措莫隆锡多金属矿自然重砂特征及其找矿意义

INDICATION OF HEAVY MINERALS OF CUOMOLONG TIN POLYMETALLIC DEPOSIT

措莫隆锡多金属矿是川西高原最重要的有色金属矿床类型之一,区内自然重砂矿物分布特征明显,异常规模大、强度高,与三叠系图姆沟组、曲嘎寺组及党恩组等矿源层、二长花岗岩、钾长花岗岩、黑云母花岗岩等含锡花岗岩体及控矿、容矿构造都有成因上的联系,与Sn、Pb、Zn、Ag等化探异常及化探综合异常相吻合,并与已知锡矿床(点)有极好的响应。锡石、白铅矿、方铅矿作为该区自然重砂特征组合矿物,其组合异常可作为重要预测因子参与区内锡矿最小预测区的圈定,重砂异常对该区及邻区的锡矿找矿预测及勘查具重要的指示意义。

Cuomolong Tin polymetallic deposit is one of major nonferrous metallic deposits in the West Sichuan Plateau. Natural heavy placer mineral displays obvious distribution characteristics. Anomaly is characterized by large scale and high intensity, closely related to the Triassic Tumugou, Qugasi and Dang＇ en formation of ore source bed, adamellite, k-feldspar granite and biotite granite of tin-bearing granites and ore-controlling structures, consistent with Sn, Pb, Zn, Ag geochemical anomaly and comprehensive geochemical anomaly, which is a good response to the tin deposit. Cassiterite, galena and cerussite as the typomorphic mineral combination, their combination anomaly can be used as an important predictive factor to delineating the smallest prospecting area. Heavy minerals anomaly is a vital indicator of tin prospecting and exploration in this area and its vicinity.