文章基本信息

标题：PROVENANCE ANALYSIS OF THE CHANG 7 M EM BEROFTHE UPPER TRIASSIC YANCHANG FORMATION IN ZHENYUAN AREA, ORDOS BASIN, CHINA
本地全文：下载
作者：Weiling He ; Qiqi Lyu ; Yudong Li 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2020
卷号：29
期号：2
页码：1190-1199
语种：English
出版社：PSP Publishing
摘要：The source of the Chang 7 Member of the Upper Triassic Yanchang Formation in the Zhenyuan area in the southwestern Ordos Basin has been a key issue in sedimentology and reservoir geology. In this paper, we sampled the key wells of the Chang 7 Member of this area and systematically studied the rock type, mineral maturity, source index of debris components, quartz content, rock debris type and heavy mineral assemblages characteristics. By comparing the planar distribution characteristics of each factor, the partition result of the source of the target layer is obtained. The study shows that there are three sources of supply in the Chang 7 Member of the study area, which are the southwestern source of the southeast part of the Longxi ancient land, the western source of the northern part of the Longxi ancient land, and the northwestern source of the northern part of the Alxa ancient land. Among them, the southwestern source is the main source, while the western source and the northwest source are secondary sources. These three sources intersect in the northeastern part of the study area.
关键词：Provenance;heavy mineral assemblages;Yanchang Formation;Ordos Basin