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Reconciling the stratigraphy and depositional history of the Lycian orogen-top basins, SW Anatolia
Palaeobiodiversity and Palaeoenvironments ( IF 1.4 ) Pub Date : 2019-08-03 , DOI: 10.1007/s12549-019-00394-3
M. Cihat Alçiçek , Serdar Mayda , Johan H. ten Veen , Sarah J. Boulton , Thomas A. Neubauer , Hülya Alçiçek , Alexey S. Tesakov , Gerçek Saraç , H. Yavuz Hakyemez , Fikret Göktaş , Alison M. Murray , Vadim V. Titov , Gonzalo Jiménez-Moreno , Yeşim Büyükmeriç , Frank P. Wesselingh , Johannes M. Bouchal , F. Arzu Demirel , T. Tanju Kaya , Kazım Halaçlar , Melike Bilgin , Lars W. van den Hoek Ostende

Terrestrial fossil records from the SW Anatolian basins are crucial both for regional correlations and palaeoenvironmental reconstructions. By reassessing biostratigraphic constraints and incorporating new fossil data, we calibrated and reconstructed the late Neogene and Quaternary palaeoenvironments within a regional palaeogeographical framework. The culmination of the Taurides in SW Anatolia was followed by a regional crustal extension from the late Tortonian onwards that created a broad array of NE-trending orogen-top basins with synchronic associations of alluvial fan, fluvial and lacustrine deposits. The terrestrial basins are superimposed on the upper Burdigalian marine units with a c. 7 myr of hiatus that corresponds to a shift from regional shortening to extension. The initial infill of these basins is documented by a transition from marginal alluvial fans and axial fluvial systems into central shallow-perennial lakes coinciding with a climatic shift from warm/humid to arid conditions. The basal alluvial fan deposits abound in fossil macro-mammals of an early Turolian (MN11–12; late Tortonian) age. The Pliocene epoch in the region was punctuated by subhumid/humid conditions resulting in a rise of local base levels and expansion of lakes as evidenced by marsh-swamp deposits containing diverse fossil mammal assemblages indicating late Ruscinian (late MN15; late Zanclean) age. A second pulse of extension, accompanied by regional climatic changes, prompted subsequent deepening of the lakes as manifested by thick and laterally extensive carbonate successions. These lakes, which prevailed c. 1 myr, later shrank due to renewed progradation of alluvial fans and eventually filled up and dried out, reflected by marsh-swamp deposits at the top of a complete lacustrine succession that contains diverse micro-mammal assemblages indicating a latest Villanyian (MN17; Gelasian) age. A third pulse of tectonic reorganisation and associated extension dissected the basins into their present-day configuration from the early Pleistocene onwards under warm/humid climatic conditions. The new age data provide means to correlate deposits across various basins in the region that help to place the basin development into a regional tectonic framework, which can be attributed to the consequence of the well-articulated regional phenomena of slab-tear/detachment-induced uplift followed by crustal extension and basin formation (late Tortonian), the outward extension of the Aegean arc (early Pliocene) and eventually accompanied by westward extrusion of the Anatolian Plate (early Pleistocene).

中文翻译:

调和西南安那托利亚利西亚造山带顶盆的地层学和沉积历史

来自安纳托利亚西南盆地的陆地化石记录对于区域相关性和古环境重建均至关重要。通过重新评估生物地层学限制并结合新的化石数据,我们在区域古地理框架内校准和重建了晚期新近纪和第四纪古环境。在安纳托利亚西南部的Taurides达到高潮之后,从Tortonian晚期开始进行了区域性地壳扩展,形成了一系列NE趋势的造山带顶部盆地,并形成了冲积扇,河流和湖相沉积的共生联系。陆地盆地用c叠加在上布尔迪加利海洋单元上。7裂孔的中断,相当于从区域缩短到延伸的转变。从边缘冲积扇和轴向河流系统过渡到中央的浅多年生湖泊,伴随着气候从温暖/潮湿到干旱的转变,这些盆地的初始填充得到了记录。基土冲积扇沉积物存在于早Turolian(MN11-12; Tortonian晚期)时代的化石宏观哺乳动物中。该地区的上新世时代被半湿/湿条件打断,导致当地基础水平的上升和湖泊的扩张,这由沼泽沼泽沉积物所证实,沼泽沉积物包含不同的化石哺乳动物集合体,表明晚于鲁西尼期(MN15晚期; Zanclean晚期)。第二个扩展脉动,伴随着区域性的气候变化,促使湖泊随后的深化,这表现为浓密和横向广泛的碳酸盐岩演替。这些湖泊盛行c。1马币,后来由于冲积扇的重新发育而收缩,最终被填满并干dried,这反映在完整的湖相演替顶部的沼泽沼泽沉积物中,其中包含各种微哺乳动物组合,表明最近的比拉尼时代(MN17;格拉斯时代)。在温暖/潮湿的气候条件下,从早更新世开始,构造重组的第三次脉动和相关的伸展作用将这些盆地分解成现在的构造。新的年龄数据提供了使该地区各个盆地之间的沉积物相关联的手段,有助于将盆地发展置于区域构造框架中,这可以归因于板状撕裂/剥离引起的清晰区域现象的结果。隆升,之后是地壳伸展和盆地形成(晚Tortonian),
更新日期:2019-08-03
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