摘要
金伯利岩是化学成分、矿物组成和结构多变的混杂岩,极易发生蚀变。因此,采用单一的年龄测定方法很难确定金伯利岩的侵位年龄,数据结果差别很大。该文以山东蒙阴地区金伯利岩应用的测年方法为例,对比分析了K-Ar法、Ar-Ar法、Rb-Sr法、Sm-Nd法、U-Pb法的年龄数据,探讨了不同测年方法及其选取的岩石、矿物样品的适用性。认为在符合地层对金伯利岩侵位时间约束的前提下,采用多种同位素测年方法相互印证,深入研究矿物、岩石及岩浆成因是必不可少的。
Kimberlite is complex rock with changelul chemical composition,mineral composition and structures.Alteration also easily happened.Therelore,the age ol kimberlite is difficult to be determined by using a single agedetermination method,and the results are very dillerent.In this paper,setting the age determination methods olkimberlite applied in Mengyin area ol Shandong province as an example,through comparison and analysis ol the K-Ar method,Ar-Ar method,Rb-Sr method,Sm-Nd method,U-Pb method,dillerent age determinationmethod and applicability ol rock and mineral samples have been studied.It is regarded that in line with the lormationol kimberlite emplacement under the premise ol time constraints,it is very essential to conlirm with each other,to sutdy minerals,rocks and magmatic in deep part by using a variety ol dating methods.
作者
吕青
葛跃进
LV Qing;GE Yuejin(No.7 Exploration Institute ol Geology and Mineral Resources, Shandong Linyi 276006, China)
出处
《山东国土资源》
2016年第10期12-15,20,共5页
Shandong Land and Resources
基金
2013年度山东省地矿局地质科技攻关项目:山东省蒙阴地区金刚石原生矿成矿规律及深部找矿方法技术(KY201306)
