CAJ | 학술논문

主要对电子探针化学测年技术的基本原理及其相关技术作一介绍。并以其在地学中的具体应用，如对独居石、锆石的化学测年，证明它是一种分析快速、测试容易的技术，与传统的同位素法测得的年龄具可比性。此项技术对矿石的来源、不同矿物的不同环带、不同世代的成分演化乃至时间演化均可进行分析，并可使年龄数据点与成分数据严格对应，而且测试所需的样品量少，可进行单颗粒的测定。因此，当某些岩体的被测矿物有捕虏体成因、岩浆成因、地幔成因等各种来源时，可分别求出某单一事件的年龄。另外，利用碎屑独居石的w(PbO)/w(ThO*2)比值来确定碎屑岩的源岩是一种新的方法，并指出了其局限性。
주요대전자탐침화학측년기술적기본원리급기상관기술작일개소。병이기재지학중적구체응용，여대독거석、고석적화학측년，증명타시일충분석쾌속、측시용역적기술，여전통적동위소법측득적년령구가비성。차항기술대광석적래원、불동광물적불동배대、불동세대적성분연화내지시간연화균가진행분석，병가사년령수거점여성분수거엄격대응，이차측시소수적양품량소，가진행단과립적측정。인차，당모사암체적피측광물유포로체성인、암장성인、지만성인등각충래원시，가분별구출모단일사건적년령。령외，이용쇄설독거석적w(PbO)/w(ThO*2)비치래학정쇄설암적원암시일충신적방법，병지출료기국한성。
This paper mainly introduces the basic theory, age calculationand application of chemical dating technique using Electron-Probe Micro-Analyses (EPMA) and so on. Many concrete examples of its application to earth science, for instance, the chemical dating of monazite and zircon analysis on EPMA have proved it's a kind of fast, easy-analyzing technique. The age data can be comparable with those of the isotope dating technique. However, it can respectively analyze the source of minerals, the different zones of various minerals, the component and time evolving of their different secula. And the age data strictly correspond with the points of the component. It needs a small amount of sample and can analyze the single grain. Hence, for the minerals to be analyzed in some rocks, when there are all sorts of genesis with xenolith, magma, mantle and so on in them,the age of a certain single event can be respectively got.The ratio of w(PbO)/w(ThO*2) of detrital monazite is a new measure for the provenance analysis of clastic rocks. All these above suggest it's a kind of age dating technique with many developing prospects. At the same time, the authors also point out its limitation.