湖北鹤峰县杨家坪滑石矿地质特征及其成因探讨  

Geological characteristics and genesis discussion of Yangjiaping talc deposit in Hefeng County of Hubei

作　　者：赵军 李哲武 陈林 曹文胜 方喜林 ZHAO Jun;LI Zhewu;CHEN Lin;CAO Wensheng;FANG Xilin(Second Geological Brigade,Hubei Provincial Bureau of Geology,Enshi 445000,Hubei,China;Hubei Key Laboratory of Resources and Eco-environment Geology(Hubei Provincial Bureau of Geology),Wuhan 430034,Hubei,China)

机构地区：[1]湖北省地质局第二地质大队,湖北恩施445000 [2]资源与生态环境地质湖北省重点实验室(湖北省地质局),湖北武汉430034

出　　处：《矿产与地质》2023年第5期956-962,共7页Mineral Resources and Geology

基　　金：湖北省地质勘查基金项目“湖北省鹤峰县杨家坪矿区滑石矿详查”(编号:〔2020〕14号);“湖北省鹤峰县杨家坪矿区滑石矿预查”(编号:〔2018〕27号)共同资助。

摘　　要：湖北鹤峰县杨家坪滑石矿位于走马—东山峰背斜南西段之南东翼,是新发现的具有中型规模的滑石矿矿床。通过对滑石矿矿床地质特征及成因进行综合研究和分析,认为矿体赋矿层位为下震旦统陡山沱组三段中上部,分为黑滑石、白滑石两层矿,两者上下相距7~10 m,均呈似层状大致与围岩整合产出,矿石具沉积特征的鲕粒结构。矿石自然类型为块状滑石、片状滑石,黑滑石矿工业类型为白云石—滑石型,白滑石矿不具备工业价值。矿体特征、矿石成分、矿石结构特征以及稀土配分模式等共同表明,矿石为同生海相沉积成因,而矿石的片理化构造显示矿床叠加有后期的变质变形作用,矿床类型为沉积改造型滑石矿床。研究成果可为走马—东山峰背斜一带滑石矿进一步找矿和研究提供依据和支撑。Yangjiaping talc deposit in Hefeng County,Hubei Province is located in the southwest section of Zouma-Dongshanfeng anticline.It is a newly discovered talc deposit with medium scale.Through comprehensive research and analysis on the geological characteristics and genesis,it is considered that the hosted stratum of the ore body is the middle upper part of the third member of Doushantuo Formation of the Lower Sinian System.The orebody is divided into two layers of black talc and white talc,and there are 7 to 10 meters apart from each other.The two ore layers are generally produced in a stratoid manner in conformity with the surrounding rock.The ore has oolitic texture of sedimentary characteristics.The natural type of ore is massive talc and flaky talc.The industrial type of black talc ore is dolomite talc type.The white talc ore has no industrial value.The orebody characteristics,ore composition,ore texture characteristics and rare earth distribution model jointly show that the ore is of syngenetic marine sedimentary origin.The schistose structure of ore shows that the deposit is superimposed with later metamorphism and deformation,and the type of deposit is sedimentary modified talc deposit.The research result can provide a basis and support for further exploration and research of talc deposits in the Zouma Dongshanfeng anticline area.

关 键 词：杨家坪滑石矿 地质特征 矿产成因 湖北 

分 类 号：P619.253[天文地球—矿床学]