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首页> 外文期刊>Geodinamica Acta >Active tectonics of the Ortak?y fissure-ridge-type travertines: implications for the Quaternary stress state of the neotectonic structures of the Central Anatolia, Turkey
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Active tectonics of the Ortak?y fissure-ridge-type travertines: implications for the Quaternary stress state of the neotectonic structures of the Central Anatolia, Turkey

机译：Ortak？y裂脊型钙华的活跃构造：对土耳其中部安那托利亚新构造结构第四纪应力状态的影响

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摘要

Several geothermal fields are located in a NE-SW trend along a structural lineament around the Sivas basin; one of those is the Ortak?y travertines situated 83 km south-west of Sivas. There are eight fissure-ridge-type travertine localities in the area, although eroded-sheet-type travertines constitute many of the travertines of the region. By evaluating the rocks of the Late Miocene-Early Pliocene K?z?l?rmak Formation, it was determined that fissure axes developed within fissureridge- type travertines, and that the structural elements obtained from satellite images together with the fissures that form the fissure-ridge-type travertines are shear and tension fissures, and the NE-SW-oriented opening of the fissures, were a result of NW-SE-directed compression, which was also responsible for the formation of the Sivas Backthrust. Groundpenetrating radar studies have shown that the thickness of fissure fills within the fissure-ridge-type travertines of the Ortak?y geothermal field increase with depth, and that the hydrothermal fluids which brought about the formation of the travertines moved surfaceward via fissure systems. The results of U/Th radiometric dating indicate that the youngest travertine in the region is 17,761 (_(-268)/~(+269)) years old and the oldest 128,286 (_(-3537)/~(+3662)) years old. Using the widths of banded travertines within the fissure-ridge-type travertines as well as these age results, the opening rate of the Sivas Basin was determined to be.06 (_(-.01)/~(+.05)) mm/year.
机译：沿着Sivas盆地周围的构造构造，沿着NE-SW趋势定位了几个地热场。其中之一是位于锡瓦斯（Sivas）西南83公里处的Ortak？y石灰华。该地区有八个裂脊型的钙华，尽管侵蚀片型的钙华构成了该地区的许多钙华。通过评价中新世-上新世晚期Kzzllrmak组的岩石，可以确定裂隙轴在裂隙脊型钙华内发育，并且从卫星图像中获得的结构元素以及形成裂隙的裂隙脊型钙华是剪切裂缝和张力裂缝，而裂缝的向NE-SW定向张开是NW-SE定向压缩的结果，这也导致了Sivas后推力的形成。探地雷达的研究表明，奥尔塔基地热场的裂脊型钙华内的裂隙填充物的厚度随深度增加，导致钙华形成的热液通过裂隙系统向地面移动。 U / Th放射性测年的结果表明，该地区最年轻的钙华龄为17,761（_（-（268）/〜（+269））岁，最古老的钙华为128,286（_（-3537）/〜（+3662））岁。利用裂缝脊型钙华中带状钙华的宽度以及这些年龄结果，确定了锡瓦斯盆地的开口率是.06（_（-。01）/〜（+。05））mm /年。

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