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Curie Point Depths of Macedonia and Thrace, N. Greece

机译:马其顿和印第安那色雷斯的居里深度。希腊

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The aeromagnetic data of Macedonia and Thrace were used to produce Curie point estimates. The data were high pass filtered to remove components arising from topography and magnetic core fields which were not adequately modeled by a DGRF. The depth to the centroid, z_0, of the deepest distribution of the magnetic dipoles was obtained by computing a least-squares fit to the lowest-frequency segment of the azimuthally averaged log power spectrum. The average depth to the top of the deepest crustal block was computed as the depth to the top, z_t, of the second lowest-frequency segment of the spectrum. The depth to the bottom of the deepest magnetic dipoles, the inferred Curie point depth, was then calculated from z_b = 2z_0 - z_t. The Curie depth estimates for Macedonia and Thrace range between 11.2 and 17.3 km. These results are consistent with the depths inferred by extrapolating known geothermal gradient and heat-flow values.
机译:马其顿和色雷斯的航空磁数据被用来产生居里点估计值。对数据进行高通滤波,以去除由DGRF未能充分建模的形貌和磁芯场产生的分量。通过计算与方位平均对数功率谱的最低频率段的最小二乘拟合,可以获得磁偶极子最深分布的质心z_0的深度。将最深地壳块顶部的平均深度计算为频谱的第二个最低频率段的顶部深度z_t。然后从z_b = 2z_0-z_t计算出最深的磁偶极子底部的深度,即推断的居里点深度。马其顿和色雷斯的居里深度估计值在11.2至17.3 km之间。这些结果与通过推断已知的地热梯度和热流值推断的深度一致。

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