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A delayed carbonate factory breakdown during the Tethyan-wide Carnian Pluvial Episode along the Cimmerian terranes (Taurus, Turkey)

机译:在沿特米斯山脉的特米斯山脉的卡尼期盆积水集期间,碳酸盐工厂的延迟故障(土耳其金牛座)

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This paper presents a detailed facies analysis and paleo-depth reconstruction of a latest Early Carnian platform drowning-sequence from the Anatolian terrane (Turkey, Taurus Mountains). A total of eight sedimentary microfacies zones were recorded. An open platform margin passes through a deeper shelf margin setting into a basinal environment influenced by more open-marine conditions. The analysis demonstrates an unexpected, pure carbonate depositional system through the so-called Carnian Pluvial Episode (CPE), which has previously been associated with dramatic climate changes throughout the Tethys region. One main finding, based on sedimentological and paleontological analyses, is a much later drowning of the carbonate platforms in Turkey than in other places. The termination of the Kartoz platform postdates the onset of the CPE in the western Tethys by one ammonite zone, corresponding to about 2 million years. The distinctly earlier demise of (north)western Tethyan carbonate platforms and reefs points to a diachrony of this event throughout the Tethys. The decline of carbonate productivity clearly occurs earlier at higher paleolatitudes and later in equatorial areas. Interpreting the CPE as the result of a global or at least Tethys-wide climatic event is therefore highly ambiguous. The described facies changes at Asagiyaylabel probably mirror different coupling effects and, only minimally, the Tethyan-wide climate changes during the Carnian Pluvial Episode.
机译:本文对来自安那托利亚地层(土耳其,金牛座山脉)的最新早期Carnian平台淹没序列进行了详细的相分析和古深度重建。总共记录了八个沉积微相带。开放平台的边缘穿过更深的层架边缘,进入受更多开放海洋条件影响的盆地环境。该分析通过所谓的卡尼期盆积(CPE)证实了出乎意料的纯碳酸盐沉积系统,该系统以前与整个特提斯地区的剧烈气候变化有关。基于沉积学和古生物学分析的一项主要发现是,土耳其的碳酸盐岩平台被淹死的时间比其他地方要晚得多。 Kartoz平台的终止将CPE在特提斯西部的发生推迟了一个铵矿带,相当于大约200万年。 (北部)西部特提斯碳酸盐台地和礁石的较早灭亡,预示着整个特提斯事件的历时。碳酸盐生产力的下降显然发生在较早的高纬度地区和较晚的赤道地区。因此,对全球性气候事件或至少在蒂蒂斯范围内的气候事件的结果进行的CPE解释非常含糊。在Asagiyaylabel上描述的相变化可能反映了不同的耦合效应,并且在最小的程度上反映了Carnian雨季发生的Tethyan范围的气候变化。

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