Search

Now showing items 1-4 of 4

182W and HSE constraints from 2.7 Ga komatiites on the heterogeneous nature of the Archean mantle

Puchtel, Igor S; Blichert-Toft, Janne; Touboul, Mathieu; Walker, Richard J. (Elsevier - Geochimica et Cosmochimica Acta, 2018)

While the isotopically heterogeneous nature of the terrestrial mantle has long been established, the origin, scale, and longevity of the heterogeneities for different elements and isotopic systems are still debated. Here, ...

Geodynamic implications of ophiolitic chromitites in the La Cabaña ultramafic bodies, Central Chile

González-Jiménez, José María; Barra, Fernando; Walker, Richard J.; Reich, Martin; Gervilla, Fernando (Taylor & Francis Group - International Geology Review, 2014)

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 ...

Meter-Scale Chemical and Isotopic Heterogeneities in the Oceanic Mantle, Leka Ophiolite Complex, Norway

Haller, Mitchell B.; O'Driscoll, Brian; Day, James M.D.; Daley, J. Stephen; Piccoli, Philip M.; Walker, Richard J. (Oxford, 2021-07-13)

Mantle peridotites from three 3 x 3-meter grids sampled at kilometer distances from one another in the ca. 497 Ma Leka Ophiolite Complex (LOC), Norway, are examined to investigate the chemical and isotopic nature of oceanic ...

Estimation of trace element concentrations in the lunar magma ocean using mineral- and metal-silicate melt partition coefficients

Sharp, Miriam; Righter, Kevin; Walker, Richard J. (The Meteoritical Society, 2015)

Abstract–This study uses experimentally determined plagioclase-melt D values to estimate the trace element concentrations of Sr, Hf, Ga, W, Mo, Ru, Pd, Au, Ni, and Co in a crystallizing lunar ...