| 滇东地区峨眉山地幔柱活动的沉积响应 |
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| 引用本文： | 吴鹏,刘少峰,窦国兴.滇东地区峨眉山地幔柱活动的沉积响应[J].岩石学报,2014,30(6):1793-1803. |
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| 作者姓名： | 吴鹏 刘少峰 窦国兴 |
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| 作者单位： | 中国地质大学地质过程与矿产资源国家重点实验室, 北京 100083;中国地质大学地球科学与资源学院, 北京 100083;中国地质大学地质过程与矿产资源国家重点实验室, 北京 100083;中国地质大学地球科学与资源学院, 北京 100083;中国煤炭地质总局地球物理勘探研究院, 涿州 072750 |
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| 基金项目： | 本文受国家重点基础研究发展计划项目（2011CB808901）和国家自然科学基金项目（41030318、91114203）联合资助. |
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| 摘 要： | 对滇东地区峨眉山玄武岩下伏茅口组灰岩进行地层对比表明，地幔柱上涌导致的隆升开始于茅口期，表现为茅口组同沉积过程中断层差异升降形成的水下隆升；而现今看到的茅口组的地层减薄正是水下隆升形成的沉积地层厚度差异和沉积后地表隆升剥蚀的共同结果，但沉积后隆升的规模远远小于前人估算的千米级别。会东大桥-普格-布拖一带发育的砾岩表明峨眉山玄武岩喷发的多期次性和砾岩的水下泥石流成因，根据其分布范围划定了第一期岩浆喷发之后滇东地区的抬升剥蚀以西昌-巧家断裂和普雄-普渡河断裂为东界。根据上述地质证据，总结了滇东地区二叠纪的构造-沉积演化模型。
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| 关 键 词： | 茅口灰岩 泥石流砾岩 小江断裂 地幔柱 滇东地区 |
| 收稿时间： | 2013/12/2 0:00:00 |
| 修稿时间： | 2014/1/10 0:00:00 |
Sedimentary response to Emeishan mantle plume in the eastern Yunnan Province |
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| WU Peng,LIU ShaoFeng and DOU GuoXing.Sedimentary response to Emeishan mantle plume in the eastern Yunnan Province[J].Acta Petrologica Sinica,2014,30(6):1793-1803. |
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| Authors: | WU Peng LIU ShaoFeng and DOU GuoXing |
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| Institution: | State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;School of Earth Science and Resources, China University of Geosciences, Beijing 100083;State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;School of Earth Science and Resources, China University of Geosciences, Beijing 100083;Research Institute of Coal Geophysical Exploration, China National Administration of Coal Geology, Zhuozhou 072750, China |
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| Abstract: | The stratigraphic comparison of the Maokou limestone below the Emeishan basalts in the eastern Yunnan Province demonstrate that uplift caused by Emeishan mantle plume started in Maokouan, and it appeared as the underwater uplift caused by the footwall uplifting during the syn-depositional normal faulting. The thinning of the Maokou limestone was the product of the initial depositional thickness difference by the underwater uplift and the post-depositional surface uplift and erosion, but the post-depositional uplift was much smaller than the kilometers-level. The conglomerates in Daqiao-Puge-Butuo area indicate the multiple eruptions of the Emeishan basalts and the debris flow deposits of the conglomerates; according to their distribution, the eastern boundary of the erosion scope was Xichang-Qiaojia fault and Puxiong-Pu Duhe fault. Based on these geological evidences, we summarized the model of the Permian tectonic-sedimentary evolution related with Emeishan mantle plume in the eastern Yunnan Province. |
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| Keywords: | Maokou limestone Debris flow conglomerates Xiaojiang fault Mantle plume Eastern Yunnan Province |
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