Dredgers locations and petrographic carbonate description of oceanic substrate of the Rio Grande Rise, SW Atlantic


Samples of the summit of the Rio Grande Rise (RGR) were dredged by the Brazilian Geological Survey on board of the Marion Dufresne in 2011. This campaign is part of the de Exploration of the Rio Grande Rise Program (PROERG, in poruguese) that aimed to research the Fe-Mn substrate. Hundereds of decimetric and metric samples of Fe-Mn crusts, carbonate rocks and phosphates were collected by dredge in the West-Central portion of the RGR. The carbonate samples were selected and described macroscopically and then 25 thin sections were made. Percentages of components in the microscopic descriptions were determined using visual estimation charts. The carbonate rocks classification were based on microfacies texture.

DOI https://doi.org/10.1594/PANGAEA.964804
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.964804
Creator Silva, Rafael Oliveira; Leite, Mariangela; Rudnitzki, Isaac; Soares, Igor; Lopes, Victor; Souza, Mauro Lisboa; Simoes, Heliasio; Frazão, Eugênio; Rojas, Jonathan; Marinho, Marcelo M ORCID logo
Publisher PANGAEA
Publication Year 2024
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 1225 data points
Discipline Earth System Research
Spatial Coverage (-36.812W, -33.537S, -31.097E, -30.419N)
Temporal Coverage Begin 2011-06-11T00:00:00Z
Temporal Coverage End 2011-07-15T00:00:00Z