北祁连西段黑峡口锰矿地球化学特征及成因研究  

Geochemical Characteristics and Genesis of Hexiakou Manganese Deposit in the Western Section of North Qilian Mountains

作　　者：周亚丽 潘泽 李晓姣 韩姗姗 张盛亚 乔海霞 ZHOU Yali;PAN Ze;LI Xiaojiao;HAN Shanshan;ZHANG Shengya;QIAO Haixia(The 7th Geological Brigade of Henan Non-ferrous Metals Geology and Mineral Bureau,Zhengzhou,Henan 450000,China)

机构地区：[1]河南省有色金属地质矿产局第七地质大队,河南郑州450000

出　　处：《中国锰业》2023年第1期52-56,共5页China Manganese Industry

摘　　要：黑峡口锰矿床位于北祁连西段寒武—奥陶纪裂谷带,系晋宁期华北古板块裂解所形成的裂谷带,矿石地球化学特征表明,该矿床属热水沉积的产物。寒武纪时期黑峡口锰矿受古海底拉张断裂控制的火山喷气(液),以及深成热水作用形成的与火山沉积建造密切共生的海底热水沉积矿床作用。后经次生改造,使含锰岩系褶皱上升地表,部分锰质被淋滤,迁移,形成北祁连造山带中的锰矿成矿带。成矿带东西长约450 km,西段南北宽30 km,东段南北宽25 km,总体呈一个三角形展布格局。Hexiakou manganese deposit is located in the Cambrian-Ordovician rift zone in the western part of north Qilian, which was formed by the cracking of the north China plate during The Jinning Period. The ore geochemical characteristics show that the deposit is a product of hydrothermal deposition. During the Cambrian period, Hexiakou manganese deposit was controlled by volcanic exhalation(liquid) in paleoseafloor tension fault and submarine hydrothermal deposit, which was formed by hypogenetic hydrothermal process closely symbiotic with volcanic sedimentary construction. After the secondary transformation, the manganese bearing rock series fold rose to the surface. Part of manganese was leached and migrated, forming the manganese ore belt in the north Qilian orogenic belt, which is about 450 km long from east to west, 30 km wide from north to south, 25 km wide from north to south. It generally presents a triangular distribution pattern.

关 键 词：北祁连西段 寒武—奥陶纪裂谷带 地球化学 热水沉积 

分 类 号：P618.32[天文地球—矿床学]