沉积学报2017，Vol.35Issue(6)：1177-1185,9.DOI:10.14027/j.cnki.cjxb.2017.06.009
柴达木盆地东北缘石炭系生物礁发育特征及其地质意义
Carboniferous Organic Reef Development Characteristics and Geological Significance in Northeast Margin of Qaidam Basin
摘要
Abstract
The organic reef in the Carboniferous System along the northeast margin of Qaidam Basin was reported in this paper, and the organic reef development characteristics and regional distribution were descripted. Based on field research and indoor microscopic analysis, combining core observation and description, using geochemistry and petrol-ogy method, summarizing the biological, stratum and petrology feature of organic reef in Carboniferous, northeast mar-gin of Qaidam Basin. The article analyzed the main output layer and scale of the organic reef, discussed the palaeoen-vironment and petroleum geological significance in northeast margin of Qaidam Basin. The results showed that research area' s Reef-building organism is mainly composed by Tetracoralla and also include some Tabulata, the morphology of coral reef is very abundant, such as pyramidal-shape or plate-shape solitary coral, tubular, fasciculate and cellular colonial coral. Reef-inserted organisms were mainly Brachiopod and crinoid. Coral reef is punctiform or discontinuous banded in stratums, three kinds of types are identified by coral reef developing laws and distributional characteristics:clusters of vertical tubular coral, clusters of horizontal extension tubular coral and clusters of the top downward sloping tubular coral. According to biological content in rock, organic reef can be classified to coral skeletons limestone, coral grain limestone, biological granular limestone, containing biological granular limestone and micrite. In Early Carbonif-erous epoch in northeast margin of Qaidam Basin, the sedimentary environment is mainly carbonate platform while Late Carboniferous epoch it became tidal flat environments which was a transitional zone between marine and conti-nent. Organic reef in the study area is mainly located in the third or fourth section in Huaitoutala Formation of Lower Carboniferous. It developed good source rock and thick layer of oil sands, showing strong ability of hydrocarbon gener-ation and oil migration process.关键词
柴达木盆地东北缘/石炭系/生物礁/珊瑚/造礁生物Key words
northeast margin of Qaidam Basin/Carboniferous/organic reef/coral/reef-building organism分类
天文与地球科学引用本文复制引用
王志金,陈世悦,马帅,汪峰..柴达木盆地东北缘石炭系生物礁发育特征及其地质意义[J].沉积学报,2017,35(6):1177-1185,9.基金项目
中国地质调查局地质调查项目(12120115003301)[Geological Survey Project of China Geological Survey, No. 12120115003301] （12120115003301）
