地质学报Issue(4)：620-629,10.
安徽铜陵姚家岭大型锌金矿床中新发现白钨矿
Discovery of Scheelite in Yaoj ialing Large Zinc-Gold Deposit in Tongling Ore District,Anhui Province,China
摘要
Abstract
TheYaojialing large zinc-gold polymetallic deposit is located in the eastern part of the Tongling uplift district.It is a recently-discovered large zinc-gold deposit in the Middle-Lower Yangtze River Valley metallogenic belt and it is also the first large zinc-gold deposit in the Tongling district with drilling indicated reserves of 1.2 Mt of Zn with an average ore grade of 3.64%,50 t of Au,and Pb,Cu and Ag as by-products.The dominant orebodies,whose shapes commonly consist of vein or lenticular,occur along the contact zone between early Cretaceous granodiorite porphyry intrusion and Carboniferous-Triassic limestone or situate inside limestone xenoliths entrapped within the porphyry intrusion.The common ore minerals comprise sphalerite,galena,chalcopyrite,gold,pyrite,minor scheelite,molybdenite,bornite, hematite and magnetite,etc.Gangue minerals include calcite,garnet,K-feldspar,quartz,fluorite, epidote and so forth.Metasomatic texture,subhedral to anhedral granular texture and disseminated-massive structure are regarded as the staple ore texture and structure.Wall-rock alterations existed in the deposit are well developed and mainly present as K-feldspar alteration, skarnization, silicification, sericitization, carbonatization, clayzation. Needs to be stressed that skarnization, silicification and carbonatization are closely associated with mineralization.Scheelite has been discovered in some locations especially in the skarn on the contact between limestone and granodiorite porphyry intrusion.Compared with the theoretical values for scheelite composition,the value of WO3 in the deposit is generally a little lower than the theoretical value whereas the value of CaO is slightly higher.There are some other impurities including SrO,MoO3 ,CuO,FeO,MnO,MgO,V2 O5 and PbO2 .The chemical formula for scheelite is Ca1.00 W0.99 O4 .The discovery of scheelite in the Zn-Au-Cu-Pb deposit in Tongling area indicates that metallogenic system evolution and hydrothermal mineralization probably witnessed the slight crust-mantle interaction in the area.Related research should be encouraged and strengthened in other areas of the Middle-Lower Yangtze River Valley metallogenic belt.关键词
白钨矿/姚家岭/铜陵/长江中下游成矿带Key words
scheelite mineral/Yaoj ialing/Tongling/the Middle-Lower Yangtze River Valley引用本文复制引用
钟国雄,周涛发,袁峰,蒋其胜,范裕,张达玉,黄建满..安徽铜陵姚家岭大型锌金矿床中新发现白钨矿[J].地质学报,2014,(4):620-629,10.基金项目
本文为国家“深部探测技术与实验研究专项（SinoProbe）”第三项目“深部矿产资源立体探测技术及实验研究”第五课题（编号SinoProbe-03-05）、国家自然科学基金项目（编号41320104003和40830426）、中国地质调查局地质调查工作项目（编号1212011121115和1212011220243）、安徽省公益性地质工作项目（编号2011-20）和新世纪优秀人才支持计划项目（编号 NCET-10-0324）联合资助的成果。 （）
