西昆仑落石沟一带铅锌矿成矿特征及区域预测

西昆仑是新疆西南部重要的成矿区带，落石沟矿带已发现铁多金属、铜、铅锌矿（床）点16处，成矿潜力巨大。从区域地质成矿背景、控矿构造、沉积建造分析入手，以宝塔山、落石沟铅锌矿作为典型矿床，结合重力、磁法、化探、遥感等信息建立了区域预测概念模型，初步总结了该区铅锌矿的控矿规律，确定了区域宏观与微观预测要素。在此基础上运用证据权法采用地质、地球化学、地球物理、遥感等12个变量进行了成矿后验概率计算，后验概率最大值为0.854 022，最小值为0.000 015。按3级分类，成矿最为有利地区后验概率为0.643 428，较为有利地区后验概率为0.432 833，一般有利地区后验概率为0.222 238。按一定颜色进行分区，根据后验概率图圈定了5个最小预测区。对预测区进行了地质评述，结果表明，西昆仑落石沟一带是寻找层控-热液型铅锌矿较为有利的地区。

Metallogenic Rules and Regional Prediction of Lead-Zinc Deposits in Luoshigou of West Kunlun

Sixteen deposits, including iron and base metal, copper and lead-zinc have been found in high potential west Kunlun area，an important metallogenic belt in southwestern Xinjiang. Based on the study of the Baotashan and Luoshigou lead-zinc deposits and gravity, magnetic, chemistry and remote sense information, a regional evaluation conceptual model has been set up, regional ore-controlling law of lead-zinc deposits has been summarized and the predictive components have been determined by the present authors. Using weights of evidence law and 12 variables from geology, geochemistry, geophysics, and remote sense, the mineralized posteriori probability is calculated and five smallest predicted areas are delineated by the present authors.Through summarising the geological constrains of lead-zinc deposits, it is concluded that the Luoshigou area of western Kunlun is the most favorable for looking for hydrothermal lead-zinc deposits.