滇中地区因民角砾岩类型、特征及找矿意义  

The Yinmin breccia types,characteristics and prospecting significance in Central Yunnan

作　　者：刘军平 宛胜 戴启 田素梅 赵江泰 吴嘉林 LIU Junping;WAN Sheng;DAI Qi;TIAN Sumei;ZHAO Jiangtai;WU Jialin(Yunnan Institute of Geological Survey,Kunming,650216;School of Earth Science and Resources,China University of Geosciences,Beijing,100083;Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization,MNR,Kunming,650051;Geological Survey of Jiangxi Province,Nanchang,330000;Yunnan Provincial Geological Engineering Survey Corporation,Kunming,650216)

机构地区：[1]云南省地质调查院,昆明650216 [2]中国地质大学地球科学与资源学院,北京100083 [3]自然资源部三江成矿作用及资源勘查利用重点实验室,昆明65051 [4]江西省地质调查院,南昌330000 [5]云南省地质工程勘察总公司,昆明650216

出　　处：《地质论评》2021年第6期1619-1628,共10页Geological Review

基　　金：云南省国土资源厅基金项目“云南省1∶5万撒马基幅、因民幅、贵城幅、舒姑幅区域地质调查(编号:D201905)”;中国地质调查局项目“云南省系列地质图件数据处理与洋板块地质研究”(编号:DD20190370)的成果。

摘　　要：滇中地区"因民角砾岩"的成因及归属问题目前暂无定论。笔者通过对东川—易门地区前人所划的因民组"因民角砾岩"进行1∶50000野外地质调查工作,对其进行了初步的分类。根据其成因及时代划分为复成分砾岩、冰碛砾岩、滑塌角砾岩、隐爆角砾岩和构造角砾岩。对"因民角砾岩"成因及时代的研究,特别是"冰碛砾岩、复成分砾岩"的提出,对于解决滇中早前寒武纪地层层序、时代归属、构造格架、大地构造位置及大区域地层对比,探讨滇中元古宙地史演化、古环境研究以及指导找矿都具有重要的指示意义。Objectives: The author conducted a 1 ∶ 50000 field geological survey of the Yinmin breccia,which was drawn by the predecessors in the Dongchuan—Yimen area,and made a preliminary classification.Results: According to its genesis and age,it is divided into compound conglomerate,glacial conglomerate,slump breccia,detonation breccia and structural breccia.Conclusions: The research on the genesis and age of " Yinmin breccia",especially the proposal of " icicle conglomerate and compound conglomerate ", is useful for solving the early and pre-Cambrian stratigraphic sequence,age, structural framework, The location of the geotectonic structure and the comparison of the stratigraphy in a large area,the exploration of the evolution of the Proterozoic geological history in Central Yunnan,the study of the paleoenvironment,and the guidance of ore prospecting are all important indicators.

关 键 词：因民角砾岩 冰碛砾岩 复成分砾岩 因民组 滇中地区 

分 类 号：P612[天文地球—矿床学]