湖南龙潭煤系形成时的大地构造环境

详细信息

THE GEOTECTONIC ENVIRONMENT OF LONGTAN COAL-FORMING PERIOD IN HUNAN PROVINCE

摘要: 湖南龙潭煤系属于早二叠世末-晚二叠世初期的沉积,沉积类型复杂。江南隆起东南面,以双牌-长寿断裂为界,东西两侧分属不同的物源区。通过对龙潭煤系分布、沉积环境演化、岩相展布、岩浆活动、构造特征、砂岩矿物成分及化学成分的研究认为,早二叠世末-晚二叠世初,区内大地构造环境属于较活动的被动大陆边缘。
- 大地构造 /
- 被动边缘 /
- 龙潭阶 /
- 湖南
Abstract: The Longtan coal-bearing formation in Hunan is deposited in the late of Early Permian-early of Late Permian, with the complex depositional patterns. In the middle and southern part of Hunan,there are two terrigenous supply ares in the east and west sides of the Shuangpai-Changshou fault. Based on the study of the Longtan coal bearing formation distribution, sedimentary environment evolution, lithofacies distribution, magmatic activity,sturctural analysis,mineralogic component and chemical composition of the sandstones,it is pointed out that the geotectonic environment in Hunan is a passive continental margin with the stronger activity in the late of Early Permian-early of Late Permian.
- tectonics /
- passive margins /
- Longtan Stage /
- Hunan