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Stratigraphy and sedimentary petrology of the Mesozoic rocks of the Waterman Mountains, Pima County, ArizonaHall, Dwight Lyman, 1953- January 1985 (has links)
No description available.
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STRUCTURE AND HYDROTHERMAL ALTERATION OF THE DIAMOND JOE STOCK, MOHAVE COUNTY, ARIZONA (FELDSPAR, QUARTZ, SERICITE).GERLA, PHILIP JOSEPH. January 1983 (has links)
The origin of fractures in plutons has been ascribed to differential stress resulting from regional tectonics, magmatic emplacement, crystallization, and cooling. The evolution of stress, and hence the evolution of fractures in plutons, controls the timing and spatial distribution of fluid flow and alteration. Quantitative data on fracture orientation, density, vein width, and alteration systematically obtained from the 70-m.y.-old Diamond Joe stock, west-central Arizona, were used to determine the evolution of stress and fractures within the stock during its crystallization. The dome-shaped chamber of the predominantly quartz monzonite stock is 8 km in diameter. Regional east-northeast compression produced the north-northwest crustal dilation necessary for the ascent and emplacement of the stock. Two-dimensional models using analytic solutions for stress in elastic media indicate that the prominent radial fractures within the stock developed in response to magma pressure, contraction, and regional stress. Most fractures formed by tensile failure during cooling, although magma pressure led to shear failure near the center. Deflection of radial fractures away from the east-northeast axis of the pluton at increasing distances from the center indicates north-northwest and east-northeast orientation of regional maximum and minimum principal stress, respectively, during crystallization. Apparently, north-northwest-trending uplift in the vicinity of the pluton led to a shallow local reversal of principal stress after magma emplacement. Theoretical strain estimates show a correlation with high fracture densities and abundant alteration along the north-northwest axis and the pluton margins. Zones of fracture selvage K-feldspar+quartz, muscovite+K-feldspar+quartz, and muscovite+chlorite+quartz alteration are concentric about the center of the stock and extend a short distance into the surrounding host rocks. Younger sericite+K-feldspar, argillic, and carbonate alteration occurs locally. Mineral equilibria and fluid inclusion data indicate low hydrothermal temperatures ( < 150°C) near the center of the stock and higher temperatures (200°C-400°C) near the margins. Apparently, fractures continued to open and fill as cooling proceeded within the center of the stock, whereas fluid circulation ceased at higher temperatures near the margins.
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Geology and Water Resources of Sulphur Spring Valley, ArizonaMeinzer, O. E., Kelton, F. C., Forbes, R. H. 30 June 1913 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project. / A reprint of Water-Supp1y Paper 320, United States Geological Survey. United States Department of the Interior, being No. 3 cooperative, between United States Departments and the Arizona Agricultural Experiment Station. / Chapter on agriculture by R. H. Forbes
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Studies of geologic structures by paleomagnetic methodsChampney, Richard Daniel, Champney, Richard Daniel January 1971 (has links)
No description available.
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Origin and stratigraphic relations of the basal bolsa quartzite conglomerate on Dos Cabezas Ridge, Cochise County, ArizonaWortman, Ann Aber January 1984 (has links)
No description available.
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Geology of the Campo Bonito area, Oracle, ArizonaLudden, Raymond Woodbury, 1919- January 1950 (has links)
No description available.
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Kinematic analysis of deformation at the margin of a regional shear zone, Buehman Canyon area, Santa Catalina Mountains, ArizonaBykerk-Kauffman, Ann, Bykerk-Kauffman, Ann January 1983 (has links)
No description available.
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Structural geology and tectonic history of the Geesaman Wash area, Santa Catalina Mountains, ArizonaJanecke, Susanne Ursula, 1959- January 1986 (has links)
No description available.
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Stratigraphy, structure, and mineralization of the Pajarito Mountains, Santa Cruz County, ArizonaRiggs, Nancy Rosalind, 1956- January 1985 (has links)
No description available.
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Superposed thrusting in the northern Granite Wash Mountains, La Paz County, ArizonaCunningham, William Dickson, 1960- January 1986 (has links)
No description available.
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