摘要
裂变径迹(FT)技术是根据矿物中铀裂变产生的辐射损伤特性进行分析的低温热年代技术。随着对FT退火行为和实验退火模型研究的深入,使得这一技术成为约束沉积盆地低温热历史的重要手段。Laslett等、Crowley等和Ketcham等先后提出3个重要的磷灰石FT实验退火模型,其中以Ketcham等的退火模型研究最为深入,它分析了磷灰石类型、时间、温度和化学成分对其径迹退火的影响,使用c轴投射径迹长度和Dpar等参数,形成了描述磷灰石FT多元动力学退火的数学模型。锆石FT与U-Th/He技术、Ro值、地表温度和地层年龄等,均是约束磷灰石FT热历史重建的重要约束条件,HeFTy(2009)是进行低温热历史模拟的主要软件之一。
Fission-track（FT） thermochronology is a low-temperature dating technique utilizing the damage property produced by uranium fission decay.As the advanced researches of annealing behavior,and laboratory annealing models,this technique,especially apatite fission-track,has become an important measure to constrain the thermal history of sedimentary basin.Among three main apatite fission-track annealing models proposed by Laslett et al.（1987）,Crowley et al.（1991） and Ketcham et al.（1999）,respectively,the last one is the most significant and widely-applied annealing model,which integrated the influence of time,temperature and chemical composition to various types of apatite,together using the c-axis projected track-length and Dpar.This apatite multi-kinetic fission-track annealing model by Ketcham et al.（1999） can be applied well to make thermal modeling,describing the temperature-time relation in the development of basin.Zircon FT,（U-Th）/He,apatite（U-Th）/He,Ro value,surface temperature,and stratigraphic age are all as constraints for fission-track thermal modeling,while the HeFTy（2009） is an excellent software for reconstruction of low-temperature thermal history.
出处
《华南地质与矿产》
CAS
2012年第2期93-99,共7页
Geology and Mineral Resources of South China
关键词
裂变径迹
退火模型
磷灰石
盆地热历史
fission track
annealing model
Apatite
thermal history of basin
