石油实验地质2017，Vol.39Issue(3)：311-317,326,8.DOI:10.11781/sysydz201703311
塔里木盆地柯坪地区寒武系玉尔吐斯组沉积环境分析
Sedimentary characteristics and depositional environment of Yuertusi Formation in Keping area, Tarim Basin
摘要
Abstract
The Lower Cambrian Yuertusi Formation in the Keping area of the Tarim Basin consists of bedded cherts, black shales and dolostones.Its sedimentary environment was studied based on sequence stratigraphy, lithology, hydrocarbon-forming organisms and geochemical features of outcrops, which provided evidences for the prediction of lithofacies palaeogeography and source rock during the Early Cambrian.The lower bedded cherts and middle black shales formed one third-order sequence SQ1, which was controlled by transgression and upwelling in the Early Cambrian and represented a regressive cycle.The upper thin-middle bedded dolostones of Yuertusi Formation and the lower thick dolostones of Xiaoerbulake Formation formed another third-order sequence SQ2, which represented a transgressive cycle.The sedimentary environment of these two sequences evolved from shallow to deep and then again to shallow shelves.The black shales of SQ1 represented an anoxic sedimentary environment of deep shelf, which was favorable for source rock development.关键词
沉积环境/玉尔吐斯组/寒武系/柯坪地区/塔里木盆地Key words
sedimentary environment/Yuertusi Formation/Cambrian/Keping area/Tarim Basin分类
能源科技引用本文复制引用
陈强路,储呈林,胡广,陈跃,黄继文,姜海健..塔里木盆地柯坪地区寒武系玉尔吐斯组沉积环境分析[J].石油实验地质,2017,39(3):311-317,326,8.基金项目
国家重点基础研究发展计划(973计划)项目(2012CB214801)及中国石化科技部项目(P12004)联合资助. （973计划）
