Effects of Fission-Track Angle to Crystallographic C Axis in Apatite on Thermal History
详细信息
- 责任者：Jiao Yaxian (Research Institute of Exploration and Development ; Huabei Oilfield Company ; PetroChina ; Renqiu 062552 ; China) ; Qiu Nansheng
- 刊名：Geoscience
- 出版年：2013
- 卷期：27(5)
- 关键词：裂变径迹计时 ; fission-track dating ; 磷灰石 ; apatite
- 页码：p.1131-1136
- 图表：6 illus., 1 table, 21 refs.
- 分类号：1300
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
Thermal histories modeled from apatite fission-track(FT)data are dependent upon the annealing behavior 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 fission-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 different angle to crystallographic C axis was discussed.This paper has showed that the largest difference of the maximum 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 thermal 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.