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Title: CO[sub 2] degassing in the Oregon Cascades

Abstract

The carbon isotope content of dissolved inorganic carbon was measured for large cold springs in the central Oregon Cascades. Low [sup 14]C activities in some of the springs are interpreted to result from the dissolution of diffuse emissions of magmatic CO[sub 2], even though volcanic activity has not occurred in this area for more than 1300 yr. On the basis of dissolved magmatic carbon concentrations in the springs, the authors infer a diffuse magmatic CO[sub 2] degassing rate of 3.4 [times] 10[sup 5] kg/yr per kilometer of arc for the central Oregon Cascades. The CO[sub 2] flux calculated from estimates of the mean magmatic intrusion rate and experimentally determined values of CO[sub 2] content in melts is consistent with that determined from their measurements of the dissolved CO[sub 2] flux at springs.

Authors:
;  [1];  [2]
  1. (Univ. of Oregon, Eugene, OR (United States). Dept. of Geological Sciences)
  2. (Lawrence Livermore National Lab., CA (United States). Isotope Sciences Div.)
Publication Date:
OSTI Identifier:
6146823
Resource Type:
Journal Article
Journal Name:
Geology
Additional Journal Information:
Journal Volume: 27:9; Journal ID: ISSN 0091-7613
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; 54 ENVIRONMENTAL SCIENCES; CARBON DIOXIDE; CASCADE MOUNTAINS; DEGASSING; DISSOLVED GASES; ECOLOGICAL CONCENTRATION; ISOTOPE RATIO; VOLCANISM; WATER SPRINGS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; FLUIDS; GASES; MOUNTAINS; OXIDES; OXYGEN COMPOUNDS; SOLUTES; 150200* - Geology & Hydrology of Geothermal Systems; 540110

Citation Formats

James, E.R., Manga, M., and Rose, T.P. CO[sub 2] degassing in the Oregon Cascades. United States: N. p., 1999. Web. doi:10.1130/0091-7613(1999)027<0823:CDITOC>2.3.CO;2.
James, E.R., Manga, M., & Rose, T.P. CO[sub 2] degassing in the Oregon Cascades. United States. doi:10.1130/0091-7613(1999)027<0823:CDITOC>2.3.CO;2.
James, E.R., Manga, M., and Rose, T.P. Wed . "CO[sub 2] degassing in the Oregon Cascades". United States. doi:10.1130/0091-7613(1999)027<0823:CDITOC>2.3.CO;2.
@article{osti_6146823,
title = {CO[sub 2] degassing in the Oregon Cascades},
author = {James, E.R. and Manga, M. and Rose, T.P.},
abstractNote = {The carbon isotope content of dissolved inorganic carbon was measured for large cold springs in the central Oregon Cascades. Low [sup 14]C activities in some of the springs are interpreted to result from the dissolution of diffuse emissions of magmatic CO[sub 2], even though volcanic activity has not occurred in this area for more than 1300 yr. On the basis of dissolved magmatic carbon concentrations in the springs, the authors infer a diffuse magmatic CO[sub 2] degassing rate of 3.4 [times] 10[sup 5] kg/yr per kilometer of arc for the central Oregon Cascades. The CO[sub 2] flux calculated from estimates of the mean magmatic intrusion rate and experimentally determined values of CO[sub 2] content in melts is consistent with that determined from their measurements of the dissolved CO[sub 2] flux at springs.},
doi = {10.1130/0091-7613(1999)027<0823:CDITOC>2.3.CO;2},
journal = {Geology},
issn = {0091-7613},
number = ,
volume = 27:9,
place = {United States},
year = {1999},
month = {9}
}