摘要
源-汇沉积系统(S2S)通过沉积路径将侵蚀地貌区与沉积地貌区进行有机联系,通过沉积物从源到汇的传输和存储将侵蚀地貌演化转变为地质历史记录。本文在简述源-汇沉积体系地貌侵蚀研究的基础上,全面总结了华南西部晚二叠世的源-汇沉积体系研究进展。该源-汇沉积体系的沉积物来源于峨眉山大火成岩省的风化侵蚀,向东南输送并堆积于右江盆地的不同沉积环境,保存了完整的从陆相、滨-浅海相到深水盆地相的沉积序列。利用陆相宣威组的沉积学和沉积物源分析,完善了该源-汇沉积体系,进一步明确了吴家坪中期的华南西部侵蚀地貌演变及其驱动机制;通过宣威组下段含矿岩系的详细沉积学分析,建立了冲积扇-湿地沉积相组合模式,厘定了吴家坪早期的风化-沉积成矿效应。
The source-to-sink(S2S)sedimentary system links the erosional geomorphic area with the sedimentary geomorphic area through sedimentary path and transforms the erosional geomorphic evolution into the geological historical record through the transport and accumulation of sediments from source to sink.Based on the brief discription of researches on the geomorphic erosion in the S2S system,we have completely summarized the research progresses of the late Permian S2S sedimentary system in the western South China.Detrital sediments of this Late Permian S2S sedimentary system were mainly sourced from the weathering and erosion of rocks in the Emeishan large igneous province and then were transported southeastward into the Youjiang Basin,and deposited in various sedimentary environments of the basin in which a complete sedimentary sequence from terrestrial facies,coastal-shallow marine facies and deep-water basin facies was preserved.Based on the sedimentology and sedimentary provenance analysis of the terrestrial Xuanwei Formation,we have improved the S2S sedimentary system and further confirmed the evolution of erosional landforms of the western South China and its driving mechanism during the middle Wuchiapingian age.Through detailed sedimentological analysis of ore-bearing successions in the lower part of the Xuanwei Formation,we have established the alluvial fan-wetland sedimentary facies association model and determined the early Wuchiapingian weathering-sedimentary mineralization effect.
作者
杨江海
王彪
黄庆
王茂德
陈波
周寅生
邓旭升
覃永军
YANG Jiang-hai;WANG Biao;HUANG Qing;WANG Mao-de;CHEN Bo;ZHOU Yin-sheng;DENG Xu-sheng;QIN Yong-jun(School of Earth Sciences,China University of Geosciences(Wuhan),Wuhan 430074,China;Brigade 113,Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Liupanshui Guizhou 553000,China;Guizhou Geological Survey,Guiyang 550081,China;Bureau of Geology and Mineral Exploration and Development Guizhou Province,Guiyang 550000,China)
出处
《矿物岩石地球化学通报》
北大核心
2025年第5期1008-1022,I0003,共16页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金资助项目(42122015,42472148)。
关键词
源-汇沉积体系
侵蚀地貌
宣威组
晚二叠世
沉积矿床
source-to-sink
erosional landform
Xuanwei Formation
Late Permian
sedimentary deposit
作者简介
第一作者:杨江海(1984-),男,中国地质大学(武汉)教授,博士生导师。中国地质学会沉积地质专业委员会委员,《沉积学报》执行副主编和Journal of Palaeogeography编委。主要从事地表过程的源-汇沉积体系演化及其资源环境效应研究。获得国家自然科学基金委青年基金、面上基金、优秀青年科学基金和国家重点研发计划等国家级项目资助,以第一作者/通信作者在NSR、Geology、EPSL、JGR-Solid Earth等期刊上发表论文50余篇。获第二届中国孙枢奖和第20届侯德封矿物岩石地球化学青年科学家奖。研究方向:沉积地质学.email:yangjh@cug.edu.cn。
