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Showing 1 to 20 of 71 for “"sills"”.
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Anorthositic sills of the southern Adirondack Mountains of New York state
… Wells gabbro is distinct from the rest of the sills and is related to the Oregon Dome. Whole rock data show that the gabbroic anorthosite and the rocks of the Thirteenth Lake Dome have a differentiation trend of minor iron enrichment, while the Wells gabbro, Oregon Dome and Snowy Mountain Dome …
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Geochemical, Isotopic, and Mineralogical Characterization of the Frobisher Suite Mafic-Ultramafic Sills, Southern Baffin Island, Nunavut, with Implications for Metallogenic Potential
… magmatic province comprised of mafic-ultramafic sills in southern Baffin Island, Nunavut. The sills are emplaced into the metasedimentary strata of the middle Paleoproterozoic Lake Harbour Group, and vary in thickness from several meters to hundreds of meters. Based on major and trace element …
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The Role of Magmatism in the Catalina Metamorphic Core Complex, Arizona: Insights from Integrated Thermochronology, Gravity and Aeromagnetic Data
… Samples were collected from the Wilderness suite sills, the most voluminous suite. U/Pb data from zircon indicate that the Wilderness suite sills were emplaced during two separate phases of magmatism, the first at ~55 Ma and the second at ~45 Ma with additional evidence of zircon growth at <40 …
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Igneous intrusions and thermal evolution in the Raton Basin, CO-NM: contact metamorphism and coal-bed methane generation
Tertiary mafic dikes and sills intrude coal-bearing formations of the Raton Basin. This study investigates the role of intrusions in generating methane from coal. Coal samples at four different outcrops were analyzed by vitrinite reflectance, carbon isotopes and petrography. Reflectance values at …
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Crustal melting in the Himalayan orogen : field, geochemical and geochronological studies in the Everest region, Nepal
… and 40Ar/39Ar study of leucogranite dikes, sills, and the metamorphic rocks they intrude. Backscattered electron imaging of accessory minerals provided important insights into the petrogenesis of monazite, xenotime and zircon, and guided efforts to isolate accessory phase growth domains. In …
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Order and chaos in the olivine underworld: two mechanisms for the formation of basal olivine layers
… to the result of in-situ differentiation. Two sills with basal olivine layers, the 0601 sill, Victoria Island, NWT, Canada, and the Palisades Sill, Fort Lee, NJ have been examined in detail. First, it can be shown that the 0601 sill could have formed by the emplacement of a single phenocryst …
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The Origins of Four Paterae of Malea Planum, Mars
… the mid- to late-Noachian, likely the result of sills liquefying the volatile-rich crust. Malea and Pityusa Paterae formed during the late Noachian. The Hesperian was marked by the formation of Peneus and Amphitrites and complex valley networks. During the mid-Hesperian, southern Malea Planum may …
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Kinematics and timing of normal faulting in a metamorphic core complex: Grouse Creek Mountains, Utah
… Butte stock and associated leucocratic dikes and sills. The Oligo-Miocene fabric exhibits a foliation parallel to the first, records top-to-the-275 noncoaxial shear, deforms the Red Butte stocks and overprints the Eocene fabric within 50 meters beneath the Middle detachment fault. Improvements are …
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Evolution of an Archean greenstone belt in the Stormy Lake - Kawashegamuk Lake area (stratigraphy, structure and geochemistry) - Western Wabigoon Subprovince, Northwest Ontario /
… of pillowed tholeiitic basalts and gabbro sills characterized by flat REE profiles, is exposed in the south part of the map area and belongs to a 8000 m thick homoclinal assemblage outside the map area. Felsic pyroclastic rocks believed to have been issued from a large central vent …
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The stratigraphy and metamorphism of the Snyder Group, Labrador
… upper quartzite. Porphyritic andesite dikes and sills containing numerous subrounded basement xenoliths were emplaced before deformation and metamorphism. Later sills associated with the Elsonian Nain complex are also present. These intrusive rocks collectively have expanded the section to 355 m. …
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Geometry and construction history of a complex intrusive center in the shallow crust, Mount Pennell, Henry Mountains, Utah
… the early igneous rock and emplaced as shallow sills, or underplated the early laccolith and expanded laterally.
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Modelling Viscous Flow and Elastic Deformation in Fold-Thrust Belts and Magmatic Intrusions
… model of magma propagation to large mafic sills, which are thought to exhibit turbulent flow. Using a hybrid laminar-turbulent flow model I examine the transition to turbulence and show that volume fluxes several orders of magnitude above the average are required to reproduce the aspect …
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Late Pleistocene-Holocene sedimentary processes at the active margin of South-Central Chile : marine and lacustrine sediment records as archives of tectonics and climate variability
… Pacific and were dammed by tectonically uplifted sills at ~8000 yr BP. Analyses of sediment cores from the lakes showed similar successions of marine/brackish deposits at the bottom, covered by lacustrine sediments on top. Dating of the transitions between these different units and the comparison …
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Supervising Gifted People: A Consideration of the Fivefold Gifts in the Effective Supervision of Missionaries
… Seminary, 2017 Supervisor: Dr. M. David Sills God gifted to the church certain people with specific ministry functions in order to develop a complete and healthy church. These gifts are ministry functions that the apostle Paul presented in Ephesians 4:11 and 1 Corinthians 12:28. This …
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Tectonic implications of mantle source changes recorded by Eocene-Oligocene basalts from the Dillon volcanic field southwest Montana (USA)
… alkali compositions. Lavas, especially dikes and sills in the Gravelly Range, often contain small ~1-2 cm-wide crustal xenoliths, such as Eocene Renova formation sediment. Dikes and sills cut Renova strata, and some Dillon lavas overlying Renova sediments. These xenoliths, along with microscopic …
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The geology of the area east of Pofadder with emphasis on shearing associated with the Pofadder lineament, North West Cape
… most likely of Karoo age and occurs as sills and remnant hillocks. Non-diamondiferous kirnberlite pipes occur in the west and their emplacement appears to have been structurally controlled, being situated along the Nouzees shear zone.
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Students with Physical Disabilities in High School Drama Education: Stories of Experience
The dramatic arts have been shown to positively benefit students with disabilities; however, there has been little research examining how students with physical disabilities have experienced drama. Inspired by my own experiences from high school as someone with a physical disability, this narrative …
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An evidence-based policy for the provision of subsidised fertility treatment in California: Integration of array comparative genomic hybridisation with IVF and mandatory single embryo transfer to lower multiple gestation and preterm birth rates
Common to other practice settings, standard in vitro fertilisation (IVF) in California strongly skews the multiple gestation/preterm birth rate upward to approximately 50% of all deliveries, while unassisted conceptions yield this outcome in only 3% of births. Preterm/multiple gestation babies from …
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Emerging genres, dangerous classifications: The kairos of digital composing policy
<p><em>Emerging Genres, Dangerous Classifications: The Kairos of Digital Composing Policy</em> argues that writing policy infrastructure plays a significant (if often invisible) role in affording emerging digital genres in rhetoric and composition. Within the last few decades, the accelerating …
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Sill Overflow Processes in the Philippine Archipelago
… scale processes associated with bathymetric sills in the Philippine Archipelago, with an emphasis on in situ observations made during the 2007-2009 Philippines Straits Dynamics Experiment (PhilEx). Due to their location at the margins of larger basins, the dynamics at these sills set the …
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