Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Early Permian"”.
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DEPOSITIONAL SYSTEMS INTERPRETATION OF EARLY PERMIAN MIXED SILICICLASTICS AND CARBONATES, MIDLAND BASIN, TEXAS
In this study, a core from the Midland basin of West Texas was examined in detail to determine the depositional setting of an Upper Wolfcampian and Lower Leonardian-aged mudstone succession. The studied sediments were deposited close to the center of the Midland Basin in a deep water, mixed …
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Paleoenvironment and paleoclimate of NE Pangea in early Permian-linking chemo- and cyclo-stratigraphy, Bogda Mountains, NW China
… Gondwanan glacial-interglacial in mid Sakmarian-early Kungurian provides clues that glaciation may have exerted a substantial control on climatic changes in mid-latitude Northern Hemisphere"--Abstract, page iv.</p>
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Paleomagnetic and mineral magnetic studies of zinc-lead ore deposits in the Metaline (Washington state, USA) and Midlands (Ireland) ore fields
… reside in magnetite, were acquired during the Early Permian at 288+-8 Ma at Galmoy and 276+-6 Ma at Lisheen. These Early Permian paleomagnetic ages postdate the Asturian deformational phase of the Variscan orogeny and suggest an entirely epigenetic Variscan model of ore genesis in which the …
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Depositional and Diagenetic History of the Permian Unayzah A Reservoir, South Haradh, Saudi Arabia with Implications for Deep Gas Exploration and Development
The Early Permian Unayzah A member in the Ghawar area of east-central Saudi Arabia is a prolific gas producer but is characterized by significant reservoir heterogeneity related to complex interbedding, on the scale of 5 meters or less, of eolian dune, sand sheet, interdune and ephemeral (playa) …
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Depositional conditions, stratigraphic evolution, and allo- and autogenic controls of lower Permian non-marine carbonate rocks, Lucaogou low-order cycle, Bogda Mountains, NW china
… of lacustrine carbonate deposits of the lower Permian Lucaogou low-order cycle in the greater Turpan-Junggar continental rift basin, NW China. The depositional environments of ten carbonate lithofacies in the Tarlong-Taodonggou half graben and the Zhaobishan section were interpreted. Allo- and …
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The sedimentology and stratigraphy of Salt Creek Field, Kent County, Texas
… of the largest hydrocarbon accumulations in the Permian Basin, with a cumulative production of more than 2.7 Bbbl since 1948. This atoll is contemporaneous with the Late Paleozoic Ice Age (LPIA), perhaps the best-known Phanerozoic phase of glaciation after the Pleistocene. The Pennsylvanian-Early …
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The sedimentology and petrology of the new red sandstone of the Elgin Basin, North East Scotland
… at Elgin, deposition began during the Upper Permian with a series of sheetflood deposits which graded laterally into seif dunes to the north. Deposition during the Triassic is dominated by aeolian barchan dunes although minor point bar, playa and floodplain deposits were' present. A caliche, …
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Large-scale hydrothermal dolomitisation in the southwestern Cantabrian Zone (NW Spain) : causes and controls of the process and origin of the dolomitising fluids
… both have a dull red and unzoned CL and are nearly stoichiometric and well ordered. They display depletion in Sr, and enrichment in Fe and Mn relative to the precursor carbonates. They have wide-ranging d18O values (-3 to -12 ‰ PDB), distinctly lower than those of the precursors. On the …
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Paleozoic Stratigraphy and Structure at Iron Point, Humboldt County, North-Central Nevada
… contraction and is likely correlative to early Permian folds observed at Edna Mountain (Villa, 2007; Cashman et al., 2011). F2 folds are upright, symmetrical, and trend west-southwest. The King fault is a normal fault that strikes north-south and dips east. It post-dates the first two fold …
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Metals hosts in the Pennsylvanian Hushpuckney and Stark Black Shales from Selected Areas in Kansas City
… the Ouachita uplift to the south during the early Permian. Elemental variation with depth, and interelemental correlations were determined using scanning XRF for a variety of major, minor, and trace elements, including Si, Al, Fe, Mg, Ca, K, and P (major elements), minor Ba, S, Co, Cu, Ni, …
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INTO THE STRUCTURE OF THE PERMIAN DEEP CONTINENTAL CRUST: A MULTISCALE APPROACH TO RECONSTRUCT MIGMATIZATION IN THE VALPELLINE SERIES (DENT BLANCHE TECTONIC SYSTEM, WESTERN ITALIAN ALPS)
… lithospheric mantle and deep crust. During the Permian, the Variscan lithosphere was affected by extension due to the Pangea break up followed by Tethys opening. This Thesis investigates the evolution of the Valpelline Series in the Dent-Blanche Tectonic System (Western Italian Alps) which …
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Depositional Facies and Petrophysical Characterization of the Leonardian Carbonate (Lower Clear Fork), Tex-Mex, S.E. Field, Central Basin Platform, West Texas
… deposited in shallow marine water during the Early Permian. The sediment of the Lower Clear Fork is composed of a mixed succession of dolomite interbedded with anhydrite, minor clay minerals, and siliciclastics. The high heterolithic nature of the reservoir makes efficient recovery of …
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BIOMINERALIZATION AND GLOBAL CHANGE: BIOTIC RESPONSE TO THE GONDWANAN GLACIATION AND SUBSEQUENT CLIMATE WARMING
… years comprising the Carboniferous and the Permian, has been the theatre of dramatic climate changes. Starting from greenhouse climatic conditions, this time-interval witnessed the transition to icehouse conditions in the late Visean, with the onset of the Late Palaeozoic Ice Age, one of the …