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- Boulder Batholith (6)
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Articles 1 - 15 of 15
Full-Text Articles in Geological 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.
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.
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.
Geology Of An Area Near Montana City, Montana, Frank A. Crowley
Geology Of An Area Near Montana City, Montana, Frank A. Crowley
Bachelors Theses and Reports, 1928 - 1970
The investigated area lies about five miles south of Helena, Montana, near the abandoned gold camp of Montana City. Topographically, the area reflects the sedimentary formations and the igneous rocks, quartz monzonite and rhyolite. Static recrystallization of the sedimentary rocks caused by the intrusion of the Boulder Batholith, along with deformation of sedimentary beds by pre-batholithic folding and by post-batholithic faulting have complicated the geologic picture.
The Placer Deposits Of The Siberia District (German Gulch), Montana, Ronald D. Karvinen
The Placer Deposits Of The Siberia District (German Gulch), Montana, Ronald D. Karvinen
Bachelors Theses and Reports, 1928 - 1970
The original concept of this problem was to determine if hidden or buried placers existed past the terminal point of the extensive placering in the Siberia District. Several theories have been advanced for the sudden cessation of those placers. All are plausible, and are both for and against an extended placer. The past history relates that some $13,000,000 in gold has been produced in the area, therefore stressing a practical search for additional accumulation.
Fluorite On The Wrong Font Claim, Robert L. Clayton
Fluorite On The Wrong Font Claim, Robert L. Clayton
Bachelors Theses and Reports, 1928 - 1970
The Wrong Front claim lies west of Butte near Nissler Junction. It is owned by Thomas J. Helehan of Butte. The deposit is epithermal and lies within the Boulder Batholith. The host rocks are granite, alaskite and andesite with granite being the most prominent host rock.
Geology Of A Mineralized Breccia "Pipe" Near Basin, Montana, James W. Allan
Geology Of A Mineralized Breccia "Pipe" Near Basin, Montana, James W. Allan
Bachelors Theses and Reports, 1928 - 1970
Located on the western flank of the Boulder batholith of southwestern Montana, the mineralized breccia "pipe" is opened by the Obelisk Mine. The intersection of two fault systems in the quartz monzonite of the Boulder batholith has provided the locus of the breccia "pipe". There is fairly conclusive evidence indicating that the present outcrop of the "pipe" lies only a few hundred feet below the former "roof" of the batholith.
Southwestern Extension Of The Pondera Field, Paul P. Garding
Southwestern Extension Of The Pondera Field, Paul P. Garding
Bachelors Theses and Reports, 1928 - 1970
Oil was discovered in the Pondera field in June 1927 following work done by E.B. Emrick. The initial discovery well, located in section 17, T. 27 N., R. 4 W., was not a commercial oil producer. Its initial production being 3 barrels of oil and 3,500,000 cubic feet of gas per day. Rapid expansion followed until 1929, when the field reached its peak of production.
Tungsten Mineralization At The Strawberry Mine, Pony, Montana, Robert L. Meyer
Tungsten Mineralization At The Strawberry Mine, Pony, Montana, Robert L. Meyer
Bachelors Theses and Reports, 1928 - 1970
The Strawberry Mine, located four miles west of Pony, Montana, for many years an intermittent producer of gold are, is once again the scene of mining activity due to the discovery of scheelite in 1953.
New Techniques For Ore Search, Paul L. Allsman
New Techniques For Ore Search, Paul L. Allsman
Bachelors Theses and Reports, 1928 - 1970
This report is a survey of the newest methods in use for mineral exploration. It will attempt to review the newest techniques in the fields of geophysics, geologic research and theories of ore deposits, exploratory drilling, mapping methods and other tools of mineral exploration. Then a preview of coming and predicted techniques will comprise a summary.
Stratigraphy Of Kootenai In Montana, B. B. Jarrett
Stratigraphy Of Kootenai In Montana, B. B. Jarrett
Bachelors Theses and Reports, 1928 - 1970
The Kootenai of Montana is a variable formation as far as composition is concerned. The formation consisting largely of a series of sandstones, shales, and shaly sandstones. The presence of the limestone and carbonaceous members being irregular indicating variable climatic conditions throughout the deposition of the sediments. The fresh water environment being confined to the western slope, while the central and the eastern portions had more swampy conditions with local fresh water depositions.
The Groundwater Of The Area North Of Flathead Lake, Montana, Frederick M. Hilpert
The Groundwater Of The Area North Of Flathead Lake, Montana, Frederick M. Hilpert
Bachelors Theses and Reports, 1928 - 1970
The purpose of this investigation is to determine the reasons for the ground water variations in the area north of Flathead Lake, Montana. Several methods were used in pursuing this investigation. Hydrographs were made of the various wells showing the season to season change as well as the year to year variation.