地学前缘 ›› 2011, Vol. 18 ›› Issue (3): 201-210.

• 论文 • 上一篇    下一篇

峨眉山地幔柱沉积构造演化及沉积响应

王瑞华，谭钦银，付建元，牟传龙，程锦翔，王正和   

  1. 1. 成都地质矿产研究所， 四川 成都 610082
    2. 川庆钻探工程有限公司 地球物理勘探公司， 四川 成都 610213
  • 收稿日期:2010-11-25 修回日期:2011-03-28 出版日期:2011-05-22 发布日期:2011-05-20
  • 作者简介:王瑞华（1976—），女，硕士，工程师，储层沉积学专业。Email：ruihua.w@163.com 峨眉山地幔柱沉积构造演化及沉积响应
  • 基金资助:

    中国地质调查局项目“中上扬子重点地区沉积与油气地质条件研究”（1212011120969）

The sedimentarytectonic evolution and sedimentary response of mantle plume in Emeishan.

  1. 1. Chengdu Center of China Geological Survey， Chengdu 610082， China
    2. Geophysical Prospecting Company of Chuanqing Drilling Engineering Company, Chengdu 610213, China
  • Received:2010-11-25 Revised:2011-03-28 Online:2011-05-22 Published:2011-05-20

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摘要：

中、晚二叠世上扬子区发生了一次规模巨大的峨眉山地幔柱事件，该事件的火山产物为峨眉山玄武岩。峨眉山地幔柱事件的沉积与构造演化、火山活动过程中的沉积特征及沉积响应等研究表明，峨眉山地幔柱经历了岩浆深部活动、火山穹窿形成、火山喷发及地壳下沉等多个阶段。地幔柱除造成火山喷发外，还引发了很多与之相关的重要事件，如火山穹窿形成、地震、海啸及热液活动等，造成的沉积响应有沉积物同生滑动、热液沉积及风暴沉积等。其中，茅口组疙瘩状团块灰岩及其相关特征是沉积物同生滑动的结果，茅口组—长兴组中的燧石是岩浆分异的热液沉积，茅口组地层中的泥质及其中粗碎屑为风暴沉积。茅口组及吴家坪组杂乱沉积与地震活动有关，或许可以称之为“震积岩”。

关键词: 峨眉山地幔柱, 玄武岩, 火山活动, 沉积响应

Abstract:

In the MiddleLate Permian, a large scale of mantle plume event in Emeishan took place in the UpperYangtze region and the volcanic product of the event was Emeishan Basalt. The sedimentarytectonic evolution of mantle plume in Emeishan, and sedimentary characteristics and sedimentary responses of volcanic activity were studied. Mantle plume in Emeishan is considered to have undergone the stages of deep magmatic activity, volcanic dome, volcanic eruption, crustal subsidence, etc. Mantle plume also caused other correlative important events such as volcanic dome, earthquake, tsunami and hydrothermal activity, and  its sedimentary responses included syngenetic deposit sliding, hydrothermal deposit and storm deposit. Therefore, the lump limestones of Maokou Formation and their characteristics are the results of syngenetic deposit sliding, the flints of Maokou FormationChangxing Formation are hydrothermal deposits of magmatic differentiation, and the mud and megaclast in the Maokou Formation is the result of storm deposit. Disorderly deposits of Maokou Formation and Wujiaping Formation are related to earthquake activities, which may be called  seismite.

Key words: mantle plume in Emeishan; basalt; volcanic activity; sedimentary response

Key words:  mantle plume in Emeishan, basalt, volcanic activity, sedimentary response

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