天然气勘探与开发2024，Vol.47Issue(4)：1-14,14.DOI:10.12055/gaskk.issn.1673-3177.2024.04.001
泛扬子克拉通西部地区灯影期构造—沉积格局
Tectono-sedimentary response in the western Pan-Yangtze Craton during Dengying period
摘要
Abstract
Exploration practices have revealed abundant oil and gas resources in the Neoproterozoic Upper Sinian Dengying Forma-tion,Sichuan Basin.To ascertain paleostructure controls on reservoir and its forming together with sedimentation,and to theoretically support the subsequent exploration in this formation,it is essential to study the tectono-sedimentary response during Dengying period.Thus,the western boundary of craton was discussed according to gravity and magnetic,tectonic and sedimentary data to make clear both distribution and genesis of paleo-rift.Moreover,sedimentary patterns were explored for the Upper Yangtze Craton during the Late Sinian Dengying period in line with the train of thought on structure-controlled depositional architecture.Results show that(i)for the Yangtze Craton,its west side extends westward to Jinshajiang-Honghe fault zone from Longmenshan-Anninghe fault zone,creating the so-called Pan-Yangtze Craton where is developed with three intra-cratonic rifts;(ii)the western Pan-Yangtze Craton is divided into two sub-cratonic basins of the east and the west through these rifts;(iii)the east sub-cratonic basin is dominated by dolomite in rela-tively restricted depositional setting,while the west of thicker limestone in relatively open setting;and(iv)with lateral connection,a superior source-reservoir assemblage which serves as the key exploration target in the Dengying Formation is built due to sedimentary buildup in the rifts or platform marginal zones on both sides of the craton.It is worth to note Wanyuan-Dazhou rift as an exploration prospect.关键词
构造—沉积格局/克拉通内裂陷/晚震旦世灯影期/泛扬子克拉通西部Key words
Tectono-sedimentary response/Intra-cratonic rift/Late Sinian Dengying period/Western Pan-Yangtze Craton引用本文复制引用
李楠,李国辉,苑保国,王文之,钱红杉,黄茂轩,陈曦,李成龙..泛扬子克拉通西部地区灯影期构造—沉积格局[J].天然气勘探与开发,2024,47(4):1-14,14.基金项目
中国石油集团公司攻关性应用性科技专项(编号:2023ZZ16). （编号:2023ZZ16）
