磷灰石裂变径迹(AFT)研究进展
The Study Progress in Apatite Fission Track (AFT)
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摘要: 磷灰石裂变径迹是一种揭示岩石低温热年代学的有力工具。通过对国内外相关文献的广泛阅读,综述了磷灰石裂变径迹分析方法的原理、研究进展和地质意义及其在相关地质领域的应用。总结了影响磷灰石裂变径迹退火行为的主要影响因素,包括:①磷灰石的主要元素及238U的富集。②α衰变亏损。③压力及应力,以及实验观察时需要注意的问题。简要介绍了关于磷灰石裂变径迹退火过程的多元退火模型的建立及控制因素。对于目前的退火模型应用情况,结合前人研究总结了目前该方法的独特性及现行退火模型的不足之处。并对磷灰石裂变径迹在关于盆地热演化史、断层研究和造山带隆升分析 (主要针对青藏高原隆升分析)中的应用做了简单、概要的剖析。Abstract: Apatite Fission Track (AFT) is a useful tool to rebuild the low temperature thermochronological evolution of rocks. Recent research progress on application and methodlogy of AFT is reviewed in this contribution. We summarized the main factors related to AFT annealing behavior, including: ① enrichment of certain main elements and 238U in apatites. ② alphadecay loss.③ pressure and stress,several problems during experimental observation and the multiple annealing model.Review the previous studies,summarize pros and cons of the current annealing model and its application in analysis of the basin thermal-tectonic evolution history,and orogenic belt uplift (i.e.Tibet Plateau uplift).
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