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14C Groundwater Age and the Importance of Chemical Fluxes Across Aquifer Boundaries in Confined Cretaceous Aquifers of North Carolina, USA

Published online by Cambridge University Press:  18 July 2016

Casey D Kennedy  and
David P Genereux
Casey D Kennedy*
Affiliation:
North Carolina State University, Raleigh, North Carolina, USA
David P Genereux
Affiliation:
North Carolina State University, Raleigh, North Carolina, USA
*
Corresponding author. Email: cdkenned@ncsu.edu
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Abstract

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Radiocarbon activity, He concentrations, and other geochemical parameters were measured in groundwater from the confined Black Creek (BC) and Upper Cape Fear (UCF) aquifers in the Coastal Plain of North Carolina. 14C ages adjusted for geochemical and diffusion effects ranged from 400 to 21,900 BP in the BC, and 13,400 to 26,000 BP in the underlying UCF; ages increased coastward in both aquifers. Long-term average linear groundwater velocity is about 2.5 m/yr for the BC, and somewhat larger for the UCF. Aquifer-aquitard exchange is an important influence on the DIC concentration, 14C activity, and estimated age of aquifer groundwater. Accounting for this exchange in 14C age calculations places the groundwater samples with the lowest estimated recharge temperatures nearest in time to the last glacial maximum. Traditional geochemical correction models that do not account for aquifer-aquitard exchange significantly overestimate groundwater age. He concentration in groundwater varies with both age and stratigraphic position. Dissolved He data provide strong evidence of upward vertical He transport through the study aquifers; data from the UCF are broadly consistent with the pattern expected for a confined aquifer receiving a concentrated, localized He flux from below (based on a previously published model for this situation), in this case most likely from crystalline bedrock. He has potential as an indicator of groundwater age in the study aquifers, if interpreted within an appropriate analytical framework that includes the observed strong vertical transport. δ18O in the oldest groundwater is enriched (relative to modern groundwater) by 1 to 1.2‰, the opposite of the δ18O depletion found in many old groundwaters but consistent with the enrichment found in groundwater in this age range in Georgia and Florida.

Type
Articles
Information
Radiocarbon , Volume 49 , Issue 3 , 2007 , pp. 1181 - 1203
Copyright
Copyright © 2007 by the Arizona Board of Regents on behalf of the University of Arizona 

References

Aeschbach-Hertig, W, Stute, M, Clark, JF, Reuter, RF, Schlosser, P. 2002. A paleotemperature record derived from dissolved noble gases in groundwater of the Aquia aquifer (Maryland, USA). Geochimica et Cosmochimica Acta 66(5):797–817.CrossRefGoogle Scholar
Appelo, CAJ. 1994. Cation and proton exchange, pH variations, and carbonate reactions in a freshening aquifer. Water Resources Research 30(10):2793–806.CrossRefGoogle Scholar
Aravena, R, Wassenaar, LI, Plummer, LN. 1995. Estimating 14C groundwater ages in a methanogenic aquifer. Water Resources Research 31(9):2307–17.CrossRefGoogle Scholar
Aucott, WR. 1988. The predevelopment ground-water flow system and hydrologic characteristics of the Coastal Plain aquifers of South Carolina. US Geological Survey Water Resources Investigation Report 86–4347. 66 p.Google Scholar
Bath, AH, Edmunds, WM, Andrews, JN. 1979. Paleoclimatic trends deduced from the hydrochemistry of a Triassic sandstone aquifer, United Kingdom. In: Isotope Hydrology. Volume II. Vienna: International Atomic Energy Agency. p 545–66.Google Scholar
Bethke, CM, Johnson, TM. 2002. Paradox of groundwater age: correction. Geology 30(4):385–8.Google Scholar
Blavoux, B, Olive, P. 1981. Radiocarbon dating of groundwater of the aquifer confined in the Lower Triassic sandstones of the Lorraine region, France. Journal of Hydrology 54(1–3):167–83.CrossRefGoogle Scholar
Brook, GA, Folkoff, ME, Box, EO. 1983. A world model of soil carbon dioxide. Earth Surface Processes and Landforms 8(3):79–88.CrossRefGoogle Scholar
Burt, RA. 1993. Ground-water chemical evolution and diagenetic processes in the Upper Floridan aquifer, southern South Carolina and northeastern Georgia. US Geological Survey Professional Paper 2392. 76 p.Google Scholar
Busenberg, E, Plummer, LN, Bartholomay, RC, Wayland, JE. 1998. Chlorofluorocarbons, sulfur hexafluoride and dissolved permanent gases in ground water from selected sites at and near the Idaho National Engineering and Environmental Laboratory, Idaho, 1994–97. US Geological Survey Open-File Report 98–274.72 p.CrossRefGoogle Scholar
Busenberg, E, Plummer, LN, Doughten, MW, Widman, PK, Bartholomay, RC. 2000. Chemical, isotopic compositions, and gas concentrations of ground water at and near the Idaho National Engineering and Environmental Laboratory, Idaho, 1994–97. US Geological Survey Open-File Report 00–81. 55 p.CrossRefGoogle Scholar
Carslaw, H, Jaeger, J. 1959. Conduction of Heat in Solids. Oxford: Oxford University Press. 510 p.Google Scholar
Castro, MC, Stute, M, Schlosser, P. 2000. Comparison of 4He ages and 14C ages in simple aquifer systems: implications for groundwater flow and chronologies. Applied Geochemistry 15(8):1137–67.CrossRefGoogle Scholar
Chapelle, FH, Knobel, LL. 1983. Aqueous geochemistry and the exchangeable cation composition of glauconite in the Aquia aquifer, Maryland. Ground Water 21(3):343–52.CrossRefGoogle Scholar
Chapelle, FH, Lovley, DR. 1990. Rates of microbial metabolism in deep Coastal Plain aquifers. Applied and Environmental Microbiology 56(6): 1865–74.CrossRefGoogle ScholarPubMed
Chapelle, FH, McMahon, PB. 1991. Geochemistry of dissolved inorganic carbon in a Coastal Plain aquifer. 1. Sulfate from confining beds as an oxidant in microbial CO2 production. Journal of Hydrology 127:85–108.CrossRefGoogle Scholar
Clark, JF, Stute, M, Schlosser, P, Drenkard, S, Bonani, G. 1997. A tracer study of the Floridan aquifer in south eastern Georgia: implications for groundwater flow and paleoclimate. Water Resources Research 33(2):281–9.CrossRefGoogle Scholar
Clark, JF, Davisson, ML, Hudson, GB, Macfarlane, PA. 1998. Noble gases, stable isotopes, and radiocarbon as tracers of flow in the Dakota aquifer, Colorado and Kansas. Journal of Hydrology 211(1–4):151–67.CrossRefGoogle Scholar
Clarke, WB, Jenkins, WJ, Top, Z. 1976. Determination of tritium by mass spectrometric measurement of 3He. International Journal of Applied Radiation and Isotopes 27(9):515–22.CrossRefGoogle Scholar
Craig, H. 1953. The geochemistry of the stable carbon isotopes. Geochimica et Cosmochimica Acta 3(2–3): 53–92.CrossRefGoogle Scholar
DePaolo, DJ. 2006. Isotopic effects in fracture-dominated reactive fluid-rock systems. Geochimica et Cosmochimica Acta 70(5):1077–96.CrossRefGoogle Scholar
Drake, JJ. 1980. The effect of soil activity on the chemistry of carbonate groundwater. Water Resources Research 16(2):381–6.CrossRefGoogle Scholar
Dutton, AR, Simpkins, WW. 1989. Isotopic evidence for paleohydrologic evolution of ground-water flow paths, southern Great Plains, United States. Geology 17(7):653–6.2.3.CO;2>CrossRefGoogle Scholar
Eaton, AD, Clesceri, LS, Greenberg, AE. 1995a. Method 3120 B. – Metals by plasma emission spectroscopy: inductively coupled plasma (ICP) method. In: Standard Methods for Examination of Water and Wastewater. 19th edition. Washington, DC: American Public Health Association.Google Scholar
Eaton, AD, Clesceri, LS, Greenberg, AE. 1995b. Method 5310 B. – Total organic carbon (toc), high-temperature combustion method. In: Standard Methods for Examination of Water and Wastewater. 19th edition. Washington, DC: American Public Health Association.Google Scholar
Eichinger, L. 1983. A contribution to the interpretation of 14C groundwater ages considering the example of a partially confined sandstone aquifer. Radiocarbon 25(2):347–56.CrossRefGoogle Scholar
Eimers, JL, Lyke, WL, Brockman, AR. 1990. Simulation of groundwater flow in Cretaceous rocks in the central Coastal Plain, North Carolina. US Geological Survey Water-Resources Investigation Report 89–4153. 101 p.Google Scholar
Epstein, S, Mayeda, T. 1953. Variation of O18 content of water from natural sources. Geochimica et Cosmochimica Acta 4(5):213–24.CrossRefGoogle Scholar
Fontes, JC, Garnier, JM. 1979. Determination of the initial 14C activity of the total dissolved carbon: a review of the existing models and a new approach. Water Resources Research 15(2):399–413.CrossRefGoogle Scholar
Freeze, RA, Cherry, JA. 1979. Groundwater. Englewood Cliffs: Prentice Hall. 604 p.Google Scholar
Fritz, P, Frape, SK, Drimmie, RJ, Heemskerk, AR. 1986. Reply to comments by Grabczak et al. on “Water-rock interaction and chemistry of groundwaters from the Canadian Shield.” Geochimica et Cosmochimica Acta 50(7):1561–3.CrossRefGoogle Scholar
Geyh, MA. 2000. An overview of 14C analysis in the study of groundwater. Radiocarbon 42(3):99–114.CrossRefGoogle Scholar
Giese, GL, Eimers, JL, Coble, RW. 1997. Simulation of ground water flow in the Coastal Plain aquifer system of North Carolina. US Geological Survey Professional Paper 1404–M. 142 p.CrossRefGoogle Scholar
Heaton THE. 1981. Dissolved gases: some applications to groundwater research. Transactions of the Geological Society of South Africa 84(2):91–7.Google Scholar
Heaton THE, Vogel, JC. 1981. “Excess air” in groundwater. Journal of Hydrology 50:201–16.Google Scholar
Henderson, T. 1985. Geochemistry of ground-water in two sandstone aquifer systems in the Northern Great Plains in parts of Montana and Wyoming. US Geological Survey Professional Paper, 1402–CC. 84 p.CrossRefGoogle Scholar
Hendry, MJ, Wassenaar, LI. 2005. Origin and migration of dissolved organic carbon fractions of clay-rich aquitard: 14C and δ13C evidence. Water Resources Research 41(2):2021–31.CrossRefGoogle Scholar
Ingerson, R, Pearson, FJ. 1964. Estimation of age and rate of motion of groundwater by the 14C method. In: Miyake, Y, Koyama, T, editors. Recent Research in the Field of Hydrosphere, Atmosphere and Nuclear Geochemistry. Tokyo: Marusen. p 263–83.Google Scholar
Kalin, RM. 2000. Radiocarbon dating of groundwater systems. In: Cook, PG, Herczeg, AL, editors. Environmental Tracers in Subsurface Hydrology. Boston: Kluwer Academic. p 111–44.Google Scholar
Kazemi, GA, Lehr, JH, Perrochet, P. 2006. Groundwater Age. New York: John Wiley and Sons. 325 p.CrossRefGoogle Scholar
Kennedy, CD. 2004. Pilot project on groundwater dating in confined aquifers of the North Carolina Coastal Plain [MS thesis]. Raleigh: North Carolina State University.Google Scholar
Kiefer, RH, Amey, RG. 1992. Concentrations and controls of soil carbon dioxide in sandy soil in the North Carolina coastal plain. Catena 19(6):539–59.CrossRefGoogle Scholar
Knobel, LL, Chapelle, FH, Meisler, H. 1998. Geochemistry of the northern Atlantic Coastal Plain aquifer system. US Geological Survey Professional Paper 1404–L. 57 p.CrossRefGoogle Scholar
Landmeyer, JE, Stone, PA. 1995. Radiocarbon and δ13C values related to ground-water recharge and mixing. Ground Water 33(2):227–34.CrossRefGoogle Scholar
Lautier, JC. 2001. Hydrogeologic framework and ground water conditions in the North Carolina central Coastal Plain. North Carolina Department of Environment and Natural Resources, Division of Water Resources, Raleigh, North Carolina. 38 p.Google Scholar
Lee, RW, Strickland, DJ. 1988. Geochemistry of groundwater in Tertiary and Cretaceous sediments of the southeastern Coastal Plain in eastern Georgia, South Carolina, and southeastern North Carolina. Water Resources Research 24(2):291–303.CrossRefGoogle Scholar
Madison, RJ, Brunett, JO. 1984. Overview of the occurrence of nitrate in ground water of the United States. In: National Water Summary 1984—Hydrologic Events, Selected Water-Quality Trends, and Groundwater Resources. US Geological Survey Water-Supply Paper 2275. p 93–105.Google Scholar
Maloszewski, P, Zuber, A. 1991. Influence of matrix diffusion and exchange reactions on radiocarbon ages in fissured carbonate aquifers. Water Resources Research 27(8):1937–45.CrossRefGoogle Scholar
Marine, IW. 1979. The use of naturally occurring helium to estimate groundwater velocities for studies of geologic storage of radioactive waste. Water Resources Research 15(5):1130–6.CrossRefGoogle Scholar
Mazor, E, Bosch, A. 1992. He as a semi-quantitative tool for groundwater dating in the range of 104 to 108 years. In: Isotopes of Noble Gases as Tracers in Environmental Studies. Vienna: International Atomic Energy Agency. p 163–78.Google Scholar
McMahon, PB. 2001. Aquifer/aquitard interfaces: mixing zones that enhance biogeochemical reactions. Hydrogeology Journal 9(3):34–43.CrossRefGoogle Scholar
McMahon, PB, Chapelle, FH. 1991a. Microbial production of organic acids in aquitard sediments and its role in aquifer geochemistry. Nature 349(6306):233–5.CrossRefGoogle Scholar
McMahon, PB, Chapelle, FH. 1991b. Geochemistry of dissolved inorganic carbon in a Coastal Plain aquifer. 2. Modeling carbon sources, sinks, and δ13C evolution. Journal of Hydrology 127(1–4): 109–35.CrossRefGoogle Scholar
McMahon, PB, Williams, DF, Morris, JT. 1990. Production and carbon isotopic composition of bacterial CO2 in deep Coastal Plain sediments of South Carolina. Ground Water 28(5):693–702.CrossRefGoogle Scholar
McMahon, PB, Böhlke, JK, Christenson, SC. 2004. Geochemistry, radiocarbon ages, and paleorecharge conditions along a transect in the central High Plains aquifer, southwestern Kansas, USA. Applied Geochemistry 19(11):1655–86.CrossRefGoogle Scholar
McNichol, AP, Jones, GA. 1991. Measuring 14C in seawater by accelerator mass spectrometry. In: WOCE Hydrographic Operations and Methods Manual, WOCE Hydrographic Programme Office, WOCE Report No. 68/91. Woods Hole: Woods Hole Oceanographic Institution.Google Scholar
Mook, WG, van der Plicht, J. 1999. Reporting 14C activities and concentrations. Radiocarbon 41(3):227–39.CrossRefGoogle Scholar
Neretnieks, I. 1981. Age dating of groundwater of fissured rock: influence of water volume in micropores. Water Resources Research 17(2):421–2.CrossRefGoogle Scholar
Nordstrom, DK, Plummer, LN, Wigley, TML, Wolery, TJ, Ball, JW, Jenne, EA, Bassett, RL, Crerar, DA, Florence, TM, Fritz, B, Hoffman, M, Holdren, GR Jr, Lafon, GM, Mattigod, SV, McDuff, RE, Morel, F, Reddy, MM, Sposito, G, Thrailkill, J. 1979. A comparison of computerized models for equilibrium calculations in aqueous systems. In: Jenne, EA, editor. Chemical Modeling in Aqueous Systems. Washington, DC: American Chemical Society. Symposium Series 43. p 857–92.Google Scholar
North Carolina Geological Survey. 1985. State Geologic Map of North Carolina. 1:500,000. Raleigh: North Carolina Geological Survey.Google Scholar
Olsson, IU. 1970. The use of oxalic acid as a standard. In: Olsson, IU, editor. Radiocarbon Variations and Absolute Chronology. Nobel Symposium, 12th Proceedings. New York: John Wiley and Sons. p 17.Google Scholar
Pearson, FJ Jr, White, DE. 1967. Carbon-14 ages and flow rate of water in Carrizo Sand, Atascosa County, Texas. Water Resources Research 3(3):251–61.CrossRefGoogle Scholar
Pearson, FJ Jr, Balderer, W, Loosli, HH, Lehmann, BE, Matter, A, Peters, TJ. 1991. Applied Isotope Hydrology: A Case Study in Northern Switzerland. Studies in Environmental Science Volume 43. Amsterdam: Elsevier. 430 p.Google Scholar
Plummer, LN. 1993. Stable isotope enrichment in paleo-waters of the southeast Atlantic Coastal Plain, United States. Science 262(5142):2016–20.CrossRefGoogle Scholar
Plummer, LN, Sprinkle, CL. 2001. Radiocarbon dating of dissolved inorganic carbon in groundwater from confined parts of the Upper Floridan aquifer, Florida, USA. Hydrogeology Journal 9(2):127–50.CrossRefGoogle Scholar
Plummer, LN, Jones, BF, Trusdell, AH. 1976. WATEQF-A FORTRAN IV version of WATEOF, a computer program for calculating chemical-equilibria of natural waters. US Geological Survey Water-Resources Investigation Report 76–14. 61 p.Google Scholar
Plummer, LN, Prestemon, EC, Parkhurst, DL. 1994. An interactive code (NETPATH) for modeling net geochemical reactions along a flow path, version 2.0. US Geological Survey Water Resources Investigations Report 94-4169. 130 p.Google Scholar
Plummer, LN, Bohlke, JK, Busenberg, E. 2003. Approaches for ground-water dating. In: Residence times and nitrate transport in ground water discharging in the Chesapeake Bay watershed. US Geological Survey Water-Resources Investigation Report 03-4035. p 12–24.Google Scholar
Plummer, LN, Bexfield, LM, Anderholm, SK, Sanford, WE, Busenberg, E. 2004. Hydrochemical tracers in the middle Rio Grande Basin, USA: 1. Conceptualization of groundwater flow. Hydrogeology Journal 12(4): 359–88.CrossRefGoogle Scholar
Purdy, CB, Burr, GS, Rubin, M, Helz, GR, Mignerey, AC. 1992. Dissolved organic and inorganic 14C concentrations and ages for Coastal Plain aquifers in southern Maryland. Radiocarbon 34(3):654–63.CrossRefGoogle Scholar
Raymond, LA. 1995. Petrology: The Study of Igneous, Sedimentary, and Metamorphic Rocks. Boston: WCB/McGraw-Hill, Inc. 742 p.Google Scholar
Reid, MS, Renken, RA, Wait, RL, Aucott, WR, Lee, RW. 1986. Hydrologic and geologic analysis of two wells in Marion County, South Carolina. US Geological Survey Water-Resources Investigation Report 86–4102. 20 p.Google Scholar
Sanford, WE. 1997. Correcting for diffusion in carbon-14 dating of ground water. Ground Water 35(2):357–61.CrossRefGoogle Scholar
Sohl, NF, Owens, JP. 1991. Cretaceous stratigraphy of the Carolina Coastal Plain. In: Horton, JW Jr, Zullo, VA, editors. The Geology of the Carolinas: Carolina Geological Society 50th Anniversary. 1st edition. Knoxville: University of Tennessee Press. p 191–220.Google Scholar
Solomon, DK. 2000. 4He in groundwater. In: Cook, PG, Herczeg, AL, editors. Environmental Tracers in Subsurface Hydrology. Boston: Kluwer Academic. p 425–39.Google Scholar
Stuiver, M, Polach, HA. 1977. Discussion: reporting of 14C data. Radiocarbon 19(3):355–63.CrossRefGoogle Scholar
Stumm, W, Morgan, JJ. 1996. Aquatic Chemistry: Chemical Equilibria and Rates in Natural Waters. New York: Wiley-Interscience. 1022 p.Google Scholar
Stute, M, Schlosser, P. 2000. Atmosphere noble gases. In: Cook, PG, Herczeg, AL, editors. Environmental Tracers in Subsurface Hydrology. Boston: Kluwer Academic. p 349–77.Google Scholar
Stute, M, Sonntag, C. 1992. Paleotemperatures derived from noble gases dissolved in groundwater and in relation to soil temperature. In: Isotopes of Noble Gases as Tracers in Environmental Studies. Vienna: International Atomic Energy Agency. p 111–22.Google Scholar
Stute, M, Schlosser, P, Clark, JF, Broecker, WS. 1992. Paleotemperatures in the southwestern United States derived from noble gases in ground water. Science 256(5059):1000–3.CrossRefGoogle ScholarPubMed
Stute, M, Clark, JF, Schlosser, P, Broecker, WS, Bonani, G. 1995. A 30,000 yr continental paleotemperature record derived from noble gases dissolved in groundwater from the San Juan Basin, New Mexico. Quaternary Research 43(2):209–20.CrossRefGoogle Scholar
Sudicky, EA, Frind, EO. 1981. Carbon 14 dating of groundwater in confined aquifers: implication of aquitard diffusion. Water Resources Research 17(4):1060–4.CrossRefGoogle Scholar
Tamers, MA. 1975. Validity of radiocarbon dates on groundwater. Surveys in Geophysics 2(2):217–39.Google Scholar
Torgersen, T, Ivey, GN. 1985. Helium accumulation in groundwater. II: A model for the accumulation of crustal 4He degassing flux. Geochimica et Cosmochimica Acta 49(11):2445–52.CrossRefGoogle Scholar
USEPA (US Environmental Protection Agency). 1993. Determination of inorganic anions by ion chromatography. US Environmental Protection Agency Method 300.0, Revision 2.1, Cincinnati, Ohio, USA.Google Scholar
USEPA (US Environmental Protection Agency). 1994. Methods for the determination of metals in environmental samples – Supplement 1. US Environmental Protection Agency, EPA-600/R-94-11.Google Scholar
Wassenaar, LI, Hendry, MJ. 1999. Improved piezometer construction and sampling techniques to determine pore water chemistry in aquitards. Ground Water 37(4):564–71.CrossRefGoogle Scholar
Wassenaar, LI, Hendry, MJ. 2000. Mechanisms controlling the distribution and transport of 14C in a clay-rich till aquitard. Ground Water 38(3):343–9.CrossRefGoogle Scholar
Weiss, RF. 1970. The solubility of nitrogen, oxygen and argon in water and seawater. Deep-Sea Research and Oceanographic Abstracts 17(4):721–35.CrossRefGoogle Scholar
Weiss, RF. 1971. Solubility of helium and neon in water and seawater. Journal of Chemical and Engineering Data 16(2):235–41.CrossRefGoogle Scholar
Winner, MD Jr, Coble, RW. 1996. Hydrogeologic framework of the North Carolina Coastal Plain, regional aquifer-system analysis-northern Atlantic Coastal Plain. US Geological Survey Professional Paper 1404-I. 106 p.CrossRefGoogle Scholar
Zack, A, Roberts, I. 1988. The geochemical evolution of aqueous sodium in the Black Creek aquifer, Horry and Georgetown counties, South Carolina. US Geological Survey Water-Supply Paper 2324 76–60. 15 p.Google Scholar
Zhao, X, Fritzel Hernán, TLB, Quinodoz, AM, Bethke, CM, Torgersen, T. 1998. Controls on the distribution and isotopic composition of helium in deep groundwater flows. Geology 26(4):291–4.2.3.CO;2>CrossRefGoogle Scholar