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Showing 1 to 20 of 155 for “"orogeny"”.

  1. Plate tectonics and the Himalayan orogeny : a modelling study based on gravity data

    Warsi, WarisMassachusetts Institute of Technology1976

    Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.

    mit Repository record

  2. The role of the Picuris orogeny in the tectonic evolution of Proterozoic North America

    Aronoff, Ruth Frances

    … and the newly recognized ∼1.40 Ga Picuris orogeny. We address this question at local, regional, and continental scales using a variety of methods, including geochronology, structural analysis, and metamorphic petrology.</p> <p>Here we show that portions of New Mexico did not undergo high …

    purdue-thes Repository record

  3. A PETROLEUM SYSTEM STUDY OF THE CRATONIC WILLISTON BASIN IN NORTH DAKOTA, U.S.A.: THE ROLE OF THE LARAMIDE OROGENY

    Herrera, Henry 1985-University of Houston2013

    The Williston Basin is a Phanerozoic intracratonic basin located in the northern USA (North Dakota, South Dakota and Montana) and southern Canada (Manitoba and Saskatchewan). The basin is known as a major hydrocarbon-producing basin in North America, with a petroleum system characterized by …

    houston Repository record

  4. Structural development of a volcanic sequence of the Lahn area during the Variscan orogeny in the Rhenohercynian Belt (Germany)

    Moe, AungUniversität Heidelberg

    … to low-grade metamorphism during the Variscan orogeny. The field structural data analysis: Bedding and s1-cleavage relationships show a clear NW vergence, in which s1-cleavage is steeper. s2-cleavage (s1-cleavage folding) occurs as kinking and buckling. Intersection lineations are dispersed in …

    heid-diss Repository record

  5. Sedimentation during the Taconic orogeny: a study of late Ordovician and early Silurian rocks of the Siegas area, New Brunswick.

    Hamilton-Smith, TerenceMassachusetts Institute of Technology1969

    Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1969.

    mit Repository record

  6. To and fro in the archipelago: Repeated inter-island dispersal, eustasy and New Guinea’s orogeny affect diversification of Delias, the world’s largest butterfly genus

    Liang, Weijun2028

    … of sea level during the past 3 Myr and the orogeny of the New Guinea central highlands about 5 Mya. I therefore reconstructed the evolutionary history of 212 <em>Delias</em> species and inferred the timing of their divergence to examine whether eustasy (sea level fluctuations), and/or New …

    cuny Repository record

  7. STRUCTURAL AND KINEMATIC INVESTIGATION OF THE DADEVILLE COMPLEX-BREVARD ZONE CONTACT (SOUTHERN APPALACHIANS): POLYPHASE EMPLACEMENT OF AN ALLOCHTHONOUS TERRANE ON THE LAURENTIAN MARGIN

    Williams, Andrew2023

    … as a volcanic island arc during the Taconic orogeny (Ordovician Period) and was accreted onto Laurentia during the Acadian orogeny (Devonian-Mississippian Periods); however, the mechanism and role of accretion during the Acadian orogeny is not well constrained. Three proposed emplacement …

    usm Repository record

  8. Eo-Variscan Orogenesis in the Guilleries Massif, Catalan Coastal Ranges, Northeastern Spain Recorded by U-Th-Pb ages of Monazite Inclusions in Metamorphic Garnet

    Wise, Julia L.University of Cincinnati2012

    <p>A chronicle of the Variscan Orogeny is recorded in high grade pelitic schists of the Guilleries Massif of the Catalan Coastal Ranges of northeastern Spain which preserve multiple rounds of deformation and metamorphism. The massif records a classic Variscan low-pressure and high-temperature …

    ohiolink Repository record

  9. Across- and along-strike structural and geochronological variations of the Nashoba-Putnam and Avalon terranes, eastern Massachusetts, Connecticut, and Rhode Island, southeastern New England Appalachians

    Severson, Allison R.Colorado School of Mines. Arthur Lakes Library2020

    … These orogenies are the mid-Paleozoic Acadian orogeny and the late Paleozoic Alleghanian orogeny. The northeast-trending Nashoba-Putnam terrane, located in eastern Massachusetts and Connecticut is part of the Gondwanan-derived microcontinent Ganderia. It is in fault contact with greenschist …

    colo-mines Repository record

  10. A coming together: The juxtaposition of the Rae and Hearne cratons along the Virgin River shear zone (Snowbird tectonic zone), Saskatchewan, Canada, and the implications for proto-Laurentia

    Card, Colin DaleFaculty of Graduate Studies and Research, University of Regina2016

    … Rae. The metamorphic culmination of the Taltson orogeny developed at 1.94-1.93 Ga, independently of the Thelon orogeny, which culminated some 10-20 million years earlier. The footwall of the Virgin River shear zone comprises rocks of the southern Hearne Province, which is dominated by a felsic …

    regina Repository record

  11. Architecture of the Silurian sedimentary cover sequence in the Cadia porphyry Au-Cu district, NSW, Australia : implications for post-mineral deformation

    Washburn, MalissaUniversity of British Columbia2008

    … Arc magmatism at the end of the Benambran Orogeny. N-striking faults, including the curviplanar, northerly striking, moderately west-dipping basement thrust faults of the Cadiangullong system, developed early in the district history. NE-striking faults formed during rifting in the late …

    ubc Repository record

  12. Geochemistry of Variscan lamprophyre magmatism in the Saxo-Thuringian Zone

    Abdelfadil, Khaled MohamedUniversität Potsdam

    … to track the variable effects of the Variscan orogeny on local mantle evolution. This work presents and evaluates the mineralogical, geochemical, and Sr-Nd-Pb isotopic data of late-Variscan calc-alkaline lamprophyres, post-Variscan ultramafic lamprophyres, of alkaline basalt from Lusatia, and, …

    potsdam-diss Repository record

  13. EMPLACEMENT OF THE DADEVILLE COMPLEX OF THE SOUTHERNMOST INNER PIEDMONT WITHIN THE 7.5 MIN. CUSSETA QUADRANGLE, CHAMBERS COUNTY, ALABAMA: CHANNEL FLOW, KLIPPE KINEMATICS, OR OROGEN PARALLEL TRANSLATION

    Black, Timothy2022

    … arc-back arc fringing system during the Taconic orogeny and emplaced and recorded peak metamorphism during the Acadian orogeny.</p> <p>The Dadeville Complex is an allochthonous arc terrain built on extended Laurentian crust. The mode of transportation and accretion after formation is not well …

    usm Repository record

  14. History and timing of polyphase Proterozoic deformation in the Manzano thrust belt, central New Mexico

    Luther, Amy

    … Laurentia, particular the 1.65-1.60 Ga Mazatzal orogeny and the later 1.4 Ga thermo-tectonic event. This study focuses on the Los Pinos Mountains, near the southern end of the Manzano thrust belt, an area that has been only weakly overprinted by a later phase of Mesoproterozoic tectonism and is …

    unm Repository record

  15. Mesoproterozoic Basement From The Central And Southern Appalachians Reveal High-temperature Magmatic Conditions And Non-laurentian Origin Of Earth’s Most Zircon Fertile Magmas

    Makovsky, Kyle

    <p>The Mesoproterozoic (1.4-0.9 Ga) Grenville Orogeny led to the formation of the supercontinent Rodinia. One unique characteristic of the Grenville Orogeny is that it produced a volumetrically significant amount of zirconium- (Zr) enriched granitoids, evidently more than any period both prior to …

    syracuse-diss Repository record

  16. Mesoproterozoic Basement From the Central and Southern Appalachians Reveal High-temperature Magmatic Conditions and Non-laurentian origin of Earth's Most Zircon Fertile Magmas

    Makovsky, Kyle

    <p>The Mesoproterozoic (1.4-0.9 Ga) Grenville Orogeny led to the formation of the supercontinent Rodinia. One unique characteristic of the Grenville Orogeny is that it produced a volumetrically significant amount of zirconium- (Zr) enriched granitoids, evidently more than any period both prior to …

    syracuse-diss Repository record

  17. Tectono-metamorphic history of the re-worked, high-grade Maud Belt at central-Eastern H.U. Sverdrupfjella, Antarctica

    Byrnes, GregoryDepartment of Geological Sciences2015

    … was formed by a granulite facies Grenvillian orogeny and was variably overprinted by high-grade metamorphism (eclogite to amphibolite facies) during the PanAfrican orogeny. The degree of reworking during the Pan-African has been a contentious issue for some time, with early workers assigning …

    cape-town Repository record

  18. Investigating the metamorphic evolution of reworked terrains.

    Cutts, Kathryn2011

    … by the Ordovician to Silurian Caledonian orogeny such that all the preserved structures and in many cases the metamorphic mineral assemblages are Caledonian in age. Fortunately, large garnet porphyroblasts have preserved the older events and in situ geochronology allows us to target …

    adelaide Repository record

  19. The oxygen isotope composition of the country rock of the Koegel Fontein igneous complex

    Whitehead, BenjaminDepartment of Geological Sciences2018

    … in the BFSZ coincides with the Pan-African Orogeny and a 549-545 Ma global glaciation, and it is reasonable to assume that ambient meteoric water had a very low δ18O value, perhaps as low as -30 ‰. Assuming a possible Δrock-water range from 0.5 to 2.8, a δ18O value of 8‰ for the rock before …

    cape-town Repository record

  20. High pressure acadian metamorphism of the Straits Schist, Western Connecticut

    Miller, Stephen JohnVirginia Tech1990

    … was undertaken to provide data on the Acadian Orogeny in the northern half of the western highlands of Connecticut. The Straits Schist, contained within the Connecticut Valley synclinorium, is structurally involved in portions of both the Hartland and Gneiss Dome belts, outlining isoclinally …

    vt Repository record

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