西藏沙让钼矿首采地段地质特征研究  

STUDY ON THE GEOLOGICAL CHARACTERISTICS IN THE PRIMARY MINING AREA OF SHARANG MOLYBDENUM DEPOSIT, TIBET

作　　者：许远平[1,2] 何政伟[1] 刘严松[1] 唐凤[2] 韦柳春[2] 

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]四川省冶金地质勘查局水文工程大队,成都610501

出　　处：《物探化探计算技术》2011年第2期165-174,107,共10页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：教育部高等学校博士学科点专项科研基金(20070616014);四川省杰出青年学科带头人培养计划项目(06ZQ026-014)

摘　　要：沙让钼矿是近年来新发现的斑岩型辉钼矿床,于斜长花岗斑岩体的构造破碎带中形成细脉状、网脉状矿脉,后期热液作用明显,矿体总体呈近东西走向。矿石工业类型属原生硫化钼矿,金属矿物主要为辉钼矿、黄铁矿、钛铁矿。辉钼矿呈片状、粒状、粉末状分布于矿石中,其单晶粒度≤0.1 mm～2 mm,矿体Mo平均含量为0.038×10-2～0.222×10-2,单样最高含量为3.35×10-2。依据含矿岩体岩石化学分析,这里指出在碰撞过程和后造山过程中,由于重熔岩浆与地壳物质混染程度不同,以及重熔岩浆分异程度差异较大,因此形成了矿区含矿岩体既不同于典型的S型,也不同于典型I型岩浆岩的特征。Sharang molybdenum deposit is magmatic hydrothermal mineral deposit, the molybdenum orebodies mainly occur as veinlet and netted venation within the plagioclase granite-porphyry fracture zone, and the general strike of the orebody is EW. The industrial type of the ore is primary molybdenum sulfide, the main metallic mineral are molybdenite, pyrite, ilmenite. Molybdenite occur as schistose, granular and powdered in the ore, and the grain size of molybdenite single crystal ≤0.1 mm～2 mm, the content of molybdenite in the ore is 0. 1% ～ 3.35%. Based on the petro-chemistry analysis, the paper indicates that in the collision process and post-orogenetic process,the magma hybridization is distinct from crustal matter, and the magmatic differentiation of anatectic magma is widely different. For that reason, the ore-bearing rock bodies in the Sharang deposit have the characteristic which is not only different from typical Stype granites, but also different from typical I-type granites.

关 键 词：斑岩型钼矿 原生硫化矿床 地质特征 沙让钼矿床 

分 类 号：P61[天文地球—矿床学]