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首页> 外文期刊>Pure and Applied Geophysics >Curie point depths based on spectrum analysis of aeromagnetic data, West Anatolian extensional province, Turkey
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Curie point depths based on spectrum analysis of aeromagnetic data, West Anatolian extensional province, Turkey

机译：基于航空磁数据频谱分析的居里点深度，西安那托利亚延伸省，土耳其

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摘要

The Curie point depth map of Western Anatolia was constituted from spectral analysis of the aeromagnetic data. The Curie point depth values from 53 overlapping blocks, 90 x 90 km in size, have been estimated from the band-pass filtered data. The slope of the longest wavelength part of the radially averaged log power spectrum divided by the radial frequency produced the depth to the centroid (z(0)) for the deepest crustal block. The depth to the top (z(t)) was obtained by the slope of the second longest wavelength part of the spectrum. From these depths, the Curie point depth was then calculated by using z(b)=2z(0)-z(t). The Curie point depth estimates for Western Anatolia range between 8.2 and 19.9 km.A corresponding heat-flow map has been constructed from the Curie point depths and thermal conductivity measurements. The boundary between the areas of shallow and deep Curie point depth coincides with an active extensional system which is characterized by a complex cross-cutting horst-graben system. Deepening of Curie point depths (low heat flows) are observed at Hellenic trench axes. The shallow Curie point depths observed in the western part of the study area correspond with recent geological features such as the grabens of the Menderes Massif.
机译：西安纳托利亚的居里点深度图是通过对航空磁数据的频谱分析得出的。从带通滤波后的数据中估计了53个重叠块（大小为90 x 90 km）的居里点深度值。径向平均对数功率谱的最长波长部分的斜率除以径向频率可得出最深地壳块的质心深度（z（0））。通过光谱的第二长波长部分的斜率获得到顶部的深度（z（t））。然后从这些深度通过使用z（b）= 2z（0）-z（t）计算居里点深度。西安纳托利亚的居里点深度估计值在8.2至19.9 km之间，并根据居里点深度和热导率测量值绘制了相应的热流图。居里点深度与深点之间的边界与活跃的伸展系统相吻合，其特征是复杂的横切式霍斯特-格拉本系统。在希腊沟槽轴上观察到居里点深度的加深（低热流）。在研究区西部观察到的浅居里点深度与最近的地质特征（例如Menderes地块的grab陷）相对应。

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