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U-Th ages and facies properties of Edremit travertines and tufas, Van, Eastern Anatolia: implications for the neotectonics of the region
Geological Quarterly ( IF 1 ) Pub Date : 2021-07-12 , DOI: 10.7306/gq.1597
Çetin Yeşilova, Pelin Güngör Yeşilova, Mustafa Açlan, Tsai-Luen Yu, Chuan-Chou Shen

Travertine formation is one of the most important archives of active tectonics in a region and provides information about climate, water temperature and quantity, and biological activity. The Edremit travertines and tufas extend over nearly160 km2 within the boundaries of the Edremit area to the east of Lake Van (eastern Turkey), and yield important evidence towards understanding the neotectonics of the region. The Edremit travertines and tufas were studied throughout their full stratigraphic extent, the factors controlling the formation of these deposits were examined, and the succession was sampled for U/Th analysis. Travertine formation was found to occur from 542–29.7 ka, with two different tufa formation periods: from 29.7–5.8 ka and 5.8–2.08 ka. Pauses in travertine formation (palaeosols) were identified from 510–470 ka, 289–269 ka and 91–34 ka. Our study showed that climate parameters affected the formation of tufa, while the Edremit travertines developed under the control of tectonism. The Van Fault is directly associated with travertine development and its age was identified as 542 ka or older. Since the Gürpιnar Fault, one of the most important faults in the region, is effective in shaping the southern slope of the travertines and limiting the movement of the Van Fault, its age should be younger than 542.4 ka. The Elmalιk Fault played an active role in the formation of the Edremit tufas and is proposed to be 29.7 ka in age, from stratigraphic relationships in the region.

 



中文翻译:

Edremit 石灰华和凝灰岩的 U-Th 年龄和相特性,Van,东安纳托利亚:对该地区新构造的影响

石灰华形成是一个地区活动构造最重要的档案之一,提供有关气候、水温和水量以及生物活动的信息。Edremit 石灰华和凝灰岩在 Edremit 地区边界内延伸至范湖(土耳其东部)以东近 160 平方公里,为了解该地区的新构造提供了重要证据。对埃德雷米特石灰华和凝灰岩的整个地层范围进行了研究,检查了控制这些沉积物形成的因素,并对序列进行了采样以进行 U/Th 分析。发现石灰华形成时间为 542-29.7 ka,具有两个不同的凝灰岩形成时期:29.7-5.8 ka 和 5.8-2.08 ka。在 510-470 ka 期间确定了石灰华形成(古土壤)的暂停,289–269 ka 和 91–34 ka。我们的研究表明,气候参数影响了凝灰岩的形成,而埃德雷米特石灰华是在构造运动的控制下发育的。Van 断层与石灰华的发育直接相关,其年龄被确定为 542 ka 或更早。由于古尔皮纳尔断裂是该地区最重要的断裂之一,它有效地塑造了钙华南坡并限制了范断裂的运动,其年龄应小于542.4 ka。Elmalιk 断层在 Edremit tufas 的形成过程中发挥了积极作用,根据该地区的地层关系推测其年龄为 29.7 ka。Van 断层与石灰华的发育直接相关,其年龄被确定为 542 ka 或更早。由于古尔皮纳尔断裂是该地区最重要的断裂之一,它有效地塑造了钙华南坡并限制了范断裂的运动,其年龄应小于542.4 ka。Elmalιk 断层在 Edremit tufas 的形成中发挥了积极作用,从该地区的地层关系推测其年龄为 29.7 ka。Van 断层与石灰华的发育直接相关,其年龄被确定为 542 ka 或更早。由于古尔皮纳尔断裂是该地区最重要的断裂之一,它有效地塑造了钙华南坡并限制了范断裂的运动,其年龄应小于542.4 ka。Elmalιk 断层在 Edremit tufas 的形成中发挥了积极作用,从该地区的地层关系推测其年龄为 29.7 ka。

 

更新日期:2021-07-19
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