paleoenvironment Evolution Uranium-series Dating Be-10 Isotope Dating East Philippine Sea
ISSN号	1006-9313
DOI	10.1007/s11430-007-0054-4
文献子类	Article
英文摘要	From systemic research of microstructure, geochemistry, uranium-series and Be-10 isotope dating on a new-type deepwater ferromanganese crust from the East Philippine Sea, the paleoenvironment evolution of the target area since the terminal Late Miocene was recovered. The vertical section changes of microstructure and chemical composition are consistent in the studied crust, which indicate three major accretion periods and corresponding paleoenvironment evolution of the crust. The bottom crust zone was formed in the terminal Late Miocene (5.6 Ma) with loose microstructure, high detritus content and high growth rate. Reductions of mineral element content, accretion rate and positive Ce-anomaly degree at 4.6 Ma indicate temporal warming, which went against the crust accretion and finally formed an accretion gap in the terminal Middle Pliocene (2.8-2.7 Ma). The more active Antarctic bottom seawaters in the Late Pliocene (2.7 Ma) facilitated the fast transfer to the top pure crust zone. Hereafter, with the further apart of volcanic source and the keeping increase of eolian material (1.0 Ma), although surrounding conditions were still favorable, mineral element content still shows an obvious reducing trend. It thereby offers new carrier and data for the unclear paleoceanographic research of the target area since the terminal Late Miocene.; From systemic research of microstructure, geochemistry, uranium-series and Be-10 isotope dating on a new-type deepwater ferromanganese crust from the East Philippine Sea, the paleoenvironment evolution of the target area since the terminal Late Miocene was recovered. The vertical section changes of microstructure and chemical composition are consistent in the studied crust, which indicate three major accretion periods and corresponding paleoenvironment evolution of the crust. The bottom crust zone was formed in the terminal Late Miocene (5.6 Ma) with loose microstructure, high detritus content and high growth rate. Reductions of mineral element content, accretion rate and positive Ce-anomaly degree at 4.6 Ma indicate temporal warming, which went against the crust accretion and finally formed an accretion gap in the terminal Middle Pliocene (2.8-2.7 Ma). The more active Antarctic bottom seawaters in the Late Pliocene (2.7 Ma) facilitated the fast transfer to the top pure crust zone. Hereafter, with the further apart of volcanic source and the keeping increase of eolian material (1.0 Ma), although surrounding conditions were still favorable, mineral element content still shows an obvious reducing trend. It thereby offers new carrier and data for the unclear paleoceanographic research of the target area since the terminal Late Miocene.
学科主题	Geosciences, Multidisciplinary
URL标识	查看原文
语种	英语
WOS记录号	WOS:000247978200007
公开日期	2010-12-24
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/5083]
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.Grad Univ, Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Xu ZhaoKai,Li AnChun,Jiang FuQing,et al. Paleoenvironment evolution of the East Philippine Sea recorded in the new-type ferromanganese crust since the terminal Late Miocene[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2007,50(8):1179-1188.
APA	Xu ZhaoKai,Li AnChun,Jiang FuQing,Li TieGang,Meng QingYong,&Jin Ning.(2007).Paleoenvironment evolution of the East Philippine Sea recorded in the new-type ferromanganese crust since the terminal Late Miocene.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,50(8),1179-1188.
MLA	Xu ZhaoKai,et al."Paleoenvironment evolution of the East Philippine Sea recorded in the new-type ferromanganese crust since the terminal Late Miocene".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 50.8(2007):1179-1188.