新疆东戈壁斑岩型钼矿床之斑岩体特征  

Geological and Geochemical Characteristics of Ore-forming Granite Porphyry in East Gobi Porphyry Molybdenum Deposit in Xinjiang

作　　者：杨志强[1] 吴邦友[1] 郑松森[1] 安金亮[1] 常勇强[1] 

机构地区：[1]河南省地矿局第二地质勘查院,河南许昌461000

出　　处：《华南地质与矿产》2011年第3期208-214,共7页Geology and Mineral Resources of South China

摘　　要：新疆东戈壁斑岩型钼矿床位于哈密市南110 km,为荒漠戈壁区,隶属于东天山觉罗塔格多金属成矿带。钼矿体赋存于斑状花岗岩体的外接触带浅变质碎屑岩中;侵入岩主要有浅肉红色斑状花岗岩(隐伏岩体)、花岗斑岩脉、细粒花岗岩脉三种,控矿岩体为隐伏斑状花岗岩,属华力西晚期第二次侵入。本文对东戈壁矿区岩体的岩石学、岩石化学、岩石地球化学特征进行了较详细研究,并与国内的斑岩型钼矿岩体的岩石化学、岩石地球化学特征进行了对比,其主要结论是东戈壁矿区斑状花岗岩SiO2含量偏高,属钙碱性岩,侵入岩成因分类属陆壳重熔S型花岗岩。该矿床为新疆发现的第一个特大型钼矿床,此项研究对在区域上寻找同类型矿床具有重要的借鉴意义。East Gobi porphyry molybdenum deposit which locates at south of Hami（about 110 km away）,Xinjiang province,is in the Jueluotage polymetallic metallogenic belt of Eastern Tianshan Mt..Three type magmatic rocks,pale red porphyritic granite,granite prophyry vein and fine-grained granite vein are distributed in East Gobi Mo deposit,while ore-bodies are mainly occurred in the outer contact zone of Late Hercynian intruded porphyritic granite and low-metamorphic clastic rock.The petrological and geochemical feature of ore-bearing porphyry in East Gobi Mo deposit is comparison with the porphyry in other porphyry-type Mo deposits,which indicated that the porphyritic granite is with higher SiO2 content and belongs to calc alkali S-type granite.East Gobi porphyry Mo deposit is the first discovered super-large Mo deposit in Xinjiang province,this research may be very valuable for prospecting the similar deposit in this area.

关 键 词：斑状花岗岩 岩石学特征 地球化学特征 东戈壁斑岩钼矿 新疆 

分 类 号：P618.65[天文地球—矿床学]