Early Proterozoic Evolution of the Alto Jauru Greenstone Belt, Southern Amazonian Craton, Brazil
- 1 March 1997
- journal article
- research article
- Published by Taylor & Francis in International Geology Review
- Vol. 39 (3) , 220-229
- https://doi.org/10.1080/00206819709465268
Abstract
The Alto Jauru Greenstone Belt in west-central Brazil comprises three belts of Early Proterozoic volcano-sedimentary sucessions that were invaded by Early to Middle Proterozoic intrusions, including tonalites, gabbros, and granites. Volcanic rocks represent a bimodal suite with ultrabasic-basic rocks of komatiitic-tholeiitic affinities at the base and intermediate-felsic calc-alkaline lavas and pyroclastic units on the top. Chemical differences exist between basic volcanic rocks from the Jauru Belt and those from the Cabacal Belt, but the volcanic rocks and the Cabacal Tonalite appear to be related to an island-arc environment and possibly were generated from the same mantle source. The volcanic-volcanoclastic sequence in the Jauru Belt hosts important deformed, gold-rich volcanogenic massive sulfide deposits.Keywords
This publication has 14 references indexed in Scilit:
- The geochemical fingerprints of different tectonomagmatic environments using hygromagmatophile element abundances of tholeiitic basalts and basaltic andesitesPublished by Elsevier ,2003
- Chemical characteristics of island-arc basalts: Implications for mantle sourcesPublished by Elsevier ,2003
- Petrochemistry and tectonic significance of Cretaceous island-arc rocks, Cordillera Oriental, Dominican RepublicTectonophysics, 1994
- Geochemistry of mineralized and barren, late proterozoic felsic volcanic rocks in southeastern Cape Breton Island, Nova Scotia (Canada)Precambrian Research, 1992
- Early Geochemical Evolution of an Oceanic Island Arc and Backarc: Fiji and the South Fiji BasinThe Journal of Geology, 1987
- Trace Element Discrimination Diagrams for the Tectonic Interpretation of Granitic RocksJournal of Petrology, 1984
- An early Proterozoic volcanic arc succession in southeastern WyomingCanadian Journal of Earth Sciences, 1984
- The origin of reversed geochemical zoning in the northern New Hebrides volcanic arcContributions to Mineralogy and Petrology, 1982
- Geochemistry of the Dubois greenstone succession: An early proterozoic bimodal volcanic association in west-central ColoradoPrecambrian Research, 1981
- Tectonic setting of basic volcanic rocks determined using trace element analysesEarth and Planetary Science Letters, 1973