运用高分遥感技术圈定西昆仑黑恰铁多金属矿化带

为了在西昆仑地区圈定黑恰铁多金属矿化带,主要运用高分遥感解译和矿化遥感异常信息增强与提取技术,配合适量的野外调查验证及采样测试工作,建立遥感综合找矿模型,为后续区域地质矿产工作规划部署和矿产勘查提供依据。调查结果表明,在黑恰一带圈定了1条找矿潜力巨大的含铜铅锌的菱铁-赤铁矿化带,延伸长度约60 km,宽度200~500 m。矿化带内含多个铁多金属矿化体。矿化体位于温泉沟群d段偏顶部碎屑岩向碳酸盐岩的过渡部位,呈层状、似层状、透镜状产出,产状一般为40°~50°∠68°~81°,与区域地层产状一致。单矿化体长度数百~9 500余m,地表出露厚度2~50 m,一般厚约15 m。地表矿石矿物以赤铁矿和褐铁矿为主,次为镜铁矿,含少量菱铁矿。铁矿化体顶板碎裂化的碳酸盐岩中普遍见Pb-Zn-Cu矿化,部分铁矿化体上部也可见Pb-Zn(少量Cu)矿化。高分遥感技术在西昆仑地区矿产地质综合调查中作用显著,可为实现找矿工作的快速突破创造条件,并为高分遥感技术在相同或类似地区开展找矿工作提供依据和借鉴。

Delineation of Heiqia iron polymetallic mineralization zone in West Kunlun region using high resolution remote sensing technology

In order to delineat Heiqiairon iron polymetallic mineralization belt in West Kunlun region, the authors used high resolution remote sensing interpretation and mineralization anomaly information enhancement and extraction technology, with suitable field sampling and verification test to establish the remote sensing geology prospecting model, which will provide foundation for future remote sensing in metallogenic belt in West Kunlun. The results show that a great potential siderite - copper zinc hematite mineralization belt is found in Heiqia area, which extends about 60 km in length and 200-500 m in width, including a plurality of mineralized bodies. The mineralized bodies are located in the transition site that clastic rock to carbonate rock of the d segment in the Wenquangou Group, appearing in bedded, near bedded and lenticular. The occurrence of the mineralized bodies are generally 40°-50°∠68°-81°, in accordance to the strata. The length of single body changes from several hundred meters to more than 9 500 m, and the exposed thickness on the surface changes from 2 m to 50 m, with the general thickness about 15 m. The surface ore minerals are mainly hematite and limonite, with a small amount of hematite and siderite. The Pb-Zn- Cu mineralization is commonly found in the carbonate rocks in the upper part of the iron ore body, which is also found in the upper part of the iron ore body. It is significantly important that high resolution remote sensing technology is used in mineral geological survey in the West Kunlun area, which would achieve a quick breakthrough in mineral prospecting work and provide the basis for the mineral exploration works in the same or similar area.