Category Archives: 2014

2014: Geodynamic implications of ophiolitic chromitites in the La cabaña ultramafic bodies, Central Chile

Geodynamic implications of ophiolitic chromitites in the La cabaña ultramafic bodies, Central Chile Abstract Chromitites (>80% volume chromite) hosted in two ultramafic bodies (Lavanderos and Centinela Bajo) from the Palaeozoic metamorphic basement of the Chilean Coastal Cordillera were studied in terms of their chromite composition, platinum-group element (PGE) abundances, and Re-Os isotopic systematics. Primary chromite…
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2014: Late Jurassic terrane collision in the northwestern margin of Gondwana (Cajamarca complex, eastern flank of the central cordillera, Colombia)

Late Jurassic terrane collision in the northwestern margin of Gondwana (Cajamarca complex, eastern flank of the central cordillera, Colombia) Abstract Medium-grade metabasites and metapelites from the Cajamarca Complex (Central Cordillera of Colombia) are in fault contact with the Jurassic Ibague batholith and show a penetrative foliation, locally mylonitic, suggesting intense dynamic–thermal metamorphism. The amphibolites are…
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2014: Chromitites in ophiolites: How, where, when, why? Part II. The crystallization of chromitites

Chromitites in ophiolites: How, where, when, why? Part II. The crystallization of chromitites Abstract A review of previous work relevant to the formation of concentrations of chromite in peridotites from ophiolitic (s.l.) sequences highlights some of the key problems in understanding the complex processes involved. This review forms the basis for chromitite-genesis models that integrate…
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2014: Did the Turonian–Coniacian plume pulse trigger subduction initiation in the Northern Caribbean? Constraints from 40Ar/39Ar dating of the Moa-Baracoa metamorphic sole (eastern Cuba) of the Moa-Baracoa metamorphic sole (eastern Cuba)

Did the Turonian–Coniacian plume pulse trigger subduction initiation in the Northern Caribbean? Constraints from 40Ar/39Ar dating of the Moa-Baracoa metamorphic sole (eastern Cuba) Abstract The Güira de Jauco metamorphic sole, below the Moa-Baracoa ophiolite (eastern Cuba), contains strongly deformed amphibolites formed at peak metamorphic conditions of 650–660°C, approximately 8.6 kbar (~30 km depth). The geochemistry, based on…
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2014: Garnierites and garnierites: Textures, mineralogy and geochemistry of garnierites in the Falcondo Ni-laterite deposit, Dominican Republic

Garnierites and garnierites: Textures, mineralogy and geochemistry of garnierites in the Falcondo Ni-laterite deposit, Dominican Republic Abstract Garnierites (Ni–Mg-bearing phyllosilicates) are significant ore minerals in Ni-laterites of the hydrous silicate-type. In the Falcondo Ni-laterite deposit (Dominican Republic), garnierites are found within the saprolite horizon mainly as fracture-fillings and thin coatings on joints. Field observations indicate…
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  • 2020: Nanoscale constraints on the in situ transformation of Ru–Os–Ir sulfides to alloys at low temperature

    Nanoscale constraints on the in situ transformation of Ru–Os–Ir sulfides to alloys...
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