A pressure solution flow law for the seismogenic zone: Application to Cascadia. [PDF]
Sci AdvFisher DM, Hirth G.
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Petrogenesis and tectonic evolution of tourmaline- bearing leucogranites, Sikait area, Southeastn desert of Egypt utilizing mineralogical and bulk rock analysis. [PDF]
Sci RepSaleh GM +5 more
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A rapid transition from subduction to Barrovian metamorphism: geochronology of mafic-ultramafic relicts of oceanic crust in the Central Alps, Switzerland. [PDF]
Swiss J GeosciLemke K, Rubatto D, Hermann J.
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Amphibolitization of calc-silicate metasedimentary rocks
Contributions to Mineralogy and Petrology, 1971Diopside granofels layers are associated with other metasedimentary rocks and gneisses near McMurdo Sound, Antarctica. Disrupted diopside granofels layers form tectonic inclusions which may have reaction rims of amphibolite. This amphibolite may either be a typical hornblende-plagioclase amphiholite or a hornblende-quartz amphibolite according to the ...
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Geochemistry of Archean metasedimentary rocks from West Greenland
Geochimica et Cosmochimica Acta, 1984Abstract Archean metasedimentary rocks occur as components of the Isua supracrustals, Akilia association and Malene supracrustals of southern West Greenland. Primary structures in these rocks have been destroyed by metamorphism and deformation. Their chemistry and mineralogy is consistent with a sedimentary origin, but other possible parents (e.g ...
Scott M McLennan +2 more
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Whole-Rock Rb-Sr Age of Metasedimentary Rocks Below the Stillwater Complex, Montana
Geological Society of America Bulletin, 1969Eight metasedimentary rocks selected from a suite collected below the Stillwater Complex in the Beartooth Mountains, Montana, yield a whole-rock Rb-Sr age of 2730 ± 150 m.y. (λ = 1.39 × 10 −11 /yr). The samples represent rocks located 0.4 to 6 miles from the lower contact of the Complex, and the nearer samples are definitely within the contact ...
J. L. POWELL +2 more
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Partial melting of common metasedimentary rocks: A mass balance approach
Contributions to Mineralogy and Petrology, 1980Materials balance calculations are presented to document the progressive bulk chemical changes in metagreywacke and metapelite with separation of increments of granite of minimum melt composition. During partial melting, enrichment of Fe relative to Mg in granite and strong absorption of water leave residual rocks with increasing proportions of such Mg-
MacRae, N. D., Nesbitt, H. W.
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Late Precambrian Metasedimentary Rocks of Egan Range, Nevada
AAPG Bulletin, 1963Approximately 8,450 feet of polymetamorphic Late Precambrian strata are exposed at Heusser Mountain in the central northern Egan Range, Nevada. These rocks were regionally metamorphosed to slates, argillites, phyllites, metasiltstones, and quartzites; they were later contact-metamorphosed to grades as high as the biotite-zone by a quartz monzonite ...
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Evidence for biogenic graphite in early Archaean Isua metasedimentary rocks
Nature Geoscience, 2013The Archaean rocks of Isua, West Greenland, contain graphite, but its origins are debated. Geochemical and microscopic analyses suggest that the graphite was formed from biologically formed carbon that was deposited at least 3.7 billion years ago.
Ohtomo, Yoko +4 more
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