Late Cenozoic cooling history of the central Menderes Massif: Timing of the Büyük Menderes detachment and the relative contribution of normal faulting and erosion to rock exhumation
Late Cenozoic cooling history of the central Menderes Massif: Timing of the Büyük Menderes detachment and the relative contribution of normal faulting and erosion to rock exhumation
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门德雷斯地块中部新生代晚期的冷却历史：Büyük Menderes 分离的时间以及正常断层和侵蚀对岩石折返的相对贡献
DOI：
10.1016/j.tecto.2017.07.004
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发表时间：
2017
期刊：
影响因子：
2.9
通讯作者：
Christl
中科院分区：
文献类型：
--
作者：
Wölfler;Glotzbach;Heineke;Nilius;Hetzel;Hampel;Christl
基于新的热年代学数据和土耳其西部门德雷斯地块(Aydın地块)南部10Be的侵蚀速率，我们对经历大陆活动伸展的地区的构造演化和景观发展提供了新的见解。裂变径迹和(U-Th)/He数据显示，Büyük Menderes拆离体的下盘经历了两次强化冷却和折返。假定地温梯度升高约50℃/km，第一阶段的平均速率为中新世~0.90℃/Myr，第二阶段为中新世末期和上新世，平均速率为~0.43℃/myr。这两个阶段之间的折返速率较低，根据距离的不同，折返速度在~0.14~~0.24 KM/Myr之间。Aydın区块的集水区基于宇宙成因核素的侵蚀速率从约0.1百万公里/百万米到约0.4百万公里/百万米不等。Aydın地块两侧(北侧和南侧)的侵蚀速率的相似性表明，全新世期间存在一种相当对称的侵蚀模式。如果这些千年侵蚀速率在一百万年的时间尺度上具有代表性，那么它们表明，除了正常的断裂作用外，Büyük Menderes拆离断层上盘的侵蚀也有助于变质岩的折返。
Based on new thermochronological data and10Be-derived erosion rates from the southern part of the central Menderes Massif (Aydın block) in western Turkey, we provide new insights into the tectonic evolution and landscape development of an area that undergoes active continental extension. Fission-track and (U-Th)/He data reveal that the footwall of the Büyük Menderes detachment experienced two episodes of enhanced cooling and exhumation. Assuming an elevated geothermal gradient of ~ 50 °C/km, the first phase occurred with an average rate of ~ 0.90 km/Myr in the middle Miocene and the second one in the latest Miocene and Pliocene with a rate of ~ 0.43 km/Myr. The exhumation rates between these two phases were lower and range from ~ 0.14 to ~ 0.24 km/Myr, depending on the distance to the detachment. Cosmogenic nuclide-based erosion rates for catchments in the Aydın block range from ~ 0.1 to ~ 0.4 km/Myr. The similarity of the erosion rates on both sides of the Aydın block (northern and southern flank) indicate that a rather symmetric erosion pattern has prevailed during the Holocene. If these millennial erosion rates are representative on a million-year timescale they indicate that, apart from normal faulting, erosion in the hanging wall of the Büyük Menderes detachment fault did also contribute to the exhumation of the metamorphic rocks.
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