Ferromanganese crusts and phosphorites from the Rio Grande Rise

• Grant number: 18/05114-8
• Support Opportunities: Scholarships in Brazil - Doctorate
• Effective date (Start): March 01, 2019
• Effective date (End): March 31, 2023
• Field of knowledge: Physical Sciences and Mathematics - Oceanography - Geological Oceanography
• Principal Investigator: Luigi Jovane
• Grantee: Mariana Benites
• Host Institution: Instituto Oceanográfico (IO). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 14/50820-7 - Marine ferromanganese deposits: a major resource of E-tech elements, AP.TEM
• Associated scholarship(s): 20/13258-0 - Geochemistry of ferromanganese crusts from a range of locations and water depths in the Rio Grande Rise, South Atlantic Ocean, BE.EP.DR 19/15587-3 - Formation of ferromanganese crusts and history of phosphatization in the Rio Grande Rise, BE.EP.DR

Abstract

Ferromanganese crusts and phosphorites are commonly found at oceanic rises and are highly enriched in trace and rare earth elements. However, the environmental conditions for one to form are totally different and almost opposite from the other. The aim of this work is to evaluate the formation of both deposits in the Rio Grande Rise, a poorly studied rise in the South Atlantic Ocean near Brazil. In order to do so, a range of analytical techniques will be applied to understand their structure, mineralogy, chemical and isotopic composition and age. The bulk chemistry will be characterized, as well as the individual layers chemistry in order to create an evolutionary model of the geochemical environment of Rio Grande Rise. This work is included in the project FAPESP 14/50820-7, "Marine ferromanganese deposits: a major resource of E-tech elements", and will highly important for the presence of Brazilian works in the RGR. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BENITES, MARIANA; HEIN, JAMES R.; MIZELL, KIRA; BLACKBURN, TERRENCE; JOVANE, LUIGI. Genesis and Evolution of Ferromanganese Crusts from the Summit of Rio Grande Rise, Southwest Atlantic Ocean. MINERALS, v. 10, n. 4, APR 2020. (18/05114-8)

BENITES, MARIANA; HEIN, JAMES R.; MIZELL, KIRA; FARLEY, KENNETH A.; TREFFKORN, JONATHAN; JOVANE, LUIGI. eochemical insights into formation of enigmatic ironstones from Rio Grande rise, South Atlantic Ocea. MARINE GEOLOGY, v. 444, FEB 2022. (19/15587-3, 14/50820-7, 18/17061-6, 18/05114-8)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

BENITES, Mariana. Geochemistry and formation of ferromanganese crusts and associated mineral deposits in the Rio Grande Rise, Southwest Atlantic Ocean. 2023. Doctoral Thesis - Universidade de São Paulo (USP). Instituto Oceanográfico (IO/DIDC) São Paulo.