【摘要】 裂变径迹技术是一种以磷灰石和锆石等矿物为定年对象的低温热年代学方法,特别适用于研究上地壳岩石冷却剥露的时间和过程。该技术在地学中的应用早期以定年为主,随着对裂变径迹长度分布特征与裂变径迹退火特性的深入研究,这种方法得到更广泛的应用,在此基础上综述了裂变径迹技术在下列构造演化问题中的应用和进展,包括:(1)造山带隆升时代及隆升速率的研究;(2)造山带热演化历史的研究;(3)快速蚀顶或冷却事件的年代确定;(4)盆地反转时代的确认;(5)盆地基底岩系构造热历史的研究;(6)盆山耦合过程的研究。更多还原

【Abstract】 Fission-track analysis as a geological dating tool was first proposed in the early 1960s. In the past decades there has been a major expansion in application to more general geological problems. It reflects progress in understanding the temperature dependence of fission-track annealing and in interpreting the information contained in fission-track length distributions. The length distribution of projected tracks can be successfully applied to thermal analysis despite the fact that it is heavily biased against the real length distribution. A partial track annealing concept based on the projected length distribution is proposed, which provides detailed information on the low-temperature thermal histories of rocks, below -120℃ for tracks in apatite and below -350℃ for zircon. Fission-track dating technique has been applied to a variety of tectonic problems, including:(1) to determine the uplifting time and rate of erogenic belt; (2) to study the thermal history of orogenic belt; (3) to date the rapid unroofing or cooling event; (4) to date the time of the basin inversion; (5) to unravel a long-term multi-event thermal record in basement rocks of the basin; and (6) to research the coupling process between basin and mountain.更多还原