摘要
在作者的研究成果基础上,结合近年来文献报道的资料,对U-Pb同位素定年技术的原理、测年矿物、几种测定方法的优点和局限性、针对具体样品选择测年矿物和定年方法的基本原则等问题进行讨论,并对U-Pb同位素定年技术的地质应用潜力进行探讨。结果表明,用于U-Pb同位素年龄测定的不同矿物和不同方法各有不同的特点及局限性。在实际工作中,根据从具体样品中分选得到的U-Pb同位素定年矿物及其数量多少、粒度大小、年龄范围、U-Pb含量、测年精度要求等因素,灵活地选择测年矿物及测年方法,对于获得比较理想的结果是非常重要的。
The principles of U-Pb isotope dating,the advantages and limitations of minerals for dating,several dating methods and the basic principles of selection for minerals and methods of U-Pb dating are discussed based maily on our studies,combined with references recently reported.The potential prospects are discussed for applying in geology.The studies show that the different minerals for dating and different methods of U-Pb dating have different characteristics and limitations.It is very important to select minerals for dating and methods of U-Pb dating according to the mineral content,grain size,age range,U-Pb content and dating precision requirement of the samples to get relatively ideal results.
出处
《地质调查与研究》
2011年第1期63-70,共8页
Geological Survey and Research
基金
国家自然科学基金:华南锡多金属矿床中的锡石U-Pb同位素地质年代学研究(40873041)
国土资源部公益性行业科研专项:非锆石类富铀矿物U-Pb同位素定年方法研究(200911043-15)
