CO{sub 2} degassing in the Oregon Cascades
- Univ. of Oregon, Eugene, OR (United States). Dept. of Geological Sciences
- Lawrence Livermore National Lab., CA (United States). Isotope Sciences Div.
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.
- OSTI ID:
- 697155
- Journal Information:
- Geology, Vol. 27, Issue 9; Other Information: PBD: Sep 1999
- Country of Publication:
- United States
- Language:
- English
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