青海省格尔木市红石沟金锑矿地质特征及找矿标志

Geological Characteristics and Prospecting Criteria of Hongshigou Gold-antimony Deposit in Geermu in Qinghai Province

红石沟金锑矿位于东昆仑阿尼玛卿-北巴颜喀拉成矿带。通过矿床成矿地质背景和地质特征分析,其与区域上的大场、藏金沟金矿具有相同的成矿背景,该文对比分析了控矿因素,对矿床成因进行了探讨,总结了找矿标志。矿床属于岩浆期后中-低温热液蚀变岩型。断裂构造的多期活动为成矿物质的活化、迁移、富集、沉淀提供了通道和容矿场所,断裂构造为主要控矿因素,其次华力西期-燕山期深源岩浆活动和变质作用不仅提供了热源,同时也带来了主要成矿物质,岩浆活动为成矿不可或缺的条件。主要找矿标志为地貌、岩脉、颜色、围岩蚀变和构造破碎带等。

Hongshigou gold antimony deposit is located in east Kunlun metallogenic belt and Animaqing-North bayankara metallogenic subzone.Based on the analysis of ore-forming geological background and geological characteristics,the ore-forming background is the same as that of Dachang and Zangjingou gold deposits in the region.The ore-controlling factors are compared and analyzed,the genesis of the deposit is discussed,and the prospecting criteria are summarized.The deposit belongs to the post magmatic middle-low temperature hydrothermal altered rock type.The multi-stage activity of the fault structure provides channels and ore hosting places for the activation,migration,enrichment and precipitation of the ore-forming materials.The fault structure is the main ore controlling factor.Secondly,the deep-seated magmatic activity and metamorphism of the Variscan-Yanshanian period not only provide the heat source,but also bring the main ore-forming materials.Magmatic activity is an indispensable condition for ore-forming.The main prospecting indicators are landform,vein,color,structural fracture zone and wall rock alteration.