Apatite Fission Track Thermochronology of Granite from the Xiazhuang Uranium Ore Field,South China:Implications for Exhumation History and Ore Preservation

SUN Yue ¹CHEN Zhengle ²PAN Jiayong ¹HUO Hailong ³LI Haidong ⁴SUN Junjie ¹XU Guangchun¹

扫码查看

作者信息

1. State Key Laboratory of Nuclear Resources and Environment,School of Earth Sciences,East China University of Technology,Nanchang 330013,China
2. State Key Laboratory of Nuclear Resources and Environment,School of Earth Sciences,East China University of Technology,Nanchang 330013,China;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China
3. Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China
4. State Key Laboratory of Nuclear Resources and Environment,School of Earth Sciences,East China University of Technology,Nanchang 330013,China;No.290 Research Institute,CNNC,Shaoguan,Guangdong 512029,China
折叠

Abstract

Xiazhuang uranium ore field,located in the southern part of the Nanling Metallogenic Belt,is considered one of the largest granite-related U regions in South China.In this paper,we contribute new apatite fission track data and thermal history modeling to constrain the exhumation history and evaluate preservation potential of the Xiazhuang Uranium ore field.Nine Triassic outcrop granite samples collected from different locations of Xiazhuang Uranium ore field yield AFT ages ranging from 43 to 24 Ma with similar mean confined fission track lengths ranging from 11.8±2.0 to 12.9±1.9 μm and Dpar values between 1.01 and 1.51 μm.The robustness time-temperature reconstructions of samples from the hanging wall of Huangpi fault show that the Xiazhuang Uranium ore field experienced a time of monotonous and slow cooling starting from middle Paleocene to middle Miocene(～60-10 Ma),followed by relatively rapid exhumation in the late Miocene(～10-5 Ma)and nearly thermal stability in the Pliocene-Quaternary(～5-0 Ma).The amount of exhumation after U mineralization since the Middle Paleogene was estimated as～4.3±1.8 km according to the integrated thermal history model.Previous studies indicate that the ore-forming ages of U deposits in the Xiazhuang ore field are mainly before Middle Paleocene and the mineralization depths are more than 4.4±1.2 km.Therefore,the exhumation history since middle Paleocene plays important roles in the preservation of the Xiazhuang Uranium ore field.

Key words

apatite fission track/exhumation history/ore preservation/Xiazhuang Uranium ore field/South China

引用本文复制引用

基金项目

Foundation of State Key Laboratory of Nuclear Resources and Environment(NRE2021-01)

Foundation of State Key Laboratory of Nuclear Resources and Environment(2022NRE34)

National Natural Science Foundation of China(42162013)

Third Xinjiang Scientific Expedition Program(2022xjkk1301)

Fund of National Key Laboratory of Science and Technology on Remote Sensing Information and imagery Analysis,Beijing Researc(6142A01210405)

出版年

2024

地质学报(英文版)

中国地质学会

地质学报(英文版)

CSTPCD

影响因子：1.414

ISSN：1000-9515

参考文献量73

段落导航