中国有色金属学报
中國有色金屬學報
중국유색금속학보
THE CHINESE JOURNAL OF NONFERROUS METALS
2013年
9期
2605-2612
,共8页
彭南海%黄德志%辛宇佳%刘忠法%柳永康
彭南海%黃德誌%辛宇佳%劉忠法%柳永康
팽남해%황덕지%신우가%류충법%류영강
湘西沃溪金锑钨矿床%流体包裹体%成矿流体来源%矿床成因
湘西沃溪金銻鎢礦床%流體包裹體%成礦流體來源%礦床成因
상서옥계금제오광상%류체포과체%성광류체래원%광상성인
Woxi Au-Sb-W despite in western Hunan%fluid inclusions%ore-forming fluid origin%deposit genesis
对沃溪金锑钨矿床含金石英脉流体包裹体温度、成分进行研究,并结合井下矿体特征对流体来源及矿床成因进行了探讨。结果表明,沃溪矿区含金石英脉中的流体包裹体均为LV型富液相原生包裹体,并具有中低温(均一温度集中在170~220℃之间)、低盐度(3%~6%,质量分数)及低密度(0.88~0.92 g/cm3)的特征。从包裹体成分上看,流体包裹体同时具有变质流体(中温、低盐度、高CO 2含量)与大气降水w(Na+)/w(K+)>2,w(F?)/w(Cl?)≥1,明显地富集Ca+(w(Ca+)>w(Na+)>w(K+))或Ca+含量较高(w(Na+)>w(Ca+)>w(K+))的成分特征,显示可能为混合流体;从矿脉地质特征来看,沃溪矿区矿脉既发育顺层脉体,又发育切层脉体,亦显示变质分异与热液充填的特征。
對沃溪金銻鎢礦床含金石英脈流體包裹體溫度、成分進行研究,併結閤井下礦體特徵對流體來源及礦床成因進行瞭探討。結果錶明,沃溪礦區含金石英脈中的流體包裹體均為LV型富液相原生包裹體,併具有中低溫(均一溫度集中在170~220℃之間)、低鹽度(3%~6%,質量分數)及低密度(0.88~0.92 g/cm3)的特徵。從包裹體成分上看,流體包裹體同時具有變質流體(中溫、低鹽度、高CO 2含量)與大氣降水w(Na+)/w(K+)>2,w(F?)/w(Cl?)≥1,明顯地富集Ca+(w(Ca+)>w(Na+)>w(K+))或Ca+含量較高(w(Na+)>w(Ca+)>w(K+))的成分特徵,顯示可能為混閤流體;從礦脈地質特徵來看,沃溪礦區礦脈既髮育順層脈體,又髮育切層脈體,亦顯示變質分異與熱液充填的特徵。
대옥계금제오광상함금석영맥류체포과체온도、성분진행연구,병결합정하광체특정대류체래원급광상성인진행료탐토。결과표명,옥계광구함금석영맥중적류체포과체균위LV형부액상원생포과체,병구유중저온(균일온도집중재170~220℃지간)、저염도(3%~6%,질량분수)급저밀도(0.88~0.92 g/cm3)적특정。종포과체성분상간,류체포과체동시구유변질류체(중온、저염도、고CO 2함량)여대기강수w(Na+)/w(K+)>2,w(F?)/w(Cl?)≥1,명현지부집Ca+(w(Ca+)>w(Na+)>w(K+))혹Ca+함량교고(w(Na+)>w(Ca+)>w(K+))적성분특정,현시가능위혼합류체;종광맥지질특정래간,옥계광구광맥기발육순층맥체,우발육절층맥체,역현시변질분이여열액충전적특정。
The study on the composition and temperature of fluid inclusions inside quartz-vein from Woxi Au-Sb-W deposit and wild observation of the relationships between quartz veins and ore body were carried out to discuss the origin of ore-forming fluid and deposit genesis. The results indicate that, in Woxi mine area, fluid inclusions in gold-bearing quartz veins are all LV-type liquid-rich ones, and the fluid has the characteristics of moderate or low temperature (in homogeneous temperature range of 170?220 ℃), low salinities (3%?6%, mass fraction) and low density (0.88?0.92 g/cm3). The composition of fluid inclusions of Woxi Au-Sb-W deposit shows that they have characteristics of both metamorphic water (moderate temperature, low salinity and high content of CO 2 ) and meteoric water (w(Na+)/w(K+)>2, w(F?)/w(Cl?)≥1, w(Ca+)>w(Na+)>w(K+) or w(Na+)>w(Ca+)>w (K+)), which represents mixing of metamorphic water and meteoric water. The study of quartz veins shows that veins and bedded veins both exist in Woxi Au-Sb-W deposit, which also represents characteristics of both metamorphic deposit and mesothermal deposit related to meteoric water.