文献类型：期刊文献

中文题名：湘渝黔红色岩溶地貌形成的地质条件及成因分析

英文题名：Geological conditions and genesis of red karst landforms in Hunan-Chongqing-Guizhou

作者：陈友智 姜伏伟 于宁 苏孝良 曹晓娟

第一作者：陈友智

机构：[1]贵州理工学院资源与环境工程学院,贵州贵阳550003;[2]贵州省科学技术厅,贵州贵阳550002;[3]中国地质调查局环境监测院,北京100089

第一机构：贵州理工学院资源与环境工程学院

年份：2023

卷号：52

期号：1

起止页码：94-104

中文期刊名：地球化学

外文期刊名：Geochimica

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：中国地质调查局项目(DD20190074);贵州省科技计划项目(黔科合JZ字[2015]2005);贵州理工学院高层次人才科研启动(XJGC20190643)联合资助。

语种：中文

中文关键词：红色岩溶地貌;劈理;节理;成因;雪峰隆起

外文关键词：red karst landform;cleavage;joint;genesis;Xuefeng Uplift

摘要：湘渝黔交界处红色岩溶地貌为新发现的特殊岩溶地貌,以地层凹凸相间排列和单层蜂窝状形态为明显特征。古生代–新生代研究区处于黔中隆起和雪峰隆起北缘,地层沉积岩相和构造变形受到隆起的影响。目前,关于红色岩溶地貌与隆起的关系未见深入研究。针对这一问题,基于野外露头观测、显微结构分析和元素地球化学分析,从构造变形的角度探讨隆起与红色岩溶地貌之间的因果关系。结果表明,加里东期牯牛潭组形成于干燥、炎热的气候环境,黔中–雪峰隆起的发育影响了沉积水体盐度以及地层中黏土矿物含量,限定了地貌发育区域和基本形态格架;晚印支–早燕山期受雪峰隆起向北西推覆的影响,形成NE向劈理,劈理多沿准同生期“龟裂纹”构造薄弱带发育,劈理与缝合线组合共同围限石灰岩砾石,后期地下水差异溶蚀形成蜂窝状;晚燕山–新构造期雪峰隆起持续向北逆冲,研究区以隆升、剥蚀为主,形成多组共轭节理,红色岩溶地层抬升至近地表,地下水沿节理侵蚀,最终形成红色岩溶地貌。
There are newly discovered red karst landforms in the Tri-Province area of Hunan, Chongqing, and Guizhou provinces. The strata is characterized by an alternate arrangement with concave, convex, and mono-layered honeycomb morphology. The Paleozoic-Cenozoic study area is located on the northern margin of the Central Guizhou Uplift and Xuefeng Uplift, and the stratigraphic sedimentary facies and structural deformation have been affected by the uplift. To date, no extensive studies have been conducted on the relationship between the red karst landforms and uplift. This study aims to examine this relationship and determine the genetic relationship between uplift and red karst landforms from the perspective of tectonic deformation through outcrop observation,microstructure analysis, and element geochemical analysis. The results have shown that the Caledonian Guniutan Formation was formed in a dry and hot climatic environment, and the development of the Central Guizhou-Xuefeng Uplift influenced the change in salinity of sedimentary water and clay mineral content of the strata and limited the development area and basic morphological framework. During the late Indosinian and early Yanshanian epochs,the NE cleavages were formed from the impact of the NW nappe of the Xuefeng Uplift. Most of the cleavages developed along a weak belt of pene-sedimentary turtle crack structure. The combination of cleavages and stylolites confined the carbonate gravel, and the different dissolutions later formed the honeycomb. In the late Yanshan-Neotectonic period, the Xuefeng Uplift continued to thrust northward. The study area was dominated by uplifts and denudation, forming several sets of conjugate joints. Following this, the red karst strata were uplifted to the adjacent surface, and the groundwater eroded along the joints, resulting in the formation of these landforms.