CAJ | 학술논문

锆石作为自然界中一种常见的副矿物，有着稳定的地球化学性质，锆石成因类型的准确判断是正确理解锆石 U-Pb 年龄意义的关键。本文从湖南省花岗岩锆石新元古代、加里东期、印支期和燕山期等不同成因类型的锆石特征与岩体时代的关系展开探讨，分析发现各期花岗岩中锆石的颜色差异明显，一般呈随着岩体时代从老到新由深变浅的趋势，并针对锆石的晶形与区域地质条件及岩性的关系，归纳了不同环境锆石的晶形及晶面的发育特征。由此认为锆石物理性质的鉴定分析是初步分离不同成因的锆石的基础，锆石物理形态学的研究是高精度同位素定年的技术保障。
고석작위자연계중일충상견적부광물，유착은정적지구화학성질，고석성인류형적준학판단시정학리해고석 U-Pb 년령의의적관건。본문종호남성화강암고석신원고대、가리동기、인지기화연산기등불동성인류형적고석특정여암체시대적관계전개탐토，분석발현각기화강암중고석적안색차이명현，일반정수착암체시대종로도신유심변천적추세，병침대고석적정형여구역지질조건급암성적관계，귀납료불동배경고석적정형급정면적발육특정。유차인위고석물이성질적감정분석시초보분리불동성인적고석적기출，고석물리형태학적연구시고정도동위소정년적기술보장。
As a common accessory mineral in nature,zircon has stable geochemical characteristics.The accu-rate judgement of genesis type of zircon is the key to the understanding of the significance of zircon U-Pb age.This paper discussed the relationship between the characteristics of zircon of different genesis types and age of rock mass based on the zircon from granite in Hunan during different periods such as Neoproterozoic, Caledonian,Indosinian and Yanshanian.The analysis results indicated that zircon from granite of different a-ges is obviously different in color and has a trend of change from dark to light as the age of rock mass change from old to new.In light of the relation of crystalline form of zircon with regional geological conditions and lithology,the author summarized the development characteristics of crystalline form and crystal face of zir-con in different environment.At last,the author concluded that the identification and analysis of physical properties of zircon laid the groundwork for the initial separation of zircon of different genesis,and the study of physical morphology of zircon provided the technical guarantee for high-precision isotopic dating.