18 research outputs found
Philippine Sea Plate inception, evolution, and consumption with special emphasis on the early stages of Izu-Bonin-Mariana subduction
Stacking fault-enhanced argon diffusion in naturally deformed muscovite
Recent advances in microscale (40)Ar/(39)Ar geochronology have revealed argon concentration gradients in naturally deformed muscovite that are incompatible with volume diffusion uniquely, and have been interpreted to result from intragranular defect-enha
Pyrometamorphism and partial melting of shales during combustion metamorphism: mineralogical, textural, and chemical effects
Numerical simulation of an oil–gas fire: A case study of a technological accident at Tengiz oilfield, Kazakhstan (June 1985–July 1986)
Structural elucidation of triclinic and monoclinic SFCA-III – killing two birds with one stone
Stoichiometry-based estimates of ferric iron in calcic, sodic-calcic and sodic amphiboles: a comparison of various methods
Simultaneous boninitic and arc-tholeiitic volcanisms in the Izu forearc region during early arc volcanism, based on ODP Leg 125 Site 786
U-Pb geochronology of the Grenville Orogen of Ontario and New York: constraints on ancient crustal tectonics
Based on lithological, structural and geophysical characteristics, the Proterozoic Grenville Orogen of southern Ontario and New York has been divided into domains that are separated from each other by ductile shear zones. In order to constrain the timing of metamorphism, U-Pb ages were determined on metamorphic and igneous sphenes from marbles, calc-silicate gneisses, amphibolites, granitoids, skarns and pegmatites. In addition, U-Pb ages were obtained for monazites from metapelites and for a rutile from an amphibolite. These mineral ages constrain the timing of mineral growth, the duration of metamorphism and the cooling history of the different domains that make up the southern part of the exposed Grenville Orogen. Based on the ages from metamorphic minerals, regional and contact metamorphism occurred in the following intervals:Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47306/1/410_2004_Article_BF00307862.pd