希腊-保加利亚环罗多布带东部蛇绿岩基性岩套Nd-Sr-Pb同位素地球化学比较

IF 0.2 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society Pub Date : 2022-12-01 DOI:10.52215/rev.bgs.2022.83.3.69

N. Bonev, Zornitsa Dotseva, M. Chiaradia

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引用次数: 0

摘要

报道了希腊东北部色雷斯地区环罗多佩带东部侏罗系超俯冲带Evros蛇绿岩基性岩的同位素组成。这些基性单元由低钛辉长岩和玄武岩组成，其Nd-Sr-Pb同位素与主要的地幔源中洋脊玄武岩(MORB)成分相容，并在俯冲带的熔融源中混合了可检测到的地壳物质和/或沉积物。这些同位素特征与基性蛇绿岩的洋内弧成因一致，Evros蛇绿岩的Nd和Pb同位素与保加利亚南部Rhodope地块东部Mandritsa单元对应的基性岩的Nd和Pb同位素相当。

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Comparative Nd-Sr-Pb isotopes geochemistry of the eastern Circum-Rhodope belt ophiolitic mafic suites, Greece-Bulgaria

We report on the isotopic compositions of the Jurassic supra-subduction zone Evros ophiolite mafic rocks exposed in the eastern Circum-Rhodope Belt in the Thrace region of northeastern Greece. These mafic units consist of low-Ti gabbroic and basaltic rocks, which Nd-Sr-Pb isotopes are compatible with dominant mantle-derived Mid-Ocean Ridge Basalt (MORB) component mixed with a detectable amount of crustal material and/or sediment involved in their melt source in the subduction zone. These isotopic features are consistent with an intra-oceanic arc origin of the mafic ophiolite rocks, and the Evros ophiolite Nd and Pb isotopes are comparable to those of the counterpart mafic rocks from the Mandritsa Unit in the eastern Rhodope Massif of southern Bulgaria.

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Spisanie Na B Lgarskoto Geologichesko Druzhestov-Review of the Bulgarian Geological Society GEOSCIENCES, MULTIDISCIPLINARY-

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