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Articles 2281 - 2310 of 2534

Full-Text Articles in Geophysics and Seismology

Sandstones Of The Lance And Fort Union Formations, Alan G. Conner May 1948

Sandstones Of The Lance And Fort Union Formations, Alan G. Conner

Bachelors Theses and Reports, 1928 - 1970

The Fort Union and Lance formations are widespread terrestrial sediments exposed in Montana, North Dakota, South Dakota, Wyoming, and Canada. Their stratigraphic position, especially that of the Lance, has long been in doubt, and has provoked much controversy among geologists.

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Flotation Concentration Of A Montana Lead-Zinc-Silver-Ore, Grover W. Gregson May 1948

Flotation Concentration Of A Montana Lead-Zinc-Silver-Ore, Grover W. Gregson

Bachelors Theses and Reports, 1928 - 1970

The Mike Horse mine, in the Huddelston mining district, is fifty-two miles northwest of Helena, Montana. The mine was discovered in 1898 by Joseph Heitmiller. There was only minor production from the date of discovery until 1915; the main drawback being lack of good road.

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The Geology And Mineral Deposits Of British Columbia, John A. Downing May 1948

The Geology And Mineral Deposits Of British Columbia, John A. Downing

Bachelors Theses and Reports, 1928 - 1970

The province of British Columbia, with an area of 359,279 square miles, includes a large part of the Canadian Cordillera that is the western mountains of Canada. It is the leading province of Canada in the production of lead, zinc, and silver, and third among the provinces in the output of gold, copper, and coal.

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Karst Kamp Asbestos Deposits Gallatin County, Montana, Thomas L. Wilson May 1948

Karst Kamp Asbestos Deposits Gallatin County, Montana, Thomas L. Wilson

Bachelors Theses and Reports, 1928 - 1970

Karst Kamp, a southwestern Montana recreation re­sort, is 32 road miles south of Bozeman on the east bank of the Gallatin River in a narrow V-shaped valley flanked on the west by the rugged Madison mountain range and on the east by the equally rough Gallatin range. The asbestos deposit itself lies approximate­ly one-half mile northwest of the ranch on a heavily timbered "Al­pine-like" slope nearly 1200 feet above the floor of the valley.

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Geology Of The Lost Creek-Modesty Creek Area Deerlodge County, Montana, Howard B. Nickelson, Robert L. Pott May 1948

Geology Of The Lost Creek-Modesty Creek Area Deerlodge County, Montana, Howard B. Nickelson, Robert L. Pott

Bachelors Theses and Reports, 1928 - 1970

In 1915 the United States Geological Survey published a folio by Calkins and Emmons on the geology of the Philipsburg Quadrangle, which ad­joins the area now under study to the west. Geology of this portion of Montana had not been mapped previously; consequently the purpose of this thesis is to make a geological reconnais­sance of the stratigraphy and structure of the area.

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A Study Of The Action Of Various Energizers In The Carburization Of Steel, William N. Warren May 1948

A Study Of The Action Of Various Energizers In The Carburization Of Steel, William N. Warren

Bachelors Theses and Reports, 1928 - 1970

The object of casehardening is to produce articles of steel having a tough or ductile interior and a hard sur­face. Quenching produces a surface somewhat harder than the interior, but in order to obtain a high surface hard­ness, the percentage of alloying elements in the steel must be raised to such an extent that the core or central por­tion becomes hard and brittle also.

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A Study Of The Diffusion Of Electroplated Coatings In The Solid State., Michael R. Writt May 1948

A Study Of The Diffusion Of Electroplated Coatings In The Solid State., Michael R. Writt

Bachelors Theses and Reports, 1928 - 1970

The term diffusion means an equalization or homogenization of diverse materials. Specifically ap­plied to metals, diffusion is the interchange of atoms. It is, in effect, an invasion of one crystal lattice by the atoms of one or more other crystal lattices. Therefore, the study of diffusion must involve the geometry and physics of crystal lattices as well as their energies.

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Leaching Of Low Grade Rhodochrosite, E. D. King May 1948

Leaching Of Low Grade Rhodochrosite, E. D. King

Bachelors Theses and Reports, 1928 - 1970

Although there are many uses for manganese today, none of them approaches its importance as a deoxidizing agent in the manufac­ture of steels. Without manganese the steelmaking in­dustry would be very seriously handicapped. The metal­lurgy of manganese has been developed around the high-grade ores, and unfortunately, our reserves of high-grade ores are very limited.

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Geology And Ore Deposits Of The Salt Chuck-Rush And Brown Mine Area Prince Of Wales Island, Alaska, Judson H. Whitman May 1948

Geology And Ore Deposits Of The Salt Chuck-Rush And Brown Mine Area Prince Of Wales Island, Alaska, Judson H. Whitman

Bachelors Theses and Reports, 1928 - 1970

The Salt Chuck, Rush and Brown, and adjacent mines and claims form an area of approximately 15 square miles near the head of Kasaan Bay about 10 miles northwest of the village of Kasaan on Prince of Wales Island in southeastern Alaska. It is an area of moderate relief in which the hills rise from the water’s edge to heights of some 500 feet. Most of the area is covered with dense vegetation and muskeg.

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A Study Of The Physical Properties Of Low Tin Solders, Cornelius P. Dwyer Apr 1948

A Study Of The Physical Properties Of Low Tin Solders, Cornelius P. Dwyer

Bachelors Theses and Reports, 1928 - 1970

In 1947, out of the 100,000 long tons of tin con­sumed in the United States, 25,000 tons went into solder. Tin plate took 39,000 tons while babbit, bronze and coll­apsible tubes accounted for approximately 17,000 tons. Solder ranked second to tin plate and required more than the next three major uses combined.

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The Effect Of Manganese And Magnesium On The Hardening Of Copper-Aluminum Alloys, Robert M. Hansen Apr 1948

The Effect Of Manganese And Magnesium On The Hardening Of Copper-Aluminum Alloys, Robert M. Hansen

Bachelors Theses and Reports, 1928 - 1970

During recent years, duralumin and all aluminum alloys have been made the object of much discussion regarding their hardening mechanism. The commercial success of nearly all of the alloys of aluminum and mag­nesium is dependent on their ability to age or precipitation harden.

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An Investigation Of The Anodic Oxidation Of Aluminum In A Sulfuric Acid Electrolyte, William D. Michaely Apr 1948

An Investigation Of The Anodic Oxidation Of Aluminum In A Sulfuric Acid Electrolyte, William D. Michaely

Bachelors Theses and Reports, 1928 - 1970

When aluminum is allowed to stand in air or is heated in air, a thin oxide film is produced on the metal. If aluminum is made the anode in a suitable electrolyte and a current applied, a coating is obtained which is similar to that produced in air, but may be effected much quicker. This film is thicker, harder, more resistant to corrosion and abrasion, and more adhesive than the natural oxide. The film is porous and makes an excellent adsorptive for dyes and pigments.

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Oxygen Enriched Atmosphere Roasting, Clarence Wells Jr Apr 1948

Oxygen Enriched Atmosphere Roasting, Clarence Wells Jr

Bachelors Theses and Reports, 1928 - 1970

The possible benefits of oxygen enriched atmosphere roasting have been known to metallurgists for many years, but only since the development of equipment and processes to produce cheap oxygen in very large amounts has much ser­ious consideration been given this matter.

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An Investigation Of Age-Hardening In A Commercial Copper-Beryllium Alloy, Terry Horne Apr 1948

An Investigation Of Age-Hardening In A Commercial Copper-Beryllium Alloy, Terry Horne

Bachelors Theses and Reports, 1928 - 1970

This investigation is concerned with the age-hardening process as exemplified by the aging of a commercial Cu-Be alloy and, in particular, with this pro­cess as determined by X-ray methods. The amount of infor­mation available on age-hardening of commercial alloys is scanty and what information there is, is inaccurate.

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The Electrodeposition Of Iron-Manganese Alloys, Kenneth H. Larson Apr 1948

The Electrodeposition Of Iron-Manganese Alloys, Kenneth H. Larson

Bachelors Theses and Reports, 1928 - 1970

Although the alteration of properties resulting from the alloying of metals in their usual commercial forms has been extensively investigated, the field of electrodeposition of alloys is believed generally not to have received the atten­tion that it merits.

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A Preliminary Study Of The Benefication Of Montana Kyanite, Donald Paul Mccarthy Apr 1948

A Preliminary Study Of The Benefication Of Montana Kyanite, Donald Paul Mccarthy

Bachelors Theses and Reports, 1928 - 1970

This investigation is a preliminary study of the beneficiation of Montana kyanite, and while preliminary in degree the information gained may serve as a guide for the eventual exploitation of this Montana resource.

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Foraminifera From Pleistocene Beds Near San Pedro, California, R. F. Mitchell Apr 1948

Foraminifera From Pleistocene Beds Near San Pedro, California, R. F. Mitchell

Bachelors Theses and Reports, 1928 - 1970

The age of rocks found in drill cores, and consequently the depths to possible oil-bearing formations has in many localities been determined by micro-paleontologic studies during the past three decades. Of the different micro-fossils used in this work, foraminifera have been studied most, are the best described, and hence, by far the most helpful.

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Geology Of Upper Bear Gulch And Dry Boulder Creek Area Madison County, Montana, Norman King Apr 1948

Geology Of Upper Bear Gulch And Dry Boulder Creek Area Madison County, Montana, Norman King

Bachelors Theses and Reports, 1928 - 1970

Potential gold mines lie high among the rugged peaks of the Tobacco Root Mountains of southwestern Montana. This is a region where little geologic work has been done, though extensive mine operations have been carried on, and valuable ore has been shipped.

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Geology 63: Geological Report Of Senior Field Trip, Thomas L. Wilson Jan 1948

Geology 63: Geological Report Of Senior Field Trip, Thomas L. Wilson

Bachelors Theses and Reports, 1928 - 1970

The field work was conducted in areas adjacent to White­hall, Montana, as has been the custom for the past several years. Instruction in the proper use of the telescopic and open sight alidades, and the Brunton compass for surveying geologic features was given. Advantages of pacing and speed­ometer mapping were pointed out and used.

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A Geological Report On South Boulder Canyon And The Mayflower Mine-Renova Areas, B. R. Alto Jan 1948

A Geological Report On South Boulder Canyon And The Mayflower Mine-Renova Areas, B. R. Alto

Bachelors Theses and Reports, 1928 - 1970

The purpose of this report is to serve as a written explanation of the accompanying geologic maps and columnar sec­tion. Each year the senior students in mining and geological engineering at the Montana School of Mines spend two weeks in the field where they learn the fundamentals of geologic mapping and related field studies. An additional week is spent at the school where maps are assembled, prints made, end other work is done in preparation for the writing of the report.

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Geology Of The Renova-Bone Basin And Mayflower Mine Areas, R. L. Burns Sep 1947

Geology Of The Renova-Bone Basin And Mayflower Mine Areas, R. L. Burns

Bachelors Theses and Reports, 1928 - 1970

This report has been compiled from the data collected during the September, 1947, geologic field trip of the Montana School of Mines. The trip, under the direction of Dr. E. S. Perry, consisted of two weeks of field mapping and observation near Whitehall, Montana, and one week at the Montana School of Mines preparing this report.

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A Geological Report On Several Localities In The Northwestern Tobacco Root Mountains, Rudi Forhan Sep 1947

A Geological Report On Several Localities In The Northwestern Tobacco Root Mountains, Rudi Forhan

Bachelors Theses and Reports, 1928 - 1970

To better acquaint seniors in Geology and mining with actual field practice, the Montana School of Mines offer a course in Geologic Field Mapping, during the three weeks preceding the opening of the fall semester. The first two weeks are spent in actual field mapping of the geologic formations near Whitehall, Montana, while the third week is spent back on the campus compiling data and finishing maps started in the field.

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Mayflower, Renova Basin, And South Boulder Creek Areas, Howard Nickelson Sep 1947

Mayflower, Renova Basin, And South Boulder Creek Areas, Howard Nickelson

Bachelors Theses and Reports, 1928 - 1970

In Montana at the turn of the century a great many men sought the riches buried in the earth's crust. Prospectors fanning out from Butte and other early Montana mining areas located veins at the Mayflower, Renova, and Gold Hill areas.

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Geology And Mines Of The Upper Blackfoot Valley, Montana, Thomas K. Shea Jun 1947

Geology And Mines Of The Upper Blackfoot Valley, Montana, Thomas K. Shea

Bachelors Theses and Reports, 1928 - 1970

The purchase and continued operation of the Mike Horse mine in the Heddleston district, by the American Smelting and Re­fining Company, gives the Blackfoot Valley a renewed promise of a prosperous future in its role as a mining district. In the past, large amounts of placer gold were recovered from the gulches of the area, however, because of the transporta­tion facilities, only the upper portions of a few lodes were exploited by the early miners.

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Rugose Corals Of The Madison Group, William R. Paine Jun 1947

Rugose Corals Of The Madison Group, William R. Paine

Bachelors Theses and Reports, 1928 - 1970

One of the best types of index fossils, and one which occurs most plentifully in the Madison group of formations in Montana, and yet, one which has been little studied, is the group of rugose, or cup, corals. Perhaps this group of fossils has not been studied in detail because their distinguishing characteristics are mainly internal, and labo­ratory preparation in the form of thin section or polished surfaces is necessary to bring out these characteristics.

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Kibbey Sandstone In Montana, Glen Shean Jun 1947

Kibbey Sandstone In Montana, Glen Shean

Bachelors Theses and Reports, 1928 - 1970

Much attention has recently been given, by geolog­ists, to prolific water bearing horizon and a potent­ial oil horizon, known as the Kibbey sandstone, which lies deeply buried under much of central Montana. In some local­ities the sandstone is dry, and its identification in cut­tings from deep wells has in many cases proved difficult.

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The Geology And Ore Deposits Of The Ruby Gulch Mine, Henry J. Roletto, John X. Combo May 1947

The Geology And Ore Deposits Of The Ruby Gulch Mine, Henry J. Roletto, John X. Combo

Bachelors Theses and Reports, 1928 - 1970

The Ruby Gulch Mine, owned and operated by the Ruby Gulch Mining Company, Zortman, Montana, is one of the most important low-grade gold producers in the state. Sit­uated in the Little Rocky Mountains, the mine has had an interesting history since its discovery shortly before the turn of the century.

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An Investigation Of A Particular Weldment Failure, Byron Clow May 1947

An Investigation Of A Particular Weldment Failure, Byron Clow

Bachelors Theses and Reports, 1928 - 1970

Two sets of weld-test coupons, supposedly made under identical conditions, were submitted to this institution last year for approval and certification under the A.S.M.E. Welder's Qualification Code. The first set of coupons was unsatisfactory. The second set, made by the same operators one month later, was satisfactory.

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Corrosion Testing Of Iron-Tin Alloys By The Salt Spray Method, Bernard T. Mcdonald May 1947

Corrosion Testing Of Iron-Tin Alloys By The Salt Spray Method, Bernard T. Mcdonald

Bachelors Theses and Reports, 1928 - 1970

The purpose of this study was to determine the rela­tive rate of corrosion of iron-tin alloys containing low percentages of tin. Since in the world today, a great deal of work is being done to develop large tin deposits and new methods devised to treat these ores, it is possible that the metal will become abundant and will obtain a more important position in the metal industry.

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The Corrosion Resistance Of Iron-Tin Compacts As Produced By Powder Metallurgy, Robert W. Gambill May 1947

The Corrosion Resistance Of Iron-Tin Compacts As Produced By Powder Metallurgy, Robert W. Gambill

Bachelors Theses and Reports, 1928 - 1970

The art of Powder Metallurgy deals with the preparation of metal powders and their utilization. As a more pertinent definition, the following has been suggest­ed: "Powder Metallurgy is the art of producing metal powders and shaped objects from individual, mixed, or alloyed metal powders, with or without the inclusion of non-metallic consti­tuents".

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