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.
Results
Showing 1 to 20 of 21 for “"SKARN"”.
-
Geology of copper-gold bearing skarn, Caribou Mountain, Idaho
Includes bibliographical references.
-
In Situ Hydrogen Measurements in Garnet
… valuable elements including W and Fe in skarn systems. In situ measurements of water concentration and H isotopes in garnet can be used to understand the movement of fluids and the development of skarn systems. In situ δD measurements require a matrix-matched garnet reference material, …
-
Geología, mineralogía, evolución y modelo genético del yacimiento de au-cu de "El Valle-Boinás" Belmonte (Asturias)
… rocas pelíticas y a una mineralización de tipo skarn en el encajante carbonatado. Se han definido dos tipos de skarn: un skarn magnésico formado sobre el miembro inferior dolomítico, rico en materia orgánica, de la Formación Láncara, y uno cálcico formado preferentemente sobre el miembro …
-
Patterns of distal alteration zonation around Antamina Cu-Zn skarn and Uchucchacua Ag-base metal vein deposits, Peru : mineralogical, chemical and isotopic evidence for fluid composition, and infiltration, and implications for mineral exploration
… base metal production that includes: Cu-Zn skarn, Zn-Pb-Ag carbonate replacement and Ag-base metal deposits. These deposits are located in multiple geological settings and are commonly associated with low-grade Cu-Mo calc-alkaline porphyry districts. Visible alteration halos to these …
-
Halogen-element (F, Cl, and Br) behaviour in apatites, scapolite, and sodalite : an experimental investigation with field applications
… and 36 scapolite samples from the Tieshan Fe-Cu skarn deposit (China), the Nickel Plate gold deposit (British Columbia), and the Grenville pegmatite/skarn/vein deposits (Ontario and Quebec) have been analyzed by electron microprobe (EMPA) and X-ray fluorescence microprobe (XRF). Twenty six …
-
Alcance de las técnicas mineralógicas para el estudio de especiación y movilización de metales y metaloides en suelos contaminados.
… diferentes de yacimientos minerales (greisen, skarn e hidrotermal). El estudio comparativo entre los tres casos permite realizar algunas deducciones relacionadas con el papel que juegan las rocas de caja y las texturas minerales en la dispersión de los contaminantes. Los otros dos …
-
Time-Space Relationships between Sediment-Hosted Gold Mineralization and Intrusion-Related Polymetallic Mineralization at Kinsley Mountain, NV
… in Nevada. SHGDs, intrusion-related tungsten skarn, and polymetallic carbonate replacement vein deposits have been mined from Kinsley Mountain, proximal to an Eocene intrusive center. Stratigraphically and structurally controlled SHGDs occur as replacement bodies in Cambrian shelf carbonates …
-
Boron metasomatism in the Alta stock contact aureole, Utah
… additions and depletions in igneous, replacement skarn, and carbonate whole-rock samples. Of the major and trace elements studied, boron proved to be the most interesting tracer of fluid, due in part to extensive borate mineralization (ludwigite and kotoite) in carbonates near the stock contact, …
-
Quantifying Crustal Assimilation in Historical to Recent (1329-2005) Lavas at Mt. Etna, Italy: Insights from Thermodynamic Modeling
… are reproduced via stoping and assimilation of skarn and flysch, which compose the uppermost 10-15 km of sedimentary substrata beneath the volcanic pile. Specifically, K<sub>2</sub>O and Rb behave incompatibly in skarn/flysch wallrock melts, and elevated <sup>87</sup>Sr/<sup>86</sup>Sr in the …
-
Spatial and Temporal Relationships between Carlin-style Gold and Polymetallic Mineralization at the Deep Cove Gold-Silver Deposit, Lander County, Nevada
… 1.6 km northeast of the Eocene McCoy Au skarn deposit and adjacent late Eocene quartz monzonite Brown stock. Previous geologic mapping, stable isotope data, and geochronology have suggested the mineralization at Cove is genetically associated with an Eocene magmatic-hydrothermal system …
-
Characterization of the CRM occurrences in ore deposits of Sardinia
… a focus on a specific class of deposit named “skarns”. In the last decades concerns have increased about the supply for specific elements and minerals, essential to high-end industrial applications and for the green-technologies transition. Starting from 2017, and updated to 2020, the European …
-
Geology of the Alice E. breccia pipe and vicinity, New World mining district, Park County, Montana
… the study area. Propylitic, phyllic, and hydrous skarn alteration all occur in the breccia pipe and the rocks in the vicinity of the pipe. The alteration is zoned vertically and laterally about the breccia. Supergene alteration has resulted from the oxidation of pyritic ores enriching gold …
-
A study of the crystal chemistry, cathodoluminescence, geochemistry and oxygen isotopes in Scheelite: application towards discriminating among differing ore-deposit systems
… (orogenic, sediment- and greenstone-hosted, skarn, porphyry, greisen, volcanogenic massive sulfide, breccia and polymetallic deposits) were examined using cathodoluminescence, SEMEDS, LA-ICP-MS and whole-grain stable isotopic analyses. The goal of this study was to assess whether the …
-
Evaluación de recursos recuperables basada en métodos multivariables
… información de un yacimiento mineral de tipo Skarn. La data disponible permitirá primero realizar un estudio exploratorio de datos para validar la calidad de la información antes de la estimación, luego se realizará un análisis de frontera entre las litologías presentes en el yacimiento. Las …
-
The geochemistry of carbonate-hosted Pb-Zn-Ag mineralization in the Lavrion District, Attica, Greece: fluid inclusion, stable isotope, and rare earth element studies
… and is spatially associated with a Cu-Fe skarn. Carbonate-replacement deposits occur predominantly in marbles (Upper and Lower marble of the Basal Unit), Kaesariani schists, and along a major detachment fault. Orebodies are mainly manto-style, but mineralization also occurs in veins. The …
-
Petrography and Field Mapping of Eocene Intrusions and Adjacent Breccia Zones at the Scraper Springs Prospect, Elko County, Nevada
… hosted in volcanics, and polymetallic Au-bearing skarn mineralization hosted in Paleozoic sedimentary rocks in contact with the diorite intrusion. The present study employs field mapping techniques to document the geology and alteration of the diorite intrusion and adjacent silicified/advanced …
-
Geodynamic Evolution of the Aegean Back-arc and its Implication for Associated Precious and Base Metal Mineralization
… intermediate-sulfidation epithermal, and skarn deposits tapped different sources of metals and fluids along the major low-angle detachment systems and steep normal faults. This study links the regional metallogenic diversity to fluid and crustal sources, within a framework of the evolving …
-
ECONOMIC GEOLOGY OF THE SAN BERNARDINO MOUNTAINS, CALIFORNIA
… San Bernardino Mountains are well known for skarn gold deposits. New work indicates that the placer gold from Holcomb Valley is often of very high purity. Placer gold samples were analyzed using the scanning electron microscope and energy dispersive x-ray spectra to determine the purity of …
-
The igneous petrology, thermal history, and genesis of sedimentary rock-hosted Au deposits in the northern Battle Mountain mining district, Nevada
… origin, including porphyry, skarn, and distal disseminated deposits, as well as sedimentary-rock hosted Au deposits of uncertain origin. This dissertation examines the ages of magmatism and mineralization in the Battle Mountain mining district, the characteristics of hypogene …
-
Emerging stable isotope techniques in hydrothermal research: new methods applied to carbonates and hydrous minerals in ore deposits and geothermal fields
… subsequently applied in epithermal (Waihi, NZ), skarn (Antamina, Peru), and carbonate-hosted (Mount Isa, Australia) metal deposits. Results highlight the potential for clumped isotopes to delineate the heat footprint around mineral deposits that contain carbonates. Further refinement of the …
Page 1 of 2