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首页> 外文期刊>Journal of geodynamics >Tectonic evolution of the Soke Basin: Extension-dominated transtensional basin formation in western part of the Bueyuek Menderes Graben, Western Anatolia, Turkey
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Tectonic evolution of the Soke Basin: Extension-dominated transtensional basin formation in western part of the Bueyuek Menderes Graben, Western Anatolia, Turkey

机译：苏克盆地的构造演化：土耳其安那托利亚西部Bueyuek Menderes Graben西部以伸展为主的张应力盆地形成

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摘要

Integrated study on the stratigraphic and structural features of the Soke Basin on the western end of the Bueyuek Menderes Graben, Western Anatolia, has indicated that the tectonic evolution of Soke Basin includes extension-dominated transtension. At its western end, the EW-trending Bueyuek Menderes Graben tends to follow a zig-zag path influenced by zones of NE-SW-trending weakness in pre-rift crystalline rocks. The pre-existing fabric trends lie at angles up to 45-70° to the regional extension direction and are followed by extensional faults. The basin fill can be grouped into four major sequences separated by angular unconformities: (1) normal- to strike-slip-faulted Early-Middle Miocene alluvial fan-lacustrine sediments with economic coal beds, (2) folded and normal- to strike-slip-faulted Middle-Late Miocene lacustrine deposits intruded by volcanic rocks, (3) tilted Late Pliocene-Pleistocene alluvial fan-lacustrine carbonate deposits and shallow marine fan-delta deposits, and (4) undeformed Holocene alluvial, fluvial, and coastal sediments. The earliest sediments are interpreted, for the first time, to have been deposited in a supradetachment basin governed by the activity of an extensional detachment that separated metamorphic rocks in the footwall from ophiolitic nappes in the hangingwall. During the Middle-Late Miocene, high-angle faults cross-cut the low-angle detachment, and alluvial fans from lacustrine sediments were deposited under the control of an E-W-trending dip-slip normal fault and NE-SW-trending oblique-slip normal faults that formed an extensional basin. This activity was followed by normal to strike-slip-dominated deformation, leading to a highly complex mosaic of faults and fault-blocks, and fragmentation of the oldest basin-fill rock units. Finally, from Pleistocene until modern times, extensional forces have been in operation and have led to the reactivation of the Priene-Sazli fault, in front of which the Quaternary Soke-Milet Basin developed under the control of oblique extension. These results support an extension-dominated transtension that has existed since the Early Miocene in the western end of the Bueyuek Menderes Graben.
机译：对西安纳托利亚Bueyuek Menderes Graben西端的Soke盆地地层和结构特征的综合研究表明，Soke盆地的构造演化包括以伸展为主的构造。在其西端，EW趋势Bueyuek Menderes Graben倾向于遵循锯齿形路径，受裂谷前结晶岩中NE-SW趋势弱化带的影响。先前存在的织物趋势位于与区域延伸方向成45-70°的角度，然后是延伸断层。盆地填充物可分为四个主要序列，由角不整合面分开：（1）具有经济煤层的正中至走滑带断裂的中新世中早冲积扇形湖相沉积物，（2）折叠且正向至走动由火山岩侵入的中晚期中新世湖相滑坡沉积，（3）上新世-更新世冲积扇状湖相碳酸盐岩和浅海扇三角洲沉积物倾斜，（4）未变形的全新世冲积，河流和沿海沉积物。最早的沉积物被首次解释为沉积在上分离盆地中，该盆地受伸展分离活动的支配，该活动将下盘中的变质岩与上盘中的滑石质尿布分开。在中新世中晚期，高角度断层横切了低角度脱离层，湖沉积物的冲积扇在EW向倾滑正常断层和NE-SW向斜滑运动的控制下沉积。形成伸展盆地的正常断层。在此活动之后，法向变形达到了以走滑为主的变形，从而导致断层和断块的镶嵌非常复杂，最古老的盆地填充岩石单元也破碎了。最终，从更新世直到现代，伸展力量一直在起作用，并导致了普里涅-萨兹利断裂的复活，在此之前第四纪索克-米利特盆地在倾斜伸展的控制下发展起来。这些结果支持了自中新世早期以来在布尤耶克·曼德雷斯·格拉本（Bueyuek Menderes Graben）西端存在的以伸展为主的伸展作用。

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