中亚造山带南缘玉石山锰矿成矿作用及成矿模式研究  

On Metallogenesis and Metallogenic odel of Yushishan Manganese Deposit in Southern Margin of Central Asia Orogenic Belt

作　　者：郭志伟 赵丙刚 李智斌 孙金龙 齐云飞 和越 赵迪 GUO Zhiwei;ZHAO Bingang;LI Zhibin;SUN Jinglong;QI Yunfei;HE Yue;ZHAO Di(The 8th Geological Brigade of Hebei Bureau of Geology and Mineral Exploration and Development,Qinhuangdao,Hebei 066001,China;Hebei Marine Geological Resources Survey Center,Qinhuangdao,Hebei 066001,China)

机构地区：[1]河北省地质矿产勘查开发局第八地质大队,河北秦皇岛066001 [2]河北省海洋地质资源调查中心,河北秦皇岛066001

出　　处：《中国锰业》2023年第1期22-26,31,共6页China Manganese Industry

摘　　要：玉石山锰矿位于塔里木板块东北缘活动带,形成于苦泉—玉石山—大红山—马鬃山断陷海盆。根据碳、氧同位素分析,δ^(13)C_(PDB)值具有较大的负值,δ^(18)O_(SMOW)值低于现代海相石灰岩,推测该矿锰物质,一部分来自陆源,另一重要来源于与海底远火山活动有关的含锰热水喷流作用。通过与周边岩体成岩时期对比及矿床成因分析,认为玉石山锰矿自震旦—寒武纪沉积成矿,经历了加里东左旋剪切变形和志留纪热接触变质作用后,在原生的含锰矿层,又经历大气降水的风化作用,锰质沿着构造裂隙搬运、充填,在适当构造地段富集成矿,现表现为典型的淋滤型锰矿床。Yushshan manganese ore is located in the active belt of the northeastern margin of Tarim plate, formed in Gankuquan, Yushishan, Dahongshan and Mamanshan fault basin. According to the analysis of carbon and oxygen isotopes, that δ^(13)CPDBvalue is of a larger negative value, δ^(18)OSMOWvalue is lower than that of modern marine limestone. It is inferred that the manganese material in the ore is partly from terrestrial source. Another important source is the hydrothermal effusion of manganese, which is related to remote volcanic activity in the seabed. By contrast with surrounding rock diagenesis period and the deposit genesis analysis, the sedimentary mineralization of jade mountain manganese ore was from simian to Cambrian period. After experiencing Caledonian sinistral shear deformation and Silurian thermal contact metamorphism. In native containing manganese ore layer, it also experienced atmospheric precipitation of weathering, manganese is along to the tectonic fissures handling and filling, and enriching to mineralization in the appropriate section structure. It is a typical leaching type manganese deposit.

关 键 词：北山含锰岩系 玉石山锰矿 C-O同位素 矿床成因 

分 类 号：P618.32[天文地球—矿床学]