The crustal structure of the East Anatolian plateau (Turkey) from receiver functions
The crustal structure of the East Anatolian plateau (Turkey) from receiver functions
复制标题
从接收函数看东安纳托利亚高原（土耳其）的地壳结构
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
M. Barazangi
中科院分区：
文献类型：
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作者：
E. Zor;E. Sandvol;C. Gürbüz;N. Türkelli;D. Seber;M. Barazangi
本文利用一个29个宽带PASSCAL临时台网的地震记录获得的接收函数研究了土耳其东部安纳托利亚高原的地壳结构，土耳其东部地震实验（ETSE）通过执行6平面分层网格搜索方案，从叠加的接收器函数中估计S波速度结构，以便以最小的权衡来模拟接收器函数中的一阶特征。我们在网络的西部没有发现明显的地壳根，但在网络的北方部分有一些地壳增厚的证据。我们发现，平均地壳厚度为45公里，平均地壳剪切速度为3.7公里/秒的整个东安纳托利亚高原。在安纳托利亚高原，我们发现了一个突出的低速区的地壳厚度约为46公里的证据。这些结果表明，安纳托利亚高原上2 km高的地形是动态支撑的，因为高原的大部分似乎是均衡补偿不足的。此外，在安纳托利亚高原的最东边缘似乎有一个薄地壳区域，可能是岛弧与欧亚板块增生的遗迹。
The crustal structure of the Anatolian plateau in Eastern Turkey is investigated using receiver functions obtained from the teleseismic recordings of a 29 broadband PASSCAL temporary network, i.e., the Eastern Turkey Seismic Experiment [ETSE]. The S‐wave velocity structure was estimated from the stacked receiver functions by performing a 6‐plane layered grid search scheme in order to model the first order features in the receiver functions with minimum trade‐off. We found no significant crustal root beneath the western portion of the network, but there is some evidence of crustal thickening in the northern portion of the network. We found an average crustal thickness of 45 km and an average crustal shear velocity of 3.7 km/s for the entire eastern Anatolian plateau. Within the Anatolian plateau we found evidence of a prominent low velocity zone where the crust thickness is approximately 46 km. These results suggests that the 2 km high topography across the Anatolian plateau is dynamically supported because most of the plateau appears to be isostatically under‐compensated. Also, there appears to be a region of thin crust at the easternmost edge of the Anatolian plateau that may be a relic from the accretion of island arcs to the Eurasian plate.