Trace-element signatures of pegmatite and post-pegmatite minerals from the Govedarnika Pb-Zn deposit, Laki district, Central Rhodopes

IF 0.2 Q4 GEOSCIENCES, MULTIDISCIPLINARY
Y. Georgieva, Georgi Milenkov, R. Vassileva, Sylvina Georgieva
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引用次数: 0

Abstract

The current study presents mineralogical and geochemical characteristics of pegmatite bodies from the Govedarnika Pb-Zn deposit, situated in Laki district, South Bulgaria. The studied pegmatites are composed mainly of K-feldspar, plagioclase, quartz and accessories of titanite, apatite, allanite and zircon. Intensive hydrothermal alteration resulted in specific mineral assemblage of chlorite, hematite, epidote and carbonates. According to the mineral relationships, it preceded or coincided with the time of base metal ore formation and affected both pegmatites and host metamorphic rocks. Both pegmatite accessories and post-pegmatite hydrothermal silicates often show enhanced contents of some strategic elements such as Sr, Li, V, Ga, Ni and REE. Pilot U-Pb geochronology of titanite from the studied pegmatites yielded a lower intercept age of 39.9±2.3 Ma.
罗多佩中部拉基区Govedarnika铅锌矿床伟晶岩和后伟晶岩矿物的微量元素特征
目前的研究介绍了位于保加利亚南部拉基区的Govedarnika铅锌矿床伟晶岩体的矿物学和地球化学特征。所研究的伟晶岩主要由钾长石、斜长石、石英和钛铁矿、磷灰石、尿囊石和锆石等矿物组成。强烈的热液蚀变形成了绿泥石、赤铁矿、绿帘石和碳酸盐的特定矿物组合。根据矿物关系,它早于或与贱金属成矿时间相吻合,同时影响伟晶岩和主变质岩。伟晶岩附件和后伟晶岩热液硅酸盐通常显示出Sr、Li、V、Ga、Ni和REE等战略性元素含量增加。所研究伟晶岩中的钛矿的先导U-Pb地质年代学得出了39.9±2.3Ma的较低截距年龄。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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