山阳-柞水矿集区斑岩-矽卡岩型多金属矿床找矿方法组合研究

山阳-柞水矿集区构造-岩浆活动强烈,成矿作用显著,以发育新元古代、晚三叠世、晚侏罗世-早白垩世三期岩浆作用及其相关的斑岩-矽卡岩型铜钼-金-铁多金属矿床为特征。这些不同类型矿床的找矿方法在不同找矿阶段完全不同。其中预查选区阶段在综合研究基础上,采用以1∶50000水系沉积物测量为主,结合1∶100000航磁解译或1∶50000高精度磁测,地质地球化学剖面与激电/磁法剖面相互验证,以快速圈定靶区或矿化带;普查评价阶段在1∶10000~1∶2000地质填图、大比例尺遥感解译及蚀变信息提取基础上,通过1∶10000或1∶5000土壤正规网测量、高精度磁测或激电扫面、可控源音频大地电磁测深、高光谱蚀变矿物填图、地物化综合剖面等方法综合确定含矿地段,依据工程验证控制进一步有效追索、圈连矿(化)体。通过这些找矿方法组合,目前已在山阳-柞水矿集区内发现池沟铜钼矿床、冷水沟铜矿床和白沙沟金矿点等。

Study on exploration methods combination for porphyry- and skarn-type metal ore deposit in Zhashui-Shanyang concentration area

Shanyang-Zhahui ore concentration area is characterized by serious tectomagmatic activity and outstanding mineralization. Neoproterozoic, Late Triassic, and Late Jurassic-Early Cretaceous magmanism and related porphyry-skarn type copper-gold-iron polymetallic deposits widespread in this area. The prospecting methods for those deposits are different in disparate exploration stage. During the target selected phase, the major prospecting method is stream sediment survey in 1 50000 scale on the base of synthetical research in order to quickly identify target section or mineralized belt, combining with the methods of 1 100000 aeromagnetic interpretation or high-precision magnetic survey in 1 50000 scale, and testing each other by geological and geochemical profile and IP/magnetic profile methods. However, on the base of geological mapping in 1 10000~1 2000 scale, the large scale interpretation of remote sensing and extracting the information of alteration, we can use the combination methods of soil normal network measurement, high precision of magnetic survey or IP scanning in 1 10000 or 1 5000 scale, CSAMT, ASD, and geology-geochemistry-geophysics integrated composite section to confirm ore-bearing district, and to recourse and dealineate ore or mineralized bodies still furthermore according to engineering validation control during the stage of reconnaissance and evaluation. The Chigou copper-molybdenum ore occurrence, Lengshuigou copper ore occurrence and Baishagou gold ore occurrence have been discovered by this way in Zhashui-Shanyang concentration area.