X-ray fluorescence anomalies in the Chakabeishan exploration area for lithium-beryllium deposits, Qinghai Province:Characteristics and implications for prospecting
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摘要: 在青海省乌兰县茶卡北山勘查区开展了土壤X射线荧光测量勘查伟晶岩锂铍矿的研究,结果表明,通过测量Ca、Ni、Mn、Fe以及Nb、Ta、Rb、K两组指示元素,可以准确捕获花岗伟晶岩锂铍矿形成的土壤次生晕。其中,第一组元素的X射线荧光异常信息用于指示含矿层位花岗伟晶岩的位置,第二组元素的X射线荧光异常则用于圈定具有矿化显示的伟晶岩脉的位置、走向及其在平面上的延伸范围。根据捕获的X射线荧光异常推测,勘查区主矿脉沿西北、东南两个方向还有较大延伸,该结论为下一步找矿工作提供了参考。Abstract: The research on exploring pegmatite-type lithium-beryllium deposits through soil X-ray fluorescence measurements was conducted in the Chakabeishan exploration area of Ulan County, Qinghai Province. The results demonstrate that soil secondary halos formed by granite pegmatite-type lithium-beryllium deposits can be accurately captured by measuring two groups of indicator elements, i.e., Ca, Ni, Mn, Fe, and Nb, Ta, Rb, K. The X-ray fluorescence anomalies of the first group of elements indicate the position of the ore-hosting horizon (i.e., granitic pegmatites). Those of the second group of elements are used to determine the location, strike, and planar extension range of the pegmatite veins with mineralization manifestation. As inferred from the captured X-ray fluorescence anomalies, the main ore veins in the exploration area exhibit significant extensions along the northwest and southeast directions. This conclusion provides a reference for further prospecting work.
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