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Wayne Mountjoy

Publications and source records attributed to Wayne Mountjoy.

6 recordsLinked to original sources
USGS1986

NORMATIVE MINERALOGY OF OIL SHALE IN THE JUHAN CORE HOLE 4-1, PICEANCE CREEK BASIN, COLORADO.

A procedure for calculating the quantities of normative minerals and kerogen in Colorado oil shale was developed and used to analyze a sequence of sodium-rich oil shales in a core hole near the depocenter of the Piceance Creek Basin in northwestern Colorado. The sequence of oil shales was found to average 48. 1 weight percent carbonate minerals, 32. 5 percent silicate minerals, 1. 9 percent pyrite, and 17. 5 percent kerogen. Dawsonite left bracket NaAl(OH)//2CO//3 right bracket and quartz are associated to a high degree in the vertical sequence, but no significant trends between mineral abundances and depth were noted.

Conference Paper↗
USGS1977

Removal of fluorine and lithium from hectorite by solutions spanning a wide range of pH

One-gram samples of hectorite were treated with 40 millilitres each of hydrochloric acid (6 N ), acetic acid (4.5 N ), distilled water, natural seawater, sodium chloride (0.6 N ), and sodium hydroxide (2.5 N ) for 10 days in stoppered plastic centrifuge tubes. X-ray diffraction patterns show that the structure was virtually destroyed by the hydrochloric and acetic acids. Analyses of the supernatant liquids were made to determine amounts of the elements removed by the various treatments. All treatments removed at least some SiO 2 , MgO, CaO, Li 2 O, and F. The acids removed most of the lithium and magnesium after 3 days. The fluorine and the magnesium released by the acetic acid began to form sellaite (MgF 2 ). After 5 days, sufficient sellaite was produced to be discernible by X-ray diffraction. The loss of silica from the sample when it was treated with sodium hydroxide amounted to about 10 percent of the total sample.

Journal of Research of the U.S. Geological Survey↗
USGS1975

Influence of caustic and water leaching on analcime-bearing and analcime-free pyrolyzed oil shale from the Green River Formation, Piceance Creek Basin, Colorado

The influence of oil-shale mineral constitution on the amounts of Na 2 O, Al 2 O 3 , and SiO 2 extractable from pyrolyzed oil shale using hot water and hot caustic solvents has been examined. Samples of oil shale from two drill cores and one composite sample from the Colony mine were split and studied by X-ray diffraction methods to determine their bulk mineralogy. Oil yield data were obtained for these samples by conventional Fischer assay analysis and samples of the spent oil shale were studied by X-ray diffraction to determine the changes which resulted from pyrolysis. The amounts of Na 2 O, Al 2 O 3 , and SiO 2 extractable from 31 spent oil-shale samples were determined using hot distilled water, hot 0.1M KOH, and hot 0.5M KOH as solvents. Extractable Al 2 O and SiO 2 were also determined for the 31 spent oil-shale samples using hot 0.1M NaOH and hot 0.5M NaOH. Correlation of the relative abundance of analcime--Na[Al, Si 2 O 6 ]. H 2 0-- in raw oil-shale samples with the amounts of Na 2 O, Al 2 O 3 , and SiO 2 extracted from pyrolyzed oil shale demonstrates that analcime contributes significantly to all of these elements after it has been subjected to pyrolysis. Because of the large contribution of SiO 2 extractable from pyrolyzed analcime-bearing oil shale using caustic solvents, there may be significant problems in obtaining leachates high in Al 2 O 3 content and low in SiO 2 content where analcime is present with dawsonite--NaAl(OH) 2 CO 3 . This consideration is important to assessment of potential aluminum resources in oil shale. In addition, the concentrations of water soluble Na 2 O, Al 2 O 3 , and SiO 2 in analcime-bearing pyrolyzed oil shale are expected to be significantly greater than from oil shale which is free of analcime and dawsonite and this factor reflects the importance of oil-shale mineralogy to aspects of spent shale disposal

Colorado↗
USGS1973

Identification of a lithium-bearing smectite from Spor Mountain, Utah

Chemical analyses, X-ray diffraction data, and cation exchange determinations are given for a lithium-bearing smectite. The X-ray data and Greene-Kelly's lithium test indicate the presence of both dioctahedral and trioctahedral phases. The exchange determinations indicate that the lithium is in the structure of the clay, and the chemical data are intermediate between those for hectorite and montmorillonite. All data indicate that the clay is a mixture of hectorite and montmorillonite.

Utah↗