Sedimentary Features and Paleogeographic Evolution of the Middle Permian Trough Basin in Zunyi,Guizhou,South China  

作　　者：Zhichen Liu Qi Zhou Ke Liu Yang Wang Deng Chen Yunming Chen Lin Xiao 

机构地区：[1]School of Resource and Environmental Engineering,Guizhou University,Guiyang 550003,China [2]State Key Laboratory of Biogeology and Environmental Geology,School of Earth Sciences,China University of Geosciences,Wuhan430074,China [3]102 Geological Party,Guizhou Bureau of Geology and Mineral Exploration and Development,Zunyi 563099,China [4]Innovation Center of Ore Resources Exploration Technology in the Region of Bedrock,Ministry of Natural Resources,Guiyang 550004,China [5]Guizhou Bureau of Geology and Mineral Exploration and Development,Guiyang 550004,China

出　　处：《Journal of Earth Science》2023年第6期1803-1815,共13页地球科学学刊（英文版）

基　　金：supported by the Young Talent Funding of Guizhou Province(No.2019-5654);the China Geological Survey(CGS)(No.DD20190159-16);the Guizhou Science Innovation Team Project(No.2018-5618);the Natural Science Funding of Guizhou(Nos.2019-2868 and 2019-2951);the Research Funding of Guizhou Bureau of Geology and Mineral Exploration and Development(No.2016-3);the Bureau of Geology and Mineral Resources Exploration and Development Major Research Project of Guizhou Province(Guizhou Geology and Mining Sci-Coop[2021]03);the Science and Technology Plan Projectof Guizhou Province(Guizhou Sci-Zhongyindi No.[2021]4027);the Prospecting Breakthrough Strategic Action Major Collaborative Innovation Project of Guizhou Province(No.2022[ZD003]).

摘　　要：Based on detailed field surveys,numerous sections and drillcores as well as analyses of lithofacies and sedimentary facies,sedimentary differentiation in the Middle Permian Zunyi(northern Guizhou,South China)trough basin was studied in detail.Caused by activities of the Emeishan mantle plume,the regional extensional setting and the extinguishing of carbonate production factories were shown from Guizhou to Yunnan.Three types of sedimentary enironments were developed in the study area:platform,slope,and basin.In this work,we established a sedimentary model for the study area,identified 14 syndepositional faults,and created the detailed reconstruction of the trough basin via a sedimentological investigation.It is found that the paleogeographic evolution of the study area can be divided into six stages:(1)a pre-rifting stage,(2)rapid rifting and subsidence,(3)stable rifting and subsidence,(4)the second stage of rifting and subsidence,(5)silicification,and(6)regional uplift and denudation.The sedimentary features and paleogeographic evolution of the Maokou Formation in Zunyi show that the platform,slope,and basin sedimentary features coexisted.In addition,the extensional setting and extinguishing of carbonate production factories were important preconditions for the evolution of the platform region in the study area,and the activity of syndepositional faults also played an important role in the paleogeographic evolution of this area.

关 键 词：Permian Maokou Period Zunyi Guizhou Province trough basin paleogeographic evo-lution sedimentary rocks deposits South China 

分 类 号：P612[天文地球—矿床学]