Enrichment of incompatible elements at grain-boundaries of olivine in an olivine-nephelinite.

FIRST Ti-XANES ANALYSES OF OLIVINE IN AMOEBOID OLIVINE AGGREGATES

Fast grain growth of olivine in liquid Fe–S and the formation of pallasites with rounded olivine grains

Despite their relatively simple mineralogical composition (olivine + Fe–Ni metal + FeS ± pyroxene), the origin of pallasite meteorites remains debated. It has been suggested that catastrophic mixing of olivine fragments with Fe–(Ni)–S followed by various degrees of annealing could explain pallasites bearing solely or prevalently fragmented or rounded olivines. In order to verify this hypothesis...

On the Grain Size Sensitivity of Olivine Rheology

Using the Markov chain Monte Carlo (MCMC) inversion technique of Mullet et al. (2015), we reassess the validity of the conventionally accepted values of the grain size exponent of diffusion creep in olivine aggregates. A systematic and comprehensive analysis of individual experimental runs taken from three widely cited studies reveals that these data do not tightly constrain the grain size expo...

Sintering Behaviour of Waste Olivine and Olivine/Alumina Blends

The sintering behaviour of several green compacts made with olivine or olivine/alumina powder blends has been examined. To this goal, powders were attrition milled, uniaxially pressed into specimens and air sintered at temperatures ranging from 1100 to 1300 °C. The resulting samples were characterized by water absorption, shrinkage, phase composition and density. Compositions containing 5%, 10%...

Olivine in kimberlites

What olivine, the neglected mineral, tells us about kimberlite petrogenesis N. T. Arndt, A. M. Boullier, J. P. Clement, M. Dubois, and D. Schissel OSUG, Univ. de Grenoble, BP 53, Grenoble cedex 38401, France U.F.R. des Sciences de la Terre, UMR 8110 Processus et Bilans des Domaines Sédimentaires, 59655 Villneuve d’Ascq, France BHP Billiton World Exploration, Inc., 1400-1111 West Georgia Street,...