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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.
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.
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.
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.
The Lucky Hit Mine Of Jefferson County, Montana, Bruce B. Goddard
The Lucky Hit Mine Of Jefferson County, Montana, Bruce B. Goddard
Bachelors Theses and Reports, 1928 - 1970
Many mines in the Cardwell Mining District have been more or less steady producers of gold, silver, lead and zinc since 18SO. The area first came into prominence with the discovery of gold at the Mayflower Mine in 1896. Soon after the Mayflower discovery, many claims were located in the nearby Saint Paul Gulch area, northeast of Whitehall. The Lucky Hit Mine is located in Saint Paul Gulch area of the Cardwell Mining District.
Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen
Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen
Bachelors Theses and Reports, 1928 - 1970
As the field work progressed it became apparent that very little was known of the mineralogical associations of the precious metal constituents of the Marget Ann ore. A mineralogical study in excess of that originally planned was then decided upon to determine the affiliations exhibited by the silver and gold. With these objectives in mind, the laboratory and field work continued.
The Accessory Minerals Of Some Granitic Rocks Of The Boulder Batholith, Robert T. Donahue
The Accessory Minerals Of Some Granitic Rocks Of The Boulder Batholith, Robert T. Donahue
Bachelors Theses and Reports, 1928 - 1970
Although the position of the Boulder batholith in space and time is well known, the modes of occurrence of various rock types and the inter-relationships between the petrographic types are not known in detail.
The Occurrences Of Non-Metallic Minerals In Montana, Samuel T. Mitchell
The Occurrences Of Non-Metallic Minerals In Montana, Samuel T. Mitchell
Bachelors Theses and Reports, 1928 - 1970
This thesis is essentially an abstract of the literature concerning occurrences in Montana of minerals with a non-metallic luster. The discussions give a general description of the occurrences of minerals as reported by the various references, but is not complete as less than 40 percent of the non-metallic minerals known to exist in Montana are discussed.
Chemical Analysis Of Igneous Rocks And Variation Diagrams Of Petrographic Provinces Of Montana, Frederick M. Hilpert
Chemical Analysis Of Igneous Rocks And Variation Diagrams Of Petrographic Provinces Of Montana, Frederick M. Hilpert
Bachelors Theses and Reports, 1928 - 1970
A total of 179 chemical analyses of igneous rocks are available for the state of Montana, but these analyses do not cover the entire state in a satisfactory manner. There has been an emphasis on the central part of the state, and an almost complete lack of interest in the southern portion of Montana.
A Microscopic Study Of The Ore Minerals From The Mines In The Northern Part Of The Zosell (Emery) Mining District, John P. Joyce
A Microscopic Study Of The Ore Minerals From The Mines In The Northern Part Of The Zosell (Emery) Mining District, John P. Joyce
Bachelors Theses and Reports, 1928 - 1970
Any investigation of the many gold silver producing districts of Montana will necessarily include the name Zosell. The Zosell Mining District, often referred to as the Emery District, was never a major producer in the state; however, its location, history, type of deposit, and character of ore, has drawn the interest of many prominent investigators of the mineral industry.
Czarina Mine, Butte, Montana, Prodyot K. Das
Czarina Mine, Butte, Montana, Prodyot K. Das
Bachelors Theses and Reports, 1928 - 1970
The Czarina mine operated for a short time during the last Great War, lies in the southwestern corner of the Butte mining district of Montana. This area was worked during the extensive silver mining in Butte during the 1890's, and was prospected from time to time in later years. The orebody of the mine consists of fissure fillings of manganese mineral oxidized to a certain depth, in a fracture zone of the Boulder Batholith.
Mineralization Of The Bonanza Mine, H. M. Callaway
Mineralization Of The Bonanza Mine, H. M. Callaway
Bachelors Theses and Reports, 1928 - 1970
The Bonanza mine of the Emery mining district in Powell County is on the largest veins in the area, and is developed to a depth of 680 feet by an incline shaft following the dip of the structure. Sulfide ores carrying gold and silver values are mined throughout the area which is easily accessible by road from Deerlodge, Montana, ten miles west of the district.
A Study Of The Divide-Dewey Contact Of The Boulder Batholith, Francis M. Young
A Study Of The Divide-Dewey Contact Of The Boulder Batholith, Francis M. Young
Bachelors Theses and Reports, 1928 - 1970
The batholith is dated as Paleocene or early Eocene. The rocks of the batholith in this area are classified as ranging from quartz-granodiorite to granodiorite. Variation in mineral content causes a chance in color tone from light to dark gray. swarms of inclusions occur in the igneous rock near the contact.
Physiographic Surfaces And Weathering Near Butte, Gordon B. Brox
Physiographic Surfaces And Weathering Near Butte, Gordon B. Brox
Bachelors Theses and Reports, 1928 - 1970
Three cycles of erosion have modified the Boulder batholith. The earliest cycle produced a peneplaination that has been largely obliterated by a partially completed intermediate cycle, and the recent cycle now in progress.
Geology Of Smoke Hollow Area 8 Miles Southeast Of Deerlodge, Powell County, Montana, Floyd C. Bossard
Geology Of Smoke Hollow Area 8 Miles Southeast Of Deerlodge, Powell County, Montana, Floyd C. Bossard
Bachelors Theses and Reports, 1928 - 1970
This investigation was undertaken primarily as a problem in geologic mapping. The stratigraphy was studied as to the character, age, and sequence of the geologic formations that are exposed. The conclusions were based principally on the field relationships and lithology because no fossils were found.
Structure Of Southwestern Montana, Donald W. Levandowski
Structure Of Southwestern Montana, Donald W. Levandowski
Bachelors Theses and Reports, 1928 - 1970
Intrusions of granitic rocks on a large scale are commonly found in the central part of folded mountain systems. Igneous rocks, intrusive and extrusive, are widespread in the mountains of southwestern Montana. An examination of the structural pattern of this area indicates that the fold trends form a radial pattern. How and why this pattern formed and its relation to the igneous activity in the area have not yet been discussed in the literature.
Was Assimilation Important In The Formation Of The Boulder Batholith?, Richard Marvin
Was Assimilation Important In The Formation Of The Boulder Batholith?, Richard Marvin
Bachelors Theses and Reports, 1928 - 1970
Examination of a rock suite from the northern end of the Boulder batholith reveals that four of the eight criteria for assimilation as given by Grout are present. Thus, in the opinion of the writer, there is evidence and trends to signify assimilation, but no indication of the importance that it played in the formation of the Boulder batholith.
Basic Information In The Granitic Rocks Of The Boulder Batholith, Clifford G. Sherwin
Basic Information In The Granitic Rocks Of The Boulder Batholith, Clifford G. Sherwin
Bachelors Theses and Reports, 1928 - 1970
Dark fine grained basic masses of rock are found in nearly every part of the Boulder Batholith, these commonly being referred to as inclusions, segregations, autoliths, and various other names. The origin, distribution, and composition of the dark inclusions form the basis for this report.
Geology Of The Tuxedo Mining District, R. W. Lawson, B. R. Tarrant, A. L. Gallagher
Geology Of The Tuxedo Mining District, R. W. Lawson, B. R. Tarrant, A. L. Gallagher
Bachelors Theses and Reports, 1928 - 1970
The Tuxedo mining district lies fifteen miles west of Butte on the south east end of Deer Lodge valley. Prospecting and mining has been carried on in this district for about 20 years. As a result many pits have been dug, several adits have been driven, and two or three shallow shafts have been sunk.
Contact Metamorphism In The Highlands, Frank Trask Jr.
Contact Metamorphism In The Highlands, Frank Trask Jr.
Bachelors Theses and Reports, 1928 - 1970
On the southern margin of the Boulder Batholith, about twenty miles south of Butte in the Highland Mountains, there are many miles of contact between the igneous and sedimentary rocks. As two kinds of igneous rocks and many different kinds of sedimentary rock are present, it is an excellent place for the study of contact metamorphism.
Attempted Proofs Of The Differentiation Of Magmas By Syntexis, Clifford Wendel
Attempted Proofs Of The Differentiation Of Magmas By Syntexis, Clifford Wendel
Bachelors Theses and Reports, 1928 - 1970
This investigation was an effort to obtain proof of the much disputed principle that most of the observed magnetic differentiations have been due to the assimilation, or syntexis, of the intruded country rocks.
A Microscopic Study Of Some Volcanic Rocks In The Vicinity Of Butte, Evan Gustafson
A Microscopic Study Of Some Volcanic Rocks In The Vicinity Of Butte, Evan Gustafson
Bachelors Theses and Reports, 1928 - 1970
The rhyolite rocks in the vicinity of Big Butte present a very interesting, though complicated study. It seems that no extensive or conclusive work has ever been done upon these extrusives.
I have found that the rhyolites present a very interesting problem, especially microscopically, and that no doubt an intensive study along these lines will solve the problems concerning age relations of different flows and origin of the magma that produced the material for emanations.
Age Relationships Of Ore Deposits Of Southwestern Montana (A Microscopic Study), Charles R. Trueworthy
Age Relationships Of Ore Deposits Of Southwestern Montana (A Microscopic Study), Charles R. Trueworthy
Bachelors Theses and Reports, 1928 - 1970
Although considerable work has been undertaken by some prominent geologists, the best known of which is that of Paul Billingsley and J. A. Grimes', in investigating the ore deposits of the Boulder Batholith and surrounding area, there has not been any complete microscopic investigation of these deposits, as a whole, published in the literature. With this in mind it was suggested to the writer by Professor Paul A. Schafer, of the Montana School of Mines, that a microscopic study of the ores of this region would be a worthwhile geologic problem.
It was thought that the mineral association and the …