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Affects Of Thermal Assimilation And Low Grade Metamorphism On A Xenolith Bearing Basalt Dike In Marquette, Michigan, William E. Coons
Affects Of Thermal Assimilation And Low Grade Metamorphism On A Xenolith Bearing Basalt Dike In Marquette, Michigan, William E. Coons
Masters Theses
No abstract provided.
Trace Fossils Of The Brassfield Formation, Lower Silurian, In South-Central Ohio And North Central Kentucky, Eugene J. Murray
Trace Fossils Of The Brassfield Formation, Lower Silurian, In South-Central Ohio And North Central Kentucky, Eugene J. Murray
Masters Theses
No abstract provided.
Some Pegmatites Near Gwinn, Michigan, Michael J. Moss
Some Pegmatites Near Gwinn, Michigan, Michael J. Moss
Masters Theses
No abstract provided.
A Petrographic And Spectrographic Analysis Of Several Soapstone Artifacts From Tennessee And Soapstone Deposits In North Carolina And South Carolina: In An Attempt To Determine The Source Area Of The Artifacts, Earl Roger Bohanan
Masters Theses
Several soapstone artifacts from Late Archaic-Early Woodland archaeological sites in Tennessee and ten soapstone deposits, two in South Carolina and eight in North Carolina were analyzed by X-ray diffraction, X-ray spectroscopy and petrographically in an attempt to correlate the artifacts and deposits. The data show that two of the deposits, Shelton Mine and Watermellon Branch, exhibit the best correlation with some of the artifacts. However, the evidence isn't conclusive.
Petrographic analysis revealed that the deposits and artifacts consist of one of two distinct mineral assemblages, one consisting of talc, chlorite, and anthophyllite, and a second in which talc, chlorite, and …
Tertiary Welded Tuffs Of The Ryan Spring Area, Needle Range, Beaver County, Utah, Peter Carlyle Rauch
Tertiary Welded Tuffs Of The Ryan Spring Area, Needle Range, Beaver County, Utah, Peter Carlyle Rauch
Masters Theses
"The Needle Range of southwestern Utah is composed of Paleozoic sediments overlain by a thick sequence of Tertiary volcanic rocks primarily of the welded tuff class. The area has undergone at least four stages of post-eruptive structural deformation. The most significant stage is that which formed the range by normal Basin and Range type faulting. The faults strike northwest and tilt the volcanic layers northeast.
The volcanic section is composed primarily of the Needles Range Formation (Oligocene) overlain by the Isom Formation and underlain by several flows and ash flows, one of which has been tentatively correlated to the Escalante …
Fluid Inclusion Geothermometry Of Tri-State Sphalerite, Chi-Sheng Wei
Fluid Inclusion Geothermometry Of Tri-State Sphalerite, Chi-Sheng Wei
Masters Theses
"Fluid inclusions in successively deposited generations of sphalerite from the Tri-State district have been examined for geothermometry as a function of time. The main stage of vug-filling sphalerite has been studied most intensively and as many as 83 fluid inclusions have been examined in a single crystal. These sphalerite crystals are commonly zoned, and their filling temperatures exhibit a general pattern of declining temperature from their cores outward, from about 135°C down to 90°C. The decline is not a steady one, but rather it is characterized by fluctuations commonly about 15-20°C. Some fluctuations have magnitudes as great as 50-60°C, with …
Geochemical And Biogeochemical Studies In The Hansonburg Mining District, New Mexico, Alan Nathan Silverman
Geochemical And Biogeochemical Studies In The Hansonburg Mining District, New Mexico, Alan Nathan Silverman
Masters Theses
"The Hansonburg mining district is in Socorro county in south central New Mexico. A Paleozoic section of thick Pennsylvanian limestone units, thin shale and arkose layers and thick Permian units of sandstone, siltstone and gypsiferous beds interlayered with thin limestone units unconformably overlie a Precambrian basement of granite. The sedimentary rocks are folded with north trends and plunges. Northerly, some easterly and northwesterly trending faults cut the folds. Galena, fluorite, and barite mineralization occurs along some of the northerly faults and as bedded replacements and fissure fillings in the Pennsylvanian Council Spring limestone.
Geological mapping and geochemical soil surveys of …
Heavy Metal Contamination In Soil Around A Lead Smelter In Southeast Missouri, David Lewis Butherus
Heavy Metal Contamination In Soil Around A Lead Smelter In Southeast Missouri, David Lewis Butherus
Masters Theses
"In order to determine the extent of possible heavy metal contamination, more than 963 samples of leaf litter and soil were collected from 410 sample stations around the AMAX smelter in southeast Missouri. Dried samples of leaf litter and minus 80 mesh soil fractions were analyzed for cadmium, copper, lead, and zinc by atomic absorption spectrophotometry. Minus 80 mesh soil fractions were also analyzed for sulfur using x-ray fluorescence methods. Ranges of heavy metal concentrations in leaf litter were: cadmium, 0.13 μg/g to 175 μg/g; copper, 4.2 μg/g to 6500 μg/g; lead, 50 μg/g to 130,000 μg/g; and zinc, 26 …