摘要:
东秦岭是我国重要的花岗伟晶岩分布区和稀有金属成矿区,广泛发育各种类型花岗伟晶岩脉,并形成4个花岗伟晶岩脉密集区。丹凤资峪沟花岗伟晶岩脉型铷矿为新发现的铷矿床,产于华力西期的花岗伟晶岩脉中,矿区内含铷伟晶岩矿体规模大,延伸长,铷矿化均匀,Rb2O含量较高。通过对矿体产出构造位置、矿体特征、矿石成份、岩石地球化学特征及铷赋存状态的分析研究,认为矿体与宽坪岩体关系密切,宽坪岩体为该类型花岗伟晶岩脉母岩,且铷主要赋存于微斜长石和白云母中,成因类型为花岗伟晶岩型矿床。结合区内地质背景、伟晶岩脉发育程度、铷等稀有元素矿化特征、找矿标志等,认为区内成矿地质条件良好,具有较大的铷等稀有金属矿产的找矿前景,并为下一步找矿圈定有利地段。
Abstract:
The eastern Qinling belt is the important granitic pegmatite distributions region and rare metal metal-logenic province, where extensively crop out granitic pegmatite with different types and formed four pegmatite concentration zones. Pegmatite type of rubidium ore in Ziyugou was new found. The deposit occurs in the Variscan intrusive granitic pegmatite veins. The ore body is large in scale, extending far, and the content of Rb2O is high. Through analysis of the position and characteristics of the ore body, ore components, chemical composition of the rocks, and rubidium elements in the ore occurrence, considering KuanPing granite is the mother rock of granitic pegmatite veins. Rubidium is mainly in the feldspar and mica. The deposit is granitic pegmatite type. According to the geological characteristics of granitic pegmatite with large distribution area, extensive type, mineralization, and the symbol of Ziyugou Rb deposit, considering the eastern Qinling belt is the potential metallogenic province of rare metals. And finally we delineate favorable prospecting area for the next step.
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