贵州三都交梨汞一金矿床地质特征及找矿潜力

交梨汞、金矿床位于三丹成矿带上，汞矿体呈透镜状、扁豆状、脉状赋存于断裂破碎带上，合矿围岩为下奥陶统锅塘组一套斜坡相的粒屑灰岩。其中产于F1断层及其上盘的①、②号汞矿体中有金矿伴生，构成工业矿体。矿石矿物除辰砂外，还有黄铁矿、毒砂、闪锌矿、雄黄及自然金，偶见自然汞；脉石矿物为方解石、白云石重晶石、石英等，金以自然金属态及类质同位素形式分别含于玉髓和黄铁矿、毒砂等载金矿物中。矿体围蚀变强烈，与汞矿有关的蚀变有雄黄矿化、中强硅化、黄铁矿化、毒砂化及玉髓化（硅化），与金矿化关系密切。汞、金矿的成矿地质条件优越，找矿潜力较大。

Geologic Character and Prospecting Potential of Hg-Au Deposit in Jiaoli of Sandu, Guizhou

The Hg- Au deposit in Jiaoli is situated in the San -Dan metallogenic belt, mercury orebody assumed lentoid, lenticular and nervation and occurred on the fracture cracked belt, ore bearing wall rock is the grainstone of a suit of slope facies of Guoyang formation, Lower Ordovician. The mercury orebody number （1） and （2） which occurred in the F1 fold and its upper plate has associated gold deposit and formed industrial orebedy. Beside cinnabar, ore mineral includes pyrite, arsenopyrite, sphalerite, realgar and native gold, sometimes native mercury can be found. Gangue mineral includes calcite, dolomite, barite, quartz and so on. In the form of native gold and isomorphism, gold existed in chalcedony, pyrite, arsenopyrite and other gold carrier mineral. The wall -rock alteration of orebody is intense. The alteration that concerned with mercury deposit includes realgar mineralization, moderate silicification, pyritization, arsenopyrite mineralization and chalcedonization, has deep relation with the gold mineralization. The metaUogenic geological condition is good and the prospecting potential is big.