Fission Track Dating of Apatite Constrains on the Cenozoic Uplift of the Altyn Tagh Mountain
Fission Track Dating of Apatite Constrains on the Cenozoic Uplift of the Altyn Tagh Mountain
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发表时间：
2001
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通讯作者：
C. Zhengle
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作者：
C. Zhengle
阿尔金山的片麻岩和花岗岩样品通过磷灰石的裂变径迹测年。测得的年龄为35.6~13.6 Ma，表明阿尔金山隆升始于渐新世，一直持续到中新世。早期隆升速率很低，后期可能发生快速隆升，区域地质、构造演化和沉积层序为其提供了支撑。结果表明，山体的局部隆升还受控于山内的北东向断裂。由于山体的抬升可能只与阿尔金断裂的走滑有关，作者认为该断裂左行走滑的初始时代应为渐新世。区域资料还表明，青藏高原北缘的山脉在渐新世-中新世期间发生了大规模的区域隆升。
samples of gneiss and granite from the Altyn Tagh Mountain are dated by fission track of apatite. The result yields ages from 35.6 Ma to 13.6 Ma, which suggests that the uplift of the Altyn Tagh mountain began from Oligocene and lasted till Miocene. During the early stage, the uplift rate was very low, and probably a quick uplift occurred later, which is supported by regional geology, structure evolution and sedimentary sequences. The result indicates that the local uplift of the mountain was also controlled by some NEE-trending faults within the mountain. As the uplift of the mountain was probably only related to the strike-slip of the Altyn Tagh fault, the authors hold that the initial age of the left-lateral strike-slip of the fault should have been Oligocene. Regional data also show that a large-scale regional uplift of mountains in the northern edge of the Qinghai-Tibetan plateau occurred during Oligocene-Miocene period.