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Late Palaeozoic-Neogene sedimentary and tectonic development of the Tauride continent and adjacent Tethyan ocean basins in eastern Turkey: new data and integrated interpretation
Journal of Asian Earth Sciences ( IF 3 ) Pub Date : 2021-06-04 , DOI: 10.1016/j.jseaes.2021.104859
Alastair Harry Forbes Robertson , Osman Parlak , Timur Ustaömer , Kemal Taslı , Paulian Dumitrica

The eastern Taurus exemplifies continental rifting, passive margin development, Late Cretaceous melange genesis and ophiolite emplacement. Following Triassic rifting, a carbonate platform developed near sea level in the south (Munzur unit), whereas its northern extension (Neritic-pelagic unit) subsided into deep water during Late Jurassic-Late Cretaceous. Triassic-Cretaceous deep-water sediments and volcanics restore as distal deep-water slope/base of slope units. Jurassic-Cretaceous basic volcanics, interbedded with pelagic sediments, represent emplaced oceanic seamounts. Supra-subduction zone ophiolites formed to the north (c. 93 Ma), probably within an Inner Tauride ocean, and were emplaced southwards by trench-margin collision during latest Cretaceous (c. 75-66 Ma). The margin underwent flexural uplift/erosion and then subsidence/foredeep-infill. Part of the Tauride continent in the south (Malatya Metamorphics) deeply underthrust/subducted northwards, then exhumed rapidly by the late Maastrichtian (c. 65 Ma). To the south, oceanic lithosphere (e.g. Göksun ophiolite) was thrust northward beneath Tauride (Malatya) crust from a more southerly oceanic basin (Berit ocean), and intruded by Late Cretaceous subduction-related granitic rocks (88-82 Ma). Allochthonous units were assembled during the latest Cretaceous, followed by thick-skinned folding/thrusting, generally southwards, related to regional collision tectonics during Mid-Late Eocene. Part of the unmetamorphosed Tauride platform and its over-riding Late Cretaceous allochthon were apparently displaced >60 km northeastwards. Mid-Late Miocene regional collision drove variable folding and re-thrusting, in places northwards. Regional comparisons suggest that the Tauride carbonate platform (Geyik Dağ) narrowed eastwards, such that the palaeogeography of the E Taurides differed from farther west, influencing the late Mesozoic-Cenozoic structural development.



中文翻译:

土耳其东部陶里德大陆和邻近特提斯洋盆的晚古生代-新近纪沉积和构造发展:新数据和综合解释

金牛座东部是大陆裂谷、被动边缘发育、晚白垩世混杂岩成因和蛇绿岩侵位的例证。三叠纪裂谷作用后,南部(蒙祖尔单元)近海平面发育碳酸盐台地,而其北部延伸部(浅海-远洋单元)在晚侏罗世-晚白垩世沉入深水中。三叠系-白垩系深水沉积物和火山岩恢复为远侧深水斜坡/斜坡单元的底部。侏罗纪-白垩纪基性火山岩与远洋沉积物互层,代表了就位的大洋海山。超俯冲带蛇绿岩形成于北部(约 93 Ma),可能位于内部 Tauride 海洋内,并在晚白垩世(约 75-66 Ma)期间通过海沟边缘碰撞向南移动。边缘经历弯曲隆起/侵蚀,然后下沉/前深填充。南部 Tauride 大陆的一部分(Malatya Metamorphics)向北深冲/俯冲,然后被马斯特里赫特晚期(约 65 Ma)迅速挖掘。在南部,大洋岩石圈(例如 Göksun 蛇绿岩)从更偏南的大洋盆地(贝里特洋)向北推进到陶里德(Malatya)地壳下方,并被晚白垩世俯冲相关的花岗岩侵入(88-82 Ma)。外来单元是在白垩纪晚期组装的,随后是厚皮褶皱/冲断,通常向南,与中晚始新世的区域碰撞构造有关。部分未变质的 Tauride 地台及其上覆的晚白垩世异地生物明显向东北方向移动了 60 公里以上。中-晚中新世区域碰撞在向北的地方驱动了可变的折叠和再推力。区域比较表明,陶里德碳酸盐台地 (Geyik Dağ) 向东变窄,使得陶里德 E 的古地理与较远的西部不同,影响了晚中生代-新生代的构造发育。

更新日期:2021-06-05
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