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首页> 外文期刊>Pure and Applied Geophysics >Determination of Tectonic and Crustal Structure of the Eastern Pontide Orogenic Belt (NE Turkey) Using Gravity and Magnetic Data
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Determination of Tectonic and Crustal Structure of the Eastern Pontide Orogenic Belt (NE Turkey) Using Gravity and Magnetic Data

机译：利用重力和磁数据确定东庞德造山带（土耳其北部）的构造和地壳结构

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The Eastern Pontide Orogenic Belt is one of the most complex geodynamic settings within the Alpine belt. Subduction polarity, which is responsible for the formation of the Eastern Pontide Magmatic Arc, is still under debate because of limited geological, geophysical and geochemical data. This orogenic belt is mainly divided into three subzones depending on lithological characteristics and facies changes as in Northern, Southern and Axial Zones from North to South. These zones are separated from each other by near-vertical faults that display the block-faulting tectonic style of this belt. In this study, the tectonic and crustal structure of the Eastern Pontides, which as yet have not been prospected by using geophysical data, has been investigated with potential field data. The horizontal gradient map obtained from gravity data shows a number of steep and gentle lineaments. It seems that these lineaments E-W, NE and NW-trending correspond to major structural zones of continental crust. Additionally, The Moho depth and Curie point depth variation maps of the Eastern Pontide Orogenic Belt have been computed with the power spectral method of the radial wavenumber carried out by using the fast Fourier transform method. As a result of this method, we estimated that the depths of the Moho and Curie point varied between 29.0 +/- A 1.2-47.2 +/- A 1.9 km and 14.3 +/- A 0.7-27.9 +/- A 1.4 km, respectively. Our findings indicate that the Moho depth generally increases from north to south in the region. However, the Curie point depth level within the crust has an undulating surface, not a horizontal one.
机译：东部庞蒂特造山带是高山带内最复杂的地球动力学环境之一。由于有限的地质，地球物理和地球化学数据，导致东部庞蒂德岩浆弧形成的俯冲极性仍在争论中。根据岩性特征和相变，该造山带主要分为三个子区域，如北部，南部和从北到南的轴向带。这些区域由近垂直断层相互分隔，这些断层显示出该带的块断裂构造构造风格。在这项研究中，已经利用潜在的野外数据对东蓬德特斯的构造和地壳结构进行了调查，而尚未通过地球物理数据对其进行勘探。从重力数据获得的水平梯度图显示了许多陡峭而柔和的线条。似乎这些东西线E-W，NE和NW趋势对应于大陆壳的主要构造带。另外，采用快速傅里叶变换法，采用径向波数功率谱方法，计算了东庞特造山带的莫霍深度和居里点深度变化图。作为该方法的结果，我们估计Moho和居里点的深度在29.0 +/- A 1.2-47.2 +/- A 1.9 km和14.3 +/- A 0.7-27.9 +/- A 1.4 km之间变化，分别。我们的发现表明，该地区的莫霍面深度通常从北向南增加。但是，地壳内的居里点深度级别具有起伏的表面，而不是水平的表面。

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