从当今地质知识的角度看罗多彼变质岩群地区的地壳厚度

Neven Georgiev
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引用次数: 0

摘要

罗多彼变质岩群地区的地壳厚度自西向东从约 50 千米减小到约 30 千米。这一区域尺度特征主要是由于基底岩石在该复合体不同地区经历了不同的延伸率。在我们的模型中,我们推测该地区的地壳厚度是晚始新世拉链式或铰链式延伸构造的影响,这种构造导致该地区东部高品位变质岩大量出露,而西部则较少。这种拉链式造山平行延伸造成了巨大的构造侵蚀,地壳自西向东逐渐变薄。
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The crustal thickness in the Rhodope Metamorphic Complex area from the perspective of the present-day geological knowledge
The crustal thickness in the area of the Rhodope Metamorphic Complex decreases from west to east from ~50 km to ~30 km. This regional-scale feature is mostly due to the different rates of extension that the basement rocks experienced in different parts of the complex. In our model, we postulate that the crustal thickness in the area is an effect of the late Eocene zipper-like or hinge-like extensional tectonics that caused a larger amount exhumation of high-grade metamorphic rocks in the eastern parts of the area and lesser one in the west. This zipper-like orogen parallel extension caused a vast tectonic erosion and progressive thinning of the crust from west to east.
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