AGES OF GRANULITIC METAMORPHISM IN THE SAO-FRANCISCO CRATON (BRAZIL) - IMPLICATIONS FOR THE TYPE OF THE TRANSAMAZONIAN OROGENY

被引：0

作者：

LEDRU, P

COCHERIE, A

BARBOSA, J

JOHAN, V

ONSTOTT, T

机构：

[1] UFBA, BR-40210 SALVADOR, BA, BRAZIL

[2] PRINCETON UNIV, PRINCETON, NJ 08544 USA

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II | 1994年 / 318卷 / 02期

关键词：

GEOCHRONOLOGY; PB-EVAPORATION; ZIRCON; GRANULITE; JEQUIE COMPLEX; BRAZIL;

D O I：

暂无

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

An Early Proterozoic phase of granulite metamorphism in the Sao Francisco craton (Brazil) has been dated at 2,080 Ma by the single-zircon dating method using step-wise evaporation. This event is superposed on an earlier Archaean phase of granulite facies metamorphism at 2,645 +/- 10 Ma whose age is preserved from the isotopic rehomogenization related to the Transamazonian orogen.

引用

页码：251 / 257

页数：7

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