Mineralogy of smectites in the surface sediments from the East Pacific and its significance

doi:10.1360/01we0018

	Mineralogy of smectites in the surface sediments from the East Pacific and its significance
	Zhang, HP ; Shi, XF ; Chen, J ; Xue, YF ; He, JF ; Zhu, DS ; Xin, CY ; Wei, JW
刊名	CHINESE SCIENCE BULLETIN
	2003-06
卷号	48 页码:110-116
关键词	East Pacific surface sediment smectite origin
ISSN号	1001-6538
DOI	10.1360/01we0018
英文摘要	XRD, TEM, SEM and EDS are employed to analyze smectites in the clay fraction of the surface sediments from the East Pacific. It is shown from the XRD results that the clay fraction consists of about 20% smectites. Three types of smectites are identified, Fe-rich (Type I), Fe, Mg-rich (Type II) and Na,Ca smectite (Type III), and most of them are not well-crystallized. Type I is widely distributed in sediments, showing honeycomblike in the SEM, and aggregated or dispersive hairlike, or cloudy assemblage with a bit curl near its edge in the TEM. This type is considered to be typomorphic type of authigenic smectite in the East Pacific. Type II is similar to Type I in micromorphology in the TEM, showing a transition micronite, while Type III is tabletlike in the TEM with an unclear edge. Type I may be altered from volcanics and some of them even precipitated from the low subthermal water. Type II could also be formed in the ocean floor, while Type III comes from dry and distant continental area. This study suggests that the characteristic of chemical composition and morphology of smectite may give a clue to understand sediment source, origin of minerals and sedimentation in the deep sea.
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000183335900017
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/4841]
专题	自然资源部第一海洋研究所
作者单位	1.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China; 2.Res Inst Petr Explorat & Dev, Lab Ctr, Beijing 100081, Peoples R China; 3.Res Inst Petr Chem, Beijing 100081, Peoples R China; 4.Peking Univ, Dept Phys, Beijing 100081, Peoples R China; 5.Acad Sinica, Grad Sch, Beijing 100039, Peoples R China; 6.Acad Sinica, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Zhang, HP,Shi, XF,Chen, J,et al. Mineralogy of smectites in the surface sediments from the East Pacific and its significance[J]. CHINESE SCIENCE BULLETIN,2003,48:110-116.
APA	Zhang, HP.,Shi, XF.,Chen, J.,Xue, YF.,He, JF.,...&Wei, JW.(2003).Mineralogy of smectites in the surface sediments from the East Pacific and its significance.CHINESE SCIENCE BULLETIN,48,110-116.
MLA	Zhang, HP,et al."Mineralogy of smectites in the surface sediments from the East Pacific and its significance".CHINESE SCIENCE BULLETIN 48(2003):110-116.