Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Entire DC Network
Characterization Of Pyrite From Gold Deposits, Peter John Maclean
Characterization Of Pyrite From Gold Deposits, Peter John Maclean
Digitized Theses
Pyrite associated with gold deposits has been characterized on the basis of morphology, optical and chemical microstructures, and minor and trace element geochemistry. Gold deposits studied include: Agnico-Eagle mine (Quebec), Fairview mine (South Africa), Bousquet mine (Quebec), Williams mine (Ontario), Dome mine (Ontario), Pistol Lake prospect (Northwest Territories), Freddies Consolidated mine (South Africa), Pilgrim's Rest Gold Field (South Africa), and Clontibret prospect (Ireland). Pyrite from Buchans (Newfoundland), Kosaka (Japan), Axial Seamount and Explorer Ridge volcanogenic massive sulphide bodies are included in the study. Colour-staining of polished surfaces of pyrite with a potassium permanganate solution enhances internal microstructures and facilitates detailed …
Petrogenesis Of The Prairie Creek, Arkansas, Diamondiferous Olivine Lamproite, Edward C. Walker
Petrogenesis Of The Prairie Creek, Arkansas, Diamondiferous Olivine Lamproite, Edward C. Walker
Digitized Theses
The Prairie Creek, Arkansas olivine lamproite intrusion consists of three facies of rock: tuff, breccia and hypabyssal facies of rock; and two suites of cognate xenoliths. Suprasolidus experiments on the hypabyssal rock were undertaken between 10 and 40 kilobars, and 1000 and 1400{dollar}\sp\circ{dollar}C, with three different volatile conditions. A petrogenetic model for the intrusion is proposed based on the integration of phase relations and mineral chemistry.;Clinopyroxene, phlogopite, spinel and titan potassic richterite mineral analyses from the intrusion independently define a single continuous compositional trend. Comparison of the mineral analyses from the intrusion to those from the experiments suggests that the …
The Sedimentology Of The Boss Point Formation (Pennsylvanian), Eastern New Brunswick And Northern Nova Scotia (Volumes I And Ii), Gregory Hawtrey Browne
The Sedimentology Of The Boss Point Formation (Pennsylvanian), Eastern New Brunswick And Northern Nova Scotia (Volumes I And Ii), Gregory Hawtrey Browne
Digitized Theses
The Westphalian A (Pennsylvanian) Boss Point Formation consists of sandstone and mudrock units which developed within an active pull-apart basin (the Cumberland subbasin) in Maritime Canada. The bulk of the formation comprises trough cross-bedded sandstones interpreted as braided river deposits. The rivers flowed from largely felsic igneous provenance areas in the west, toward the region of the present-day Bay of Fundy. Paleocurrents indicate a dominant northeast-directed drainage system, which deviated toward the southeast in the vicinity of Cape Maringouin, about a paleogeographic high related to the penecontemporaneous Harvey-Hopewell Fault.;Intercalated with the sand-dominated fluvial rocks, are fine-grained sandstones, ostracod-bearing limestones and …
Stratigraphy, Sedimentology And Tectonic Setting Of The Upper Shaler Group, Victoria Island, Northwest Territories, Robert H. Rainbird
Stratigraphy, Sedimentology And Tectonic Setting Of The Upper Shaler Group, Victoria Island, Northwest Territories, Robert H. Rainbird
Digitized Theses
The stratigraphy and sedimentology of the uppermost late Proterozoic Shaler Group (Kilian and Kuujjua formations) in the Minto Inlier, Victoria Island, was investigated in order to better understand conditions of deposition and to place these strata in a regional tectonic context so that they might be compared with models developed for similar strata in adjacent and formerly adjacent areas.;Detailed stratigraphic section measurement, regional correlation and lithofacies analysis reveals that much of the upper Shaler Group was deposited on a tectonically stable, low gradient, shallow marine platform, perhaps within a passive margin or intracratonic seaway (Amundsen-Mackenzie Basin or Embayment). Subtidal to …
The Stratigraphy And Sedimentology Of The Upper Cretaceous Cardium Formation In Northwestern Alberta And Adjacent British Columbia (Volumes I And Ii), Bruce Samuel Hart
The Stratigraphy And Sedimentology Of The Upper Cretaceous Cardium Formation In Northwestern Alberta And Adjacent British Columbia (Volumes I And Ii), Bruce Samuel Hart
Digitized Theses
The Upper Cretaceous Cardium Formation developed along the western margin of the Western Interior Seaway. The cyclic sedimentation style represented in the formation (consisting of a hierarchial array of shallowing upward cycles capped by transgression surfaces) developed in response to regressions and transgressions occurring on differing temporal scales. Shoreline progradation was generally to the northeast. The two main packages probably developed in response to eustatic third order sea level falls in the mid-Turonian and lower Coniacian. Superimposed on those cycles were fourth order relative sea level fluctuations (each cycle of about 10{dollar}\sp5{dollar} years duration) which were responsible for the development …