| Citation: | An WANG, Guocan WANG, Defan XIE, Demin LIU. Fission Track Geochronology of Xiaonanchuan Pluton and the Morphotectonic Evolution of Eastern Kunlun since Late Miocene. Journal of Earth Science, 2006, 17(4): 302-309.
|
Apatite fission track (AFT) thermochronology of seven samples from the Xiaonanchuan (小南川) pluton in the Kunlun (昆仑) pass area was carried out, for the purpose of determining the timing of cooling and the relation between the exhumation and the morphotectonic processes. The AFT ages yield low denudation rates of 0.020-0.035 mm/a during the late Miocene, which correspond to a stable geomorphic and weak tectonic uplifting environment. The low denudation rates can be considered as the approximate tectonic uplifting rates. The AFT geochronology shows paroxysmally rapid cooling since the Pliocene and an apparent material unroofing of more than 3 km in the Xiaonanchuan area. This was not the result of simple denudation. The rapid cooling was coupled with the intensive orogeny since the Pliocene, which was driven by tectonic uplifting. The accelerated relief building was accompanied by a series of faulting, which caused the basin and the valley formation and sinking. The space pattern of the AFT ages also shows differential uplifting, which decreases northwardly. This trend is supported by the regional AFT data, which indicate that the exhumation decreases northwardly in eastern Kunlun. This trend also exists in east-west orientation from the western Kunlun range to the eastern. The uplifting trend is also supported by geomorphic characteristics including the elevation and the relief differences as well as the distribution of the Late Cenozoic volcanism.
| Arne, D., Worley, B., Wilson, C., et al., 1997. Differential Exhumation in Response to Episodic Thrusting along the Eastern Margin of Tibetan Plateau. Tectonophysics, 280(3-4): 239-256 doi: 10.1016/S0040-1951(97)00040-1 |
| Bai, D. Y., Meng, D. B., Liu, Y. R., et al., 2003. Apatite Fission-Track Records of the Tectonic Uplift of the Central Segment of the Kunlun Mountains on the North Margin of Qinghai-Tibet Plateau. Geology in China, 30(3): 240-246 (in Chinese with English Abstract) |
| Chen, S. Y., Wang, S. M., Jin, Z. D., et al., 2004. Lake Sedimentary Records of Environmental Evolution in the Last 2.8 Ma from the Co Ngoin Basin, Central Qinghai-Xizang Plateau. Geochimica, 33 (2): 159-164 (in Chinese with English Abstract). |
| Chen, Z. L., Wan, J. L., Wang, X. F., et al., 2002. Rapid Strike-Slip of the Altyn Tagh Fault at 8 Ma and Its Geological Implications. Acta Geosicientia Sinica, 23 (4): 295-300 (in Chinese with English Abstract). |
| Claire, M., Nicolas, O. A., Jean-Marie, C., 1999. An Early Unroofing in Northeastern Tibet? Constraints from 40Ar/39Ar Thermochronology on Granitoids from the Eastern Kunlun Range (Qinghai, NWChina). Earth and Planetary Science Letters, 171 (1): 107-122. doi: 10.1016/S0012-821X(99)00133-8 |
| Cui, Z. J., Wu, Y. Q., Liu, G. N., et al., 1998. On Kunlun-Yellow River Tectonic Movement. Science in China (Series D), 28 (1): 53-59 (in Chinese). |
| Gleadow, A. J. W., Belton, D. X., Kohn, B. P., et al., 2002. Fission Track Dating of Phosphate Minerals and the Thermochronology of Apatite. In: Hughes, J., Kohn, M., Rakovan, J., eds., Phosphates-Reviews in Mineralogy and Geochemistry. Mineralogical Society of America and Geochemical Society, Washington, DC, United States, 48: 579-643 |
| Gleadow, A. J. W., Duddy, I. R., 1981. A Natural Long-Term Annealing Experiment for Apatite. Nuclear Tracks and Radiation Measurements, 5(1 -2): 169 -174 |
| Jolivet, M., Brunel, M., Seward, D., et al., 2001. Mesozoic and Cenozoic Tectonics of the Northern Edge of the Tibetan Plateau: Fission-Track Constraints. Tectonophysics, 343(1 -2): 111 -134 doi: 10.1016/S0040-1951(01)00196-2 |
| Lal, D., Harris, N. B. W., Sharma, K. K., et al., 2004. Erosion History of the Tibetan Plateau since the Last Interglacial: Constraints from the First Studies of Cosmogenic 10Be from Tibetan Bedrock. Earth and Planetary Science Letters, 217(1 -2): 33-42 doi: 10.1016/S0012-821X(03)00600-9 |
| Li, B. Y., 1996. Natural Environment of Hohxil Region in Qinghai. Science Press, Beijing. 24-28 (in Chinese). |
| Li, B. Y., Pan, B. T., Gao, H. S., 2002. A Planation Surface and Ages of Volcanic Rocks in Eastern Hohxil, Qinghai-Tibetan Plateau. Quaternary Sciences, 22 (5): 397-405 (in Chinese with English Abstract). |
| Li, J. J., Fang, X. M., Pan, B. T., et al., 2001. Late Cenozoic Intensive Uplift of Qinghai-Xizang Plateau and Its Impacts on Environments in Surrounding Area. Quaternary Sciences, 21 (5): 381-391 (in Chinese with English Abstract). |
| Naeser, C. W., Dodge, F. C. W., 1969. Fission Track Ages of Accessory Minerals from Granitic Rocks of the Central Sierra Nevada Batholoth, California. Geological Society of America Bulletin, 80 (11): 2201-2211. doi: 10.1130/0016-7606(1969)80[2201:FAOAMF]2.0.CO;2 |
| Pan, B. T., Gao, H. S., Li, J. J., 2002. On Problems of Planation Surface—A Discussion on the Planation Surfacein Qinghai-Xizang Plateau. Scientia Geographica Sinica, 22 (5): 520-526 (in Chinese with English Abstract). |
| Qinghai Geological Survey Institute, 2002. Regional Geological Survey Report of 1∶50000 Scale Wanbaogou Sheet (J46E024018), Meicaogou Sheet (I46E001017), Qingbanshisuzhan Sheet (I46E001018). 173-182 (in Chinese). |
| Wan, J. L., Wang, E. Q., 2002. FT Evidence of West Kunlun Uplift in Pulu. Nuclear Techniques, 25 (7): 565-567 (in Chinese with English Abstract). |
| Wang, F., Lo, C. H., Li, Q., et al., 2004. Onset Timing of Significant Unroofing around Qaidam Basin, Northern Tibet, China: Constraints from 40Ar/39Ar and FT Thermochronology on Granitoids. Journal of Asian Earth Sciences, 24 (1): 59-69. doi: 10.1016/j.jseaes.2003.07.004 |
| Wang, G. C., Xiang, S. Y., Garver, J. I., et al., 2003. Uplift and Exhumation during Mesozoic in Halaguole-Hatu Area, East Segment of Eastern Kunlun Mountains: Evidence from Zircon and Apatite Fission-Track Ages. Earth Science—Journal of China University of Geosciences, 28 (6): 645-652 (in Chinese with English Abstract). |
| Wang, G. C., Yang, W. R., Ma, H. D., et al., 2005. Comparing of the Tectonic Uplift since Late Cenozoic between the East and West Kunlun Mountains. Earth Science Frontiers, 12 (3): 157-166 (in Chinese with English Abstract). |
| Wang, J., 1998. Uplift of the Karibasheng and Kuzigan Granite in the West Kunlun Mountains—Evidence from Apatite Fission Track Analysis. Geological Review, 44 (4): 435-442 (in Chinese with English Abstract). |
| Wang, Q. L., Wang, J. H., Zhu, G. Z., et al., 2004. Vertical Deformations of the Eastern Kunlun Fault Zone and West of Kunlun Mountain Pass Ms 8.1 Earthquake. Seismology and Geology, 26 (2): 273-280 (in Chinese with English Abstract). |
| Wang, Y., Wan, J. L., Li, Q., et al., 2002. Fission-Track Evidence for the Cenozoic Uplift and Erosion of the Northern Segment of the Altyn Tagh Fault Zone at the Aksay-Dangjin Pass. Acta Geologica Sinica, 76 (2): 191-198 (in Chinese with English Abstract). |
| Wang, Y. B., Wang, J., Wang, S. C., 1998. Fission Track Evidence for Rapid Uplift of the Nyalam, Higher Himalaya, Tibet, China. Geological Review, 44 (4): 430-434 (in Chinese with English Abstract). |
| Wu, Y. Q., Cui, Z. J., Liu, G. N., et al., 2001. Quaternary Geomorphological Evolution of the Kunlun Pass Areaand Uplift of the Qinghai-Xizang (Tibet) Plateau. Geomorphology, 36 (3-4): 203-216. doi: 10.1016/S0169-555X(00)00057-X |
| Yuan, W. M., Wang, S. C., Li, S. R., et al., 2001. The Fission Track Evidence of Conformation Activity in Gangdise Belt, Tibet. Chinese Science Bulletin, 46 (20): 1739-1742 (in Chinese). doi: 10.1360/csb2001-46-20-1739 |
| Yuan, W. M., Zhang, X. T., Dong, J. Q., et al., 2004. Apatite Fission Track Evidence on the Uplifting of Eastern Kunlun Mountains. Atomic Energy Science and Technology, 38 (2): 166-168 (in Chinese with English Abstract). |
| Zhao, Z. D., Mo, X. X., Guo, T. Y., et al., 2003. Fission Track Ages of Pluton in South Tibet and Plateau Uplift. Advance in Natural Sciences, 13 (8): 877-880 (in Chinese). |
| Zhong, D. L., Ding, L., 1996. A Discussion on Uplift Procession and Its Dynamics of the Qinghai-Xizang (Tibet) Plateau. Science in China (Series D), 26 (4): 290-295 (in Chinese). |
Figures(3) / Tables(2)
Copyright © 2013-2020 Journal of Earth Science 鄂ICP备15021562号-2
Tel: +86-27-67885075 Fax: +86-27-67885075 E-mail: xbb@cug.edu.cn
Address: Editorial Office of Journal, China University of Geosciences, Yujiashan, Wuhan, Hubei 430074, P. R. China
Supported by:
Beijing Renhe Information Technology Co. Ltd
E-mail:
info@rhhz.net
DownLoad:
