Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Economic geology"”.
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ECONOMIC GEOLOGY OF THE SAN BERNARDINO MOUNTAINS, CALIFORNIA
… new, current, and historical data of the major economic resources that are present and mining that has gone on in the San Bernardino Mountains. It is estimated that historical mining of the Holcomb Valley recovered $457,660,000 of gold or about 350,000 troy ounces based on samples collected for …
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Economic geology of the refractory clays in the Union of South Africa with particular reference to the Transvaal deposits
The purpose of this thesis is to describe the occurrence, nature, properties, and utilization of the refractory clays in South Africa with particular reference to the Transvaal deposits, focusing on those characteristics which may be of direct value in the future development of this important …
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The geology of China
… Chapter III Geo-morphology. SECTION II. General geology. CHAPTER IV Stratigraphy. Introductory. Pre-cambrian. Cambrian-middle ordovician. Silurian-devonian. Carboniferous-permian. Triassic-jurassic. Post jurassic. Chapter V Igneous rocks in China. Chapter VI General geological structure of China. …
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The Sukulu complex, Eastern Uganda and The origin of the African carbonatites
… paper deals with the structure, petrography and economic geology of the Sukulu Complex. Structural Geology: The mapping of the Sukulu-Tororo complex provided the first detailed examination of the structure of an African carbonatite. The most important result of this survey was the demonstration …
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Geochemical Constraints of Porphyry Cu Deposits-Forming Magmas in Sonora, Mexico
… (PCDs) represent the most significant source of economic-grade copper (Cu) on Earth (Sillitoe, 2010). PCD formation is intimately linked to the magmatic and tectonic evolution of convergent margins (Sillitoe, 2010). While the metallogenic characteristics of PCDs have been well-studied, the …
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Three-dimensional seismic interpretations of Miocene strata in Vermilion and South Marsh Island areas, Gulf of Mexico
… Previous work on this area by the Bureau of Economic Geology has produced a sequence stratigraphic framework and detailed structural analysis of the upper 3.0 seconds of strata within this seismic survey. Using this work as a frame of reference, we analyze regions in the lower 3.0 seconds of …
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Mantle conditions and kimberlite geochemical criteria controlling diamond survival in Kimberlites
… and to assess the potential diamond grade for economic geology of kimberlite deposits. However, a thorough understanding of variations in diamond grade and survival or preservation conditions in the Lunda province (LP) has not yet been developed. Here a diamond preservation index model has been …
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Trace Element Geochemistry of Volcanogenic Massive Sulfide Deposits in Archean Greenstone Belts: Implications for Metal Endowment and Geodynamic Settings
The Neoarchean greenstone belts of the Canadian Superior Province host world-class Au and base metal (Cu-Zn-Pb) massive sulfide deposits with distinct geological features, including a wide range of different host rocks and crustal settings. The range of settings is reflected in the trace metal …
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Petrogenesis of Eocene-Oligocene magmatism of the Sulphur Springs Range, central Nevada: The role of magma mixing
Widespread base- and precious-metal anomalies, altered porphyry intrusions and oxidized veins occur in a portion of the Sulphur Springs Range, Nevada (adjacent to the Au-producing Carlin Trend). Some of the Eocene-Oligocene intrusions and cogenetic volcanic rocks in the range exhibit evidence of …
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Studio di un modello di correlazione tra la fluttuazione del tenore di metalli pesanti e di altri fattori ambientali e la salute umana in Sardegna
… exploitation was one of the most important economic activities in Sardinia during the past centuries and a lot of data are today available for the researchers. For this reasons Sardinia is an ideal setting to study a possible correlation between environmental factors and the diseases above, …
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Spatial and Temporal Relationships between Carlin-style Gold and Polymetallic Mineralization at the Deep Cove Gold-Silver Deposit, Lander County, Nevada
Cove is a late Eocene previously mined Au-Ag deposit in the Battle Mountain district of Lander County, Nevada that contains both Carlin-style and polymetallic mineralization. It has been interpreted as a distal disseminated deposit approximately 1.6 km northeast of the Eocene McCoy Au skarn deposit …
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Paragenetic Evolution of the Robertson Deposit: Eocene Intrusion Related Gold Deposit in the Northern Shoshone Range, Nevada
The Robertson deposit, formerly known as Tenabo, is an Eocene intrusion-related gold deposit 5 km north of Pipeline, which is a 20 Moz+ Carlin-type gold deposit in the northern Shoshone Range, Nevada. Carlin-type gold deposits have been the focus of many studies as they represent the second largest …