北祁连石照子锰矿矿床地质特征及成矿规律研究

A Study on Geological Characteristics and Metallogenic Regularity of Shizhaozi Manganese Deposit in North Qilian

研究区位于华北板块与柴达木板块的碰撞带上,而华北板块南缘地壳在经历“开裂”和“俯冲”的构造活动中,为热水喷流沉积作用形成矿床提供了极为有利的地质构造环境。通过对石照子锰矿的成矿规律研究,认为该锰矿主要是白银厂铜多金属硫化物热泉成矿作用的延续产物,成矿空间主要分布于古火山机构块状隆起的边缘,而白银矿田矿床的分布则在古火山机构块状隆起的中心部位,矿床垂向分布特征是:顶部为铁锰,中部为铅锌,铜则产于下部。古火山穹隆构造外围、含矿地层、热水沉积岩等可作为主要的找矿标志。

The area is located in the collision zone between North China plate and Qaidam plate.The crust on the southern margin of north China plate has undergone tectonic activities of“cracking”and“subduction”,which provides an extremely favorable geological and structural environment for the deposits formed by hydrothermal excrete deposition.Through the research of Shizhaozi manganese metallogenic regularities,it is considered that the manganese ore is a continuation product,which’s from Baiying factory’s copper polymetallic sulfide in hydrothermal mineralization.Ore-forming space is mainly distributed in the edge of the ancient volcanic edifice block uplift,while Baiyin field distribution of the ore deposit is in the center.Vertical distribution of ore deposits is characterized.The top is iron and manganese,the middle is lead and zinc.Copper is produced in the lower part.The periphery of the ancient volcanic dome structure,ore-bearing strata and hydrothermal sedimentary rocks can be used as the main ore markers.