摘要
陕西省佛坪县朱家垭-石泉县水井沟一带锰矿成矿地质条件优越,找矿潜力大,但勘查程度尚浅。在研究区域基础地质和前人工作的基础上,通过野外地质调查、采样与测试分析等手段,研究了佛坪县朱家垭-石泉县水井沟一带锰矿矿床地质特征,探讨了矿床成因。研究结果表明:勘查区锰矿体主要赋存于寒武系下统一岩性段(∈^(1)_(1))含锰灰岩中,围岩为含锰灰岩及炭质片岩,矿体主要受层位和岩性控制。矿石中主要锰矿物为硬锰矿、软锰矿,少量水锰矿、褐锰矿。矿石自然类型为氧化锰矿石,是碳酸锰矿在地表氧化条件下形成的,其化学成分受原生矿石的制约,且具次生氧化作用的特征。矿床成因类型属于浅海相沉积-变质叠加表生氧化型碳酸锰矿床。
The manganese mineralization in the Zhujiaya,Foping County-Shuijingou,Shiquan County area of Shaanxi Province has excellent geological conditions and great mineral-finding potential,but the exploration is not deep enough.Based on regional basic geology and previous work,field geological surveys,sampling,and laboratory analyses are employed to study the geological characteristics of the manganese deposit and explore its genesis in the area.The results show that the manganese ore bodies in the exploration area are mainly hosted in the manganese-bearing limestone of the Lower Cambrian(∈^(1)_(1)).The country rocks are manganese-bearing limestone and carbonaceous phyllite,and the ore bodies are mainly controlled by stratigraphic position and lithology.The main manganese minerals in the ore are romanechite and pyrolusite,with minor amounts of rhodochrosite and manganite.The ore is of the oxide-manganese type,formed by the oxidation of carbonate manganese ore under surface conditions.Its chemical composition is constrained by the protore and has the characteristics of secondary oxidation.The deposit genesis is considered to be a shallow-marine sedimentary-metamorphic and superimposed oxide-carbonate manganese deposit.
作者
吴启慧
柳国良
WU Qihui;LIU Guoliang(First Geological Survey Institute of the Bureau of Geology of the Metallurgical Industry of China,Sanhe,Hebei 065201,China)
出处
《中国锰业》
2025年第1期50-55,共6页
China Manganese Industry
关键词
陕西
锰矿
地质特征
表生氧化
矿床成因
Shaanxi
manganese ore
geological characteristics
supergene oxidation
deposit genesis
