天山艾维尔沟地区侏罗系热历史演化及其地质意义  被引量:1

Thermal History of the Jurassic Strata in the Ewirgol Area and its Geological Significance

在线阅读下载全文

作  者:张怀惠 张志诚[1] 汤文豪 唐建洲 ZHANG Huaihui;ZHANG Zhicheng;TANG Wenhao;TANG Jianzhou(MOE Key Laboratory of Orogenic Belts and Crustal Evolution,School of Earth and Space Sciences,Peking University,Beijing 100871,China;Information Center of the Ministry of Natural Resources,Beijing 100812,China)

机构地区:[1]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]自然资源部信息中心,北京100812

出  处:《大地构造与成矿学》2021年第3期431-443,共13页Geotectonica et Metallogenia

基  金:国家自然科学基金项目(41872202)资助。

摘  要:研究东天山和西天山过渡区域艾维尔沟地区的隆升剥露历史对于分析中新生代天山及其邻区的构造格局以及区域构造演化历史具有重要意义。本次研究通过对研究区出露的煤层(线)进行了镜质体反射率分析以及对应的顶板或底板的砂岩层进行了磷灰石裂变径迹系统分析,测试结果显示,研究区侏罗纪煤层镜质体反射率主要分布在0.79%~1.19%之间,相应的磷灰石裂变径迹年龄集中在79~129 Ma之间;热历史模拟表明,侏罗纪地层在早白垩世(130~100 Ma)达到最大埋深,并发生一次快速冷却事件,之后处于相对稳定期,新生代最终剥露到达地表。相比于西天山,艾维尔沟地区和东天山在早白垩世的隆升幅度大,使得天山东部发生强烈的构造运动,标志着早白垩世是东天山构造地貌形成关键时期。The uplift and denudation history of the transitional region between the eastern and western Tianshan is critical for the understanding of the tectonic framework of the Mesozoic-Cenozoic Tianshan and its adjacent areas as well as the regional tectonic evolution.The vitrinite reflectance was analyzed for the coal seam(line)in the Ewirgol area,and apatite fission track analysis was performed on the sandstone roof or floor of the coal seam.The results show that the vitrinite reflectance values of the Jurassic coal seam vary mainly in the range of 0.79%to 1.19%,and the corresponding apatite fission track ages are 79 Ma to 129 Ma.Thermal history simulation shows that the Jurassic strata reached the maximum burial depth in the early Cretaceous(130-100 Ma),followed by a rapid cooling process,and then were in a relatively stable period.Due to stratigraphic sedimentation,burial and hydrothermal events,the vitrinite reflectance in the Ewirgol area is significantly higher than that in the Aketaxi area.Compared with the western Tianshan,the Ewirgol area and the eastern Tianshan experienced stronger uplift in the Early Cretaceous related to the stronger tectonic movement in the eastern Tianshan.So,the Early Cretaceous was an important period for the formation of the tectonic landform.

关 键 词:艾维尔沟 裂变径迹 镜质体反射率 热历史 隆升剥露 

分 类 号:P542[天文地球—构造地质学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象