Redefining of the Hanmushan Group in Longshoushan, Central-Western Gansu Province
详细信息
- 责任者：Xiao Peixi (Xi’an Institute of Geology and Mineral Resource ; China Geological Survey ; Xi’an 710054 ; China) ; You Weifeng
- 刊名：Geological Bulletin of China
- 出版年：2011
- 卷期：30(8)
- 关键词：寒武纪 ; Cambrian ; 甘肃 ; Gansu Province
- 页码：p.1228-1232
- 图表：illus., 10 refs.
- 分类号：1200
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
Based on the information of sedimentary structure, fossils and metamorphic-deformation, the authors hold that the Shaohuotonggou Formation in the lower part of Hanmushan Group, which has high-grade metamorphic conglomerate, fine-grained clastic rock and carbonate assemblages, was formed in Sinian. Whereas the Caodaban Formation in the upper Hanmushan Group, which is characterized by clastic rock and carbonate assemblage of relatively low-grade metamorphism, was formed in Cambrian. The Caodaban Formation is comparable with the Lower and Middle Cambrian strata in the western margin of Ordos Basin.