湘黔桂毗邻地区南华纪岩相古地理特征及地质意义  

Paleogeography Character and Geological Significance of Nanhua Period Lithofacies in Hu'nan-Guizhou-Guangxi Adjoining Area

作　　者：卢定彪 张德明 骆珊 吴开彬 龚桂源 王文明 LU Ding-biao;ZHANG De-ming;LUO Shan;WU Kai-bin;GONG Gui-yuan;WANG Wen-ming(Guizhou Geological Survey,Guiyang 550081,Guizhou,China)

机构地区：[1]贵州省地质调查院,贵州贵阳550081

出　　处：《贵州地质》2024年第1期9-17,共9页Guizhou Geology

基　　金：贵州省地质三维空间战略调查评价(2019-02号、DKJJ2020-01号)。

摘　　要：为了寻找连续完整且有研究价值的南华系剖面、推进南华系建系工作。本文依据对湘黔桂交界地区南华系主要剖面观察研究所获资料,以沉积岩相类型分析、分布特点为线索,划分出了12种沉积岩相类型,在此基础上反演南华纪各主要阶段古地理环境。得出:南华纪湘黔桂交界地区北西侧为古陆、南东侧为南华裂谷盆地,南华纪早晚两个冰期仅在古陆与盆地过渡的浅海地带,也就是现今的湘黔桂交界地区存在连续完整的沉积,连续完整的具研究价值的南华系剖面应在该区域寻找这一结论。The purpose of this article is to find a continuous,complete,and research-worthy Nanhuan section and to promote the establishment of its System.In this paper,based on the data obtained from the observation and research of the main sections of the Nanhuan in Hu’nan-Guizhou-Guangxi border area,the types of sedimentary facies and their distribution characteristics,12 types of sedimentary facies are classified.The paleogeographic environment of the main stages of the Nanhuan Period has been inverted from this.It is concluded that the northwestern part of the south China Yangtze area is paleocontinent and the southeast is the rift basin during the Nanhuan Period.The two glacial periods(beginning and ending)continuous and complete sedimentation existed only in the transitional shallow sea areas between paleocontinent and basin,that is,the current junction of Hunan Guizhou and Guangxi.The continuous and complete Nanhuan System section with research value can only be found in this area.

关 键 词：湘黔桂毗邻区 南华纪 沉积相 古地理 

分 类 号：P512.2[天文地球—地质学]