| Tectonic uplift history of the Yitong Basin since the Oligocene,Northeast China：Evidence from apatite fission track ages and geological relationship |
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| 作者单位： | Key Laboratory of Tectonics and Petroleum Resources,China University of Geosciences,Ministry of Education,Wuhan 430074,China |
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| 摘 要： |
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| 关 键 词： | 裂变径迹年龄 地质证据 隆升历史 盆地构造 磷灰石 渐新世 东北 中国 |
| 收稿时间： | 20 October 2004 |
Tectonic uplift history of the Yitong Basin since the Oligocene,Northeast China: Evidence from apatite fission track ages and geological relationship |
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| Authors: | Qiang Cao Jiaren Ye Chuanbo Shen Daqing Tang |
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| Institution: | Key Laboratory ofTectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074, China |
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| Abstract: | The Yitong Basin is an oil-bearing basin with unique characteristics in Northeast China. On the basis of apatite fission track ages and geological relationship, the tectonic uplift history of the Yitong Basin since the Oligo-cene was discussed. Based on apatite fission track analysis of five samples from the Luxiang and Chaluhe fault de-pressions and basin modeling study, it can be concluded that since the Oligocene (36.6 Ma) in the Yitong Basin, the Chaluhe fault depression has undergone two episodes of uplift during 24.9–19.1 Ma and 6.9–4.9 Ma. And the Luxi-ang fault depression also had undergone two episodes of uplift during 30–27.8 Ma and 22.6–11.1 Ma. Moreover, the average apparent exhumation rates for the Chaluhe fault depression and Luxiang fault depression, could be calcu-lated to be 70.34 and 60.33 m/Ma since 21.8 Ma and 18.9 Ma, respectively. The results of thermochronological analysis can also be supported by the evidence from geological relationships such as geodynamics, volcanic activity, and stratigraphic division and correlation. |
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| Keywords: | tectonic uplift fission track apatite the Oligocene the Yitong Basin |
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