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. |
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