西藏山南明则矿区斑岩型钼矿地质特征及外围找矿预测  

Geological Characteristics of the Mingze Porphyry Molybdenum Deposit and Prospecting Prognosis in Its Adjacent Area,Shannan,Tibet

作　　者：陈玉水[1] 王成东[1] 杜庆安[1] 

机构地区：[1]中国冶金地质总局第二地质勘查院,福建莆田351111

出　　处：《地质与勘探》2011年第1期31-35,共5页Geology and Exploration

摘　　要：西藏山南明则矿区斑岩型钼矿床主要由一厚大隐伏的钼矿体组成,其上部覆盖着巨厚层的古近系罗布莎群磨拉石建造。矿床赋存于冈底斯-念青唐古拉板片与喜马拉雅板片的结合带附近,赋矿岩石为钾长花岗岩和二长花岗斑岩。自上而下递次出现青盘岩化、泥化、(黄铁)绢云母化或石英钾化带。岩体侵入时代为古近纪渐新世。辉钼矿Re-Os同位素等时线年龄值为30Ma。该矿的发现为冈底斯成矿带南缘寻找同类斑岩型钼(铜)矿提供了新的线索。The Mingze porphyry molybdenum deposit in Shannan,Tibet,is mainly composed of concealed massive molybdenum orebodies,which are covered by thick Paleogene Luobusa molasse.It lies in the suture zone between the Gangdise-Nyainqentanglha plate and the Himalayan plate.The deposit is hosted in K-feldspar granite and monzonitic granite-porphyry.From the top to the bottom of the orebody,alteration varies from propylitic alteration,argillization,phyllite-like alteration,pyritization to silicification and potassic alteration.The age of intrusive rock is Paleogene Oligocene,and the Re-Os isotope age of molybdenite ore is 30Ma.The discovery of the Mingze deposit provides new helpful evidence for prospecting similar porphyry molybdenum（copper）deposit along the southern margin of the Gangdise metallogenic belt.

关 键 词：斑岩型钼矿 地质特征 找矿预测 冈底斯东段 明则 

分 类 号：P618[天文地球—矿床学]