An early Cenozoic tectonic event in eastern Kunlun Orogen, evidence from detrital fission track geochronology

被引：15
|
作者：
Wang A. [1 ,2 ]
Wang G.-C. [1 ,2 ]
Zhang K.-X. [1 ,3 ]
Garver I.J. [4 ]
机构：
[1] Faculty of Earth Sciences, China University of Geosciences
[2] State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences
[3] Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, China University of Geosciences
[4] Geologic Department of Union College
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2010年 / 35卷 / 05期
关键词：
Cenozoic; Eastern Kunlun Orogen; Fission track; Tectonic uplift;
D O I：
10.3799/dqkx.2010.088
中图分类号：
学科分类号：
摘要：
The eastern Kunlun Orogen, as a southernmost morphotectonic transition belt of northward attenuation in topographic relief across the northern Tibetan plateau, is a key area in examining and recovering the processing and mechanisms of the far-field lithospheric deformation. In this paper, we try to illustrate the Early Cenozoic tectonic processing in the eastern Kunlun Orogen based on a systematic detrital zircon fission track (ZFT) study. It is indicated that widely distributed pre-Cenozoic strata in the study area experienced a ZFT differential resetting (~300-200°C) at around Paleocene-Eocene postdating their burying. Binomial fitting for the single grain ages yielded youngest peak ages (P1) that mainly fall between 42-59 Ma, which corresponds to a ceasing timing for the differential resetting of detrital, Regional thermal history. Relevant data concordantly suggest that the eastern Kunlun Orogen experienced a regional tectonic uplift in Paleocene-Eocene, which coincides with the timing of the Indian-Asian collision, which implies that the Kunlun Orogen occurred as a deformation frontier instantly as the Indian plate collided with Asian plate. Our study provides an evidence that the Tibetan lithosphere (or curst) deformation at early stage is essentially of rigid plate, rather than the present day of significant continuous deformation, which might be a combined result by several mechanisms of lithospheric layers thickened respectively.
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页码：737 / 746
页数：9
相关论文
共 52 条
  • [1] Bai D.Y., Meng D.B., Liu Y.R., Et al., Apatite fission-track records of the tectonic uplift of the central segment of the Kunlun Mountains on the northern margin of the Qinghai-Tibet plateau, Chinese Geology, 30, 3, pp. 240-246, (2003)
  • [2] Bernet M., Garver J.I., Fission-track analysis of detrital zircon, Reviews in Mineralogy and Geochemistry, 58, 1, pp. 205-237, (2005)
  • [3] Brandon M.T., Decomposition of fission-track grain-age distributions, American Journal of Science, 292, pp. 535-564, (1992)
  • [4] Brandon M.T., Vance J.A., Tectonic evolution of the Cenozoic Olympic subduction complex, Washington State, as deduced from fission track ages for detrital zircons, American Journal of Science, 292, pp. 565-636, (1992)
  • [5] Dai S., Fang X.M., Song C.H., Et al., Early stage tectonic uplift of the northern Tibetan plateau, Chinese Science Bulletin, 50, 7, pp. 673-683, (2005)
  • [6] Dayem K.E., Molnar P., Clark M.K., Et al., Far-field lithospheric deformation in Tibet during continental collision, Tectonics, 28, (2009)
  • [7] England P.C., Houseman G.A., Osmaston M.F., Et al., The mechanics of the Tibetan plateau, Philosophical Transactions of the Royal Society of London (Series A), 326, 1589, pp. 301-320, (1988)
  • [8] Fang X.M., Zhang W.L., Meng Q.Q., Et al., High-resolution magnetostratigraphy of the Neogene Huaitoutala Section in the eastern Qaidam basin on the NE Tibetan plateau, Qinghai Province, China and its implication on tectonic uplift of the NE Tibetan plateau, Earth and Planetary Science Letters, 258, 1-2, pp. 293-306, (2007)
  • [9] Galbraith R.F., Green P.F., Estimating the component ages in a finite mixture, International Journal of Radiation Applications and Instrumentation (Part D), 17, 3, pp. 197-206, (1990)
  • [10] Garver J.I., Kamp P.J.J., Integration of zircon color and zircon fission-track zonation patterns in orogenic belts:application to the southern Alps, New Zealand, Tectonophysics, 349, 1-4, pp. 203-219, (2002)
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