Eurasia Institute of Earth Sciences, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey.
Department of Earth Sciences, University of Toronto, Toronto, ON, Canada, M5S 3B1.
Nat Commun. 2017 Nov 16;8(1):1538. doi: 10.1038/s41467-017-01611-3.
Lithospheric drips have been interpreted for various regions around the globe to account for the recycling of the continental lithosphere and rapid plateau uplift. However, the validity of such hypothesis is not well documented in the context of geological, geophysical and petrological observations that are tested against geodynamical models. Here we propose that the folding of the Central Anatolian (Kırşehir) arc led to thickening of the lithosphere and onset of "dripping" of the arc root. Our geodynamic model explains the seismic data showing missing lithosphere and a remnant structure characteristic of a dripping arc root, as well as enigmatic >1 km uplift over the entire plateau, Cappadocia and Galatia volcanism at the southern and northern plateau margins since ~10 Ma, respectively. Models show that arc root removal yields initial surface subsidence that inverts >1 km of uplift as the vertical loading and crustal deformation change during drip evolution.
岩石圈滴流已经在全球各个地区被解释为大陆岩石圈的再循环和高原快速抬升的原因。然而,在地质、地球物理和岩石学观测方面,这种假说的有效性并没有得到很好的记录,这些观测结果需要与地球动力学模型进行对比。在这里,我们提出中央安纳托利亚(克尔谢希尔)弧形褶皱导致岩石圈增厚,并开始出现“滴流”弧形根部。我们的地球动力学模型解释了地震数据,这些数据显示了缺失的岩石圈和滴流弧形根部的残余结构特征,以及整个高原、卡帕多西亚和加拉太火山活动在南部和北部高原边缘自~10 Ma 以来分别超过 1 公里的隆起之谜。模型表明,弧形根部的去除导致初始地表沉降,随着滴流演化过程中垂直载荷和地壳变形的变化,超过 1 公里的隆起会被反转。