四川盆地西北部早-晚三叠世物源分析及其构造意义  

Provenance Analysis of Early Late Triassic in Northwest Sichuan Basin and Its Tectonic Significance

作　　者：沈桐 孟立丰 牛思雨 Shen Tong;Meng Li-feng;Niu Si-yu

机构地区：[1]西南石油大学地球科学与技术学院

出　　处：《化工设计通讯》2019年第12期251-252,共2页Chemical Engineering Design Communications

摘　　要：对含油气盆地的地质构造、源汇体系进行研究是厘清盆山关系的关键,也是进行油气勘探的重要基础工作。经研究分析可得,川西北地区早三叠世早期物源主要来自于康滇古陆,之后物源逐渐转移为龙门山岛链以及秦岭造山带,到中叠世时期,川西北地区无碎屑岩,周缘物源区活动暂停,直到晚三叠世,由于古特提斯洋的闭合,周缘活动重新开始,形成多物源体系,主要物源来自于秦岭造山带,龙门山褶皱带以及松潘-甘孜褶皱带。To study the geological structure and source sink system of petroliferous basin is the key to clarify the relationship between basin and mountain,and also the important basic work for oil and gas exploration.According to the study and analysis,the early provenance of the Early Triassic in Northwest Sichuan mainly came from the Kangdian ancient land,and then the provenance gradually transferred to the Longmenshan island chain and Qinling orogenic belt.In the Middle Triassic,there was no clastic rock in Northwest Sichuan,and the activity of the peripheral provenance was suspended until the Late Triassic.Due to the closure of the paleoTethys ocean,the peripheral activity began again,forming a multi provenance system.The important materials come from Qinling orogenic belt,Longmenshan fold belt and Songpan Ganzi fold belt.

关 键 词：四川盆地 三叠纪 碎屑岩骨架颗粒统计 Dickinson三角图解 古流向 

分 类 号：P618.13[天文地球—矿床学]