| 引用本文: | 徐琳,胡林,肖进,李宁,伊海生,赵宇. 西藏措勤盆地下二叠统—下三叠统碳酸盐岩牙形石生物地层划分[J]. 中国地质, 2021, 48(6): 1781-1789. |
| XU Lin,HU Lin,XIAO Jin,LI Ning,YI Haisheng,ZHAO Yu. Conodont biostratigraphic division of Lower Permian-Lower Triassic carbonate rocks in Cuoqin Basin, Tibet[J]. Geology in China, 2021, 48(6): 1781-1789(in Chinese with English abstract). |
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| 西藏措勤盆地下二叠统—下三叠统碳酸盐岩牙形石生物地层划分 |
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徐琳1, 胡林1, 肖进1, 李宁1, 伊海生2, 赵宇3
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1.四川省地质矿产勘查开发局川西北地质队, 四川 绵阳 621000;2.成都理工大学沉积地质研究院, 四川 成都 610059;3.西藏自治区地质矿产勘查开发局第六地质大队, 西藏 拉萨 851400
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| 摘要: |
| 措勤盆地下二叠统昂杰组之上广泛发育碳酸盐岩沉积，前人先后对这套碳酸盐岩进行了解体，建立了多个地层单元。本次报道剖面为盆地中的二叠系-三叠系的连续整合沉积剖面，通过牙形石研究在这套碳酸盐岩中识别出了下二叠统-下三叠统的5个牙形石带，即：Mesogondolella siciliensis-Sweetognathodus subsymmetricus带、Mesogondolella idahoensis带、Jingondolella aserrata带、Clarkina meishanensis带、Neospathodus dieneri带，并将下拉组时代修订为下二叠统空谷期-中二叠统末。 |
| 关键词: 下拉组 桑穷组 文布当桑组 嘎仁错组 牙形石 地质调查工程 措勤盆地 西藏 |
| DOI：10.12029/gc20210610 |
| 分类号:P534.46;P534.51 |
| 基金项目:中国地质调查局项目（DD20160160）资助。 |
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| Conodont biostratigraphic division of Lower Permian-Lower Triassic carbonate rocks in Cuoqin Basin, Tibet |
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XU Lin1, HU Lin1, XIAO Jin1, LI Ning1, YI Haisheng2, ZHAO Yu3
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1.Northwest sichuan geological team, Sichuan bureau of exploration and development of geology and mineral resources, Mianyang 621000, Sichuan, China;2.Institute of sedimentary geology, chengdu university of technology, Chengdu 610059, Sichuan, China;3.The sixth geological brigade of the bureau of geology and mineral exploration and development of the Tibet autonomous region, Lhasa 851400, Tibet, China
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| Abstract: |
| Carbonate sediment is widely developed above Lower Permain Angjie Formation in Coqin basin,which was disintegrated by previous research to establish several formations. Five conodont zones of Lower Permian-Lower Triassic were identified in the carbonate rocks through conodont studies, namely Mesogondolella siciliensis -Sweetognathodus subsymmetricu zone, Mesogondolella idahoensis zone, Jingondolella aserrata zone, Clarkina meishanensis zone, Neospathodus dieneri zone, and the stratigraphic age of the Xiala Formation was constrained at Lower Permian Kungurian-the later of Middle Permian. |
| Key words: Xiala Formation Sangqiong Formation Wenbudangsang Formation Garencuo Formation Conodont geological survey engineering Coqen Basin Tibet |
