内蒙古大青山晚中生代以来的隆升--剥露过程

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±3.3Ma,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100~90Ma)和中?晚中新世(13.5~7Ma)以来两个快速抬升冷却阶段,13.5~7Ma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。...

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Bibliographic Details
Published inBeijing da xue xue bao Vol. 53; no. 1; pp. 57 - 65
Main Author 徐芹芹;季建清;赵文韬;于祥江
Format Journal Article
LanguageChinese
Published Beijing Acta Scientiarum Naturalium Universitatis Pekinenis 2017
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%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
Subjects
Apatite
Exhumation
Geomorphology
Mountains
中.晚中新世
大青山
磷灰石裂变径迹
隆升.剥露
Daqing Mountain
apatite fission track
中-晚中新世
隆升-剥露
Middle-Late Miocene
大青山
磷灰石裂变径迹
uplift-exhumation
Online AccessGet full text
ISSN0479-8023
DOI10.13209/j.0479-8023.2016.096

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Summary: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±3.3Ma,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100~90Ma)和中?晚中新世(13.5~7Ma)以来两个快速抬升冷却阶段,13.5~7Ma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。
Bibliography:Four bedrock samples,collected from the eastern segment of Daqing Mountain,were analyzed usingapatite fission-track(AFT)method.This elucidates the uplift-exhumation history of this area since the LateCretaceous-in particular,when the present geomorphology of Daqing Mountain was shaped.The AFT agesrange from57.7±3.8Ma to50.4±3.3Ma and the track length is between10.7±0.4μm and9.9±0.1μm.Modeling ofthe fission track data suggests two stages of rapid uplift and cooling,100?90Ma and since13.5?7Ma.The secondcooling stage(since13.5?7Ma)was characterized by the fast uplift-exhumation in this area,resulting in thepresent geomorphology of Daqing Mountain.
11-2442/N
apatite fission track; uplift-exhumation; Middle-Late Miocene; Daqing Mountain
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ISSN:0479-8023
DOI:10.13209/j.0479-8023.2016.096