Seismic imaging of the geodynamic activity at the western Eger rift in central Europe

Seismic imaging of the geodynamic activity at the western Eger rift in central Europe
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中欧西埃格尔裂谷地球动力活动的地震成像

DOI:
10.1016/j.tecto.2015.02.010
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发表时间:
2015
期刊:
影响因子:
2.9
通讯作者:
T. Fischer
T. Fischer
中科院分区:
地球科学2区
文献类型:
--
作者:
N. Mullick;S. Buske;P. Hrubcova;B. Ruzek;S. Shapiro;P. Wigger;T. Fischer

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位于中欧捷克-德国边界的西埃格裂谷是阿尔卑斯山前地区欧洲新生代裂谷系(ECRS)中一个重要的地球动力学活动区。沿着ECRS的另外两个活动区,法国中部地块和东部和西部艾菲尔火山区,它的特点是大量的富CO2流体排放点和频繁的微震活动。在上地幔中存在一个羽状物,这可能是造成这些观测结果的原因。在这里,我们重新处理一个预先存在的深地震反射剖面'9 HR'和解释地下结构映射的地震反射率与以前的发现,主要是从地震和地球化学研究,调查地球动力学活动在地下。我们发现的路径,这可能会让岩浆流体起源于上地幔上升,通过地壳,并导致所观察到的流体发射和地震活动的突出线索。
The western Eger rift at the Czech–German border in central Europe is an important geodynamically active area within the European Cenzoic rift system (ECRS) in the forelands of the Alps. Along with two other active areas of the ECRS, the French Massif Central and the east and west Eifel volcanic fields, it is characterized by numerous CO2-rich fluid emission points and frequent micro-seismicity. Existence of a plume(s) is indicated in the upper mantle which may be responsible for these observations. Here we reprocess a pre-existing deep seismic reflection profile ‘9HR’ and interpret the subsurface structures as mapped by seismic reflectivity with previous findings, mainly from seismological and geochemical studies, to investigate the geodynamic activity in the subsurface. We find prominent hints of pathways which may allow magmatic fluids originating in the upper mantle to rise through the crust and cause the observed fluid emanations and earthquake activity.
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