Electron microprobe dating of monazite from spinel granulite in the Eastern Ghats Belt, India

被引：0
|
作者：
Rao, AT [1 ]
Fonarev, VI [1 ]
Konilov, AN [1 ]
Romanenko, M [1 ]
机构：
[1] Andhra Univ, Dept Geol, Visakhapatnam 530003, Andhra Pradesh, India
来源：
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA | 1998年 / 52卷 / 03期
关键词：
micro-geochronology; electron microprobe dating; monazite; Eastern Ghats Belt; AP;
D O I：
暂无
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Electron microprobe dating method is same as chemical aging method of TS-Th minerals used in geochronology. The Th-U-Pb concentrations obtained from a single electron probe analysis allow calculation of geologically meaningful age. Based on this method monazite from spinel granulite of Visakhapatnam in the Eastern Ghats Belt (EGB) gave similar to 1,000 Ma, corroborating the late Proterozoic metamorphism and charnockite emplacement, established in parts of the EGB and Antarctica. Microgeochronology of commonly occurring accessory mineral such as monazite in granulite variants is recommended for quick reconnaissance correlation in Gondwanian fragments in East Gondwanaland.
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页码：345 / 350
页数：6
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