罗多彼山脉西部的伟晶岩:锆石数据

V. Grozdev, R. Vassileva, Sylvina Georgieva
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引用次数: 0

摘要

通过使用 LA-ICP-MS 对锆石进行 U-Pb 地球年代学研究,获得了罗多彼山脉西部两个地方(Rakitovo 和 Lepenitsa)伟晶岩的年龄。伟晶岩由切皮诺岩石构造单元的变质岩所承载。来自 "Suhata Reka "采石场(拉基托沃地点)的大型伟晶岩/堆积体形成于 68.7±1.3 Ma,而位于大林格勒镇以南的小型变形体(莱佩尼察地点)的年龄为 63.4±1.2 Ma。据推测,横切蚀变安山岩堤侵入变质岩和伟晶岩的时间为 59 Ma。这些数据表明与里拉-西-罗多坡岩浆岩(RWRB)岩浆活动的初始阶段有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Pegmatites from western Rhodope Mts.: zircon data
Ages of pegmatites from two localities (Rakitovo, Lepenitsa) from the western Rhodope Mts. were acquired by U-Pb geochronology on zircon with LA-ICP-MS. The pegmatites are hosted by the metamorphic rocks of the Chepino lithotectonic unit. The large pegmatite/s accumulation from the “Suhata Reka” quarry (Rakitovo locality) is formed at 68.7±1.3 Ma, while small deformed body southwards of Velingrad town (Lepenitsa locality) yielded age of 63.4±1.2 Ma. Crosscutting altered andesite dyke is presumed to intrude the metamorphic rocks and pegmatite at 59 Ma in the Lepenitsa locality. The data suggests connection with the initial stage of the magmatic activity of the Rila-West-Rhodope Batholith (RWRB).
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