Determination of block rotations and the Curie Point Depths of magnetic sources along the NW–SE-trending Sülüklü–Cihanbeyli-Gölören and Şereflikoçhisar-Aksaray Fault Zones, Central Anatolia, Turkey

IF 1.5 Q1 Earth and Planetary Sciences

Geodinamica Acta Pub Date : 2015-03-02 DOI:10.1080/09853111.2014.986873

F. Bilim, A. Aydemir, A. Ateş

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引用次数: 4

Abstract

The Şereflikoçhisar-Aksaray Fault (SAF) and Sülüklü–Cihanbeyli–Gölören Fault (SCGF) zones are located at the eastern and the western margins of the Salt Lake Basin-SLB (Tuzgölü Basin), central Anatolia, Turkey. These fault zones display intense magnetic anomalies along their trends and the positive amplitudes of these anomalies may reach up to 650 nT. In this paper, the body magnetisation directions are estimated from the selected five different magnetic anomalies with positive and negative peaks along these fault zones. Results of calculations indicated that local clockwise rotations are in the range of 34°E and 70°E. These magnetic anomalies were mainly created by the buried intrusive rocks. Locations of buried causative sources along the fault zones were determined from the analytic signal transformation of magnetic anomaly data. Curie Point Depths (CPDs) are also estimated from the aeromagnetic data to determine the thermal structure of the study area and they are correlated with the SAF and SCGF zones. It was found that the depth of magnetic crust varies from 11 to 22 km, consistent with the tectonic fault zones in the study area. The average value was determined as 16.7 km. These depths were correlated with the deep seismic reflection data and depths obtained from two windows in the seismic section, GTRS-87-801 are consistent with the CPDs. Shallow CPDs of magnetic sources are located along the SAF and SCGF to the east and west of the Lake Tuzgölü (Salt Lake) and it may be suggested that magnetic sources are probably located at the upper part of the crust.

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土耳其中安纳托利亚nw - se向Sülüklü-Cihanbeyli-Gölören和Şereflikoçhisar-Aksaray断裂带磁源块体旋转和居里点深度测定

Şereflikoçhisar-Aksaray断裂带(SAF)和Sülüklü-Cihanbeyli-Gölören断裂带(SCGF)位于土耳其安纳托利亚中部盐湖盆地- slb (Tuzgölü盆地)的东西边缘。这些断裂带沿其走向表现出强烈的磁异常，这些异常的正幅值可达650 nT。本文从这些断裂带上选择的5种不同的正、负峰磁异常估计了体磁化方向。计算结果表明，当地的顺时针旋转在34°E和70°E之间。这些磁异常主要是由隐伏侵入岩造成的。利用磁异常数据的解析信号变换，确定了断裂带上的隐伏诱发源位置。利用航磁资料估算了居里点深度(Curie Point depth, CPDs)以确定研究区的热结构，并将其与SAF和SCGF带进行了对比。研究发现，磁壳深度在11 ~ 22 km之间，与研究区构造断裂带一致。平均值为16.7 km。这些深度与深部地震反射资料进行了对比，GTRS-87-801地震剖面的两个窗口深度与CPDs一致。在Tuzgölü湖(盐湖)东西部沿SAF和SCGF分布有磁源的浅层cpd，提示磁源可能位于地壳上部。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geodinamica Acta 地学-地球科学综合

CiteScore

4.50

自引率

0.00%

发文量

审稿时长

25 weeks

期刊介绍： Geodinamica Acta provides an international and interdisciplinary forum for the publication of results of recent research dealing with both internal and external geodynamics. Its aims to promote discussion between the various disciplines that work on the dynamics of the lithosphere and hydrosphere. There are no constraints over themes, provided the main thrust of the paper relates to Earth''s internal and external geodynamics. The Journal encourages the submission of papers in all fields of earth sciences, such as biostratigraphy, geochemistry, geochronology and thermochronology, geohazards and their societal impacts, geomorphology, geophysics, glaciology, igneous and metamorphic petrology, magmatism, marine geology, metamorphism, mineral-deposits and energy resources, mineralogy, orogeny, palaeoclimatology, palaeoecology, paleoceanograpgy, palaeontology, petroleum geology, sedimentology, seismology and earthquakes, stratigraphy, structural geology, surface processes, tectonics (neoteoctonic, plate tectonics, seismo-tectonics, Active tectonics) and volcanism. Geodinamica Acta publishes high quality, peer-reviewed original and timely scientific papers, comprehensive review articles on hot topics of current interest, rapid communications relating to a significant advance in the earth sciences with broad interest, and discussions of papers that have already appeared in recent issues of the journal. Book reviews are also included. Submitted papers must have international appeal and regional implications; they should present work that would be of interest to many different specialists. Geographic coverage is global and work on any part of the world is considered. The Journal also publishes thematic sets of papers on topical aspects of earth sciences or special issues of selected papers from conferences.