| 重矿物聚类分析在物源分析及地层对比中的应用——以东海陆架盆地西湖凹陷平湖地区为例 |
| |
| 引用本文： | 武法东,陆永潮,阮小燕,周平.重矿物聚类分析在物源分析及地层对比中的应用——以东海陆架盆地西湖凹陷平湖地区为例[J].现代地质,1996(3). |
| |
| 作者姓名： | 武法东 陆永潮 阮小燕 周平 |
| |
| 作者单位： | 管理干部学院，地质矿产部上海海洋勘探开发研究院 |
| |
| 摘 要： | 通过对重矿物进行Ｒ型、Ｑ型聚类分析，结合沉积学及砂岩矿物成分的研究，认为西湖凹陷平湖区第三系沉积物陆源区母岩类型共３类。其中由重矿物组合反映的母岩包括变质岩和火成岩共２类５型。在平面分布上，平湖地区南、北母岩类型有差别：南部以中性、中酸性火成岩为主，而北部既有各类变质岩又有中基性、酸性火成岩；在纵向演化上，南北也存在较大的差异，表现为充填过程中由于物源变化而反映的不同类型重矿物组合的交替变化。第三系沉积充填过程中物源供应总体方向由西而东，可进一步分为南部古渔山凸起和中北部古海礁凸起物源区。反映物源区或母岩性质变化的Ｑ型聚类分析，作为地层划分与对比的一种辅助方法在实际工作中具有一定的使用价值。
|
| 关 键 词： | 重矿物聚类分析 碎屑物源东海陆架盆地第三系 |
APPLICATION OF HEAVY MINERALS CLUSTER ANALYSIS TO STUDY OF CLASTIC SOURCES AND STRATIGRAPHIC CORRELATION |
| |
| Wu Fadong.APPLICATION OF HEAVY MINERALS CLUSTER ANALYSIS TO STUDY OF CLASTIC SOURCES AND STRATIGRAPHIC CORRELATION[J].Geoscience——Journal of Graduate School,China University of Geosciences,1996(3). |
| |
| Authors: | Wu Fadong |
| |
| Abstract: | The R and Q type cluster analyses are performed for the heavy minerals in this paper. From these analyses and combining the study of sedimentology and mineral compound in sandstone, the authors think that there were three types of clastic soure rocks in Pinghu area during the Tertiary Period. The two types and five subtypes of metamorphic and igneous rocks are identified by the heavy mineral associations. The source rocks between south and north in the area are different: it is dominated by the intermediate and intermediate acidity igneous rocks in the south, and by metamorphic rocks with various types, intermediate basic rocks and acid igneous rocks in the north. The differences also exist in vertical evolution, which show alternative changes caused by the varieties of the source area during the sediment filling. The clastic supply during the Tertiary Period was mainly provided from west to east and could be divided into Guyushan rise in the south and Guhaijiao rise in the middle north. Showing the changes of the source areas or rock types during the depositions, the Q type cluster analysis is useful for stratigraphical division and correlation. |
| |
| Keywords: | heavy mineral cluster analysis clastic sources the East China Sea shelf basin the Tertiary Period |
| 本文献已被 CNKI 等数据库收录！ |
