Douradinho 8 kimberlite, Douradinho River valley, Coromandel, Coromandel mining district, Minas Gerais, Brazili

Regional Level Types
Douradinho 8 kimberlite	- not defined -
Douradinho River valley	Valley
Coromandel	Municipality
Coromandel mining district	Mining District
Minas Gerais	State
Brazil	Country

The Grota do Cedro (“Cedar Grove”) kimberlite is exposed along the Córrego Cedro (Cedar Creek) that feeds into the Douradinho River about 4 km away. The kimberlite is of Late Cretaceous age, and intruded schist of the Neoproterozoic Araxá Group. In part, the kimberlite was studied to see if it contains diamonds, and if the mineralogic characters are consistent with diamond-producing kimberlites elsewhere in the world and in the Alto Paranaíba Igneous Province, specifically. No diamonds were found in the kimberlite at Grota do Cedro, however, and analysis of calcium and chromium content in pyrope garnets collected from it show them to be typical of those having poor or no content of diamonds (Andrade and Chaves, 2009). In contrast, however, after considerable study the Vargem I kimberlite exposed along the Santo Inácio River did yield a number of small (less than one carat) diamonds, along with favorable calcium and chromium content of pyrope garnets for diamond (Chaves, 2012).

NK, rev. May 2018

Other Regions, Features and Areas containing this locality

References