The Vengen Granite, one of early Paleozoic granitic rocks crops out the southern end ridge, Kanino-tsume Peak at Main Shear Zone (MSZ) Sør Rondane Mountains, East Antarctica. This granite is composed medium- to fine-grained mylonitic biotite and cuts MSZ Zone. two-mica dykes locally intrude Granite. have foliations parallel Granite plagioclase, quartz, K-feldspar, biotite, muscovite with trace ...

Abstract Important fault zone processes can be discerned from the characterization of fracture damage and chemical transformations associated with active seismic sources. To characterize 2010 M7.2?El Mayor-Cucapah rupture zone, continuous samples core 23 damaged rock were collected perpendicular to strike Borrego fault. Samples analyzed for clay mineralogy, bulk geochemistry, grain density whic...

The Dora-Maira massif is an archetypal nappe stack of subducted and exhumed upper crust. Slices continental crust experienced metamorphism at blueschist to ultrahigh-pressure (UHP) eclogite-facies conditions. While the timing peak in UHP unit has been extensively studied, little known about other units. In order constrain conditions high-pressure metamorphism, U-Pb-trace element analyses rutile...

Meter- to hectometer-size horizons of carbonate-bearing talcschists are found along or near the contacts between different Liguro-Piemont subduction slices. Through mineral and bulk-rock geochemistry, fluid inclusion analyses, titanite U-Pb geochronology, this study shows that these formed by transformation serpentinites, at conditions close peak burial, due infiltration sourced from surroundin...

, ABSTRACT Metabasaltic rocks in the Klamath Mountains of California with 'komatiitic' major element concentrations were investigated in order to elucidate the origin of the magnesian signature. Trace-element concentrations preserve relict igneous trends and suggest that the rocks are not komatiitic basalts, but im~at~re arc rocks and within-plate alkalic lavas. Correlation of 'excess' MgO with...

Rocks from the Valhalla metamorphic core complex, British Columbia, Canada, have experienced granulite Jades metamorphism at conditions of 820±30°C, 8±1 kbar. Peak metamorphism was accompanied by dehydration melting of muscovite, but not biotite, followed by minor back reaction of garnet + K-feldspar + H20sillimanite + biotite+plagio close.' At conditions very near those of the peak, extensive ...

Abstract The Coles Hill uranium deposit, with an indicated resource of about 130 Mlb U3O8, is the largest unmined deposit in United States. hosted Taconian (approx. 480–450 Ma) Martinsville igneous complex, which consists Ordovician Leatherwood Granite (granodiorite) and Silurian Rich Acres Formation (diorite). host rock was metamorphosed to orthogneiss during Alleghanian orogeny 325–260 Ma), w...

The equations of state different phases in the CaSiO3 system (wollastonite, pseudowollastonite, breyite (walstromite), larnite (Ca2SiO4), titanite-structured CaSi2O5 and CaSiO3-perovskite) are constructed using a thermodynamic model based on Helmholtz free energy. We used known experimental measurements heat capacity, enthalpy, thermal expansion at zero pressure high temperatures, volume pressu...