| Fission track evidence for the Mesozoic Cenozoic tectonic uplift of Mt. Bogda, Xinjiang, Northwest China |
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| 作者姓名： | 沈传波 梅廉夫 彭蕾 张士万 刘麟 汤济广 |
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| 作者单位： | China University of Geosciences，China University of Geosciences，China University of Geosciences，Jianghan Oilfield Company SINOPEC，Jianghan Oilfield Company SINOPEC，China University of Geosciences，Wuhan 430074 China Wuhan 430074 China Wuhan 430074 China，Qianjiang 433124 China Qianjiang 433124 China Wuhan 430074 China |
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| 基金项目： | The authors are most grateful to Prof. Yuan Wanming with the Institute of High Energy Physics of Chinese Academy of Sciences, for his help with fission track analysis; Shu Liangshu with Nanjing University for his instructive discussion. |
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| 摘 要： | 1 IntroductionThe Mesozoic-Cenozoic tectonic evolution and ki-netics mechanism of the intracontinental orogen are thekey subjects of continental dynamics (Ma Zongjin andGao Xianglin, 2004) and the key to understanding theregional geological tectonics (Qia…
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| 关 键 词： | 裂变途径 中生代 新生代 地质时期 新疆 |
Fission track evidence for the Mesozoic-Cenozoic tectonic uplift of Mt. Bogda, Xinjiang, northwest China |
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| Chuanbo Shen,Lianfu Mei,Lei Peng,Shiwan Zhang,Lin Liu,Jiguang Tang.Fission track evidence for the Mesozoic Cenozoic tectonic uplift of Mt. Bogda, Xinjiang, Northwest China[J].Chinese Journal of Geochemistry,2006,25(2):143-151. |
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| Authors: | Chuanbo Shen Lianfu Mei Lei Peng Shiwan Zhang Lin Liu Jiguang Tang |
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| Institution: | (1) China University of Geosciences, 430074 Wuhan, China;(2) Jianghan Oilfield Company, SINOPEC, 433124 Qianjiang, China |
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| Abstract: | Fission-track dating evidence from 5apatite samples and 4 zircon samples, and modeled time-temperature thermal history indicate that since Late Jurassic-Cretaceous (150 -106 Ma), the uplift process of Mt. Bogda can be divided into four stages of thermal evolution: 150 - 106, 75 -65, 44 -24and 13 -9 Ma. Before 44- 24 Ma, the cooling rate and uplifting rate of the southern and northern segments of Mt. Bogda are almost the same, showing that the uplifting of Mt. Bogda is an overall process.Since 44 - 24 Ma, the uplifting of the southern and northern segments of Mt. Bogda has shown differences. During 42 - 11 Ma, the northern segment of Mt. Bogda was at a steady stage, with the cooling rate being 0.03℃/Ma and the uplifting rate being 0. 001 mm/a. From 11 Ma to the present, the northern segment of Mt. Bogda was at a rapid cooling and uplifting stage, with the cooling rate being 5.72℃/Ma and the uplifting rate being 0.19 mm/a. However, the southern segment of Mt. Bogda has been at a rapid cooling and uplifting stage since 26 Ma, with the cooling rate being 1.24℃/Ma and the uplifting rate being 0.041 mm/a during 26 -9 Ma; 4.88℃/Ma and 0. 163 mm/a from 9 Ma till now. |
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| Keywords: | fission track thermal history uplift Mesozoic-Cenozoic Mt Bogda |
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