西南天山国营马场果尔沟—克勒特白克恰特一带铁锰矿地质成矿特征

西南天山国营马场地区果儿沟—克勒特白克恰特一带铁锰矿与区内分布的玄武岩夹硅质岩类关系密切,矿体赋存于下石炭统玄武岩组(C1xw)中的硅质岩中,成矿严格受玄武岩组地层、区域性大断裂及其旁侧的次级断裂以及物化探异常控制,矿体呈层状、似层状,矿石具隐晶质—微晶结构、胶状结构,不规则条带状、脉状、浸染状、皮壳状构造,属火山喷流沉积型矿床。区域上沿托什罕深大断裂带及其南北侧分布有大量的火山岩,具有重要的找矿意义。

GEOLOGY AND METALLOGENIC SETTINGS OF IRON-MANGANESE MINERALIZATION IN THE GUOERGOU-KELETEBAIKEQIATE ZONE IN STATE-OWNED MACHANG AREA OF SOUTHWESTERN TIANSHAN MOUNTAINS

Iron-manganese mineralization in the Guoergou-Keletebaikeqiate zone in the state- owned Machang area of southwestern Tianshan Mountains is closely associated to basalt with siliceous rocks. Ore bodies are present in siliceous rocks of the Lower Carboniferous basalt formation （Clxw） and mineralization is strictly controlled by basalt rock group, regional faults and adjacent secondary fractures, which are also confined within geophysical anomalies. The ore-bodies are present in stratiform and stratoid structures, in which the ores are of alphanitic-microlitic and colloform textures, and irregular banded, vein-like, disseminated and crustiform structures, belonging to volcanic eruption and sedimentary deposit. Regionally, a lot of volcanic rocks are distributed along both the south and north sides of the Shihan fault, which are important in ore prospecting in this area.