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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Two-Dimensional Geothermal Modelling Along the Central Pontides Magmatic Arc: Implications for the Geodynamic Evolution of Northern Turkey
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Two-Dimensional Geothermal Modelling Along the Central Pontides Magmatic Arc: Implications for the Geodynamic Evolution of Northern Turkey

机译：沿中部庞德特斯岩浆弧的二维地热模拟：对土耳其北部地热演化的启示

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摘要

The Pontides, which can be divided tectonically into three main segments as Eastern, Central, and Western Pontides, is one of the most complex geodynamic settings within the Alpine belt. The Central Pontides, where the Eastern and Western Pontides met and formed a tectonic knot, represent an amalgamated tectonic mosaic consisting of remnants of oceanic, continental, and island arc segments. Subduction polarity, which is responsible for the formation of the Pontides, is still under debate because of limited geological, geophysical, and geochemical data. Two-dimensional (2-D) thermal modelling studies along the Central Pontides magmatic arc (Northern Turkey), Sakarya and Ki{dotless}r?ehir continents are investigated in order to delineate the crustal thermal structure and subduction polarity. The obtained numerical results indicate that arc and back-arc regions are hot because of the cooling effects of a subducting plate. Moho temperatures in the investigated region are found between 992°C in the south (back-arc) and 415°C in the north (arc). Moreover, mantle heat flow values vary from 57.2 mWm ~(-2) in the south (back-arc) to 34.7 mWm ~(-2) in the north (arc). It is shown from this study that the Eurasia plate had moved from north to south under the Anatolia plate along the south Black Sea coast.
机译：庞蒂德斯构造上可分为三个主要部分，即东部，中部和西部庞蒂德斯，是阿尔卑斯带中最复杂的地球动力学环境之一。东部和西部庞德峰相遇并形成构造结的中央庞德峰是由大洋，大陆和岛屿弧段的残余物组成的混合构造马赛克。由于有限的地质，地球物理和地球化学数据，俯冲极性是造成庞德山脉形成的原因，目前仍在争论中。为了描述地壳热结构和俯冲极性，研究了沿中部庞蒂德斯岩浆弧（土耳其北部），萨卡里亚和基尔·多兹里尔大陆的二维（二维）热模型研究。所得数值结果表明，由于俯冲板的冷却作用，弧区和后弧区很热。在研究区域中，莫霍面温度在南部（弧后）992°C和北部（弧度）415°C之间。而且，地幔热流值从南部（后弧）的57.2 mWm〜（-2）到北部（弧）的34.7 mWm〜（-2）不等。从这项研究中可以看出，欧亚大陆板块已经在安纳托利亚板块下从北向南沿着黑海南部海岸移动。

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