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Full-Text Articles in Physical Sciences and Mathematics
Geochemical Fingerprinting Of Volcanic Airfall Deposits : A Tool In Stratigraphic Correlation, Soumava Adhya
Geochemical Fingerprinting Of Volcanic Airfall Deposits : A Tool In Stratigraphic Correlation, Soumava Adhya
Legacy Theses & Dissertations (2009 - 2024)
Chemical fingerprints of volcanic airfall deposits obtained from high-precision electron microprobe analysis of glass and phenocrysts phases provide geochemical correlations with temporal precision unattainable by other methods. In this research electron microprobe analysis (EMA) techniques, to fingerprint chemically and correlate fresh and altered volcanic airfall deposits, have been utilized to test the value of this tool for future research on stratigraphic correlation. The following samples were chosen from within a variety of sedimentary rocks widely separated spatially and temporally:
Sediment Characteristics Around The Kenyon Island Group, Great Sacandaga Lake (Ny): Economic Potential Of Dredging And Land Reclamation, Arthur M. Ambrosino
Sediment Characteristics Around The Kenyon Island Group, Great Sacandaga Lake (Ny): Economic Potential Of Dredging And Land Reclamation, Arthur M. Ambrosino
Geology Theses and Dissertations
The Kenyon Island Group lies within the Great Sacandaga Lake's largest and most unnavigable shallow water shoal. The shoal measures approximately 5.0 mi2. The Kenyon Islands, including Mead and Deer Islands, occupy approximately 3/4 mi2 during the months of annual high lake level. During the late shallow water season of 1998, a NE to SW diagonal transect of nine core samples were collected by a Geoprobe coring device, with recoveries between 8' and 16' deep sections. In this study these cores were used to identify the stratigraphy, classify the sediment grain sizes, evaluate the abundance of economic …
Identifying Key Variables Associated With The Temporal And Spatial Distribution Of Prolific Marine Petroleum Source Rock (Mpsr) Units And Its Application To The Taconic Foreland Basin, Eastern New York, C. Mark Achong
Geology Theses and Dissertations
Correctly identifying key variables associated with the temporal and spatial distribution of prolific marine petroleum source rock (MPSR) units is of critical importance towards the future development of models accurately predicting their existence and effective exploitation. The geographic positioning and prevailing paleoclimatic conditions on paleocontinental reconstructions, in combination with the processes controlling the drowning of continental margins and parameters associated with the establishment of high biologic productivity and long term anoxic conditions within the water column, have been pursued as first-order constraints controlling the development of some prolific marine petroleum source rock (MPSR) deposits. From this, a model has been …
Thermal-Mechanical Response To An Intruding Magma Chamber, Christoph Arz
Thermal-Mechanical Response To An Intruding Magma Chamber, Christoph Arz
Geology Theses and Dissertations
The thermal-mechanical response of rock at shallow to medium depth beneath the earth's surface has been modeled as a magma body ascends toward it. The overall stress field is calculated by considering the country rock as a viscous fluid, a thermal-elastic material, or as an elasto-plastic material that fractures when its strength is overcome.
The stress field within and around a spherical magma body surrounded by a homogeneous, Newtonian fluid has been evaluated and can be used at deeper levels in the earth's crust where the viscosity of the country rock is relatively low. With decreasing depth wall rock material …
The Petrochemistry Of The Ankara Volcanics, Central Turkey, Jay A. Ach
The Petrochemistry Of The Ankara Volcanics, Central Turkey, Jay A. Ach
Geology Theses and Dissertations
The Ankara volcanics comprise a small volcanic field immediately to the north of Ankara, Turkey. This volcanic field is composed of a mixture of flows, tuffs, and agglomerates, with the flows ranging in composition from high-K basaltic andesite to rhyolite. Dacitic flows are the most common. A potassium-argon date gives a Middle Eocene age of 42.0 ± 1.6 m.y. The volcanics unconformably overlie Paleozoic sediments of the "Cimmerian continent" to the south and Mesozoic rocks of the Ankara melange to the north.
Results of analyses on 25 samples for major elements and Y, Sr, Rb, Ni, Cr, V, Co, Zn, …