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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, 胡林, 肖进, 李宁, 伊海生, 赵宇. 2021. 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, 48(6): 1781-1789. doi: 10.12029/gc20210610
引用本文: 徐琳, 胡林, 肖进, 李宁, 伊海生, 赵宇. 2021. 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, 48(6): 1781-1789. doi: 10.12029/gc20210610
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XU Lin, HU Lin, XIAO Jin, LI Ning, YI Haisheng, ZHAO Yu. 2021. Conodont biostratigraphic division of Lower Permian-Lower Triassic carbonate rocks in Cuoqin Basin, Tibet[J]. Geology in China, 48(6): 1781-1789. doi: 10.12029/gc20210610
Citation: XU Lin, HU Lin, XIAO Jin, LI Ning, YI Haisheng, ZHAO Yu. 2021. Conodont biostratigraphic division of Lower Permian-Lower Triassic carbonate rocks in Cuoqin Basin, Tibet[J]. Geology in China, 48(6): 1781-1789. doi: 10.12029/gc20210610
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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

  • 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

  • 基金项目:
    中国地质调查局项目（DD20160160）资助
详细信息
    作者简介: 徐琳, 男, 1986生, 硕士, 高级工程师, 从事区域地质调查工作; E-mail: 664998491@qq.com
    通讯作者: 胡林, 男, 1986生, 学士, 工程师, 从事区域地质调查工作; E-mail: 276487709@qq.com

  • 中图分类号: P534.46;P534.51

Conodont biostratigraphic division of Lower Permian-Lower Triassic carbonate rocks in Cuoqin Basin, Tibet

  • 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

  • Fund Project: Supported by the project of China Geological Survey(No. DD20160160)
More Information
    Author Bio: XU Lin, male, born in 1986, master, senior engineer, engaged in regional geological survey; E-mail: 664998491@qq.com .
    Corresponding author: HU Lin, male, born in 1986, bachelor, engineer, engaged in regional geological survey; E-mail: 276487709@qq.com

    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。

    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.

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  • 图 1  研究区地质简图

    Figure 1. 

    下载: 全尺寸图片 幻灯片

    图 2  织弄剖面中牙形石在地层中的分布

    Figure 2. 

    下载: 全尺寸图片 幻灯片

    图 3  织弄剖面的牙形石显微照片（线比例尺长度代表100 μm）

    Figure 3. 

    下载: 全尺寸图片 幻灯片
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收稿日期:  2019-03-05
修回日期:  2019-05-06
刊出日期:  2021-12-25

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