Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Publication Year
- Publication
- Publication Type
Articles 1 - 16 of 16
Full-Text Articles in Physical Sciences and Mathematics
Alteration Reactions In A Hornblende-Biotite-Anthophyllite-Fluid System: Implications For Cu-Au Ore Deposits, James Mitchell Lightner
Alteration Reactions In A Hornblende-Biotite-Anthophyllite-Fluid System: Implications For Cu-Au Ore Deposits, James Mitchell Lightner
Graduate Research Theses & Dissertations
High-grade porphyry Cu-Au ore deposits are typically contained in the potassic alteration zone, which forms through the alteration of preexisting country rock by a magmatic volatile phase (MVP) exsolved from an igneous intrusion. The MVP is a H2O dominant phase that contains high concentrations of NaCl, KCl, FeCl2, HCl, sulfur (as H2S or SO2) and minor concentrations of metals. The minerals in the potassic alteration zone are predominantly K-feldspar and biotite with a shreddy texture. Shreddy biotite forms from the replacement of prismatic-tabular shaped hornblende crystals, resulting in a characteristic shreddy texture. The alteration of hornblende to biotite can neutralize …
Ni And Fe Isotope Fractionation During Weathering And The Formation Of Ni Laterite Ore Deposits In The Philippines, Congxi Zhu
Electronic Thesis and Dissertation Repository
Weathering processes on Ni-rich ultramafic rocks in tropical areas produce laterites that become exploitable for Ni mining. To better understand these processes, samples were collected stratigraphically with water samples from several Ni mines in the Philippines and studied for Ni and Fe isotope compositions. This study found that Ni isotope fractionation takes place during the formation of Ni-enriched minerals (goethite), when light Ni isotopes are preferentially incorporated into new minerals formed, leaving heavy Ni isotopes in groundwater. The Δ60NiLimonite-Bedrock is up to -0.19 ± 0.32‰. Even though Fe is partitioned with redox state change during these reactions, …
The Paleozoic Sedimentary Rocks Of The Ouachita Mountains And Their Genetic Relationship To The Mississippi Valley-Type Mineralization In The Southern Ozark Region: Insights From Radiogenic Pb Isotopes And Trace Elements Studies, Christophe Wakamya Simbo
The Paleozoic Sedimentary Rocks Of The Ouachita Mountains And Their Genetic Relationship To The Mississippi Valley-Type Mineralization In The Southern Ozark Region: Insights From Radiogenic Pb Isotopes And Trace Elements Studies, Christophe Wakamya Simbo
Graduate Theses and Dissertations
Cluster of Pb and/or Zn deposits of the well-known Tri-State and Northern Arkansas Mississippi Valley Type (MVT) districts located north of the Arkoma basin and the Ouachita fold-thrust belt in north America are genetically connected to the Pennsylvanian-Permian Ouachita orogeny which triggered a South-North topographic gradient flow of basinal brines, leaching metal rich sediments en route. The objective of the research is twofold. First, to ascertain whether the organic-rich shales and sandstones from the study area provided metals during the mineralization event, which was coeval with the Ouachita orogeny. Second, to assess the depositional environment of the potential source rocks, …
Stable Cu, Fe, And Ni Isotopic Systematics Of The Sudbury Offset Dikes And Associated Rocks, Peter Christoffersen
Stable Cu, Fe, And Ni Isotopic Systematics Of The Sudbury Offset Dikes And Associated Rocks, Peter Christoffersen
Electronic Thesis and Dissertation Repository
The stable isotope ratio compositions of Fe, Ni, and Cu (δ56Fe, δ60Ni, and δ65Cu) are reported for the first time in rocks from the Sudbury Igneous Complex (SIC). Massive sulfide ores, Quartz Diorite (QD), Inclusion bearing Quartz Diorite (IQD), and rocks from members of the Main Mass of the SIC were analyzed. The objective was to better understand the origin(s) and source(s) of the Offset Dikes and the associated sulfide mineralization. Based on stable isotope ratios and petrographic observations, two distinct types of sulfide mineralization hosted within the Offset Dikes are identified. Massive sulfide …
Mining In Maine : Past, Present, And Future, Carolyn A. Lepage
Mining In Maine : Past, Present, And Future, Carolyn A. Lepage
Maine Collection
Mining in Maine : Past, Present, and Future
by Carolyn A. Lepage, Michael E. Foley, and Woodrow B. Thompson
Maine Geological Survey, Department of Conservation, Augusta, Me., 1990.
Contents: Introduction / The Early Years: Pre-Civil War / The Civil War to World War II / The War Years of the 1940's / The Postwar Years: 1940's to 1960 / The 1960's / The 1970's / Maine Mineral Resources Association / The 1980's / Current Mining and Exploration / Future Potential / Acknowledgments / References
Tourmaline - A Prospecting Guide For Massive Base-Metal Sulfide Deposits In The Penobscot Bay Area, Maine, John F. Slack
Tourmaline - A Prospecting Guide For Massive Base-Metal Sulfide Deposits In The Penobscot Bay Area, Maine, John F. Slack
Maine Collection
Tourmaline - A Prospecting Guide for Massive Base-Metal Sulfide Deposits in the Penobscot Bay Area, Maine
by John F. Slack, U.S. Geological Survey
Special Economic Studies Series No.8
Maine Geological Survey, Department of Conservation, Augusta, Maine (June, 1980).
Contents: Abstract / Introduction / Geologic Setting / Massive Sulfide Deposits / Tourmaline Occurrences / Tourmaline: A Guide to Ore / Acknowledgements / References Cited
Maine Gems And Gem Minerals, Maine State Museum
Maine Gems And Gem Minerals, Maine State Museum
Maine Collection
Maine Gems and Gem Minerals
The Maine State Museum - Printed under Appropriation No. 1741.1
Sections Include : "An Introduction to the Gemstones of Maine", "Tourmaline", "Beryl", "Quartz Family Gems", "Topaz", "Gold", "Miscellaneous Gem Varieties", "Maine's 'Lost' Gem Mines", "Hamlin Necklace", etc
A Detailed Economic Investigation Of Geochemical And Aeromagnetic Anomalies North Central Maine, W. F. Stickney, R. S. Young, L. A. Wing
A Detailed Economic Investigation Of Geochemical And Aeromagnetic Anomalies North Central Maine, W. F. Stickney, R. S. Young, L. A. Wing
Maine Collection
A Detailed Economic Investigation of Geochemical and Aeromagnetic Anomalies North Central Maine
W.F.Stickney, R.S.Young and L.A.Wing
Special Economic Series No.4, Maine Geological Survey, Department of Economic Development, Augusta, Maine (March 1965).
Contents: Foreword / Part I - Geology (W.F. Stickney) / Part II - Geophysics (R.S. Young) / Part III - Geochemistry (L.A. Wing) / References
Maine Pegmatite Mines And Prospects And Associated Minerals, Maine Geological Survey
Maine Pegmatite Mines And Prospects And Associated Minerals, Maine Geological Survey
Maine Collection
Maine Pegmatite Mines and Prospects and Associated Minerals
Minerals Resources Index No.1 - Maine Geological Survey
Department of Development of Industry and Commerce, Augusta, Maine (March 1, 1957).
Contents: Introduction / Acknowledgments / Explanatory Considerations / Selected Bibliography / Pegmatite Mines and Prospects - Alphabetical Index / Pegmatite Mines and Prospects - County-Township Index / Pegmatite Mines and Prospects - Map Index.
Also Includes: Southwestern Maine - Pegmatite Localities and Access Highways / Index Map Showing Mining Districts and Detailed Plate Locations
Genetic Study Of Some Pyrrhotite Deposits Of Maine And New Brunswick, Dept. Of Development Of Industry And Commerce
Genetic Study Of Some Pyrrhotite Deposits Of Maine And New Brunswick, Dept. Of Development Of Industry And Commerce
Maine Collection
Genetic Study of Some Pyrrhotite Deposits of Maine and New Brunswick
by Robert S. Houston
Maine Geological Survey - Bulletin 7
Department of Development of Industry and Commerce, Augusta, Maine (January, 1956).
Contents: Abstract / Introduction / Field and Laboratory Studies / Regional Geography / Regional Geology / Pyrrhotite Deposits / Description of Individual Deposits / Literature Cited
Report Of The State Geologist 1953-1954, Maine Geological Survey
Report Of The State Geologist 1953-1954, Maine Geological Survey
Maine Collection
Report of the State Geologist 1953-1954.
Maine Geological Survey - Maine Development Commission, Augusta, Maine - July 1955.
Contents: Joseph M. Trefethen -- Review of Maine Mineral Outlook / Henry W. Allen -- Limestone Investigations, 1953-54 / Wm.T. Forsyth -- Airbourne Magnetometer Survey in Eastern Maine / Gary M. Boone -- Petrology of the Farmington, Maine Area / Joseph M. Trefethen, Henry Allen, and Wm. T. Forsyth -- Scheelite Occurrences in Maine / Wm.T. Forsyth -- Beneficiation Tests on the Warren Sillimanite Gneiss / Wm. T. Forsyth -- Pyrrhotite Mineralization at Iron Hill, Gardiner, Maine / Joseph M. Trefethen -- …
Maine Geological Survey - Bulletin 6 : Pegmatites And Associated Rocks In The Newry Hill Area, Oxford County, Maine., Vincent E. Shainin, Louis F. Dellwig
Maine Geological Survey - Bulletin 6 : Pegmatites And Associated Rocks In The Newry Hill Area, Oxford County, Maine., Vincent E. Shainin, Louis F. Dellwig
Maine Collection
Maine Geological Survey - Bulletin 6 : Pegmatites and Associated Rocks in the Newry Hill Area, Oxford County, Maine.
Joseph M. Trefethen, State Geologist.
by Vincent E. Shainin, University of Maine and Louis F. Dellwig, U.S. Geological Survey.
Maine Development Commission, Augusta, Maine, 1955
Report Of The State Geologist 1951-1952, Maine Geological Survey
Report Of The State Geologist 1951-1952, Maine Geological Survey
Maine Collection
Report of the State Geologist 1951-1952.
Maine Geological Survey - Maine Development Commission, Augusta, Maine - December, 1953.
Contents: Joseph M. Trefethen -- New England Mineral Resources / Henry Allen -- Progress Report of Limestone Survey, Knox County / Wm. Forsyth -- Mineralogical Variations of the Ellsworth Schist in Blue Hill, Maine / Lawrence A. Wing -- Preliminary Report on Eastern Maine Granites / Kern Jackson -- A Preliminary Report on the Geology of a Portion of the Rumford Quadrangle, Maine / Robert M. Zink -- Certain Aspects of the Ecology of Venus and Mya at Bunganuc and at Morgan …
Report Of The State Geologist 1947-1948, Maine Geological Survey
Report Of The State Geologist 1947-1948, Maine Geological Survey
Maine Collection
Report of the State Geologist 1947-1948.
Maine Geological Survey - Maine Development Commission, Augusta, Maine - March 1949.
Contents: Activity of the Maine Geological Survey, 1947-48 / Joseph M. Trefethen -- Review of the Aroostook County Manganese Deposits / Joseph M. Trefethen -- Notes on Ground Water Conditions in Maine / Joseph M. Trefethen -- The Desert of Maine / Henry Allen and Elbert Pratt -- Reconnaissance Surveys of Limestones in Franklin County, Maine / Lawrence Wing and Arthur Dawson -- Preliminary Report on Asbestos and Associated Rocks of Northwestern Maine / Lawrence Goldthwait -- Clay Survey 1948 / Earl …
Maine Geological Survey - Bulletin 4 : Manganese Deposits Of Aroostook County, Maine., Ralph L. Miller
Maine Geological Survey - Bulletin 4 : Manganese Deposits Of Aroostook County, Maine., Ralph L. Miller
Maine Collection
Maine Geological Survey - Bulletin 4 : Manganese Deposits of Aroostook County, Maine.
Joseph M. Trefethen, State Geologist
by Ralph L. Miller
Prepared in cooperation with the Geological Survey of the United States Department of the Interior. State Geologist and Maine Development Commission, Augusta, Maine, April 1, 1947.
Contents: Abstract / Introduction / General Geology / Economic Geology / Descriptions of Deposits /
Some Ore Deposits In Maine And The Milan Mine, New Hampshire, William H. Emmons
Some Ore Deposits In Maine And The Milan Mine, New Hampshire, William H. Emmons
Maine Collection
Some Ore Deposits in Maine and The Milan Mine, New Hampshire
by William H. Emmons
Department of the Interior, United States Geological Survey - Bulletin 432
Washington, D.C. (1910).
Contents: Introduction / Geology / Ore Deposits / Descriptions of Mines / Mines of Hancock County / Mines of Washington County / Mines in Somerset and Oxford Counties / Milan Mine, New Hampshire / Index