青海祁漫塔格地区主要矿床类型找矿方法探讨
Discussion on the Metallogenic Characteristics and Ore-prospecting Methods of Qimantage Region, Qinghai Province
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摘要: 基于近年在祁漫塔格地区的勘查实践，初步总结出该区的成矿特征，认为该区主要矿床类型以矽卡岩型铁多金属矿为主，成矿与磁铁矿化密切相关，铁与多金属矿相伴产出，具备磁电方法组合找矿的前提条件。结合生产实例，总结出该区矽卡岩型铁多金属矿有效的勘查方法组合：1：50 000磁法扫面确定找矿远景区→1：10 000高精度磁测缩小找矿靶区→1：2 000磁电剖面定位→钻探验证并控制矿体→井中物探确定矿体范围，找矿效果良好。该找矿方法组合为今后该区科学部署矿产勘查工作起到积极的指导作用。Abstract: Based on the exploration practice achieved in recent years, the paper makes a preliminary summary of metallogenic characteristics in Qimantage region and considers that the main metallogenic types of mineral in this region are skarn type of iron-polymetallic deposit. The mineralization were closely related to magnetite. Iron and polymetallic ore were associated in existence. So the combination method of magnetic and electricity can be applied in ore-prospecting. Combined with production cases, the paper summed up the effective exploration method combination in this region. Firstly, 1:50000 magnetic scanning survey is conducted to determine the ore prospective area, then 1:10000 high-precision magnetic survey is carried out to narrow the prospecting targets, thirdly, 1:2000 magnetic-electric profile is fixed to determine the ore body position, the next step is drilling to verify and control the ore body, finally, borehole geophysical prospecting is applied to determine the ore body range. The exploration method combination has good results in prospecting practice and is good enough to play an active guiding role in the scientific exploration deployment in this region.
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Key words:
- Deposit types /
- Ore-prospecting methods /
- Qimantage /
- Qinghai
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