地质学报2018，Vol.92Issue(3)：604-617,14.
川西龙门山前上三叠统小塘子组沉积环境、构造含意与含气远景
Sedimentary Environment, Tectonic Implication and Exploration Perspective of the Upper Triassic Xiaotangzi Formation in Front of Longmenshan in Western Sichuan
赵霞飞 1刘树根 1彭靖淞 2董顺利 3张银德1
作者信息
- 1. 成都理工大学,成都,610059
- 2. 中海油天津分公司勘探开发研究院,天津,300452
- 3. 中国科学院地质与地球物理研究所,北京,100029
- 折叠
摘要
Abstract
Based on the measurements of the Upper Triassic Xiaotangzi Formation (T3t) at Hanwang of Mianzhu and Hejiawan of Guangyuan,this study analyzed its sedimentary environments and facies in details.The Hejiawan T3t is attributed to shallow-water environments:shoreface bar,shelf mud,intertidal flat and wave-dominated delta.The Hanwang T3t is especially characterized by deep-water faces:shoreface bar,gulf-mud,medial-ramp channel and slumping sheets,and delta deposits.Preliminary study of pyrithe nodules collected from the Hanwang profile was also preformed.On the whole,the Xiaotangzi Formation is believed to correspond to the sedimentary model of sand-mud rich ramps.It can be pointed out that the deep-water mudstone at the middle part of Hanwang profile should mark the active thrusting tectonism of Longmenshan while the thick sandstone bodies of HST to lower part of the 2nd Member of Xujiahe Formation might deposit in the quiescence period of Longmenshan tectonic activity.This study suggests that the basal shoreface sandstone body of T3t is of highly potential for natural gas exploration.关键词
川西上三叠统小塘子组/浪控三角洲/中缓坡滑塌席/滨面砂体Key words
Upper Triassic Xiaotangzi Formation in western Sichuan/wave-dominated delta/medial-ramp slumping sheets/shoreface sandstone引用本文复制引用
赵霞飞,刘树根,彭靖淞,董顺利,张银德..川西龙门山前上三叠统小塘子组沉积环境、构造含意与含气远景[J].地质学报,2018,92(3):604-617,14.
