东秦岭﹙河南段﹚钼矿床类型及找矿潜力分析

根据东秦岭﹙河南段﹚钼矿床3种成矿流体﹙燕山期岩浆作用形成的高温成矿热液、熊耳期火山期后热液、构造动力作用形成的中低温成矿流体﹚,对应划分3种钼矿床成因类型:岩浆热液交代型钼矿床、石英脉型钼矿床和构造蚀变岩型钼矿床。区内岩浆热液交代型钼矿床,是广义上的斑岩型钼矿,包括斑岩型钼矿、斑岩-矽卡岩型钼矿、斑岩-爆破角砾岩型钼矿、爆破角砾岩型、矽卡岩型钼矿钼矿。根据其产出空间位置不同,进一步划分内接触带型、接触带型和外接触带型矿床。文章还介绍了各类型典型钼矿床特征,分析了各类型钼矿床的找矿方向。

TYPES AND PROSPECTING PPOTENTIAL OF MOLYBDENUM DEPOSIT IN EAST QINLING OROGENIC BELT(HENAN SECTION)

Based on three types of ore-forming fluid in molybdenum deposit(the high-temperature hydrothermal fluid is associated with Mesozoic magmatism,the hydrothermal fluid is from late Xiong’er volcanism and the low-temperature ore-forming fluids is in formation of structural dynamic role) in the East Qinling orogenic belt(Henan section),and divide into three genetic types of molybdenum deposit were marked off: the magmatic hydrothermal Mo deposit,the quartz vein-type Mo deposit and altered rock type Mo deposit.The magmatic hydrothermal Mo deposit of East Qinling(Henan section) is actually a porphyry type Mo deposit in broad sense,including porphyry type deposit,porphyry-skarn deposit,porphyry-breccia-type deposit,breccia-type deposit and skarn type deposit.According to the spatial location of ore bodies,it can be further divided into the inner contact zone type,the contact type and the outer contact zone-type deposit.The characteristics of various types of typical Mo deposits and their prospecting potential were described also.