川圹高原中生代以来隆升-剥露过程的磷灰石裂变径迹热年代学制约及意义

青藏高原东南缘的兰坪-思茅盆地与呵叻盆地现今被川圹高原（广泛发育古生代-早中生代花岗岩类侵入体）所分隔，两者均产出固体海相钾盐矿，且盐类矿物组合、元素地球化学特征及磁性地层年代基本一致，可能白垩纪成盐时期两者为统一的泛盆地，之后泛盆地解体。但两者资源量相差悬殊、缺乏分隔两者的川圹高原形成隆升的证据。本申请拟从盆山耦合角度，通过系列的川圹高原山体基岩及两侧中-新生代盆地沉积物的磷灰石裂变径迹热年代学研究，结合两侧盆地古水流、重矿物组合分析以及前人锆石U-Pb年龄资料，获取磷灰石裂变径迹、物源区和古水流变化信息，建立川圹高原中生代以来详细的构造隆升-剥露历史，为兰坪-思茅与呵叻盆地成钾盐时期是否存在泛盆地提供地貌约束。如果白垩纪存在统一盆地，则川圹高原的构造隆升-剥露历史就是统一盆地解体和演化过程。这对理解青藏高原东南缘构造变形（挤出）过程及云南钾盐资源的研究和勘探具有重要参考价值。

The Lanping-Simao basin and Khorat basin both developed the potash salt deposition, which is located at the southeastern Tibetan Plateau and separated by the Xiangkhoang Plateau (extensively distributed the Paleozoic - early Mesozoic granite intrusion). The basically consistent salt mineral assemblage, element geochemical characteristics and magnetostratigraphy seems to indicate that there may be a unified basin during the Cretaceous, then was separated. However, the quantity of resource is disparity. Especially, there is no evidence to the uplift of the Xiangkhoang Plateau. Based on the mountain-basin coupling, a series of apatite fission track chronology sequence of the Xiangkhoang Plateau and the Mesozoic - Cenozoic Lanping-Simao and Khorat basins will be presented in this study. Combined with the paleo-currents, assemblage of the heavy mineral and zircon U-Pb age data, the detailed tectonic uplift - exhumation history of the Xiangkhoang Plateau since the Mesozoic will be built, which can provide the geomorphic constraints to the Cretaceous pan basin in the Lanping-Simao and Khorat regions. If the unity of the Cretaceous basin existed, the tectonic uplift - exhumation history equaled to the process of the disintegration and evolution of the uniform basin. That can not only help understand the tectonic deformation (extrusion) of the southeastern Tibetan Plateau, also provide the direction to research and exploration of the potash salt resource in the Yunnan province.