| 摘要: |
| 研究了长江水下三角洲表层沉积物中0.063～0.125 mm粒级的碎屑矿物组成、组合类型及其分布特征,并对研究区碎屑矿物成熟度、物质来源、沉积环境以及组合分区进行了探讨。结果表明,该区轻矿物占主体,质 量分数平均达95.09%,以石英、长石为主;重矿物共37种,以普通角闪石、绿帘石、绢云母、普通辉石、白云母、赤铁矿、透闪石和褐铁矿为主。依据碎屑 矿物含量及分布特征,将研究划分为3个矿物组合区,各区重矿物组合类型不仅与物质来源有关,而且受水动力条件和沉积环境制约。 |
| 关键词: 碎屑矿物 长江水下三角洲 矿物组合 |
| DOI： |
| 分类号: |
| 基金项目:908专项课题(908-02-05,908-01-CJ11);青岛市科技发展计划课题(05-2-JC-79) |
|
| Research of detrital minerals in the sediment of sub-aqueous Yangtze Delta |
|
|
| Abstract: |
| The composition, assemblages and distribution of detrital minerals sized between 0.063 mm and 0.125 mm in the surface sediment of the sub-aqueous Yangtze Delta have been studied. And then maturation, sources of detrital minerals, sedimentary environment, mineral assemblage zones are discussed, The result shows that detrital minerals of study area are mainly composed of light minerals, account for 95.09%. The majorities of light minerals are quartz and feldspar; there are 37 kinds of heavy minerals, among which dominant minerals are common hornblende, epidote, sericite, augite, muscovite, hematite, tremolite and limonite. Study zone can be divided into 3 mineral assemblage zones based on heavy mineral contents and distribution characteristics, which are not only related to matter source, but also controlled by hydrodynamic condition and sedimentary environment in the sub-aqueous Yangtze Delta. |
| Key words: detrital mineral sub-aqueous Yangtze Delta mineral assemblages |
