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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 20 of 47 for “"Halite"”.
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Ancient Triassic Halite as a novel source of antibiotic chemical diversity
This thesis aimed to establish the potential of extremely halophilic microorganisms, isolated from Kilroot Salt Mine, as a reservoir of unexplored natural product chemistry with antimicrobial activity against the clinically relevant ESKAPE pathogens. The capacity of haloarchaea to modulate …
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Changes in archaeal and bacterial community composition following entombment in halite crystals
… brines are preferentially entombed inside halite brine inclusions. This involved direct comparison of microbial communities (Archaea and Bacteria) in in-situ brine and halite samples collected from Trapani Salterns in Sicily, as well as, comparison between parent brines and …
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Experimental studies of pressure solution and crack healing in halite and calcite
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1989.
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Distribution of bromine in bedded halite in the Green River Formation, southwestern Wyoming
Includes bibliographical references.
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Effect of halite and calcite coatings on thermal infrared spectra wih implications for Mars exploration
… and texture on the TIR reflectance spectra of halite- and calcite-coated glasses. We evaluated salt coating textures that could occur on Mars: 1) continuous, uniformly thick layers of salt without exposed substrate; 2) discontinuous particulate salt coatings with variable thickness and exposed …
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Effect of halite (NaCl) on sandstone permeability and well injectivity during CO2 storage in saline aquifers
… as a result salt precipitation in the form of halite (NaCl). The focus was on one of the important physical mechanisms of CO2 injection into deep saline aquifers. The salt (mainly halite) will eventually fully saturate the brine causing the salt to start precipitating as solids. This solid …
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Chlorine in ground water : stable isotope distribution
… isotope composition of chloride from sea water halite, hydrothermal water samples and ground-water samples where chloride was likely moving by diffusion. The measurement method was mass spectrometry of methyl chloride gas prepared by quantitative precipitation of AgC1 from solution, and reaction …
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Geochemical Evidence for Vertical Migration of Deep Formation Fluids through the Baton Rouge -Denham Springs Fault System
… formation fluids from dissolved recrystallized halite. Deep formation fluids have interacted with Louann Salt diapirs underlying the BRAS area, dissolving halite, and are shown to have moved up fault planes and entered shallow aquifers to mix with the <em>in situ</em> groundwaters.</p>
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Depositional environments and diagenesis, Winnipegosis Formation (Middle Devonian), Williston Basin, North Dakota
… (dolostone and anhydrite) and Fourth (Prairie; halite) Episodes were restricted to the initially deep, inter-reef basin, filling it to the level of the top of the pinnacle reefs. In this evaporite basin, there was increase in salinity and decrease in water depth due to evaporative drawdown. Beds …
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Role of fluids in geological processes
… on trace element ratios in fluid inclusions in halite from the Polish Zechstein Basin" describes application of a new redox proxy for paleo-seawater that involves analysis of redox-sensitive trace elements (e.g., Fe, Mn, U, V, Mo) in ancient seawater trapped as fluid inclusions in halite. …
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Experimental study of the effect of H2O-CO2-NaCl fluid immiscibility on the reaction calcite + quartz + rutile = sphene + CO2 at 2 KBAR
… by coexisting CO₂ vapor-rich and aqueous, halite-bearing inclusions. Results from 450-520 °C are listed below.
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Geochemical Characterization of the Louann Salt, Puma Field, Green Canyon, Gulf of Mexico Basin – Using XRF and XRD
… traps. The Louann Salt is composed primarily of halite with intercalated anhydrites and silty or sandy-halite intervals, with overall thicknesses in excess of four kilometers (~13,000 feet). Suture zones occur intermittently within the Louann Salt, formed by the collision of allochthonous …
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The geology and hydrocarbon potential of the Dawson Bay Formation carbonate unit (Middle Devonian), Williston Basin, North Dakota
… neomorphism; pressure-solution; fracturing; halite cementation; and hydrocarbon emplacement.</p> <p>Late mesogenetic hydrocarbon generation occurred within basal Dawson Bay carbonates and/or was the result of migration into the formation. Middle to late mesogenetic anhydrite, halite, and …
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Elastic properties of salt: laboratory measurements, well-log analysis, and a seismic survey over the Hockley Salt Mine, Texas
… on salt samples from various locations. The pure halite crystals from the Goderich salt mine, Canada, demonstrate shear-wave splitting and compressional-wave variations which indicate cubic anisotropy. The stiffness values calculated for that are C_11=48.7 GPa, C_44=13.1 GPa , and C_12=11.9 GPa. …
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Fluid Inclusion Characteristics in Magmatic-Hydrothermal Ore Deposits
… fluid inclusions contain liquid, vapor, and halite at room temperature, and are common in magmatic-hydrothermal ore deposits. These inclusions homogenize in one of three ways: A) halite disappearance (Tmhalite) followed by liquid-vapor homogenization (ThL-V), B) simultaneous ThL-V and …
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Sodium metasomatism and magnesio-riebeckite mineralization in the Wilson Ridge pluton
… amphibole contain daughter crystals of halite and up to three other unknown crystals. Oxygen isotope studies suggest that granitoid rocks containing hydrothermal amphiboles have lower delta18O values (+3.68‰ to +6.97‰) than unaltered granitoid rocks (delta 18O values …
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IDENTIFYING SALT SUTURE ZONES AND LITHOLOGICAL CHANGES OF THE LOUANN SALT IN THE GULF OF MEXICO BASIN, LA. U.S.A.
… Results show the salt primarily consists of halite, with minor anhydrite, gypsum, and sylvite, indicating continuous precipitation. Geochemical analysis identifies localized anhydrite zones, suggesting fluctuating brine chemistry, while quartz and clay minerals point to siliciclastic influx. …
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The formation and origin of carbonate minerals in the Darling and Yzerfontein hypersaline pans, Western Cape, South Africa
… Yzerfontein pan. Directly below the surficial halite crust of the three brine-type pans is a black organic-matter rich layer in which bacterial sulphate reduction is occurring (hydrogen-sulphide smell). All of the pans contain disseminated calcite, with only the Zwartwater North and Zwartwater …
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Geochemistry, stable isotopes and fluid inclusion studies of the Otjikoto gold deposit, Central Namibia
… 44.5 wt. % NaCl eq. in aqueous inclusions with halite crystals and from 0.9 to 22.9 wt. % NaCl eq. in inclusions without halite crystals. The total homogenisation temperatures, Th tot (L), ranged from 151 to 488 °C in the aqueous-carbonic inclusions and from 156 to 444 °C in the aqueous …
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The hydrochemical and isotopic characterization of groundwater in southern Mozambique
… types. Saturation indices of calcite, dolomite, halite, and gypsum. Saturation indices were calculated using the thermodynamic software PHREEQC. All samples were undersaturated with respect to gypsum and halite, suggesting that the conditions were thermodynamically favored for their dissolution. …
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