河北丰宁县老米沟门金矿地质特征及控矿因素

老米沟门金矿区位于河北省北部丰宁-隆化金成矿带上,主要赋矿层位为太古宇红旗营子组变质岩系。通过研究控矿因素及矿床成因,确定矿区金矿的形成受太古宇红旗营子组地层、东西向、北北西-北西向的次级张性构造和燕山期岩浆活动共同控制,矿床的成因类型应属中-低温热液充填型金矿床。通过对老米沟门金矿矿床地质特征及成矿地质条件的分析研究,总结矿床成因和主要控矿因素,上述研究对矿区外围及深部找矿及丰宁—隆化金成矿带的地质找矿具有一定的参考意义。

Geological characteristics and ore-controlling factors of gold deposit in Laomigoumen,Hebei Province

Laomigoumen gold deposit is located in Fengning Longhua gold metallogenic belt in northern Hebei Province. The main ore hosting horizon is metamorphic rock series of Archean Hongqiyingzi formation. Through the study of ore controlling factors and ore genesis,it is determined that the formation of gold deposit in the mining area is controlled by Archean Hongqiyingzi formation strata,east-west,nnw-nw secondary tensile structures and Yanshanian magmatism,The genetic type of the deposit should belong to"medium low temperature hydrothermal filling type gold deposit". Based on the analysis of geological characteristics and metallogenic geological conditions of laomigoumen gold deposit,the author summarizes the genesis and main ore controlling factors of the deposit,which has certain guiding significance for the prospecting in the periphery and depth of the mining area and the geological prospecting of Fengning Longhua gold metallogenic belt.