湘西北慈利大庸地区上震旦统—下寒武统沉积特征及层序地层划分

1. 中国地质大学资源学院, 湖北武汉 430074;
2. 成都地质矿产研究所, 四川成都 610082;
3. Colorado School of Mines, Golden, CO 80401-1887;Present address:M arathon OilCompany, Houston, TX 77056-2725;
4. 中国地质大学, 北京 100037

基金项目:

国家自然科学基金及重点项目(40072038、49972046、40032010-B)。

详细信息

Sequence stratigraphic division of the Upper Sinian-Lower Cambrian strata in the Cili-Dayong region, northwestern Hunan

1. China University of Geosciences, Wuhan 430074, Hubei, China;
2. Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, Sichuan, China;
3. Colorado School of Mines, Golden, CO 80401-1887. Present address:Marathon Oil Company, Houston, TX 77056-2725;
4. China University of Geosciences, Beijing 100037, China

摘要: 通过对各类层序界面的识别,以沉积特征、副层序和体系域与结构转换面等层序分析,进行露头层序地层学研究,将湘西北慈利大庸地区台缘斜坡相区上震旦统-下寒武统划分为11个Ⅲ级层序,其中上震旦统7个、下寒武统4个,主要是Ⅱ型层序。在区域层序地层对比、分析的基础上初步讨论了露头层序地层分析中存在的问题。
- 上震旦统—下寒武统 /
- 沉积特征 /
- 层序地层划分 /
- 慈利-大庸地区 /
- 湘西北
Abstract: The Cili-Dayong region in northwestern Hunan lay on the passive continental margin of the southeastern Yangtze landmass during the Late Sinian to Cambrian. The bulk of the Upper Sinian strata are represented by the carbonate rocks, while the Lower Cambrian strata consist dominantly of a variety of shales and limestones. The above-mentioned strata within the platform-margin to slope facies zones are divided in this study, on the basis of sequence boundary, depositional characteristics, parasequences, systems tracts and transitional surfaces and outcrop sequence stratigraphy, into eleven third-order type 2 sequences, including seven for the Upper Sinian strata and four for the Lower Cambrian strata. Other aspects of outcrop sequence stratigraphic analysis are dealt with as well.
- Upper Sinian-Lower Cambrian strata /
- depositional characteristics /
- sequence stratigraphic division /
- Cili-Dayong zone /
- northwestern Hunan