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One-Dimensional Thermal Modeling of the Eastern Pontides Orogenic Belt (NE Turkey)

机译:东庞特兹造山带(土耳其东北)的一维热模拟

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The eastern Pontides orogenic belt is one of the most complex geodynamic settings in the Alpine–Himalayan belt due to the lack of systematical geological and geophysical data. In this study, 1D crustal structure and P-wave velocity distribution obtained from gravity modeling and seismological data in the area has been used for the development of the thermal model of the eastern Pontides orogenic belt. The computed temperature-depth profiles suggest a temperature of 590 ± 60°C at a Moho depth of 35 km indicates the presence of a brittle-ductile transition zone. This temperature value might be related to water in the subducted crust of the Tethys oceanic lithosphere. The Curie temperature depth value of 29 km, which may correspond to the crustal magma chambers, is found 5–7 km below the Moho depth. Surface heat flow density values vary from 66.5 and 104.7 mW m−2. High mantle heat flow density value of 48 mW m−2 is obtained for the area should be related to melting of the lithospheric mantle caused by upwelling of asthenosphere.
机译:由于缺乏系统的地质和地球物理数据,东部的庞蒂德斯造山带是阿尔卑斯–喜马拉雅带最复杂的地球动力学环境之一。在这项研究中,从该地区的重力模型和地震数据获得的一维地壳结构和纵波速度分布已用于开发东部庞蒂德斯造山带热模型。计算出的温度-深度剖面表明,在莫霍深度为35 km时温度为590±60°C,表明存在脆性-延性过渡区。该温度值可能与特提斯海洋岩石圈俯冲的地壳中的水有关。发现居里温度深度值29 km(可能对应于地壳岩浆室)位于Moho深度以下5–7 km。地表热流密度值介于66.5和104.7 mW m-2 之间。由于该地区与软流层上升引起的岩石圈地幔融化有关,因此获得了较高的地幔热流密度值,为48 mW m−2

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