CAJ | 학술논문

磷灰石裂变径迹退火行为是磷灰石裂变径迹技术模拟热历史的基础，退火程度的不同会导致径迹的长度不同，其中退火的各向异性（与结晶C轴夹角不同退火行为不同）是导致长度差异的重要因素。首先利用C轴投影模型将任意夹角的径迹转化成与C轴平行的径迹，以此消除分布方位的影响，进而探讨实际测量长度相同而分布方位不同的径迹模拟的热历史之间的差异。研究结果表明，磷灰石裂变径迹与结晶 C轴夹角不同揭示的最高古地温之间最大差异为15℃，用来研究剥蚀量和年轻造山带冷却抬升速率引起的最大差异可分别达到430 m及1.5℃/Ma，揭示构造抬升事件的初始抬升时间最大可相差2Ma。因此，在实际模拟热历史时应注意该参数的影响，准确测量磷灰石裂变径迹与结晶C轴的夹角将有助于提高模拟热历史的精度。
린회석렬변경적퇴화행위시린회석렬변경적기술모의열역사적기출，퇴화정도적불동회도치경적적장도불동，기중퇴화적각향이성（여결정C축협각불동퇴화행위불동）시도치장도차이적중요인소。수선이용C축투영모형장임의협각적경적전화성여C축평행적경적，이차소제분포방위적영향，진이탐토실제측량장도상동이분포방위불동적경적모의적열역사지간적차이。연구결과표명，린회석렬변경적여결정 C축협각불동게시적최고고지온지간최대차이위15℃，용래연구박식량화년경조산대냉각태승속솔인기적최대차이가분별체도430 m급1.5℃/Ma，게시구조태승사건적초시태승시간최대가상차2Ma。인차，재실제모의열역사시응주의해삼수적영향，준학측량린회석렬변경적여결정C축적협각장유조우제고모의열역사적정도。
Thermal histories modeled from apatite fission-track(FT)data are dependent upon the annealing beha-vior of apatite fission-tracks.It has been confirmed that the rate of fission-track annealing correlates with apatite structure and the annealing rate is faster for fission-tracks with higher angle to crystallographic C axis,so different rates of fission-track annealing will eventually lead to different length distributions.In this study,the apatite fis-sion-track length C axis projection model was used to eliminate the effects of different angles to crystallographic C axis,and then the difference of thermal histories modeled from apatite fission-tracks with the same length and dif-ferent angle to crystallographic C axis was discussed.This paper has showed that the largest difference of the maxi-mum palaeo-geotemperatures among the modeling history is 15 ℃,and the largest difference in the erosion amount,cooling uplift rate and initial uplift time is 430 m and 1.5 ℃/Ma,respectively.And the result reveals that the largest difference of initial uplift time in each tectonic movement can reach up to 2 Ma.In the actual ther-mal history simulation,we should pay more attention to the influence of this parameter.Ideally,the angles of each apatite fission-track to crystallographic C axis should be measured to improve the thermal history precision.