We have developed a new quantitative method to estimate paleohorizontal in granitic plutons using the aluminum-in-hornblende (AH) barometer. The method is used to correct previously published paleomagnetic data from the 93–96 Ma Mount Stuart batholith of the Cascades Mountains, Washington State, for the effects of postemplacement tilting. AH barometry was done on 46 samples from the batholith u...

Massive, boudinaged, rose-coloured layers up to one metre in thickness composed of 60–80 vol% spessartine-rich garnet and 15–40 quartz occur high-pressure, garnet-mica schist on Margarita I...

Abstract Petrographic observations combined with mineral compositional analyses constrain the phase relations of prograde metamorphosed serpentinites in Bergell contact aureole (Italy). In a 1500 m profile perpendicular to north-eastern edge intrusion, seven dehydration reactions ran completion. Three previously undocumented have been identified within 70 intrusive contact: olivine + anthophyll...

Talc schist deposits are reported in central Cameroon region, and different alteration zones were determined depending on differences related to the texture color of host rock. For purpose determining mineralogical physicochemical characteristics talc schist, a total 45 samples from sites studied collected analyzed using an array physico-chemical methods. mainly composed variable amount associa...

Accretionary and collisional orogeny are often accompanied by the disturbance of geothermal gradient, leading to high-temperature metamorphism. High-temperature metamorphic rocks significant in their ability help reconstruction thermal histories orogenic belts. The Tianshan Orogenic Belt, at southwest margin Central Asian is a record long-term subduction–collision–post-collision process that ha...

The B and Pb isotope systems are widely applied tracers of recycling processes occurring during subduction. Studies examining these complementary systems as a pair enjoy considerable success, where B primarily records the thermal and fluid evolution of the subducting slab, whereas the tripartite Pb system constrains the source of subducted material returned to volcanic arcs. However, interpreta...