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Showing 1 to 17 of 17 for “"igneous rock"”.
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Geometry and construction history of a complex intrusive center in the shallow crust, Mount Pennell, Henry Mountains, Utah
Large igneous intrusions grow from incremental emplacement of relatively small batches of magma. The Henry Mountains have been the subject of investigation because multiple, well-exposed intrusive centers are present on the Colorado Plateau. Mount Pennell is an asymmetric intrusive center in the …
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Reservoir petrology and production characteristics of the Lytton Springs Oil Field, Caldwell County, Texas
… employed to study the mineralogy of the altered igneous rock commonly referred to as serpentine, from which the oil is being produced. Decline curves were used to study the production characteristics of the field and to make predictions as to the effect of gravity drainage on future production.
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Ο ΠΛΟΥΤΩΝΙΤΗΣ ΤΗΣ ΜΑΡΩΝΕΙΑΣ ΚΑΙ Η ΜΕΤΑΜΟΡΦΙΚΗ ΤΟΥ ΕΠΙΔΡΑΣΗ ΣΤΑ ΠΕΡΙΒΑΛΛΟΝΤΑ ΠΕΤΡΩΜΑΤΑ ΤΗΣ ΦΥΛΛΙΤΙΚΗΣ ΣΕΙΡΑΣ
… THE PLUTON BELONGS TO THE CALC-ALCALINE ROCK SERIES AND FROM A PETROGENETIC ASPECT IT IS CHARACTERIZED AS AN IGNEOUS ROCK BELONGING TO THE I-TYPE OR MAGNETITE SERIES (M ORIGIN). THE SHALLOW INTRUSION OF THE MARONIA PLUTON DURING ITS CRYSTALLIZATION OF THE MAKRI SERIES WHICH CONSIST OF …
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Canister design for deep borehole disposal of nuclear waste
… in the form of spent reactor fuel, into a deep igneous rock environment with particular emphasis on thermal performance. The proposed boreholes are 3 to 5 km deep, in igneous rock such as granite. The rock must be in a geologically stable area from a volcanic and tectonic standpoint, and it …
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An evaluation of the feasibility of disposal of nuclear waste in very deep boreholes
Deep boreholes, 3 to 5 km into igneous rock, such as granite, are evaluated for next- generation repository use in the disposal of spent nuclear fuel and other high level waste. The primary focus is on the stability and solubility of waste species, waste forms, and canister materials in saline, …
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Petrography of Four Rock Units Exposed in the Campbell Red Lake Mines, Ontario
… on the Precambrian Shield. There are four main rock units recognized at the mine: “andesite”, “altered rock”, “siliceous rock”, and “Campbell diorite”. These units have been presumed to be igneous in origin and intruded by lamprophyre, quartz-feldspar porphyry, and grey dikes. Samples of the …
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Investigating the Occurrence and Effects of Fragmentation: Analysis of Rockfall Videos Captured During Slope Maintenance Campaigns
Rockfall is a gravity-driven natural hazard common in mountainous areas, that poses a risk to infrastructure and human life. Understanding rockfall frequency and potential trajectories are essential for the safe design of roads and railways. This is traditionally through analysis of the slope and …
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Geology of igneous extrusive and intrusive rocks in the Sundance area, Crook County, Wyoming
<p>Two major igneous rock types occur in the Sundance, Wyoming area including foyaite of the Bear Lodge Mountain sill and quartz latite of Sundance Mountain and Sugarloaf Mountain. The igneous bodies were mapped on a scale of 1:5000 in an effort to determine petrogenetic relationships between the …
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Origin and Emplacement Mechanisms of the Slieve Gullion Ring Dyke Complex, Ireland
The purpose of this research was to study the rock units of the Slieve Gullion ring dyke complex, to determine their composition, structure and position within the stratigraphic sequence; as well as producing a model for the emplacement of these units. A combination of detailed field observations, …
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The geochemistry and petrogenesis of the Saltpeterkop carbonatite complex near Sutherland, Northern Cape, South Africa
… that host fresh to only moderately altered igneous rocks. The main igneous rock types include (in decreasing order of abundance): carbonatite, potassic trachyte, olivine melilitite and ultramafic lamprophyre. This thesis provides the first detailed petrographic and geochemical description of …
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On Ultra-High Temperature Metamorphism in the Mid-Lower Crust
… (UHT) metamorphic processes and country rock-magma interaction due to mappable units of hybrid igneous rocks and the presence of large, partially melted, politic "emery" xenoliths. Previous attempts to understand the formation of the UHT xenoliths in the Cortlandt have provided the …
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Spatially controlled Fe isotope variations at Torres Del Paine
… non-traditional stable isotope ratios in igneous rocks with differentiation index. We present new Fe isotope data for the Torres del Paine igneous complex in southern Chile. The multi-composition pluton consists of a 1.5 km vertical exposure of homogenous granite overlying a …
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Geologic stochastic modeling of rock fracture systems related to crustal faults
… the polygons with fractured and intact rock; 3) a zone marking process that retains or discards the polygons according to their location in the modeling volume; 4) a process that translates and rotates the polygons from their original position in order to accommodate local geologic …
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Stratigraphy and sedimentary history of middle Cenozoic (Oligocene and Miocene) deposits in North Dakota
… the petrography and sedimentary history of these rocks.</p> <p>Middle Cenozoic strata in North Dakota are largely restricted to isolated buttes in Adams, Bowman, Dunn, Golden Valley, Grant, Hettinger, Slope, and Stark Counties. These deposits consist of 125 to 560 feet of cross-bedded sandstone, …
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Geochemical and isotopic constraints on the source regions of phanerozoic carbonatites and associated alkaline rocks from the Zandkopsdrift complex of Namaqualand, South Africa, and the Marinkas Quellen, and Dicker Willem complexes in Namibia
… carbonatites and related alkaline silicate rocks from Zandkopsdrift in Namaqualand, South Africa (55 Ma), and Marinkas Quellen (529 Ma), and Dicker Willem (49 Ma) in southern Namibia, all emplaced within the Proterozoic Namaqua Natal province. The aims of this thesis are to characterise …
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Characterizing Provenance of the Late Wisconsinan Rainy Lobe Using Fine-Fraction Geochemistry and Detrital Zircon Geochronology
… of felsic shield lithologies and Duluth Complex rocks with a corresponding decrease in carbonate. These two models of Rainy lobe till sedimentology are evaluated using mixing models, till matrix geochemistry, and detrital zircon geochronology. The multicomponent mixing model is developed to …
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Petrogenesis of Eocene-Oligocene magmatism of the Sulphur Springs Range, central Nevada: The role of magma mixing
… intrusions and cogenetic volcanic rocks in the range exhibit evidence of magma mixing and invite comparisons with other mineralized, Eocene mixed magma systems like the Bingham porphyry Cu deposit 300 km farther to the east. The Sulphur Springs igneous suite ranges compositionally …