| 内蒙古大青山晚中生代以来的隆升-剥露过程 |
| |
| 引用本文： | 徐芹芹,季建清,赵文韬,于祥江.内蒙古大青山晚中生代以来的隆升-剥露过程[J].北京大学学报(自然科学版),2017,53(1). |
| |
| 作者姓名： | 徐芹芹 季建清 赵文韬 于祥江 |
| |
| 作者单位： | 1. 中国地质科学院地质研究所，北京 100037; 造山带与地壳演化教育部重点实验室，北京大学地球与空间科学学院，北京 100871;2. 造山带与地壳演化教育部重点实验室，北京大学地球与空间科学学院，北京 100871 |
| |
| 基金项目： | 国家重点基础研究发展计划，中国地质调查局项目 |
| |
| 摘 要： | 对大青山东段4件基岩样品进行磷灰石裂变径迹研究,获得该区晚中生代以来的隆升?剥露历史,并探讨大青山现代地貌的形成。样品的磷灰石裂变径迹年龄为57.7±3.8~50.4±3.3 Ma,封闭径迹长度分布在10.7±0.4~9.9±0.1μm之间。热历史模拟结果表明,大青山地区存在晚白垩世(约100~90 Ma)和中?晚中新世(13.5~7 Ma)以来两个快速抬升冷却阶段,13.5~7 Ma以来是本区剥露最快的时期,这一阶段的隆升造就现今大青山的地貌格局。
|
| 关 键 词： | 磷灰石裂变径迹 隆升-剥露 中-晚中新世 大青山 |
Uplift-Exhumation History of Daqing Mountain,Inner Mongolia Since Late Mesozoic |
| |
| XU Qinqin,JI Jianqing,ZHAO Wentao,YU Xiangjiang.Uplift-Exhumation History of Daqing Mountain,Inner Mongolia Since Late Mesozoic[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2017,53(1). |
| |
| Authors: | XU Qinqin JI Jianqing ZHAO Wentao YU Xiangjiang |
| |
| Abstract: | Four bedrock samples, collected from the eastern segment of Daqing Mountain, were analyzed using apatite fission-track (AFT) method. This elucidates the uplift-exhumation history of this area since the Late Cretaceous — in particular, when the present geomorphology of Daqing Mountain was shaped. The AFT ages range from 57.7±3.8 Ma to 50.4±3.3 Ma and the track length is between 10.7±0.4μm and 9.9±0.1μm. Modeling of the fission track data suggests two stages of rapid uplift and cooling, 100-90 Ma and since 13.5-7 Ma. The second cooling stage (since 13.5-7 Ma) was characterized by the fast uplift-exhumation in this area, resulting in the present geomorphology of Daqing Mountain. |
| |
| Keywords: | apatite fission track uplift-exhumation Middle-Late Miocene Daqing Mountain |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
