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Showing 1 to 10 of 10 for “"Mafic Intrusions"”.
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Geodynamic evolution and petrogenesis of the neoarchaean Francistown granite-greenstone complex in NE Botswana, SW margin of the Zimbabwe craton
… geochemically diverse Neoarchaean granitoids and mafic dominated-supracrustal assemblages. All the supracrustal rocks and mafic intrusions have undergone greenschist to lower amphibolite facies metamorphism, but most mafic intrusions have preserved original igneous textures. The Francistown …
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Seismic investigation of the Matador Arch and Central Basin Platform
… region of the Central Basin Platform beneath mafic intrusions in the upper crust. Gravity anomaly maps, known basement rock location and composition from well data, and gravity models are compared to topographic maps of the Moho and midcrustal discontinuity. Seismic signature in the lower …
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GEOPHYSICAL INVESTIGATION OF GLACIER GEOMETRY AND SUBGLACIAL GEOLOGY, AND THEIR INFLUENCE ON GLACIER DYNAMICS: CASE STUDIES OF TAKU GLACIER, ALASKA AND THWAITES GLACIER, WEST ANTARCTICA
… with a maximum thickness of 1651 ± 218 m and two mafic intrusions 5 - 10-km deep with maximum thickness of ∼9 km. The sedimentary basin coincides with an area of continuous soft bed, indicating the sedimentary rock is the likely source of weak, easily deformable sediment at the bed. The …
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U-Pb geochronology of the Duluth Complex and related hypabyssal intrusions: investigating the emplacement history of a large multiphase intrusive complex related to the 1.1 Ga Midcontinent Rift.
… that created the Duluth Complex and related intrusions associated with the 1.1 Ga Midcontinent Rift in NE Minnesota. They did not, however, resolve differences in emplacement ages within and between major intrusive units due to a small number of dated samples. New high-precision U-Pb …
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Crystallisation history of rhyolite magmas at Tarawera volcano, New Zealand, from in-situ 238U-230Th disequilibrium dating and trace element geochemistry of zircon
… of buoyancy instabilities and overturn caused by mafic intrusions. Spatially heterogeneous freeze-thaw cycles could explain the co-existence of high (~75-95 %) and low degrees of crystallinity in the mush inferred from fractional crystallisation modelling of U, Th, and Th/U. The continuity of …
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Concentrations of Pt and Pd in a hydrous silicate glass
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Abundances of Lithium, Beryllium and Boron in Phenocrysts from Santorini Volcano (Greece): Implications on Magma Genesis and Eruption Mechanisms
… in understanding volcanic systems because mafic intrusions may trigger explosive silicic eruptions, as already observed in several volcanoes. An even more significant, and no less surprising, offshoot of light element analyses in this study are the estimates for magma residence time using …
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Petrologic and Fluid Inclusion Constraints on the Tectonic Evolution of the Manhattan Prong, Southeastern New York
… adjacent to the Croton Falls and Peach Lake mafic complexes, intrusions thought to be related to the Late Ordovician Cortlandt Complex, record P-T estimates of 4 kbar and 700 oC and 4.2 kbar and 550-600 oC respectively. The lack of fluid inclusions in garnet porphyroblasts indicates that the …
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The New York-Alabama Magnetic Lineament: its reflection character and relationship to the Grenville front
… to the northwest appear from the modeling to be mafic intrusions that might be related to the Norris Lake peridotite. Earthquake locations in the Eastern Tennessee Seismic Zone (ETSZ) are aligned along the southwest edge of the gradient of the NY AML, and fall within the crust characterized by …