青海省都兰县巴隆地区金矿找矿标志及找矿潜力
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摘要
研究区位于伯喀里克—香日德印支期金、铅、锌、铁、石墨成矿带,对区内地质特征、地球化学特征、地球物理特征等进行了研究。结果表明:研究区内已发现的金矿体多赋存于印支期晚三叠世灰色细粒花岗闪长岩中,少量赋存于黄铁矿化石英脉中,北西向断裂构造为导矿构造和控矿构造,黄铁矿化、硅化与金矿化关系密切; 1∶5万、1∶2. 5万地球化学测量均圈定出以Au为主的综合异常,Au及伴生元素均具三级浓度分带,是研究区良好的地球化学找矿标志;圈定出的磁异常青DC-2008-M247,规模大、幅值高、强度大,是研究区重要的地球物理找矿标志。经验证,研究区内新发现2条金矿化带,圈定出11条金矿(化)体,矿化带延伸稳定,表明研究区无论是在浅部还是深部均具有良好的金矿找矿潜力。
The study area is located in the Indosinian Bokalike-Xiangride gold,lead,zinc,iron and graphite metallogenic belt. The geological,geochemical and geophysical characteristics of the region have been studied. The results show that the gold ores are mostly found in the late Indosinian Triassic gray fine-grained granodiorite in the study area,and a few are found in the pyrite fossil veins. The NW fault structure is the ore-conducting structure and ore-controlling structure in the study area. Gold mineralization is closely related with pyritization and silicification. The geochemical measurements of 1∶ 50 000 and 1 ∶ 25 000 all delineated the comprehensive anomalies dominated by Au,and the Au and associated elements were all divided into three concentration zones,which were good geochemical prospecting indicators in the study area. The delineated blue magnetic anomaly DC-2008-M247,with large scale,high amplitude and high intensity,is an important geophysical prospecting indicator in the study area. It has been proved that two new gold mineralization zones and 11 gold (mineralization) orebodies have been found in the study area,and the mineralization zone has been extended and stabilized,indicating that the study area has good ore-prospecting potential in both shallow and deep areas.
The study area is located in the Indosinian Bokalike-Xiangride gold,lead,zinc,iron and graphite metallogenic belt. The geological,geochemical and geophysical characteristics of the region have been studied. The results show that the gold ores are mostly found in the late Indosinian Triassic gray fine-grained granodiorite in the study area,and a few are found in the pyrite fossil veins. The NW fault structure is the ore-conducting structure and ore-controlling structure in the study area. Gold mineralization is closely related with pyritization and silicification. The geochemical measurements of 1∶ 50 000 and 1 ∶ 25 000 all delineated the comprehensive anomalies dominated by Au,and the Au and associated elements were all divided into three concentration zones,which were good geochemical prospecting indicators in the study area. The delineated blue magnetic anomaly DC-2008-M247,with large scale,high amplitude and high intensity,is an important geophysical prospecting indicator in the study area. It has been proved that two new gold mineralization zones and 11 gold (mineralization) orebodies have been found in the study area,and the mineralization zone has been extended and stabilized,indicating that the study area has good ore-prospecting potential in both shallow and deep areas.
引文
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