Radon in groundwater of the Long Valley Caldera, California

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In the Long Valley caldera, an area of recently (approx.550 y) active volcanism and current seismic activity, /sup 222/Rn concentrations in hot, warm, and cold spring waters have been measured since 1982. Rn contents of the waters correlate inversely with temperature and specific conductance, with high concentrations (1500 to 2500 pCi/l) occurring in dilute cold springs on the margins of the caldera, and low concentrations (12 to 25 pCi/l) in hot to boiling springs. Rn correlates only slightly with the uranium contents of the wide range of rocks which host the hydrological system feeding the springs. These environmental effects on ... continued below

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Pages: 32

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Flexser, S.; Wollenberg, H.A. & Smith, A.R. April 1, 1987.

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Description

In the Long Valley caldera, an area of recently (approx.550 y) active volcanism and current seismic activity, /sup 222/Rn concentrations in hot, warm, and cold spring waters have been measured since 1982. Rn contents of the waters correlate inversely with temperature and specific conductance, with high concentrations (1500 to 2500 pCi/l) occurring in dilute cold springs on the margins of the caldera, and low concentrations (12 to 25 pCi/l) in hot to boiling springs. Rn correlates only slightly with the uranium contents of the wide range of rocks which host the hydrological system feeding the springs. These environmental effects on the radon record may mask responses to small or distant seismic, volcanic, or crustal deformation events. To date, anomalous changes in water-borne Rn have been observed in connection with at least one earthquake, which occurred close to the monitoring site. This continuing study points out that an understanding of the geological setting, its associated hydrological system, and environmental influences is necessary to properly evaluate concentrations and changes in groundwater radioactivity.

Physical Description

Pages: 32

Notes

NTIS, PC A03/MF A01; 1.

Source

  • Conference on radon, radium, and other radioactivity in ground water: hydrogeologic impact and application to indoor airborne contamination, Somerset, NJ, USA, 7 Apr 1987

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  • Other: DE87010254
  • Report No.: LBL-23301
  • Report No.: CONF-8704123-1
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 6355890
  • Archival Resource Key: ark:/67531/metadc1204691

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • April 1, 1987

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 30, 2018, 12:23 p.m.

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Flexser, S.; Wollenberg, H.A. & Smith, A.R. Radon in groundwater of the Long Valley Caldera, California, article, April 1, 1987; California. (digital.library.unt.edu/ark:/67531/metadc1204691/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.