The Characteristics of Longeni-Angdaercuo Paleo-Oil Dolomite in Southern Part of the Central Uplift Zone of Qiangtang Basin and Its Forming Mechanism

• 责任者：Liu Jianqing (Chengdu Institute of Geology and Mineral Resources ; Chengdu 610082 ; China) ; Yang Ping
• 刊名：Earth Science Frontiers
• 出版年：2010
• 卷期：17（1)
• 关键词：油气成因 ; oil-gas origin ; 白云岩 ; dolostone ; 羌塘盆地 ; Qiangtang Bsain
• 页码：p.311-321
• 图表：10 illus., 15 refs.
• 分类号：1003
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

Based on the field survey, the authors have conducted a series of research on the Longeni-Angdaercuo paleo-oil dolomite in southern part of Qiangtang Basin central uplift zone, including its mineral and crystal characteristics, lithological composition, sedimentary facies, fluid inclusion, carbon and oxygen isotope. The micro- structures of dolomite consist of four types: remnant ooid structure, fogged center and clear margin structure, ring structure and generation growth texture. The dolomitization mainly took place in plateau border shallow water belt, tidal-flat and plateau border algal reef. All of the information mentioned above suggests that the dolomite in this area should be the result of mixed water replacement of calcite.