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Showing 1 to 18 of 18 for “"Microthermometry"”.
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Detection limits of CO₂in fluid inclusions using microthermometry and Raman spectroscopy and the spectroscopic characterization of CO₂
… the CO₂ minimum detection limits (MDLs) using microthermometry and laser Raman spectroscopy are established in terms of P<sub>CO₂</sub> using synthetic H₂O-CO₂ inclusions. The purpose of the microthermometric experiments was to examine the diagnostic CO₂ phase changes and determine the quantity …
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Silicification across the Betze-Post Carlin-type gold deposit: Clues to ore fluid properties and sources, Northern Carlin Trend, Nevada
… exhibit CL-bright and CL-multiple luminescence. Microthermometry indicates ore stage fluids have low salinities and were trapped between 180°C and 240°C. deltaDH2O and delta 18O values in ore fluids and quartz, respectively, indicate that ore stage fluids were highly evolved but were …
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PVTX and Raman Spectral Properties of Fluids at Elevated Pressures and Temperatures
… the study of fluids, including fluid inclusion microthermometry and Raman spectroscopy. Microthermometry is the heating/cooling of fluid inclusions to observe and record temperatures of phase changes which, in turn, are used to determine properties such as salinity (based on the freezing point …
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Application of fluid inclusions in geological thermometry
… and relatively constant temperature. However, microthermometry of synthetic fluid inclusions often reveals Th variations of about ± 1- 4 degrees Centigrade, or one order of magnitude larger than the precision of the measurement for an individual inclusion. The same range in Th was observed in …
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Geochemical fingerprinting of carbonate wall rock alteration at major base metal sulphide deposits in the Otavi Mountain Land, Namibia
… stable isotope techniques, and fluid inclusion microthermometry were employed (i) to differentiate between carbonate generations associated with the alteration and mineralisation, particularly for the more economic Tsumeb-type deposits, represented by Tsumeb and Kombat, as well as in comparing …
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Fluid flow and deformation history of the Denver basin, CO region: fluid inclusions, U-Pb geochronology and isotope geochemistry of calcite-filled fracture cements in the Niobrara Formation
… LA-ICP-MS U-Pb geochronology, fluid inclusion microthermometry, stable isotope, and strontium isotope analysis. Samples were obtained from the Albert Kurtz well in the Wattenberg field, CO. Results obtained from several fracture fill types (e.g., crack-seal-slip, crack-seal and crack fill …
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Metamorphism in the Northern Front Range, Colorado
… microprobe analysis, and fluid inclusion microthermometry were used to quantify the history of a high grade Proterozoic terrane exposed within the northeastern Colorado Front Range. Pressure-temperature calculations identified two blocks from different crustal levels exposed adjacent to …
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Experimental Study of the PVTX Properties of the System H₂O-CH₄
… system. The combined synthetic fluid inclusion, microthermometry and Raman spectroscopy method is a novel experimental approach to determine the P-T stability conditions of methane hydrates. The method is fast compared to conventional methods, and has the potential to be applied to study other …
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Experimental Study of the PVTX Properties in Part of the Ternary System H₂O-NaCl-CO₂
… technique in conjunction with conventional microthermometry, a hydrothermal diamond-anvil cell and Raman spectroscopy. At constant salinity, the high-pressure portion of the solvus migrates to higher pressures and temperatures with increasing carbon dioxide concentration. Immiscibility is …
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The magmatic-hydrothermal fluid history of the Harrison Pass Pluton, Ruby Mountains, NV: implications for the Ruby Mountains-East Humboldt Range metamorphic core complex and Carlin-type Au deposits
… coupled with data from fluid inclusion microthermometry, LA-ICP-MS fluid inclusion geochemistry, and oxygen stable isotopes from magmatic and hydrothermal quartz, demonstrate that two-stage intrusive assembly was paralleled by a two-stage magmatic-hydrothermal fluid system. Early stage …
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Structural controls and diagenetic conditions associated with fluid migration on the Moab Fault, UT
… clumped isotope thermometry with fluid inclusion microthermometry, a complementary thermometry method, a new approach is developed to aid in interpreting temperature measurements from carbonate veins. Expected relationships between these two methods allow a researcher to identify whether a …
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Graphite-bearing and graphite-depleted basement rocks in the Dufferin Lake Zone, south-central Athabasca Basin, Saskatchewan
… in different quartz vein generations using microthermometry and Raman analysis, provide an indication of the fluids that have interacted with these rocks. Monophase vapor are the dominant type of fluid inclusions in the VGPS, whereas aqueous two-phase (L+V) and three-phase (L+V+Halite) FI …
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Fluid evolution and mineralising potential in the outer margin of the southern Gariep Belt
… of the belt have been further constrained, using microthermometry results in conjunction with mineral assemblages, to 2.9-3.6 kbar, 2.9-3.1 kbar and 1.8-3.1 kbar for the northern, central and Vanrhynsdorp areas, respectively. Field observations and fluid inclusion analyses suggest channeled fluid …
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Physical and chemical aspects of fluid evolution in hydrothermal ore systems
… Mexico, has been traced using fluid inclusion microthermometry. The lack of cogenetic liquid- and vapor-rich inclusions, plus final homogenization of most saline, liquid-rich inclusions by halite dissolution indicate that high-salinity fluids were generated by a mechanism other than fluid …
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Paleofluid Flow, Fracturing and Reservoir Implications in Foreland basins: an example from the Cretaceous Qamchuqa Formation, Kurdistan Iraq
… 87Sr/86Sr ratios. The primary fluid inclusion microthermometry of pervasive and saddle dolomites reveal saline and moderate to high homogenization temperatures. Pervasive dolomites moderately display comparable saddle dolomite REE patterns, light REE (LREE) enrichment, and moderate to low …
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The Nature of Fluids in Hydrothermal Copper and Molybdenum Ore Deposits - An experimental and analytical study
… natural fluid inclusions by optical microscopy, microthermometry, Raman spectroscopy, and LA-ICP-MS. The partitioning of Cu between vapor and brine in aqueous NaCl-S ± KCl ± FeCl2-rich fluids was investigated by means of hydrothermal experiments in rapid quench autoclaves at 600-800°C, 70-130 MPa …
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Geology of Sub-Salt Carbonate Rocks in the Rozhkovsky Structure, Northern Precaspian Basin, Kazakhstan: Implications for the Formation of Carbonate Reservoir in a Relatively Closed Diagenetic System
… elevated burial temperatures. A fluid inclusions microthermometry study shows the average Th from syntaxial calcite cements is 90°C and that the salinities range from 20 to 24 wt% NaCl. The syntaxial calcite is therefore interpreted to be formed during burial diagenesis rather than the common …
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Large-scale hydrothermal dolomitisation in the southwestern Cantabrian Zone (NW Spain) : causes and controls of the process and origin of the dolomitising fluids
… and fluid inclusion study, comprising microthermometry, Raman spectroscopy and crush-leach analyses. The precursor carbonates underwent burial and deformation prior to dolomitisation, resulting in the development of bedding parallel stylolites and calcite veins. The dolomitisation …