CAJ | 학술논문

姚家岭大型锌金多金属矿床位于长江中下游成矿带铜陵断隆区的东部。本次研究中，在姚家岭矿床蚀变花岗闪长斑岩与大理岩化灰岩捕掳体的接触带的矽卡岩等位置发现了白钨矿。白钨矿电子探针定量分析表明，与理论值相比，WO3值总体偏低，CaO 值总体略高于理论值，白钨矿的杂质组分主要为 SrO、MoO3、CuO、FeO、MnO、MgO、V2 O5和PbO2，计算显示白钨矿的化学式为Ca1．00 W0．99 O4。铜陵矿集区Zn-Au-Cu-Pb为主的矿床中白钨矿的发现表明，该区成矿系统的演化及热液成矿作用过程中可能发生了轻微的壳幔相互作用，在铜陵矿集区及长江中下游成矿带的其他矿集区要重视和加强钨矿化的研究。
요가령대형자금다금속광상위우장강중하유성광대동릉단륭구적동부。본차연구중，재요가령광상식변화강섬장반암여대리암화회암포로체적접촉대적석잡암등위치발현료백오광。백오광전자탐침정량분석표명，여이론치상비，WO3치총체편저，CaO 치총체략고우이론치，백오광적잡질조분주요위 SrO、MoO3、CuO、FeO、MnO、MgO、V2 O5화PbO2，계산현시백오광적화학식위Ca1．00 W0．99 O4。동릉광집구Zn-Au-Cu-Pb위주적광상중백오광적발현표명，해구성광계통적연화급열액성광작용과정중가능발생료경미적각만상호작용，재동릉광집구급장강중하유성광대적기타광집구요중시화가강오광화적연구。
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.