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Showing 1 to 13 of 13 for “"anisotropy of magnetic susceptibility"”.
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Heterogeneous internal fabric of the Mount Barcroft pluton, White Mountains, of eastern California: an anisotropy of magnetic susceptibility study
Anisotropy of magnetic susceptibility (AMS) have been used with great success for determining the internal structure and fabrics of Jurassic and Cretaceous plutons of felsic-intermediate compositions in the White-Inyo Range of eastern California. However, application of the AMS techniques to the …
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A study of anisotropy of magnetic susceptibility’s effectiveness in understanding palaeoflow systematics in shale basins
… in shale-prone basins can be difficult, but anisotropy of magnetic susceptibility (AMS) has the sensitivity and ease of use to be widely applicable. Three distinct shale basins were selected, the turbidite Ainsa Basin, the shelfedge of the Welsh Borderlands and the hemiplegic Marcellus Shales …
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Petrofabric investigation of the sulfide-rich basal zone of the Duluth Complex
The South Kawishiwi Intrusion (SKI) of the 1.1 Ga Duluth Complex hosts significant Cu–Ni–PGE sulfide deposits concentrated within its basal contact zone. Although the geochemical signatures of these ores are well documented, the physical mechanisms responsible for focusing sulfur-rich melts remain …
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Timing and emplacement of the Philipsburg batholith, SW Montana, and a comparison of two magnetic fabric techniques
Magnetic anisotropy is widely used for measuring the orientation of minerals in many rock types. The anisotropy of magnetic susceptibility (AMS) is used extensively to determine magma flow fabrics in both intrusive and extrusive igneous rocks. The anisotropy of anhysteretic remanent magnetization …
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Aspects of Deformation and Strain in the Appalachian Fold -Thrust Belt (New York) and the Shear Zones of the Sveconorwegian Orogen (Norway)
This dissertation addresses aspects of structural geology in two locations. In the first chapter, detailed geologic mapping and preliminary cross-sectional construction define along-strike changes in the structural architecture of the Alleghanian (Late Paleozoic) northern Appalachian foreland …
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Tertiary and carboniferous magmatism around Lundy Island and the outer Bristol Channel - a geophysical and geochemical perspective
… volcanic complexes with positive gravity and magnetic anomalies, some centres associated with both large volumes of continental flood basalts and regional dyke swarms. The Lundy Island is the southern most expression of Tertiary volcanism and consists of granite intruded by around 200 dykes …
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Palaeozoic Palaeomagnetism of South-Eastern Australia
The drift history of Gondwana following the break-up of Rodinia (or perhaps Pannotia) to the amalgamation into Pangaea has great implications in many disciplines in Earth sciences, but remains largely unknown. Among the apparent polar wander (APW) paths published for Gondwana in the last few …
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Pluton emplacement, aureole deformation and metamorphism, and regional deformation within the central White-Inyo Range, Eastern California
… in eastern California is a deformed section of Neoproterozoic through Cambrian sedimentary rocks which has been intruded by granitic plutons associated with the Mesozoic Sierra Nevada intrusive suites to the west. My dissertation involves a characterization of the pre-plutonic regional …
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Fluid inclusions as a monitor of progressive grain-scale deformation during cooling of the Papoose Flat pluton, eastern California
Analyses of fluid inclusions and microstructures within the Papoose Flat pluton were used to investigate the chemistry and temperatures of fluids circulating with the pluton during cooling. Based on previous microstructural analyses, the interior of this late Cretaceous granitic to granodioritic …
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Emplacement of the Santa Rita Flat pluton and kinematic analysis of cross cutting shear zones, eastern California
This study documents the deformation history of the Santa Rita Flat pluton, eastern California, from the time of emplacement to post-emplacement transpressional shearing, and consists of manuscripts that make up three chapters. The first chapter addresses the emplacement of the Santa Rita Flat …
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Paleomagnetic and AMS results from Oligocene ash-flow tuffs of the eastern San Juan Mountains : implications for the evolution of the western margin of the San Luis Basin, northern Rio Grande Rift
The San Luis Basin (SLB) of the northern Rio Grande rift (RGR) is a spectacular intermontane basin in south-central Colorado. The SLB is an east-dipping, half graben basin that formed in response to extension beginning ca. 26 Ma in the Cordillera. Oligocene ash-flow tuffs exposed in the eastern San …
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Structure and Accretion at Mid-Ocean Ridges With High Magma Supply: Perspectives From Seafloor Escarpments and Iceland
<p>Despite vast amounts of data about the ocean floor, very little is known about processes operating at mid-ocean ridge spreading centers and the generation of oceanic lithosphere that covers approximately 2/3 of Earth's surface. In particular, geologist are uncertain about specific details of …
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Architettura e meccanismi di costruzione di complessi granitoidi post-collisionali: studio integrato di terreno, microstrutturale, AMS ed EBSD del Batolite tardo varisico delle Serre (Calabria meridionale)
… nel CVP, dove affiora solo la porzione profonda-intermedia del batolite, l'attività di terreno e gli studi petrografici hanno permesso di separare il promontorio in un settore settentrionale, caratterizzato da un'esposizione continua dei granitoidi profondi-intermedi, e in un settore …