Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4724165 | Precambrian Research | 2008 | 22 Pages |
Abstract
The Negra Velha Granite is a distinct unit that forms a few stocks that intruded the granitoids of the Tromaà Suite between 2076 and 2056 Ma ago. Negra Velha is an association of monzogranite and subordinate quartz-monzonite and syenogranite with an alkaline signature that shows high Rb-Sr-Ba enrichments, resembling shoshonitic associations. This granite represents the post-orogenic phase of the Rhyacian orogenesis.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Evandro L. Klein, Renê Luzardo, Candido A.V. Moura, Richard Armstrong,