The Chenaillet ophiolite, South of Montgenèvre (France), represents a preserved portion the alpine ocean. gabbros form lenticular bodies 50 to 200 m thick and few hundreds meters wide. They are intrusive in serpentinites often overlain by pillow-lavas. Plagiogranite/albitite veins rare volumetrically negligible. petrology gabbro s.s. show great details progressive cooling massif, clinopyroxene ...

some small gabbro patches emplaced along the thrust fault with w-e trend in the vicinity of maien bolagh village at the ht/mp metapelites, a part of the central iran zone (near to sanandaj-sirjan zone). the coarse-grained dark gabbro samples consist of amphibole, clinopyroxene, plagioclase, minor quartz, titanite, and biotite. gabbros have high potassic calc-alkaline to shoshonitic affinity. th...

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...

Analytical procedures for U-Pb isotope dilution analyses at the Pará-Iso isotope geology laboratory of the Federal University of Pará (UFPA) are described in detail. The procedures are applied to zircon, titanite, rutile, apatite, columbite-tantalite and whole rock. Reagent preparation and chemical processing are done in clean-room conditions. Samples are dissolved using Teflon microcapsules in...

Single-crystal diffuse scattering data have been collected at room temperature on synthetic titanite using both neutrons and high-energy x-rays. A simple ball-and-springs model reproduces the observed diffuse scattering well, confirming its origin to be primarily due to thermal motion of the atoms. Ab initio phonons are calculated using density-functional perturbation theory and are shown to re...

In this study the formation of polygenetic High Tatra granitoid magma is discussed. Felsic and mafic mixing mingling processes occurred in all batches composing pluton are documented by typical textural assemblages, which include: microgranular enclaves (MME), clots, felsic quartz-plagioclase-titanite ocelli, biotite-quartz poikilitic plagioclase crystals, chemically zoned K-feldspar phenocryst...

U–Pb monazite and zircon ages reveal that the high pressure granulites from eastern Tanzania were metamorphosed during a Pan-African tectonothermal episode. These mineral ages range from 610 to 655 Ma and indicate that peak metamorphic conditions were diachronous in the different granulite domains. U–Pb titanite and rutile ages define integrated cooling rates of 2–5°C/Ma for all investigated gr...