| 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 | |
| 2003-06-01 | |
| 发表期刊 | CHINESE SCIENCE BULLETIN
 |
| ISSN | 1001-6538 |
| 卷号 | 48页码:110-116 |
| 文章类型 | Article |
| 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.; 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. |
| 关键词 | East Pacific Surface Sediment Smectite Origin |
| 学科领域 | Multidisciplinary Sciences |
| DOI | 10.1360/01we0018 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000183335900017 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/3800 |
| 专题 | 海洋地质与环境重点实验室 |
| 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. |
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