Geochemistry, geothermometry, and K-Ar dating of episyenitic rocks associated with the Guarda uraniferous granites, Portugal

被引：2

作者：

Bobos, I. ^{[1
]}

Jaques, L. ^{[1
]}

Noronha, F. ^{[1
]}

Clauer, N. ^{[1
]}

Liewig, N. ^{[1
]}

机构：

[1] GIMEF, Ctr Geol, Fac Ciencias, P-4099002 Oporto, Portugal

来源：

Mineral Deposit Research: Meeting the Global Challenge, Vols 1 and 2 | 2005年

关键词：

episyenite; hydrothermal alteration; major; trace and rare earth elements; fluid inclusions; K-Ar ages; Guarda; Portugal;

D O I：

10.1007/3-540-27946-6_58

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The Guarda granite underwent a continuous hydrothermal alteration process from K/Na- to H- and to Ca-metasomatism. No changes of REEs distribution were observed during late-to post-magmatic processes. U remobilization and enrichment occur in the argillic zone. K-Ar ages of episyenitic rocks are around 245 Ma, whereas the argillization zone gives ages around 209 to 225 Ma.

引用

页码：225 / 228

页数：4

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