Abstract Submarine fan deposits which constitute the remnants of Neo-Tethys are widely observed throughout the Bitlis–Zagros Suture Belt. Most of these deposits are located in the Arabian-Eurasian collision zone and have been intensively deformed due to ongoing tectonic activity. In this study, the depositional characteristics and preservation processes of the undeformed, Lower Miocene Gorendagi Submarine Fan deposits, associated with this zone, are studied with respect to their sedimentological and structural features. These deposits display feeder or distributary channels, overbank, and lobe sediments and classical Bouma Ta–d divisions. They are subdivided into inner, middle, and outer fan, according to sedimentological and morphological properties. Sand-rich submarine fan deposits have 39 m thickness and approximately 2 km of lateral extension. The submarine fan body is bounded to the north and the south by two reverse faults, namely the Ozyurt and Goktepe faults. These faults formed an accommodation space where the fan was deposited and also caused the deepening of the basin. The position and activity of these oppositely inclined reverse faults, which form a triangular zone, are the main reason for preservation of the original fan morphology in the Gorendagi Submarine Fan. Our results indicate that the Gorendagi Submarine Fan represents one of the last sequences deposited before the closure of the southern branch of the Neo-Tethys Ocean and also the most well-preserved.

中文翻译：

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新特提斯洋（东安纳托利亚-土耳其）未变形的下中新世 Görendağı 海底扇沉积物的沉积结构：扇形形态保存的构造控制

摘要 构成新特提斯残骸的海底扇形沉积物在整个比特利斯-扎格罗斯缝合带被广泛观察到。这些矿床大多位于阿拉伯-欧亚碰撞带，并且由于持续的构造活动而发生强烈变形。在这项研究中，研究了与该带相关的未变形的下中新世 Gorendagi 海底扇沉积物的沉积特征和保存过程，并对其沉积学和结构特征进行了研究。这些沉积物显示出支流或分流河道、堤岸和叶状沉积物以及经典的 Bouma Ta-d 分区。根据沉积学和形态特征，它们被细分为内扇、中扇和外扇。富含砂的海底扇沉积物厚度为 39 m，横向延伸约 2 km。海底扇体以两条反向断层为界，即Ozyurt断层和Goktepe断层。这些断层形成了扇沉积的容纳空间，也造成了盆地的加深。这些相反倾斜的反向断层的位置和活动形成三角形带，是Gorendagi海底扇保留原始扇形貌的主要原因。我们的研究结果表明，Gorendagi Submarine Fan 是新特提斯洋南支闭合前最后沉积的层序之一，也是保存最完好的层序。这些断层形成了扇沉积的容纳空间，也造成了盆地的加深。这些相反倾斜的反向断层的位置和活动形成三角形带，是Gorendagi海底扇保留原始扇形貌的主要原因。我们的研究结果表明，Gorendagi Submarine Fan 是新特提斯洋南支闭合前最后沉积的层序之一，也是保存最完好的层序。这些断层形成了扇沉积的容纳空间，也造成了盆地的加深。这些相反倾斜的反向断层的位置和活动形成三角形带，是Gorendagi海底扇保留原始扇形貌的主要原因。我们的研究结果表明，Gorendagi Submarine Fan 是新特提斯洋南支闭合前最后沉积的层序之一，也是保存最完好的层序。