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Geoscience ›› 2023, Vol. 37 ›› Issue (05): 1089-1099.DOI: 10.19657/j.geoscience.1000-8527.2023.043

• Structural Geology • Previous Articles     Next Articles

Advances on the Understanding in the Emeishan Mantle Plume and Dynamic Mechanism of the Permian Sichuan Basin Formation

SUN Ziming(), BIAN Changrong, LIU Guangxiang   

  1. SINOPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China
  • Received:2023-02-10 Revised:2023-04-11 Online:2023-10-10 Published:2023-11-14

Abstract:

In recent years, significant research progress has been made on the Emeishan Large Igneous Province (ELIP) and its genetic mechanism of mantle plume, but the scope of the mantle plume on the Sichuan Basin and the dynamic mechanism for the Permian sedimentary basin formation remain unclear.Based on a number of literature research and recent studies, and the idea that deep mantle activity controls the evolution of crustal surface system, the characteristics of Emeishan LIP and its deep geology are systematically reviewed.It is recognized that the mantle plume is the dominant factor that induces the large-scale eruption of the Emeishan basalts and formed the LIP, and has direct influence on some parts of the Sichuan Basin, which is manifested by the differential denudation of the top Middle Permian Maokou Formation.This was likely caused by the upwelling of mantle plume and its control on the Permian sedimentation and sedimentary facies distribution in the central-southern part of the basin.Formation of the extensional troughs, and the alternating high-and-low sedimentary-tectonic framework in the central-northern Sichuan Basin during the Permian to Early Triassic may have been mainly controlled by the extension of the southern Qinling Ocean.

Key words: Emeishan basalt, large igneous province (LIP), mantle plume, Permian, dynamic mechanism, Sichuan Basin

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