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Showing 1 to 20 of 42 for “"metasedimentary rocks"”.

  1. Fluid Budget of Metasedimentary Rocks from a Tertiary Accretionary Prism and Connections to Seismicity, Olympic Peninsula, Northwest Washington State

    Rotman, Holly Makena MacFadden2020

    … a 52.5 km transect on the Olympic Peninsula metasedimentary accretionary prism of the Cascadia subduction zone, and collected approximately 40 representative samples of sandstone and mudrock that were buried to 6–15 km. This depth range intersects the 10–50 km depth range of ETS events. My …

    central-wash Repository record

  2. Structural and metamorphic evolution of the Ormsby Zone and relative timing of gold mineralization: a newly defined Archean orogenic gold prospect hosted on the Discovery Property, Yellowknife greenstone belt, Slave Province, Canada

    Whitty, William H. R.University of British Columbia2007

    … to Archean metabasaltic bodies enclosed in metasedimentary rocks. Some of the metasedimentary rocks are correlated to the Archean Banting Group, based on a U-Pb age of 2.66 Ga on zircon (SHRIMP-RG). The metabasalt is correlated to the Banting Group based on its deposition relationship with …

    ubc Repository record

  3. Mapping, petrological and geochemical explorations of the Massabesic Gneiss Complex in New Hampshire

    Kerwin, Charles M

    … Complex (MGC) is a northeast trending belt of rocks that exposes metasedimentary rocks, migmatites and granites. Early geochronological work indicates that the MGC is Late-Proterozoic, but recent mapping (∼112 mi2, Kerwin, 2000 and ∼130 mil2, this study) of the MGC and surrounding areas …

    unh-thes Repository record

  4. Geologia e tectônica do intervalo Serra do Engenho Novo - Sumaré, no Estado da Guanabara

    Gaglianone, Paulo CésarUniversidade Federal do Rio de Janeiro1971

    … Novo, Sumaré and Borem in Guanabara State. The metasedimentary rocks of the region belonging to the precambrian are widely distributed. They comprise a considerable porttion of the "Fundamental Complex" as gneisses and migmatites and a younger granitic intrusion om the ocidental margin of serra …

    brazil-uerj Repository record

  5. Geochemical investigation of Meso- to Neoarchean (3075–2800 Ma) supracrustal rocks in the Nuuk region, southern west Greenland

    Ordóñez Calderón, Juan CarlosUniversity of Windsor2008

    … data for metamorphosed volcanic and sedimentary rocks in the Ivisaartoq (ca. 3075 Ma), Ujarassuit (ca. 3070 Ma), and Storø (2800-2840 Ma) greenstone belts, Nuuk region, southwestern Greenland. The new data are used to investigate postdepositional alteration, petrogenesis of volcanic rocks, …

    windsor Repository record

  6. Provenance and Tectonic Implications of LA-ICP-MS Zircon Depth-Profiling, Nanaimo Basin, British Columbia, Canada

    Boivin, Marie-PierScience2019

    Detrital zircon studies from sedimentary rocks of the Nanaimo Basin provide an important independent test of the Late Cretaceous paleogeographic position for the basin, and the associated Insular Superterrane, Coast Plutonic Complex (CPC), and North Cascades of the North American Cordillera. …

    calgary Repository record

  7. Sediment incorporation into continental arc systems and paleogeography of the western North American Cordillera: Insights from the North Cascades, Washington

    Sauer, Kirsten B.2017

    … setting where new continental crust is formed. Metasedimentary rocks exposed at the deep crustal levels of exhumed arc systems provide evidence for the vertical and horizontal transfer of upper crustal rocks into arcs within convergent-margin settings. These incorporated sediments are proposed …

    unr Repository record

  8. AN IMBRICATE MID CRUSTAL SUTURE ZONE: THE MOJAVE-YAVAPAI PROVINCE BOUNDARY IN GRAND CANYON, ARIZONA

    Holland, Mark

    … of zircons from both the oldest plutons and metasedimentary rocks in Grand Canyon. My results show that the Vishnu Schist does not support suturing. Paradoxically, plutons east and west of the Crystal shear zone support suturing based on different U-Pb-Hf isotopic characteristics across the …

    unm Repository record

  9. Geology of an Archean Greenstone Belt at Point Lake, Northwest Territories, Canada

    Considine, Patrick Rowan2019

    … sequence" comprised mainly of mafic volcanic and metasedimentary rocks lies over and east of a granitoid gneissic terrane. Field and laboratory studies have helped to clarify the petrography and structural relationships of this fold-and-thrust belt. Traditional models have suggested that …

    odu Repository record

  10. Impact of accessory minerals on the distribution of trace elements in the continental crust: an integrated petrologic and phase equilibria modeling study of migmatites, The

    Matthews, Jessica A.Colorado School of Mines. Arthur Lakes Library2013

    … key accessory minerals during partial melting of metasedimentary rocks, is interpreted to impact the composition of melts generated and extracted from mid-crustal migmatites, and therefore has important implications for our understanding of the process of recycling in the continental crust. Two …

    colo-mines Repository record

  11. Geologic History and the Timing of Mineralization at the Haile Gold Mine

    Mobley, Reid McCall

    … from different rock units (metavolcanic and metasedimentary) in a single drill hole on the Haile property indicate that stratigraphy is out of sequence. U-Pb measurements on zircons collected from the metavolcanic unit yielded an age of 565.2 ± 11.3 Ma that was located at a depth in the …

    south-carolina Repository record

  12. Petrology of the Numabin Bay intrusions, Reindeer Lake, Saskatchewan

    Reinhardt, E. W.University of Saskatchewan1962

    … and lineations in the pluton and surrounding metasedimentary rocks indicates that the pluton was introduced during folding which accompanied regional metamorphism. Magmatic introduction of concordant bodies of diabase followed complete crystallization of the granitic pluton.

    sask Repository record

  13. New structural interpretation, microstructural analyses, and preliminary monazite geochronology of Proterozoic rocks in the central Manzano Mountains, New Mexico

    Rogers, Steve A

    … metarhyolite, amphibolitic metavolcanic rocks, schist, meta-lithic arenite, banded metarhyolite, the White Ridge and related quartzites, and the Blue Springs schist. Plutonic activity included the emplacement of the Monte Largo (1656Ma) and Priest (1427Ma) plutons. Proterozoic …

    unm Repository record

  14. Structure and stratigraphy of the Antelope Mountain Quartzite, Klamath Mountains, Northern California

    Noto, Robert Crispin

    … expressed solely in the pre-extensional metasedimentary rocks, rather than in the syn-extensional igneous rocks themselves. Cretaceous crustal extension, along with Cenozoic erosion appears to be responsible for much of the present-day topography.

    unlv Repository record

  15. Gold-silver mineralization at the London-Virginia Mine, Buckingham County, Virginia

    Mangan, Margaret T.Virginia Polytechnic Institute and State University1983

    … throughout the polydeformed metavolcanic and metasedimentary rocks of the Virginia Piedmont. Production began at the London-Virginia in 1853 and continued intermittantly through 1939. Gold mineralization (averaging 1.2 ppm but with localized concentrations of up to 14.1 ppm) occurs within a …

    vt Repository record

  16. Integrated seismic interpretation of the Larder Lake area, Southern Abitibi greenstone belt, Ontario, Canada

    Mpongo, EltonLaurentian University of Sudbury2020

    … by a series of complex metavolcanic and metasedimentary rocks intruded by granitic plutons and batholiths, which makes the area a hardrock environment. In the Larder Lake area, these stratigraphic units are truncated by two major breaks, the Lincoln Nipissing shear zone (LNSZ) and …

    laurentian Repository record

  17. Petrology and structure of the Glen Quadrangle, southeastern Adirondacks, NY

    Farrar, Stewart Smith

    … is composed of a sequence of Precambrian rocks which were deformed and recrystallized under clinopyroxene-garnet granulite facies conditions during late Precambrian time. Metasedimentary rocks include calcic and dolomitic marble, metapelites, and metaquartzites. Rocks of known igneous …

    binghamton Repository record

  18. CHARACTERIZING THE AURIFEROUS SYSTEM AT PORKY LAKE WITHIN THE PINE LAKE GREENSTONE BELT, NORTHERN SASKATCHEWAN, WITH A FOCUS ON PETROGRAPHY AND MINERAL CHEMISTRY

    Dixon, Dallas RyanUniversity of Saskatchewan2025

    … with a shear zone separating the mafic volcanic rocks (Assemblage A) from the arenaceous metasedimentary rocks (Porky Lake Group) and are hosted in a variety of rock types, for which petrographic and geochemical characterization was previously lacking. The gold mineralization is associated with …

    sask Repository record

  19. Polyphase Deformation, Thrust-Induced Strain and Metamorphism, and Mesozoic Stratigraphy of the Granite Wash Mountains, West-Central Arizona (Tectonics, Mylonite, Geophysics, Mineralization, Terranes)

    Laubach, Stephen ErnestUniversity of Illinois at Urbana-Champaign2014

    … and deformed sedimentary and volcanic rocks, here called the 'Granite Wash' (GW) and 'Salome Peak' (SP) sequences. The GW sequence is at least 1500 meters thick, and can be divided into seven map units, the lowest of which is depositional on 'cratonic' Paleozoic rocks. The sequence is …

    uiuc Repository record

  20. Structural Controls of the San Emidio Geothermal System, Northwestern Nevada

    Rhodes, Greg2011

    … middle to late Miocene Pyramid sequence volcanic rocks and late Miocene to recent sedimentary rocks, all overlying Mesozoic metasedimentary rocks. Currently, a small geothermal power plant produces 3.6 MWe from a 152°C reservoir at 520 m depth at the south end of the active San Emidio fault …

    unr Repository record

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