{sup 36}Cl studies of water movements deep within unsaturated tuffs

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Measurements of {sup 36}Cl in cuttings from a borehole that was drilled 387 m into unsaturated tuffs indicate the possible detection of significant radioactive decay of cosmogenic {sup 36}Cl in two of the samples. However, the {sup 36}Cl/Cl ratio was found to vary with the amount of pulverization of the cuttings. Work is in progress to separate the {sup 36}Cl/Cl data into cosmogenic and in situ components. The cosmogenic component will be used to trace very slow water movements through the unsaturated zone. Bomb pulse {sup 36}Cl was observed as deep as 153 m, and this identification is not constrained … continued below

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8 p.

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Norris, A. E.; Bentley, H. W.; Cheng, S.; Kubik, P. W.; Sharma, P. & Gove, H. E. May 1, 1990.

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Measurements of {sup 36}Cl in cuttings from a borehole that was drilled 387 m into unsaturated tuffs indicate the possible detection of significant radioactive decay of cosmogenic {sup 36}Cl in two of the samples. However, the {sup 36}Cl/Cl ratio was found to vary with the amount of pulverization of the cuttings. Work is in progress to separate the {sup 36}Cl/Cl data into cosmogenic and in situ components. The cosmogenic component will be used to trace very slow water movements through the unsaturated zone. Bomb pulse {sup 36}Cl was observed as deep as 153 m, and this identification is not constrained by the problem with pulverization. This work shows the efficacy of {sup 36}Cl measurements for detecting modern water movements deep in the unsaturated zone. 9 refs., 3 tabs.

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8 p.

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INIS; OSTI as DE90010621

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  • 5. international conference on accelerator mass spectrometry, Paris (France), 23-27 Apr 1990

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  • Other: DE90010621
  • Report No.: LA-UR--90-1461
  • Report No.: CONF-900491--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 137732
  • Archival Resource Key: ark:/67531/metadc619463

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  • May 1, 1990

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  • June 16, 2015, 7:43 a.m.

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Norris, A. E.; Bentley, H. W.; Cheng, S.; Kubik, P. W.; Sharma, P. & Gove, H. E. {sup 36}Cl studies of water movements deep within unsaturated tuffs, article, May 1, 1990; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc619463/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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