鄂东北鹰咀山锰矿床的矿物学与地球化学:对矿床成因的指示  

Mineralogy and geochemistry of the Yingzishan manganese deposit in the northeastern Hubei, China: An indication for the genesis of the deposit

作　　者：代吉祥 陈松林 陈松 刘兴平 邹院兵 杨振[3] 刘锐[3] DAI Ji-xiang;CHEN Song-lin;CHEN Song;LIU Xing-ping;ZOU Yuan-bing;YANG Zhen;LIU Rui(Sixth Geological team of Hubei Geological Bureau,Xiaogan 432000,China;Geological Exploration Fund Management Center of Hubei Province,Wuhan 430071,China;School of Earth Resources,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]湖北省地质局第六地质大队,湖北孝感432000 [2]湖北省地质勘查基金管理中心,湖北武汉430071 [3]中国地质大学(武汉),湖北武汉430074

出　　处：《矿物学报》2022年第4期503-515,共13页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(编号:41002025);中央高校基本科研业务费专项资金(编号:CUGL140406);湖北省国土资源厅省地质勘查基金项目(编号:HBT-16170054-170534)。

摘　　要：鄂东北地区红安群地层里广泛发育锰矿床(如鹰咀山、四方山-团山沟和孙冲等锰矿床),目前对该类锰矿床的成因研究相对较为薄弱。本文以鄂东北地区鹰咀山锰矿床为研究对象,在详细论述其矿床地质特征基础上,对其进行矿物学及地球化学研究,认为鹰咀山锰矿床属于沉积变质型锰矿床。其形成后经抬升剥蚀至地表,遭受了表生氧化作用。锰成矿过程可分为3个期次:第1期为沉积成岩成矿期,锰矿物由菱锰矿、锰方解石及锰白云石组成;第2期为变质改造期,锰矿物主要由重结晶菱锰矿、黑锰矿及锰铝榴石等矿物组成;第3期为表生氧化期,锰矿物则主要由硬锰矿、软锰矿及锰钡矿等矿物组成。鹰咀山锰成矿物质来源应主要来自火山喷发和海底热液喷流作用。Manganese deposits(such as the Yingzuishan, Sifangshan-Tuanshangou and Sunchong manganese deposits)are widely developed within the Hong’an Group in the northeastern Hubei. However, the researches on metallogenesis of these manganese deposits are relatively limited. Based on the detailed description of geological characteristics of the Yingzuishan manganese deposit, which was selected as the research object, in the northeastern Hubei, mineralogical and geochemical studies have been carried out in this paper. It is believed that the Yingzishan manganese deposit belongs to the sedimentary-metamorphic manganese deposit. After its formation, it was uplifted and denuded to the surface, and then it was influenced by the supergene oxidation. Three stages of manganese mineralization have been identified in the deposit. The first ore-forming stage is the sedimentary and diagenetic metallogenic stage, with manganese minerals including rhodochrosite, manganese calcite, and manganese dolomite. The second ore-forming stage is the metamorphism and transformation stage, with major manganese minerals of recrystallized rhodochrosite, hausmannite, and spessartite.The third ore-forming stage is the supergene oxidation stage, with major manganese minerals of psilomelane, pyrolusite,and hollandite. The ore-forming materials of the Yingzuishan deposit should be mainly sourced from volcanic eruption and submarine hydrothermal exhalation.

关 键 词：锰矿床 矿物学 地球化学 矿床成因 鹰咀山 鄂东北 

分 类 号：P57[天文地球—矿物学] P611[天文地球—地质学]