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首页> 外文期刊>Journal of Asian earth sciences >Distant effects of India-Eurasia convergence and Mesozoic intracontinental deformation in Central Asia: Constraints from apatite fission-track thermochronology
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Distant effects of India-Eurasia convergence and Mesozoic intracontinental deformation in Central Asia: Constraints from apatite fission-track thermochronology

机译：中亚印度-欧亚大陆辐合和中生代陆内变形的远距离影响：磷灰石裂变径迹热年代学的约束

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摘要

During the Mesozoic, the active southern margin of Eurasia was the site of several accretion and collision events that fit into a framework of convergence between Eurasia and advancing (peri-) Gondwanan units. Far-field effects of the Mesozoic Mongol-Okhotsk and Cimmerian orogenies have been recorded deep within the interior of Eurasia. Convergence finally culminated in the massive India-Eurasia continent-continent collision in the Early Cenozoic. This collision, continued convergence between both continents, and resulting ongoing indentation of India into Eurasia have dominated the geological, tectonic and geodynamic evolution of Eurasia. Amongst others, distant effects of these events have reactivated an array of mobile belts in Central Asia. Apatite fission-track dating and thermal history modeling performed on samples from the Kyrgyz Tien Shan and Siberian Altai Mountains record both Mesozoic deformation and Cenozoic reactivation of intracontinental Eurasia. The onset of the building and growth of the modern Tien Shan and Altai orogens is constrained to the Late Miocene and Pliocene, with a likely trend of activity younger towards the north. This would underscore the general model that deformation related to India-Eurasia convergence was progressively propagated northwards through Central Asia via the inherited structural fabric of the Eurasian crust.
机译：在中生代期间，欧亚大陆的活跃南部边缘是几次吸积和碰撞事件的发生地，这些事件都与欧亚大陆和前进的（近）冈瓦纳单元的融合框架相吻合。欧亚大陆内部深处记录了中生代蒙古-鄂霍次克和西米利亚造山带的远场效应。融合最终达到了新生代早期印度-欧亚大陆与大陆的大规模碰撞。这次碰撞，两大洲之间的持续融合以及由此导致的印度不断向欧亚大陆进发，已经主导了欧亚大陆的地质，构造和地球动力学演变。其中，这些事件的遥远影响重新激活了中亚的一系列流动带。在吉尔吉斯斯坦天山和西伯利亚阿尔泰山的样品上进行的磷灰石裂变径迹测年和热历史模拟记录了大陆内欧亚大陆的中生代变形和新生代活化。现代的天山造山带和阿尔泰造山带的建造和发展的开始仅限于中新世晚期和上新世，活动的趋势可能是向北年轻。这将强调一般的模型，即与印度-欧亚大陆融合有关的变形是通过欧亚地壳的继承构造结构逐渐向北传播通过中亚的。

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