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Showing 1 to 13 of 13 for “"Pyrites"”.
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The combustion of pyrites in a Herreshoff furnace
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1929.
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A study of the roasting of pyrites ore in a Herreshoff Furnace
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1928.
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Pyrite geochemistry across the Betze-Post deposit, northern Carlin Trend, Nevada
… ore stage fluid flow. For example, ore stage pyrites occur within brecciated rocks and small-scale fractures within the Wispy Member of the Popovich Formation. Ore stage pyrites have trace element signatures that suggest that the fluid was evolving both temporally and spatially. The associated …
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Stabilisation of sulphide rich soil: problems and solutions
… on various engineering properties of a sulphide (pyrites) rich, naturally occurring clay - Lower Oxford Clay (LOC) - were studied. Experimental tests representing, or relating to, tests outlined in the Design and Construction of Lime Stabilised Capping Specification (DoT, 1995) were utilised and …
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Sulfur, carbon, and oxygen isotopes of coexisting sulfides and carbonates in gas and oil seeps from the Gulf of Mexico
… Fe-oxides reported in association with pyrites at GC-140, GC-185, and GC-272, could potentially influence fractionation of sulfur isotopes during microbial processes by promoting greater sulfur recycling and thus muting fractionation effects. The results of this study offer important …
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Strain in Ordovician and Devonian shales from the Massanutten Synclinorium: implications for fold development and tectonic history
… chlorite pressure fringes on framboidal pyrites record strain in Ordovician and Devonian shales from the Massanutten synclinorium. Total strains display no systematic relation to minor or major structures. Strain histories are related to the development of minor, rather than regional, …
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Pyrite porphyroblast paragenesis at the Cherokee Mine, Ducktown, Tennessee
… pyrrhotite shortly after deposition. The early pyrites were later deformed and acted as seeds for the formation of the larger porphyroblasts by Ostwald ripening, and by the annealing of small pyrite grains into larger porphyroblasts, during isochemical metamorphism. Sphalerite geobarometry …
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The colonisation by vegetation of colliery spoil heaps in the Forest of Dean, Gloucestershire, and implications for biodiversity management
… plot. Floristic and environmental data (pH, pyrites content, slope factor and aspect, canopy cover and plant vigour) were collected from 8 plots ranging 0-100 years since disturbance. Correlation analysis was used to identify potential relationships between the vegetation and environmental …
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Integrative Bioassessment of Acid Mine Drainage Impacts on the Upper Powell River Watershed, Southwestern Virginia
… of minerals containing reduced forms of sulfur (pyrites, sulfides) upon exposure to water and oxygen, is an environmental problem associated with abandoned mined lands (AML). Numerous studies have documented the impacts of AMD upon aquatic communities within acidified stream reaches; these …
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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
… and lacks well-defined rims whereas the arsenian pyrites in the CSD zone are fine-grained, often euhedral to subhedral, and display well defined As- (Ag-)bearing rims. Ag was first detected in Carlin-style pyrite rims at the CSD zone using energy dispersive spectroscopy (EDS) on a scanning …
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The role of sulfur in salt marsh metabolism
The rate of sulfate reduction in stands of dwarf Spartina alterniflora in the Great Sippewissett Salt Marsh is approximately 75 moles S04 m2 year-1. This is the highest rate reported for any natural ecosystem. Sulfate reduction is the most important form of respiration in the marsh and results in …