Redox variations in Mauna Kea lavas, the oxygen fugacity of the Hawaiian plume, and the role of volcanic gases in Earth’s oxygenation
- Author:
- Brounce, Maryjo, Stolper, Edward M., Eiler, John M.
- Title:
- Redox variations in Mauna Kea lavas, the oxygen fugacity of the Hawaiian plume, and the role of volcanic gases in Earth’s oxygenation
- Periodical:
- Proceedings of the National Academy of Sciences of the United States of America
- Year:
- 2017
- Volume:
- 114
- Pages:
- 8997-9002
- Subject:
- Volcanic ash, tuff, etc. Mauna Kea volcano
- Summary:
- Volcanic degassing at Mauna Kea volcanoes decreases the oxidation state of both Fe and S in the magmas, consistent with recent results from Kilauea volcano. The least degassed magmas from Mauna Kea are more oxidized than midocean ridge basalt magmas, possibly due to plate tectonic cycling of material from the oxidized surface to the deepmantle,which is then returned to the surface as a component of buoyant plumes.
- Label:
- Geology
- Date:
- 2017 August
- Collection:
- Periodicals