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Flow rates and reaction rates in the Galapagos Rise spreading center hydrothermal system as inferred from 228 Ra/ 226 Ra in vesicomyid c...
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| Zeitschriftentitel: | Proceedings of the National Academy of Sciences |
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| Personen und Körperschaften: | , |
| In: | Proceedings of the National Academy of Sciences, 83, 1986, 17, S. 6241-6244 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Proceedings of the National Academy of Sciences
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| Schlagwörter: |
| Zusammenfassung: | <jats:p> The <jats:sup>228</jats:sup> Ra/ <jats:sup>226</jats:sup> Ra ratios in a previously dated vesicomyid clam shell were used to determine that seawater was in contact with mid-oceanic-ridge basalt glass for 22-45 years prior to arrival to the surface at 350°C at the Galapagos Rise Spreading Center. The minimum rate of reaction for the 45-year sojourn time, based on a water/rock ratio of 2.8 derived from <jats:sup>226</jats:sup> Ra concentrations, is 8 g of basalt altered per kg of seawater per year. </jats:p> |
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| Umfang: | 6241-6244 |
| ISSN: |
0027-8424
1091-6490 |
| DOI: | 10.1073/pnas.83.17.6241 |