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Articles 1 - 6 of 6
Full-Text Articles in Engineering
Geology And Mineral Resources Of Indochina, Au- Ngoc- Ho
Geology And Mineral Resources Of Indochina, Au- Ngoc- Ho
Bachelors Theses and Reports, 1928 - 1970
Located between the 100th and the 110th longitude east of Greenwich, between the 8th and 24th latitude north, Indochina is a peninsula known as "the balcony of Southeast Asia". It's three states Laos, Cambodia and Vietnam occupy an area as large as 770,000 square kilometers.
Correlation Of Ordovician And Silurian Formations Of Eastern Montana, Marvin A. Lanphere
Correlation Of Ordovician And Silurian Formations Of Eastern Montana, Marvin A. Lanphere
Bachelors Theses and Reports, 1928 - 1970
Correlation charts made from electric log data show the relationship of Ordovician and Silurian strata in eastern Montana. The Silurian sediments terminate westward in eastern Montana, but the Ordovician sediments are present westward into central Montana.
Paragenesis Of The Primary Ores Of The Norwich Mine, Edward E. Scheitlin
Paragenesis Of The Primary Ores Of The Norwich Mine, Edward E. Scheitlin
Bachelors Theses and Reports, 1928 - 1970
The Norwich vein is thought to belong to the Anaconda vein system. It contains fairly large deposits of manganese. The study of 19 thin sections and 15 polished sections was made to determine the paragenesis of the vein minerals, which is: quartz-pyrite, rhodochrosite, quartz, minor rhodochrosite, quartz-pyrite-sphalerite, galena, freibergite and later quartz. Some supergene rhodochrosite was found and most of the silver minerals were found to be supergene origin.
Geology Of A Portion Of The Hand Mine, Argenta Mining District, Beaverhead County, Montana, John Thomas Richards
Geology Of A Portion Of The Hand Mine, Argenta Mining District, Beaverhead County, Montana, John Thomas Richards
Bachelors Theses and Reports, 1928 - 1970
The Hand Mine is located in the Argenta Mining District near the town of Argenta. The area surrounding the Hand Mine is characterized by intense thrusting, folding, and igneous activity. The area mapped by the author is in the southeast portion of the mine and differs from the rest of the mine in that no commercial ore has been found. The writer concludes that the steep faulting and flatlying bodies are of two different ages, and that intense oxidation has altered the ore minerals to plumbojarosite.
Oxidized Copper Mineralization Along The Continental Fault Near Butte, Montana, Theodore H. Eyde
Oxidized Copper Mineralization Along The Continental Fault Near Butte, Montana, Theodore H. Eyde
Bachelors Theses and Reports, 1928 - 1970
Located in the fault zone of the Continental fault near the western edge of Boulder batholith of southwestern Montana the oxidized copper deposits are developed by three open pit mines, one of which is a presently in operation. Copper has been deposited by descending cold solutions which have leached copper from the surrounding quartz monzonite and deposited within the crushed fault zone. Local high grade 'bunches' of ore occur along narrow limonite veins, remnants of primary sulfide veins which have been enriched by the descending cold solutions.
Uranium Occurrences In The Pacific Northwest, Charles Van Alstine
Uranium Occurrences In The Pacific Northwest, Charles Van Alstine
Bachelors Theses and Reports, 1928 - 1970
Uranium prospecting and production in the United States have been largely concentrated in the southwestern states, especially the plateau region of Utah, Colorado, Arizona and New Mexico. However, even with meager prospecting, numerous occurrences of uranium materials have been found in the Pacific northwest. These occurrences are in rooks ranging in age from pre-Cambrian Belt series to Tertiary volcanics and lake beds.