Noble gas recharge temperatures and the excess air component

Wilson, George; McNeill, G.W.

doi:10.1016/s0883-2927(97)00035-8

Cited by 80 publications

(42 citation statements)

References 26 publications

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“…23c) and interpreted it in terms of a climatic transition. Wilson and McNeill (1997) compared the Ne excess from aquifers in different lithologies and climates. Their main conclusion was that lithology had a strong influence on the Ne excess, which was found to increase from granites over sandstones to limestones.…”

Section: Excess Airmentioning

confidence: 99%

Noble Gases in Lakes and Ground Waters

Kipfer

Aeschbach–Hertig

Peeters

et al. 2002

Reviews in Mineralogy and Geochemistry

316

352

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Section: Excess Airmentioning

confidence: 99%

Noble Gases in Lakes and Ground Waters

Kipfer

Aeschbach–Hertig

Peeters

et al. 2002

Reviews in Mineralogy and Geochemistry

316

352

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“…Specialty sampling for DG-CFCs used equipment and methods that are described by Busenberg and others (1999), Plummer and Friedman (1999), Stute and others (1992), and Wilson and McNeill (1997). A description of sampling equipment and methods, as well as the USGS applications of the resulting data, also are provided on the Internet (http://water.usgs.gov/lab/cfc and http: //water.usgs.gov/lab/ dissolved-gas, accessed October 3, 2012).…”

Section: Field Methods Used To Sample For Other Constituentsmentioning

confidence: 99%

“…The DG-CFC samples were analyzed by the USGS Chlorofluorocarbon Laboratory in Reston, Va., using analytical methods described by Busenberg and others (1999), Plummer and Friedman (1999), Stute and others (1992), and Wilson and McNeill (1997). The analytical methods also are described on the Internet at http: //water.usgs.gov/lab/cfc, and http://water.usgs.gov/lab/dissolved-gas (accessed October 3, 2012).…”

Section: Methodsmentioning

confidence: 99%

“…The DG-CFC samples were analyzed at the USGS Reston Chlorofluorocarbon Laboratory. Sampling and analytical methods for DG-CFC are described by Busenberg and Plummer (1992), Busenberg and others (1999), Plummer and Friedman (1999), Stute and others (1992), and Wilson and McNeill (1997). The resulting data were reported by Yager and Arnold (2003, tables II.5 and II.6).…”

Section: Approachmentioning

confidence: 99%

See 1 more Smart Citation

Water quality at a biosolids-application area near Deer Trail, Colorado, 1993-1999

Yager¹

2014

Scientific Investigations Report

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprodTo order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Yager, T.J.B., 2014, Water quality at a biosolids-application area near Deer Trail, Colorado, 1993: U.S. Geological Survey Scientific Investigations Report 2013. AbstractThe Metro Wastewater Reclamation District (Metro District) in Denver, Colo., applied biosolids resulting from municipal sewage treatment to farmland in eastern Colorado beginning in December 1993. In mid-1993, the U.S. Geological Survey in cooperation with the Metro District began monitoring water quality at the biosolids-application area about 10 miles east of Deer Trail, Colo., to evaluate baseline water quality and the combined effects of natural processes, land uses, and biosolids applications on water quality of the biosolidsapplication area. Water quality was characterized by baseline and post-biosolids-application sampling for selected inorganic and bacteriological constituents during 1993 through 1998, with some additional specialized sampling in 1999. The study included limited sampling of surface water and the unsaturated zone, but primarily focused on groundwater.The baseline data indicate that major-ion, nutrient, trace-element, and bacteria sources other than biosolids were present in the study area and that water in the study area was of variable quality before biosolids ever were applied. Large concentrations of chloride, sulfate, nitrate, iron, and manganese were detected in some baseline samples. Concentrations of other major ions, phosphorus, cadmium, chromium, nickel, and fecal streptococcus bacteria also were detected above the minimum reporting level in baseline samples.Variability in water quality of the study area was evident from the baseline data as well as from the data collected after biosolids applications began. The hydrology of the study area likely accounts for some of the variability in water quality; groundwater recharged preferentially from ponds and through desiccation cracks and coarse-grained deposits and outcrops, not uniformly through the unsaturated zone beneath all fields. Spatial variability was largest for concentrations of sulfate, nitrate, iron, and manganese. Soil pore-water data indicated that chloride, nitrate, and copper reservoirs in the upper 3 feet of the unsaturated zone could eventually migrate to the saturated zone. Temporal...

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“…This arises from the forcible dissolution of air bubbles during the recharge process, and is present in all groundwaters to varying extents, related to factors such as the nature of matrix porosity, amount of fracturing, and magnitude of seasonal variations in the elevation of the water table. The effect of these factors may change with rainfall intensity, and EA has therefore been proposed as a palaeopluviometer (Wilson and McNeill, 1997;Kipfer et al, 2002), but EA is generally viewed as a factor for which correction is needed. This is because the excess gas means that the measured noble gas concentrations are no longer solely the product of equilibrium at the recharge temperature.…”

Section: Noble Gas Recharge Temperaturesmentioning

confidence: 99%

The isotope hydrology of quaternary climate change☆

Darling

2011

Journal of Human Evolution

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Understanding the links between climate change and human migration and culture is an important theme in Quaternary archaeology. While oxygen and hydrogen stable isotopes in high-latitude ice cores provide the ultimate detailed record of palaeoclimate extending back to the Middle Pleistocene, groundwater can act as a climate archive for areas at lower latitudes, permitting a degree of calibration for proxy records such as lake sediments, bones and organic matter. Not only can oxygen and hydrogen stable isotopes be measured on waters, but the temperature of recharge can be calculated from the amount of the noble gases neon, argon, krypton and xenon in solution, while residence time can be estimated from the decay of the radioisotopes carbon-14, chlorine-36 and krypton-81 over timescales comparable to the ice core record. The Pleistocene-Holocene transition is well characterised in aquifers worldwide, and it is apparent that isotope-temperature relationships of the present day are not necessarily transferable to past climatic regimes, with important implications for the interpretation of proxy isotope data. Groundwaters dating back to one million years, i.e. to beyond the Middle Pleistocene, are only found in major aquifer basins and information is relatively sparse and of low resolution. Speleothem fluid inclusions offer a way of considerably increasing this resolution, but both speleothem formation and large-scale groundwater recharge require humid conditions which may be relatively infrequent for areas currently experiencing arid climates. Both types of record therefore require caution in their interpretation when considering a particular archaeological context.

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Noble gas recharge temperatures and the excess air component

Cited by 80 publications

References 26 publications

Noble Gases in Lakes and Ground Waters

Noble Gases in Lakes and Ground Waters

Water quality at a biosolids-application area near Deer Trail, Colorado, 1993-1999

The isotope hydrology of quaternary climate change☆

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