锶同位素方法在地层研究中的某些应用介绍SOME APPLICATIONS OF Sr ISOTOPE METHOD IN STRATUM RESEARCHES
杨杰东
摘要(Abstract)：
本文介绍了Sr同位素方法的原理、实验方法和在地层学研究中的一些应用。Sr同位素方法和其它一些地层学方法,如古地磁方法和稳定同位素方法相比不需要那样高的采样密度,也不受地区、纬度和沉积相等因素的影响,因而应用较为简单。Sr同位素方法可以很好地应用于全球海相沉积地层的对比、海陆相地层的鉴别和地层年龄的估测。特别是近几年来DePaolo和Ingram,Palmer和Elderfield,Kovach利用化石样品精确测定出显生宙海水~(87)Sr/~(86)Sr比值对地质时间的变化曲线,为建立“高分辨Sr同位素地层学”奠定了基础,Sr同位素地层学方法在解决许多地质学、地球化学、古海洋学和全球性事变学等问题中都是十分有益的,其应用将日益广泛。
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作者(Author): 杨杰东
参考文献(References)：
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