Curie-point Depth from Spectral Analysis of Magnetic Data in Erciyes Stratovolcano (Central TURKEY)
Curie-point Depth from Spectral Analysis of Magnetic Data in Erciyes Stratovolcano (Central TURKEY)
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DOI：
10.1007/s00024-009-0017-0
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发表时间：
2010-03
影响因子：
2
通讯作者：
N. Maden
中科院分区：
文献类型：
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作者：
N. Maden
通过对磁异常数据应用频谱分析方法，确定埃尔吉耶斯地区的居里点深度和热流值，以识别安纳托利亚中部的热状况。为了计算数据的频谱，该区域的磁异常被转换为二维傅里叶域以获得平均居里深度。该方法可用于确定磁异常源的顶部边界，并揭示研究区域的居里深度为 13.7 公里。获得的结果表明研究区域具有较高的温度梯度（42.3°C km−1）和相应的热流值（88.8 mWm−2）。使用土耳其矿物研究和勘探总局 (MTA) 钻孔测量的温度值，热梯度和热流值计算为 50.7°C km−1、106.5 mWm−2。根据热流值，确定该地区的居里点深度为 11.4 公里。从获得的值得出的结论是，由于下地壳部分熔融，该地区具有非常高的地热潜力。
Curie-point depth and heat flow values of the Erciyes region are determined to identify the thermal regime of the Central Anatolia by applying the spectral analysis method to the magnetic anomaly data. To compute the spectrum of the data, the magnetic anomaly of the region is transformed into 2-D Fourier domain to attain the average Curie depth. This method is useful in determining the top boundary of magnetic anomaly sources and reveals the Curie depth as 13.7 km in the study area. The obtained results imply a high thermal gradient (42.3°C km−1) and corresponding heat flow values (88.8 mWm−2) in the research area. Using the temperature value measured at borehole drilled by the General Directorate of Mineral Research and Exploration of Turkey (MTA), the values for the thermal gradient and heat flow value were computed as 50.7°C km−1, 106.5 mWm−2. From the heat flow value, the Curie-point depth was determined as 11.4 km in this region. It is concluded from the obtained values that the region has very high geothermal potential caused by partial melting of the lower crust.