| 西藏措勤盆地晚侏罗世牛津期—基默里奇期沉积环境及油气勘探意义 |
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| 关键词:Tibet Coqen Basin Late Jurassic paleogeographic characteristics gas and oil potential |
| 基金项目:国家自然科学基金项目(编号: 41472030);科技基础性工作专项(编号: 2015FY310100);中国地质调查局基础性公益性矿产地质调查项目(编号: DD20160120-02; DD20160120-04; DD20160126);中国地质科学院基本科研业务费项目(编号: J1607) |
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| Sedimentary Environment and Hydrocarbon Exploration of the Lat Jurassic Oxfordian–Kimmeridgian Strata in the Coqen Basin, Tibet |
| The Late Jurassic palaeogeographic pattern of the Coqen Basin, for a long time, has been considered as “land in the south, sea in the north”, namely, it is a continental environment in the southern basin but a large area of clastic rock facies offshore-slope environment in the northern basin. In recent years, however, Late Jurassic carbonate formation has been found, which is several hundred to more than one thousand meter thick, in Rendo area of Zhongba County, Xiongmei area of Xainza County, Baoji area of Bange County within the basin and Wuma area of Gaize County, and Duoma area of Shuanghu County in the adjacent area to the north of the basin. The discovery of these strata indicates that the southern part of the basin is not the ancient land, and the northern part of the basin is not a large area of clastic rocks. In Late Jurassic Oxfordian–Kimmeridgian period, it did not tend to become deeper from the south to the north in the basin; on the opposite, it was a vast carbonate platform in the north, and became deeper to slope in the south. In Late Jurassic Oxfordian–Kimmeridgian period the extensive carbonate sedimentary environment provided favorable conditions for the growth and reproduction of reefs in the Coqen Basin. Therefore, Late Jurassic Oxfordian–Kimmeridgian reef should have had a wide distribution, which indicates good oil and gas potential in the Coqen Basin. |
| MENG Ya-zhou,JI Zhan-sheng,WU Gui-chun,SUN Qian,SHI Qiu-yuan,LI Hao.2018.Sedimentary Environment and Hydrocarbon Exploration of the Lat Jurassic Oxfordian–Kimmeridgian Strata in the Coqen Basin, Tibet[J].Acta Geoscientica Sinica,39(4):445-452. |
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