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首页> 外文期刊>Pure and Applied Geophysics >The geoelectrical structure of northwestern Anatolia, Turkey
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The geoelectrical structure of northwestern Anatolia, Turkey

机译：土耳其安纳托利亚西北部的地电结构

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摘要

The magnetotelluric method has been employed to generate a geoelectrical model that will reveal the rich geological pattern and dynamic character of western and northwestern Anatolia, Turkey. Magnetotelluric data were collected from 53 sites along a profile of 290 km from the Dardanelles to the Alasehir Graben. Magnetotelluric data were in the range of 0.00055 Hz to 320 Hz. The models were obtained through 2-D joint inversion of transverse electric and transverse magnetic modes. Lateral changes in geoelectrical models are verified by using gravity and magnetic data. In addition, some of the seismological data presented here agree with proposed models that suggest a brittle-ductile structure boundary at a depth of 20 km. Generally speaking, a regional extensional regime caused reduction in the thickness of the crust and consequent uplift towards the south. The constructed model delineates the western part of the North Anatolian Fault Zone along the Biga Peninsula. The current patterns of volcanic activity on the Biga Peninsula and at Kula are related to conductive spots presented in the models. The border of the Gordes Basin, located between the Izmir - Ankara suture zone and the Menderes Massif, is also well delineated. The North Anatolian Fault Zone presents a pattern in which density and susceptibility anomalies attain relatively high values. Fillings covering most of the surface have lower density and susceptibility values than those of underlying structures.
机译：大地电磁方法已用于生成地电模型，该模型将揭示土耳其西部和西北部安纳托利亚的丰富地质模式和动态特征。从达达尼尔海峡到阿拉塞希尔·格拉本（Alasehir Graben）290公里的剖面，从53个站点收集了大地电磁数据。大地电磁数据范围为0.00055 Hz至320 Hz。这些模型是通过横向电磁模式和横向电磁模式的二维联合反演获得的。地电模型的横向变化通过重力和磁数据进行验证。此外，这里提供的一些地震数据与提出的模型相吻合，这些模型提出了在20 km深度处的脆性-延性结构边界。一般而言，区域性扩张体制导致地壳厚度减小，并随之向南隆升。构造的模型描绘了沿Biga半岛的北安纳托利亚断层带的西部。 Biga半岛和Kula上的火山活动的当前模式与模型中显示的导电点有关。勾勒出位于伊兹密尔-安卡拉缝合区与曼德斯地块之间的戈尔德盆地边界。北安那托利亚断层带呈现出一种模式，其中密度和磁化率异常值达到相对较高的值。覆盖大部分表面的填充物的密度和磁化率值低于底层结构。

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