库浪那古岩群铁矿找矿潜力浅析—以西昆仑大同乡一带为例
Iron Deposit Prospecting Potential in the Kulangnagu Rock Group: a Case Study on the Datong Township of West Kunlun Area
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摘要: 在对西昆仑塔什库尔干铁矿远景区东南的大同乡一带的遥感异常查证中, 在古元古界库浪那古岩群(Pt1K)中发现2条磁铁矿带, 该磁铁矿带呈条带状、透镜状赋存于库浪那古岩群纹层状磁铁石英夹云母石英片岩、大理岩地层中, 为首次证实在库浪那古岩群有较富条带状磁铁矿层存在。通过对该地区库浪拉古岩群的原岩恢复及地层古地理环境、原岩建造、成控矿环境等成矿地质背景分析, 认为库浪那古岩群具备寻找沉积变质型铁矿潜力。在对大同南库浪那古岩群磁铁矿带高分遥感剖析的基础上, 结合地物化资料, 对大同乡以南地区库浪那古岩群的铁矿找矿远景区进行了探讨, 提出了大同乡南、布伦木沙乡东南2处磁铁矿找矿有利区, 为下一步找矿提供方向。Abstract: By the remote sensing anomaly inspection, two magnetite ore belts were first found in the Palaeoproterozoic Kulangnagu rock group(Pt1K) at Datong township area, which located in the southeast of West Kunlu Taxkorgan iron deposit prospect area. Shaped like ribbon or lenticular, the magnetite belt was hosted in quartz schist of marble stratum. Based on the regional stratigraphic paleogeographic environment, primary rock formation, ore-controlling environment geological background analysis, it is considered that the Kulangnagu rock group has prospecting potential for metamorphosed sedimentary iron ore. Based on the analysis of high resolution remote sensing, combined with geochemical and geophysical data, we discussed the ore prospecting area and put forward two favorable magnetite prospecting areas, one at the south of Datong township area, the other at the southeast of Bulunmusha Township, which provides direction for the next step of prospecting.
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