新疆托里县别鲁阿嘎希金矿床地质特征、控矿因素和找矿标志

Geologic features,ore-controlling factors and ore-prospecting indicators of Bieluagaxi Gold Deposit,Tuoli County,Xinjiang

别鲁阿嘎希金矿床位于中亚成矿域哈图成矿带上,兼具造山带型、蛇绿岩型和韧性剪切带型金矿床特征。在野外地质调查基础上,重点分析了别鲁阿嘎希金矿床地质特征,并探讨了其主要控矿因素,总结了该矿床的找矿标志。分析表明,别鲁阿嘎希金矿床主要赋存于中泥盆统库鲁木迪组中,矿体严格受断裂构造控制,矿体间大多呈雁列状展布,整体以成群成带产出,而单个矿体多以脉状产出。矿体主要为蚀变岩型,其上部见少量石英脉型。找矿标志明显,在下一步找矿中有望突破。

Bieluagaxi Gold Deposit is a typical gold deposit located in the Hatu ore belt within the central Asia ore zone,which combines the characteristics of orogenic gold deposits,ophiolite gold deposits and ductile shear zone gold deposits.Based on outdoor geologic survey and underground tunneling investigation,the paper focused on the analysis of the geologic features of Bieluagaxi Gold Deposit,discussed its main ore-controlling factors and summarized the ore-prospecting indicators for the deposit.The results show that Bieluagaxi Gold Deposit is mainly hosted in Middle Denovian Mudi Formation; ore bodies are strictly controlled by fault structure and distributed in groups and zones; ore veins pinch out and reappear on the surface and are distributed in dipping rows; for strike and inclination,they are straight with local dilatation,shrinkage and wave bend; ore bodies are mainly altered rock type and sometimes quartz vein type.The ore-prospecting indicators are obvious,which is a favorable condition to make breakthroughs in the nextstep prospecting direction.