書誌事項
- 公開日
- 2013-11
- 資源種別
- journal article
- DOI
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- 10.1130/g34620.1
- 公開者
- Geological Society of America
この論文をさがす
説明
Large amounts of CO 2 are transferred from Earth’s interior to the surface by volcanism. On a geological time scale, the rate of CO 2 emission has controlled the evolution of Earth’s atmosphere and climate, as well as the dynamic processes that take place in the mantle and core. The total rate of natural CO 2 emission from Earth has been estimated on the basis of CO 2 fl ux from arc, mid-ocean-ridge, and hotspot volcanism. However, previous estimates have overlooked the CO 2 emitted from a recently discovered type of volcanism—petit-spot volcanism—that occurs on the deep-sea fl oor. Here, we measure the CO 2 and H 2 O contents of glassy basalts produced by petit-spot volcanism and estimate the initial contents to be >5 wt% and 1.0–1.1 wt%, respectively. Based on these values and magma fl ux of petitspot volcanism, we show that the rate of CO 2 emission from petitspot volcanoes (2.7–5.4 × 10 11 g CO 2 yr –1 ) is a few percent of the CO 2 emissions from arc and mid-ocean-ridge volcanism, and up to ~14% of that from hotspot volcanism. Thus, the contribution to the carbon cycle on Earth of the large amounts of CO 2 that have been emitted from the deep-sea fl oor by petit-spot volcanism has not previously been recognized.
収録刊行物
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- Geology
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Geology 41 (11), 1167-1170, 2013-11
Geological Society of America
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詳細情報 詳細情報について
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- CRID
- 1360004236002427264
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- DOI
- 10.1130/g34620.1
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- ISSN
- 19432682
- 00917613
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- 資料種別
- journal article
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- データソース種別
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- Crossref
- KAKEN
- OpenAIRE
