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Showing 1 to 20 of 56 for “"Meteoric water"”.
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Topographic reconstructions of the Variscan Belt of Western Europe through the study of fossil hydrothermal systems
… late-Carboniferous hydrogen isotope ratios of meteoric water in the internal zones in the Armorican Massif (AM) and the French Massif Central (FMC) with age-equivalent precipitation records in the foreland Bourbon l’Archambault basin (BA) and the Montagne Noire (MN). Combined microstructural, …
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Isotopic Fingerprinting of Shallow and Deep Groundwaters in Southwestern Ontario and its Applications to Abandoned Well Remediation
… Ontario can act as conduits for Sulphur water, brines, and hydrocarbons from deep Paleozoic bedrock aquifers. Such leakage may pose a threat to shallow groundwater and the environment. Cost-effective plugging of these wells requires knowledge of the sources of the leaking fluids. This …
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Investigating Telogenetic Karst Aquifer Processes and Evolution in South-Central Kentucky, U.S., Using High-Resolution Storm Hydrology and Geochemistry Monitoring
… These dataloggers recorded spring discharge, water temperature, specific conductance (SpC), and pH at ten-minute intervals from January to November, 2013. During the year, data for 34 storm events were captured, including water samples that were analyzed for major cation/anion concentrations. …
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Geochemistry of a volcanic hydrothermal system at Mount Spurr, Alaska
… soil sampling, exploration drilling, and water sampling. Aqueous and mineralogical geochemical investigations at a field area on the south flank of Mt. Spurr focus on the possible extent of the hydrothermal system, its temperature at depth, the origin of waters, and location fluid pathways …
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The oxygen isotope composition of the country rock of the Koegel Fontein igneous complex
… -4 ‰ requires a combination of high temperature water-rock interaction, a high water-rock ratio and very low δ18O values in the alteration fluid. Deformation in the BFSZ coincides with the Pan-African Orogeny and a 549-545 Ma global glaciation, and it is reasonable to assume that ambient meteoric …
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Geochemical and isotopic variations in surface waters of the monongahela river basin: An area of accelerating marcellus shale development in West Virginia
Water samples were collected from fifty streams in the Monongahela River basin of West Virginia at baseflow condition. The study area was divided into different Marcellus Shale production categories based the amount of Marcellus Shale gas production in a particular HUC-12 sub-watershed. All samples …
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Estimation of groundwater recharge along a precipitation gradient for Savannah aquifers in Namibia with special emphasis on the impact of vegetation
The quantification of groundwater resources is essential especially in water scarce countries like Namibia as well as the assessment of the influence of vegetation on groundwater recharge for a better management and sustainability of savannah aquifers. This study has two specific objectives which …
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Novel Insights into the Palaeomagnetism of Serpentinized Peridotites from the Troodos and Oman Ophiolites
… tectonic uplift and/or reaction with modern meteoric water.<br/> <br/>The Late Cretaceous Samail/Semail ophiolite in Oman and the UAE (hereafter referred to as the Oman ophiolite) underwent a large tectonic rotation of ~120° after it formed. Serpentinization of the mantle peridotites of this …
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Geology and isotope geochemistry of the Beaver-Temiskaming Silver Mine, Cobalt, Ontario
… Carbonate isotopic data were reset by meteoric water. Connate waters, interpreted from fluid inclusion data, equilibrated with Archean sulphide-rich interflow units and overlying Proterozoic detritus (Pb isotopic data) and then deposited these elements in veins after the diabase had …
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New heat flow values from Virginia
… a model of moderately deep circulation of meteoric water possibly coupled with the heat generation of buried plutonic rocks to explain the origin of the hot springs in Hot Springs, Virginia.
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Analysis of calcite-filled faults in carbonate strata, balcones trend near Waco, Texas.
… stable isotopes in 174 samples indicate that the water from which the calcite precipitated is formation water and not meteoric water, while oxygen isotopes indicate that precipitation of secondary calcite in the fault cores occurred between 48° and 110°C. Mechanical twins in macrospar calcite …
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Establishing High-Resolution Hydrogeological, Geochemical and Isotopic Baseline Conditions of the Fresh Water Zone at a Field Research Site Near Brooks, Alberta, Canada
… characterization of dissolved gases in groundwater at the CMC field research site from 25.0 to 106.3 m depths was conducted. Data was collected from a continuously cored 106.3 m deep borehole, a 100.0 m deep Westbay® multi-level system and a 67.1 m deep domestic well. The multi-level well with …
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Pedogenic gypsum of southern New Mexico: Genesis, morphology, and stable isotopic signature
… the delta18 O and deltaD ratios of the hydration water of pedogenic gypsum and the delta18O/deltaD ratios of meteoric water. However, a pedogenic origin for the sampled gypsum was not clearly supported and the results from this procedure were not compared to other paleoclimatic indicators. …
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The hydrochemical and isotopic characterization of groundwater in southern Mozambique
A groundwater chemistry sampling campaign was run over two sampling seasons in 2018. Groundwater samples were taken across the region of southern Mozambique, between the towns of Namaacha, Catuane, Ponta do Ouro and Marracuene. Major anions and cations were analyzed by two labs at Stellenbosch …
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Stable isotope hydrology of the Table Mountain group
… such as thunderstorms. Using weighted data, the meteoric water line is δD = 6.15 δ¹⁸O + 8.21, which is similar to previous equations. The best fit line for groundwater δ values is δD = 7.09 δ¹⁸O + 10.08, the steeper gradient and higher intercept reflecting the predominance of heavy rainfall …
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Evaluation of Paleo-climate for the Boise Area, Idaho, from the last Glacial Maximum to the Present Based on delta 2H and delta 18O Groundwater Composition
<p>There are four distinguishable groundwater systems in the Boise area, Idaho, U.S.A., identified as modern batholith, thermal batholith, Boise frontal fault, and Nampa-Caldwell systems (Figure 1). Modern batholith and thermal batholith groundwaters are located in Tertiary to Cretaceous aged …
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Gold-quartz vein mineralization in Stanly County, North Carolina
… that the veins were deposited by recirculating meteoric water which was heated at depth and which scavenged gold from a small volume (0.03 km³) of the underlying and adjacent rocks.
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Manganese mineralization hosted by the Rocky Gap Sandstone in Bland County, Virginia
… deposited on a shallow marine shelf in a warm water environment. Conodont color indexes indicate the host was buried as deeply as 4 km and heated to 150°C. Romanechite, goethite, and pyrolusite are the three most important oxides, and can coexist at 25°C and 1 bar. In polished section …
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Stability of paleosinks and karstic carbonates in the Southern Fire Clay Mining District of Missouri
… are: (1) A southerly shift in the regional groundwater divide relative to the topographic divide. This possibly is caused by the distribution of leaking clay pits, which suggests that the bedrock permeability or hydraulic conductivity has been increased towards the north. (2) Stratigraphic and …
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Hydrological and ecological observations along the eastern Beaufort Sea coast of Alaska
… that provide habitat for migratory fish and waterfowl that are essential to the subsistence and culture of Iñupiat communities of northern Alaska. In the eastern Beaufort, in particular, residents of Kaktovik rely heavily on the high benthic productivity of these lagoon systems to support the …
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