Sedimentary Features and Tectonic Environments of Silurian Volcanic-Related Carbonates in North Daba Mountains
详细信息
- 责任者：Yan Zhen (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Wang Zongqi
- 刊名：Acta Sedimentologica Sinica
- 出版年：2011
- 卷期：29(1)
- 关键词：火山作用 ; volcanism ; 碳酸盐岩 ; carbonate rocks ; 大巴山 ; Daba Mountains
- 页码：p.31-40
- 图表：5 illus., 18 refs.
- 分类号：0803
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
Bioclastic and biohermal limestones, which are widely exposed in the orogenic belt, should be formed in different tectonic environments. Identifying their composition and fossil occurrence state is of fundamental importance for palaeogeographical reconstructions and orogenic evolution. Carbonate rocks, which are closely related to alkaline basalts with high TiO2 abundance, have been regarded as platform deposits of passive margin in North Daba Mountains. The characters coevally suggest that these carbonate assemblages are sincerely associated with the underlying basalts with alkaline geochemical affinity spatially; they have the similar framework and constitute characters of modern oceanic island/sea mountain. The carbonate generally developed around the underlying basalts and deposited in the deep-water and slope environments.