Results 61 to 70 of about 3,682 (259)

Chemical Characterization of Chromite from the Crominia and Mairipotaba Massifs, Goiás, Brazil [PDF]

Geologia USP. Série Científica, 2010
Metaultramafi c bodies tectonically emplaced within the metasedimentary sequence of the Araxá Group are associatedwith an ophiolitic melange in southeast Goiás. In the region of Cromínia - Mairipotaba, they occur as lenticular bodiesaligned E-W. Cumulate
Nélson Angeli, Guillermo Rafael Beltran Navarro, Antenor Zanardo, Silvio Roberto Farias Vlach   +3 more
doaj  

Recycling Subducted Organic Carbon as Diamonds: An Example From the New Caledonia Forearc Ophiolite

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract Micro‐diamonds and moissanite (SiC) have been identified in ophiolitic mantle harzburgites and chromitites of the New Caledonian Peridotite Nappe. The pale yellow (100–250 μm) micro‐diamonds and light blue moissanite (mean −26.5‰, range −33.5‰ to −23.8‰ and mean −26.9‰, range −31.8‰ to −25.6‰ respectively) exhibit consistently strong negative ...
Jonathan C. Aitchison, Daniel Patias, Dominique Cluzel, Trevor R. Ireland, Renjie Zhou, Dongyang Lian, Jingsui Yang, Zhen Yan   +7 more
wiley   +1 more source

The Troia–Pedra Branca mafic–ultramafic complex, Borborema Province, Brazil: Records of 2.04 Ga post–collisional Alaskan–type magmatism and PGE mineralization

Journal of the Geological Survey of Brazil, 2021
The Troia–Pedra Branca complex is the most extensive exposure of mafic–ultramafic rocks in the Borborema Province, northeastern Brazil. Chromitite occurrences in this unit are known for a long time, particularly because of its platinum group element (PGE)
Felipe Grandjean da Costa, Wagner da Sila Amaral, Hector Rolando Barrueto, João Luiz Carneiro Naleto, Joseneusa Brilhante Rodrigues, Iaponira Paiva Gomes   +5 more
doaj   +1 more source

Probe and SIMS investigation of clinopyroxene inclusions in chromites from the Troodos chromitites (Cyprus): Implications for dunite–chromitite genesis

Ore Geology Reviews, 2011
Chromite ores formation is still a debated topic and, in this study, detailed analyses of major, minor elements by EMPA and Rare Earth Elements (REE) by SIMS, were performed on silicate inclusions detected in chromite grains of chromitite pods, enveloping dunites and on clinopyroxene of lherzolitic host rock of well known Trodoos chromite ores. Results
Merlini A, Grieco G, Ottolini L, Diella V   +3 more
openaire   +4 more sources

GGR Handbook of Rock and Mineral Analysis Chapter 2 (Part 1) Analysis of Geological Materials – 1: Sample Preparation Methods

Geostandards and Geoanalytical Research, Volume 49, Issue 1, Page 9-50, March 2025.
Key Points Comprehensive review of dissolution‐decomposition methods based on acid attack and molten salt fusion. Dissolution remains the preferred method for many modern instrumental measurement principles e.g., ICP‐MS, ICP‐AES and TIMS. Comprehensive reviews of flux-free fusion for glasses and production of pressed powder pellets for analysis by EPMA,
Philip Robinson
wiley   +1 more source

The genesis and tectonic significance of chromitite-bearing serpentinites in southern NSW [PDF]

, 1998
University of Technology, Sydney. Faculty of Science.The Tumut Serpentinite Province consists of four major serpentinite belts and numerous small serpentinite bodies, that occupy a long narrow tract within the Lachlan Fold Belt of southern NSW.
Graham, IT
core  

The Cogne magnetite deposit (Western Alps, Italy): a Jurassic seafloor ultramafic-hosted hydrothermal system? [PDF]

, 2017
The Cogne magnetite deposit (Western Alps, Italy) is the largest in a series of apatite and sulphide-free magnetite orebodies that are hosted in serpentinites belonging to western Alpine ophiolitic units.
Toffolo, Luca
core   +1 more source

Supplemental Material: FTIR study of H2O in silicate minerals and mineral inclusions in chromite from the peridotite zone of the Stillwater complex (Montana, USA): Evidence for chromitite formation in an H2O-rich environment [PDF]

, 2023
Yang Bai, Ben‐Xun Su, et al.
openalex   +1 more source

Low Temperature Sabatier CO2 Methanation

ChemCatChem, Volume 16, Issue 24, December 20, 2024.
This review exhaustively summarizes the advances made since the beginning of the century in the field of the Sabatier reaction conducted at temperatures less than or equal to 200 °C. Thermal catalysis as well as plasma‐assisted and photo‐assisted catalysis are described there.
Clément Molinet‐Chinaglia, Seema Shafiq, Philippe Serp   +2 more
wiley   +1 more source

PGM in chromitites of Kraka massifs (the Southern Urals): diversity and origin

Georesursy
The paper provides results of study of platinum group minerals (PGMs) from 18 ore occurrences and deposits of the Kraka massifs, most of these located in ultramafic rocks of the upper mantle section (15), and several occurrences in a crust-mantle ...
D. E. Saveliev
doaj   +1 more source