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in subjects: "Petrography"  
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Evidence of former higher temperatures from alteration minerals, Bostic 1-A well, Mountain Home, Idaho

Description: Cuttings from the silicic volcanics in the Bostic 1-A well near Mountain Home, Idaho have been examined petrographically with the assistance of x-ray diffraction and electron microprobe analyses. Results indicate that these rocks have been subjected to much higher temperatures than were observed in the well in 1974, when a static temperature log was run. It is not known to what extent the alternation may be due to greater depth of burial in the past, or whether it resulted from an early hydroth… more
Date: January 1, 1982
Creator: Arney, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Characterization of Oil and Gas Reservoir Heterogeneity

Description: The ultimate objective of this cooperative research project is to characterize Alaskan petroleum reservoirs in terms of their reserves, physical and chemical properties, geologic configuration in relation to lithofacies and structure, and development potential. The project has two tasks: Task 1 is a geological description of the reservoirs including petrophysical properties, i.e., porosity, permeability, permeability variation, formation depth, temperature, and net pay, facies changes and reser… more
Date: January 1, 1992
Creator: Sharma, G. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization of facies and permeability patterns in carbonate reservoirs based on outcrop analogs

Description: The primary objective of this research is to develop methods for better describing the three-dimensional geometry of carbonate reservoir flow units as related to conventional or enhanced recovery of oil. Detailed characterization of geologic facies and rock permeability in reservoir-scale outcrops of the Permian San Andres Formation in the Guadalupe Mountains of New Mexico will provide the key data base. To this end detailed sampling on grids using a portable core-plugging device was undertaken… more
Date: January 1, 1991
Creator: Kerans, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical trends in the Ice Springs basalt, Black Rock Desert, Utah

Description: The Holocene Ice Springs volcanic field of west-central Utah consists of 0.53 km/sup 3/ of tholeiitic basalts erupted as a sequence of nested cinder cones and associated lava flows. Whole rock x-ray fluorescence and atomic absorption analysis of ninety-six samples of known relative age document statistically significant inter- and intra-eruption chemical variations. Elemental trends include increases in Ti, Fe, Ca, P, and Sr and decreases in Si, K, Rb, Ni, Cr, and Zr with decreasing age. Microp… more
Date: June 1980
Creator: Lynch, W. C. & Nash, W. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydrothermal alteration in well Baca 22, Baca geothermal area, Valles Caldera, New Mexico

Description: A number of exploration wells were drilled to supply steam for a proposed electric generating plant. Drill cuttings from one of these wells, Baca 22, were studied with a petrographic microscope and by x-ray diffraction to determine the nature of the original rocks and of the hydrothermal alteration. The hydrothermal alteration is used to determine the temperatures of alteration which can then be compared with borehole temperatures to determine if the mineral assemblages are compatible with pres… more
Date: January 1, 1984
Creator: Fox, D.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geology of the Hanna Formation, Hanna Underground Coal Gasification Site, Hanna, Wyoming

Description: The Hanna Underground Coal Gasification (UCG) study area consists of the SW1/4 of Section 29 and the E1/2SE1/4 of Section 30 in Township 22 North, Range 81 West, Wyoming. Regionally, this is located in the coal-bearing Hanna Syncline of the Hanna Basin in southeast Wyoming. The structure of the site is characterized by beds dipping gently to the northeast. An east-west fault graben complex interrupts this basic trend in the center of the area. The target coal bed of the UCG experiments was the … more
Date: January 1, 1984
Creator: Oliver, R.L. & Youngberg, A.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Data base for the analysis of compositional characteristics of coal seams and macerals. Part 7. Petrographic variation due to depositional setting of the lower Kittanning seam, western Pennsylvania. Final report

Description: Detailed megascopic and microscopic petrographic analyses were conducted on samples of the Lower Kittanning seam from western Pennsylvania. Relationships were sought between the paleoenvironmental setting of the coal swamp and the vertical and lateral variability of lithotypes, maceral composition and vitrinite types. Megascopically, the four samples collected from the freshwater facies of the seam are similar in appearance and relative lithotype composition, and display no distinct vertical zo… more
Date: January 1, 1984
Creator: Allshouse, S.D. & Davis, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of a fossil geothermal system, Hamblin-Cleopatra Volcano, Clark County, Nevada. Final technical report

Description: The Hamblin-Cleopatra volcano, selected for study because erosion and fault displacement have exposed the entire volcanic succession, the intrusive core, a radial dike systems, and sedimentary and volcanic rocks that predate and postdate the volcano, was investigated to estimate the proportions of igneous materials forming lava flows, pyroclastic deposits, intrusive bodies, and reworked debris. Chemical changes in the magma throughout the active period of the volcano were documented. The geothe… more
Date: July 28, 1986
Creator: Barker, D.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Petrology, geochronology, and chemical evolution of the Twin Peaks Rhyolite Domes, Utah

Description: Two distinct sequences of silicic volcanism at the Twin Peaks volcanic field, Millard County, Utah, spanned periods from 2.74 +- .10 to 2.54 +- .09 m.y. and 2.43 +- .08 to 2.35 +- .08 m.y., and produced a total exposed volume of 4 km/sup 3/ of rhyolites and volcanoclastics. Wet chemical, x-ray fluorescence, microprobe, atomic absorption, and neutron activation methods have been employed to obtain a wide range of chemical data on whole rock and mineral separate samples. Calculated distribution c… more
Date: May 1, 1980
Creator: Crecraft, H. R.; Nash, W. P. & Evans, S. H., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Special core analysis for western tight sands. Project 61031 annual report, August 1, 1980-July 31, 1981

Description: This report presents the results of laboratory investigations of low-permeability sandstones at the Institute of Gas Technology (IGT), Chicago. The core samples used in these studies were from the following wells: (1) Mapco RBU 11-17F well from the Uinta Basin, Utah; and (2) PTS 24-19 Federal from Sublette County, Wyoming. Core samples from the Greater Green River Basin in Wyoming were also used in some of the experiments. Permeability to gas was measured as a function of pore pressure, confini… more
Date: January 1, 1982
Creator: Sampath, K. & Rose, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of Oil and Gas Reservoir Heterogeneity

Description: The ultimate objective of this cooperative research project is to characterize Alaskan petroleum reservoirs in terms of their reserves, physical and chemical properties, geologic configuration in relation to lithofacies and structure, and development potential. The project has two tasks: Task 1 is a geological description of the reservoirs including petrophysical properties, i.e., porosity, permeability, permeability variation, formation depth, temperature, and net pay, facies changes and reser… more
Date: January 1, 1991
Creator: Sharma, G. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of western coals and coal macerals by solid-state nuclear magnetic resonance spectroscopy. Progress report, August 1, 1981-January 31, 1982

Description: Two bituminous coals were selected on the basis of petrographic analysis as having high concentrations of vitrinite, inertinite and liptinite. These coal samples were ground up to about 10-3 ..mu..m, treated with HCl and HF to remove the mineral matter, and the macerals were separated by density gradient centrifugation. Structural features of the three different macerals were obtained by NMR analysis based on conventional CP/MAS and multiple pulse multi-dimensional /sup 13/C NMR spectroscopy. R… more
Date: January 1, 1982
Creator: Pugmire, R. J. & Grant, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Study of sonic, neutron, and density logging of low-permeability gas sands. Final report

Description: Gas accumulations in Lower Tertiary and Upper Cretaceous formations are the object of widespread exploration in the Tight Western Gas Sands. The complex lithology of these formations has hindered the usefulness of the sonic, density, and neutron logs. Current log evaluation practices assume a matrix density of 2.68 gm/cc and a matrix travel-time of 52.6 microseconds/ft. The neutron log is calibrated for a sandstone matrix. Conventional analysis yields inconsistent and often contradictory result… more
Date: May 1, 1982
Creator: Osoba, J.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Secondary minerals found in the cores DC2 A1 and DC2 A2 taken from the Grande Ronde Basalt Formation, Pasco Basin, Washington

Description: The results obtained for Task I are presented and discussed in this report. The subject of Task I is the study and identification of secondary mineral assemblages in two slant cores drilled off core DC2. The data were obtained from scanning electron microscopic (SEM/EDAX), x-ray diffraction (XRD), and thin section petrographic studies. In addition, an attempt was made to determine the lateral continuity of the secondary mineralization and the extent to which the fissures in this potential repos… more
Date: January 1, 1980
Creator: Teague, L.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemistry and mineralogy of samples from the strategic petroleum reserve Bryan Mound site

Description: The goal of the Strategic Petroleum Reserve (SPR) program is to protect the United States from a temporary cutoff of imported crude oil by stockpiling a reserve of oil in caverns in Gulf Coast salt domes. Some suitable caverns already exist as a result of solution mining activities by commercial mining companies. Most of the caverns for the program, however, will be solution mined specifically for the SPR program. The tasks assigned to Sandia National Laboratories include conducting a geotechni… more
Date: August 1, 1980
Creator: Bild, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characteristics of American coals in relation to their conversion into clean-energy fuels. Final report. [1150 samples of US coals]

Description: To further characterize the Nation's coals, the Penn State Coal Sample Bank and Data Base were expanded to include a total of 1150 coal samples. The Sample Bank includes full-seam channel samples as well as samples of lithotypes, seam benches, and sub-seam sections. To the extent feasible and appropriate basic compositional data were generated for each sample and validated and computerized. These data include: proximate analysis, ultimate analysis, sulfur forms analysis, calorific value, macera… more
Date: June 1, 1982
Creator: Spackman, W.; Davis, A.; Walker, P. L.; Lovell, H. L.; Vastola, F. J.; Given, P. H. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of Oil and Gas Reservoir Heterogeneity

Description: The objective of the cooperative research program is to characterize Alaskan reservoirs in terms of their reserves, physical and chemical properties, geologic configuration and structure, and the development potential. The tasks completed during this period include: (1) geologic reservoir description of Endicott Field; (2) petrographic characterization of core samples taken from selected stratigraphic horizons of the West Sak and Ugnu (Brookian) wells; (3) development of a polydispersed thermod… more
Date: January 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of Oil and Gas Reservoir Heterogeneity

Description: The ultimate objective of this cooperative research project is to characterize Alaskan petroleum reservoirs in terms of their reserves, physical and chemical properties, geologic configuration in relation to lithofacies and structure, and development potential. The project has two tasks: Task 1 is a geological description of the reservoirs including petrophysical properties, i.e., porosity, permeability, permeability variation, formation depth, temperature, and net pay, facies changes and reser… more
Date: January 1, 1991
Creator: Sharma, G. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Anisotropic yielding of rocks at high temperatures and pressures

Description: Results to date are: All of the starting materials for the three year project have been collected. Included in our collection are relatively fine-grained, fresh, oriented blocks of schist, gneiss, and micaceous quartzite with well-defined foliations and lineations as well as granite blocks oriented with respect to the principal quarrying orientations, the rift, grain, and hardway. A suite of samples has also been collected from an exposed granite stock and surrounding country rocks in order to … more
Date: December 1, 1987
Creator: Kronenberg, A.K.; Russell, J.E.; Handin, J.; Gottschalk, R.R. & Shea, W.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Petrographic analysis and correlation of volcanic rocks in Bostic 1-A well near Mountain Home, Idaho

Description: Detailed examination of volcanic rock cuttings from the Bostic 1-A well near Mountain Home, Idaho, provides data that correlate the stratigraphy of the well with the regional stratigraphy of the western Snake River Plain. The Bostic 1-A well penetrates basalt of the Middle Pleistocene Bruneau Formation and underlying sedimentary rocks of the Upper Pliocene Glenns Ferry Formation. Basalt underlying the Glenns Ferry Formation is most likely Banbury Basalt of Middle Pliocene age or Banbury equival… more
Date: January 1, 1984
Creator: Arney, B.H.; Gardner, J.N. & Belluomini, S.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Anisotropic yielding of rocks at high temperatures and pressures; Annual Progress Report, 1988-1989

Description: The experimental results we have obtained on Four-Mile gneiss have demonstrated that the yield behavior of quartzo-feldspathic rocks containing only a small percentage (10%) of mica can be markedly anisotropic, provided the mica minerals exhibit a strong crystallographic preferred orientation. Samples of gneiss oriented such that resolved shear stresses on the foliation plane are large are considerably weaker than granites of similar grain size and composition, and this weakness is attributed t… more
Date: November 30, 1989
Creator: Kronenberg, A. K.; Russell, J. E. & Carter, N. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical, petrographic, and K-Ar age data to accompany reconnaissance geologic strip map from Kingman to south of Bill Williams Mountain, Arizona

Description: As part of a reconnaissance mapping project, 40 chemical analyses and 13 potassium-argon age dates were obtained for Tertiary volcanic and Precambrian granitic rocks between Kingman and Bill Williams Mountain, Arizona. The dated volcanic rocks range in age from 5.5 +- 0.2 Myr for basalt in the East Juniper Mountains to about 25 Myr for a biotite-pyroxene andesite. The date for Picacho Butte, a rhyodacite in the Mt. Floyd volcanic field, was 9.8 +- 0.07 Myr, making it the oldest rhyodacite dome … more
Date: April 1, 1985
Creator: Arney, B.; Goff, F. & Eddy, A.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Recommended analysis plan for the borehole plugging program potash core test

Description: A four-year old plugged potash core hole near the Waste Isolation Pilot Plant (WIPP) site in southeastern New Mexico has been proposed for overcoring, in order to examine the behavior of known grout mix constituents in contact with a variety of rock types during an extended grout-curing interval. This report recommends that various geochemical analyses be applied to the core samples containing both grout and rock and the interface between the two. The methods to be used include optical petrogra… more
Date: May 1, 1980
Creator: Lambert, S. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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