上海国土资源Issue(3)：96-100,5.DOI:10.3969/j.issn.2095-1329.2012.03.023
鄂尔多斯盆地晚三叠世延长组长9-长101物源分析
Sedimentary Provenance Analysis of the Chang 9–Chang 101 Depositional Stages of the Late Triassic Yanchang Formation of the Ordos Basin
摘要
Abstract
The determination of the provenance of sedimentary material is an important step in determining the paleogeography of sedimentary basin; this article presents new data for Late Triassic sedimentation associated with the Yanchang formation in the giant inland Ordos basin catchment. Analysis of paleocurrent directions, composite characteristics, and the spatial distribution of heavy and light minerals within the Chang 101 and Chang 9 depositional stages of the Yanchang formation indicates that sediments within the basin have four distinct provenances, being derived from the northeast, east, south and northwest. Of these 4 provenance directions, the majority of sediment was derived from the northeast and northwest, with sediments derived from the east and south only present in localised areas of the basin. In terms of temporal changes between the Chang 101 and Chang 9 depositional stages, an increase in material with an eastern provenance is coincident with a decrease in material derived from the west, in addition to a change in provenance direction from southwest to more directly south.关键词
鄂尔多斯盆地/延长组/古流向/物源分析/岩相古地理Key words
Ordos basin/stratum of Yanchang formation/paleocurrent direction/sediment provenance analysis/lithofacies paleogeography分类
天文与地球科学引用本文复制引用
金艳,何雁兵,刘彬彬..鄂尔多斯盆地晚三叠世延长组长9-长101物源分析[J].上海国土资源,2012,(3):96-100,5.基金项目
国家重大科技专项“鄂尔多斯盆地大型岩性地层油气藏勘探开发示范工程”(2008ZX05044-1-3-1) （2008ZX05044-1-3-1）
