【作者】 吴鹏宇；

【导师】 温春齐；

【作者基本信息】 成都理工大学 ， 矿物学、岩石学、矿床学， 2011， 硕士

【摘要】 邦铺钼铜多金属矿床位于西藏冈底斯斑岩铜矿带东段,是典型的大型斑岩型钼铜矿床。钼铜矿体呈等轴状、不规则状,形态基本与斑岩体一致,主要赋存于二长花岗斑岩体及外接触带角岩化带中;矿区南部的铅锌矿体主要呈似层状、囊状赋存于洛巴堆组(P1l)F1断层破碎带中,灰岩、大理岩透镜体边缘接触地带。矿石构造主要有浸染状构造、细脉状构造、团块状构造、角砾状构造等;结构主要为自形粒状结构,半自形粒状结构,他形粒状结构,包含结构,共边结构,交代残余结构等。矿石矿物主要有黄铁矿、辉钼矿、黄铜矿、方铅矿,次为闪锌矿、斑铜矿、磁铁矿、钛铁矿和辉铜矿等。邦铺矿区的成矿过程分为三个期,即岩浆晚期、热液成矿期和表生期。其中,热液成矿期是邦铺钼铜多金属矿床最重要的成矿期,又分为三个阶段,即Mo-Cu硫化物阶段、Pb-Zn硫化物阶段和Gyp-Cal阶段。矿区蚀变分带呈环状分布,从内向外依次为钾硅化-绢云母化带(Si-Se)、绢云母化带(Se)、绢云母化-粘土化带(Se-Ka)、青盘岩化带(P)。钼矿体主要赋存于Si-Se(钾硅化-绢云母化带)和Se-Ka(绢云母化-粘土化带)中;钼元素富集区形态呈脉状,富集程度深部明显好于浅部。铜矿体主要赋存于Se-Ka(绢云母化-粘土化带)和P(青盘岩化带)中;铜元素富集区形态呈脉状,富集程度深部亦明显好于浅部。更多还原

【Abstract】 The Bangpu Mo-Cu polymetallic deposit is one of the typical large-scaled porphyry deposit,lies in eastern Gangdese metallogenic belt,Tibet.Molybdenum and Copper ore body mainly occur in the porphyry monzogranite K silicified zone, phyllic zone and the outer contact zone with an angular rock of the main shaft .Its shape likes the porphyry such as cystic and irregular shape. Monzogranite porphyry is ore rock itself, Central deposit was Full mineralization. in the south area of deposit is the body of lead-zinc mining, mainly occur in the Luobadui Formation in Lower Permian（P₁l）,nearly the edges of F₁ Fault belt’s limestone and marble .The structure of ore are impregnation,string ,crumb and breccoated structure et al.The main testure are self-crystals to semi-self crystals,xenotopic,inclusion and coterminal texture et al.Dominanent metallic minerals are pyrite,molybdenum, copper,galena,secondary are sphalerite, borite, magnetite, kibdelophane , chalcocite, et al.We divided the metallogenic process of Bangpu deposit into three stage,which are magma-advanced atage,hydrotherm ore forming stage and supergene stage.When it terms to hydrotherm ore forming stage,we partitioning it to three period also,which are Mo-Cu sulfide period ,Pb-Zn period and gypsum-calcspar period.Mining alteration zoning follows the order of the distribution ring, from the inside to the out side with the order of the Si-Se （silica - sericite zone）, Se （sericite zone）, Se-Ka （sericite - clay of the band）, P （green plate rocks of the zone）. Molybdenum ore bodies occur in the western monzogranite porphyry （ηγπ6¹） which mainly occurs in the Si sub-belt -Se （silica - sericite zone） and Se-Ka （sericite - clay of the zone） . Molybdenum at depth was obviously better than the shallow, which shape is vein.Copper orebodies mainly occur in the monzogranite porphyry （ηγπ6¹） which mainly occurs mainly occurs in sub-Se -Ka （sericite - clay of the band） and P （blue plate rocks of the belt）. In the deep, copper was obviously better than the shallow, ,which shape is vein. Ore is mainly and Evenly in monzogranite porphyry （ηγπ6¹）, angular rock （hs） and gabbro Green Rock （βv）,which mainly occur in Se （sericite zone） and P （blue plate rocks of the belt）.更多还原