摘要
老湾金矿床产于中元古界龟山组,主要岩性为二云石英片岩和斜长角闪片岩。矿体受NWW向的韧脆性构造和NE向及NW向的次级构造控制,呈似层状、层状和脉状产出。矿床流体包裹体研究表明,成矿流体具有中-低温度、低盐度和低密度特征;流体包裹体液相成分中富含K+、Na+,二者比值显示成矿流体主要为岩浆水。矿床、围岩和老湾花岗岩的稀土元素研究认为,成矿物质主要来源于围岩和花岗岩。
The Laowan gold deposit occurs in middle Proterzoic Guishan Formation,and its lithological characters are mainly muscovitebiotite quartz schist and anorthosite hornblende schist .The deposit is controlled by a batch of NWW ductilebrittle structure and NE and NW secondary structures, and developes as bedded and veined orebodies.The value of w(K+)/w(Na+) from liquidus components of deposit fluid inclusions indicates that the oreforming fluid is mainly made of magma water,and the fluid is middle or low in temperature and lower in salinity and density. Based on the study results of rare earth elements of the gold deposit, wall rocks and the granite,it is suggested that the oreforming metal elements mainly come from host rocks and Laowan granite.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
2003年第1期47-52,共6页
Journal of Hefei University of Technology：Natural Science
基金
地矿部"九五"重大基础资助项目(9501102)
