Low Temperature Thermal History Reconstruction Based on Apatite Fission-Track Length Distribution and Apatite U-Th/He Age Using Low-T Thermo  

作　　者：Ruxin Ding 

机构地区：[1]Guangdong Provincial Key Lab of Geodynamics and Geohazards,School of Earth Sciences and Engineering,Sun Yat-Sen University,Zhuhai 519000,China [2]Guangdong Provincial Key Lab of Mineral Resources and Geological Processes and Mineral Resources,Zhuhai 519000,China [3]Low-T Lab,Shanghai 201101,China

出　　处：《Journal of Earth Science》2023年第3期717-725,共9页地球科学学刊（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.42072229,41102131);the Fundamental Research Fund for the Central Universities of China(No.12lgpy22);the Guangdong Natural Science Foundation(No.2021A1515011658);the Science and Technology Program of Guangzhou(No.202002030184);the China Scholarship Council。

摘　　要：Low temperature thermochronology plays a key role in the study of the tectonic evolution of the upper crust.History modeling of apatite fission-track requires the apparent age and the confined track-length distribution of spontaneous tracks.Obtaining length data does not require either thermal neutron irradiation or LA-ICP-MS measurements of the uranium content of the grains.This paper attempts to decouple the apatite fission-track age from the apatite fission-track length,but to combine the fission-track lengths with the respective apatite U-Th/He age to model the thermal history.The experiments were designed and conducted using a new Mathematica®modeling software“Low-T Thermo”.Results of this modeling show that the thermal history modeling of apatite U-Th/He and fission-track ages can constrain the apatite fission-track length thermal history in the He partial retention zone and fission-track partial annealing zone,respectively.It implies that this combination of apatite fissiontrack length and apatite U-Th/He age has not been implemented before but is presented here as an alternative way of determining thermal histories without the addition of apatite fission-track age.

关 键 词：thermal history modeling APATITE fission track U-Th/He tectonics 

分 类 号：P314[天文地球—固体地球物理学] P597.3[天文地球—地球物理学]