Glasses containing various amounts of aluminum and fluorin were crystallized by the heat treatment. Bending strengths of the crystallized glasses were measured, the crystalline phases were identified by X-ray diffraction method, and the microstructures were examined by electrommicroscopy. The relation between the microstructure and the bending strength was studied. The results obtained are summ...

An electron microprobe study has been carried out on platinum-group minerals, accessory phases, and chromite in several chromite deposits of the Alapaevsk ophiolite (Central Urals, Russia) namely the Bakanov Kluch, Kurmanovskoe, Lesnoe, 3-d Podyony Rudnik, Bol’shaya Kruglyshka, and Krest deposits. These deposits occur in partially to totally serpentinized peridotites. The microprobe data shows ...

The Posada Valley amphibolites in the inner zone of Variscan Sardinia are characterized by garnet porphyroblasts containing epidote, titanite, quartz, clinopyroxene, amphibole, and plagioclase concentrated core. matrix is made up amphibole fine-grained clinopyroxene plagioclase. recorded an HP stage, a metamorphic re-equilibration, third stage under greenschist facies. P–T conditions I (530–650...

Processes for formation, cooling, and altering Earth's ocean crust are not yet completely understood due to challenges in access sampling. Here, we use contiguous micro-imaging infrared spectroscopy develop complete-core maps of mineral occurrence investigate spatial patterns the hydrothermal alteration 1.2 km oceanic recovered from Oman Drilling Project Holes GT1A, GT2A, GT3A drilled Samail Op...