The Hecataeus Rise, easternmost Mediterranean: A structural record of Miocene-Quaternary convergence and incipient continent-continent-collision at the African-Anatolian plate boundary
The Hecataeus Rise, easternmost Mediterranean: A structural record of Miocene-Quaternary convergence and incipient continent-continent-collision at the African-Anatolian plate boundary
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地中海最东端的赫卡泰乌斯海隆：非洲-安纳托利亚板块边界中新世-第四纪汇聚和早期大陆-大陆碰撞的结构记录
DOI：
10.1016/j.marpetgeo.2015.04.021
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发表时间：
2015
影响因子：
4.2
通讯作者：
Hübscher
中科院分区：
文献类型：
--
作者：
Reiche;Hübscher
赫卡泰乌斯海隆代表着一个高原状结构，毗邻塞浦路斯南部边缘，紧邻塞浦路斯-埃拉托色尼海山汇聚带，据信这里发生了早期的大陆-大陆碰撞。根据新获得的地震反射和测深数据，我们报告了沿非洲-安纳托利亚板块边界这一尚未充分勘探的区域的中新世到第四纪的构造演化。前麦西尼亚时期的挤压使高原地区的西部和南部发生了显着的变形。塞浦路斯陆上地貌的海上延续证明了塞浦路斯与赫卡泰乌斯隆起之间存在前麦西尼亚时期的结构联系。由于在麦西尼亚盐度危机期间其位置相对较高，赫卡泰乌斯海隆经历了大范围的麦西尼亚侵蚀，并且仅在小型、孤立的次盆地内沉淀出蒸发岩的局部沉积。后麦西尼阶辐合沿着赫卡泰乌斯隆起的东南侧进行，这里北东-西南走向的背斜结构经历了重新激活和显着增长。高原地区西北部突出的上新世-第四纪不整合面可能与上新世-更新世过渡有关，并表明多个构造地层事件几乎同时发生。我们认为这些事件代表了埃拉托色尼海山与塞浦路斯和赫卡塔乌斯海隆西北角的早期碰撞引发的一系列结构和沉积变化。碰撞引起的塞浦路斯隆起导致塞浦路斯与赫卡泰乌斯隆起之间发生垂直分离，并在高原地区西北部形成了突出的不整合面。塞浦路斯附近斜坡的增加促进了更活跃的下坡沉积物输送，这表现为沉积物波的发展和高原地区东北部边缘突出的峡谷结构的演变。
The Hecataeus Rise represents a plateau-like structure, adjacent to the southern Cyprus margin and directly next to the Cyprus – Eratosthenes Seamount convergence zone, where incipient continent-continent-collision is believed to occur. Based on newly acquired seismic reflection and bathymetric data, we report on the Miocene to Quaternary structural evolution of this yet underexplored sector along the African-Anatolian plate boundary. A period of pre-Messinian compression has significantly deformed the western and southern part of the plateau area. Offshore continuation of onshore Cyprus lineaments attests the existence of a pre-Messinian structural link between Cyprus and the Hecataeus Rise. Owing to its relatively elevated position during the Messinian Salinity Crisis, the Hecataeus Rise experienced wide-spread Messinian erosion and only local deposition of evaporites which were precipitated within small, isolated sub-basins. Post-Messinian convergence was accommodated along the southeastern flank of the Hecataeus Rise, where NE–SW trending anticlinal structures experienced reactivation and significant growth. A prominent intra-Pliocene-Quaternary unconformity in the northwestern part of the plateau area may correlate with the Pliocene–Pleistocene transition and indicates the near synchronous occurrence of several tectonostratigraphic events. We suggest that these events represent a chain of structural and depositional changes initiated by incipient collision of Eratosthenes Seamount with Cyprus and the northwestern corner of the Hecataeus Rise. Collision-derived uplift of Cyprus resulted in vertical separation between Cyprus and the Hecataeus Rise and the development of a prominent unconformity in the northwestern part of the plateau area. Increasing the slopes adjacent to Cyprus facilitated more energetic downslope sediment transport, expressed by the development of sediment waves and the evolution of a prominent canyon structure at the northeastern limit of the plateau area.
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