Osmium isotope of the Co-rich crust from seamount Allison, central Pacific and its use for determination of growth hiatus and growth age

doi:10.1007/s11430-008-0101-9

	Osmium isotope of the Co-rich crust from seamount Allison, central Pacific and its use for determination of growth hiatus and growth age
	Meng XianWei 1; Liu YanGuang 1; Qu WenJun 2; Shi XueFa 1
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2008-10
卷号	51 期号:10 页码:1446-1451
关键词	seamount Allison Co-rich crust Os isotope growth hiatus
ISSN号	1006-9313
DOI	10.1007/s11430-008-0101-9
英文摘要	Based on its microstructure, Co-rich crust A1-1 from seamount Allison, central Pacific, was scraped at averaged interval of 1.3 mm to measure osmium isotopic composition, and subsequently to establish the Os-187/Os-188 profile of scraping section of the crust. By observing the variation of Os-187/Os-188 under Be-10 chronology and matching it to the well-known seawater Os isotope evolution of the past 40 Ma, two growth hiatuses (H1 and H2) occurring in the periods respectively between 13.6 and 29.6 Ma and between 8 and 9.8 Ma in the crust were recognized. According to the two hiatuses, the dating scheme for each scraped layer of the crust was suggested. For the upper layers younger than 6.8 Ma, their growth ages were calibrated under Be-10 chronology; for the lower layers older than 6.8 Ma, their growth ages were obtained from Os-187/Os-188 evaluation curve by linear interpolation. Hereby, the age for the most inner layer of the crust was determined to be 39.5 Ma. H1 and H2 exactly correspond to the boundary between phosphatization and non-phosphatization and volcanic ash layer in the crust, respectively.
资助项目	China Oceanic Mineral Resource Research and Development Association (COMRA)[2006DFB21620] ; China Oceanic Mineral Resource Research and Development Association (COMRA)[DY105-01-01-09]
WOS关键词	FERROMANGANESE CRUSTS ; SEA-WATER ; METALLIFEROUS CARBONATES ; RECORD ; BE-10 ; SEAWATER ; COBALT ; OCEANS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000259790100008
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26977]
专题	自然资源部第一海洋研究所
通讯作者	Meng XianWei
作者单位	1.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China 2.Natl Res Ctr Geoanal, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Meng XianWei,Liu YanGuang,Qu WenJun,et al. Osmium isotope of the Co-rich crust from seamount Allison, central Pacific and its use for determination of growth hiatus and growth age[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2008,51(10):1446-1451.
APA	Meng XianWei,Liu YanGuang,Qu WenJun,&Shi XueFa.(2008).Osmium isotope of the Co-rich crust from seamount Allison, central Pacific and its use for determination of growth hiatus and growth age.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,51(10),1446-1451.
MLA	Meng XianWei,et al."Osmium isotope of the Co-rich crust from seamount Allison, central Pacific and its use for determination of growth hiatus and growth age".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 51.10(2008):1446-1451.