Hypersthene-ilmenite(/magnetite) symplectites in coronitic olivine-gabbronorites

A Study of the Registration of Arsenic and Iodine Ions in Olivine and Hypersthene Crystals

The registration of the trajectories of arsenic and iodine ions in olivine and hypersthene crystals, considered as "track chambers", is reported; these trajectories are revealed by chemical etching and observed as tracks in an optical microscope. A brief discussion concerning the different criteria which have been proposed to explain the registration of heavy ion trajectories in solids is given...

FIRST Ti-XANES ANALYSES OF OLIVINE IN AMOEBOID OLIVINE AGGREGATES

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,...

Metamorphism of basement rocks in the Central Zone of the North China Craton: implications for Paleoproterozoic tectonic evolution

Lithological, structural, metamorphic and geochronological data for the North China Craton enable its division into the Western and Eastern Blocks of Archean to Paleoproterozoic age separated by a north–south trending Paleoproterozoic orogenic belt: the Central Zone. The Central Zone is divisible into a series of lowto medium-grade granite–greenstone belts and high-grade metamorphic terrains co...

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%...