云南文山官房钨矿床团山矿段围岩蚀变与矿化规律研究  

Regularity of Wall Rock Alteration and Mineralization in the Tuanshan Ore Section,Guanfang Scheelite Ore Deposit,Wenshan,Yunnan

作　　者：张亚辉[1] 张世涛[1] 冯明刚[1] 刘小波[1] 孙琦森[1] 张博[1] 

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《现代地质》2011年第4期740-749,共10页Geoscience

基　　金：国家自然科学基金项目(619220090006)

摘　　要：云南省文山县官房白钨矿床属于中—大型矽卡岩型白钨矿床。矿区内围岩蚀变强烈,蚀变分带明显,依据蚀变岩岩相学及岩石化学测试结果,并结合钻孔编录资料,将团山矿段围岩蚀变划分为3个蚀变带,自花岗岩体向外依次为金云母-绿帘石化带→透辉石-透闪石化带→镁橄榄石化带。通过对各蚀变带中岩石组分迁移量分析认为:在团山矿段热液蚀变及白钨矿化过程中,来自花岗质岩浆热液的A l2O3、S iO2、TFe、K2O、Na2O迁入,灰岩(白云质灰岩)中MgO、CaO迁出,团山矿段白钨矿化主要发生在透辉石-透闪石化带中,矿体产状与透辉石-透闪石带产状基本一致,橄榄石化带中钨矿化相对较弱,金云母-绿帘石化带中仅可见零星钨矿化。这一研究成果将对文山官房钨矿床成矿规律研究以及矿区进一步找矿提供重要的理论依据。The Wenshan scheelite ore deposit is a medium-large skarn-type scheelite deposit,which has an intense wall rock alteration and zoning evidently.According to petrography and petrochemistry of alterated rocks,combining with the data of drill hole,three alteration zones are classified from the internal to external zoning of the rock body in the Tuanshan section： phlogopition-epidotization zone→dipsidization-hopfneritation zone→forsteritation zone.Based on transfer amounts of rocks components in all kinds of alteration zones,this paper regards that Al2O3,SiO2,TFe,K2O,Na2O coming from granitic thermal water of magma immigrate and MgO,CaO coming from limestone emigrate in the process of thermal water alteration and scheelite mineralization;therefore,we could draw conclusions： scheelite mineralization mainly occurs in dipsidization and hopfneritation zone;ore body attitude is consistent with dipsidization-hopfneritation zone;scheelitee mineralization is relatively weak inforsteritation zone;mineralization can be only found scattered in the phlogopition-epidotization zone.This research would provide important theory basis for ore deposit metallogenic rule and further searching for mine in Guanfang ore field in Wenshan.

关 键 词：钨矿床 矿化蚀变 成矿规律 文山官房 云南 

分 类 号：P618.67[天文地球—矿床学]