• 责任者：Ma Boyong (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Wang Xunlian
• 刊名：Geological Bulletin of China
• 出版年：2009
• 卷期：29(5)
• 关键词：碳酸盐岩 ; carbonate rocks ; 沉积微相 ; sedimentary microfacies ; 沉积环境 ; sedimentary environment ; 羌塘盆地 ; Qiangtang Basin
• 页码：p.609-617
• 图表：3 illus., 2 plates, 31 refs.
• 分类号：0803
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

mal style="MARGIN: 0cm 0cm 0pt; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2">man">In the present paper, the Middle Jurassic Buqu Formation section containing asphaltum vein is studied in the Gongri area, eastern part of Qiangtang Basin, mas-microsoft-com:office:smarttags" />Tibet, nine main types of carbonate micro-facies are distinguished in the deposits. They are lime marl, lamellar power-micrite limestone, calcarenite, pellet micrite-sparite packstone,oncoid lump packstone, bioclastic packstone, bioclastic wackstone, oosparite grainstone, and bioclastic line marl. According to microfacies assemblage and sedimentary structure, carbonate rock of Buqu Formation mainly form three sedimentary environments: inner ramp, middle ramp and deep ramp. Four sedimentary cycles are recognized in the Buqu Formation, which constitue of a transgressive sequence, which is composed of entire sea-level cyclic sequence.mas-microsoft-com:office:office" />