Journal article
Origin of K2O-SiO2 trends in volcanoes of the Mariana Arc
Geology (Boulder), Vol.11(2), pp.67-71
02/1983
DOI: 10.1130/0091-7613(1983)11<67:OOKTIV>2.0.CO;2
Abstract
Lavas from volcanoes in the Mariana Arc show a range of K2O-SiO2 trends even though the volcanoes are all nearly the same distance above the Benioff zone. The preferred petrologic explanation for the K2O-SiO2 variations invokes differences in the degree of partial melting required to produce lavas for each volcano from a relatively homogeneous source material. The Mariana Arc volcanoes appear to evolve chemically in a manner similar to oceanic volcanoes (e.g., Hawaii) with early and late alkalic stages dominated by an intermediate tholeiitic stage. If volcanoes in other arcs also undergo this evolution, many of the anomalies in K2O-depth relations in modern arcs could be explained.—Journal abstract.
Details
- Title: Subtitle
- Origin of K2O-SiO2 trends in volcanoes of the Mariana Arc
- Creators
- Arend Meijer - University of ArizonaMark Reagan - University of Arizona
- Resource Type
- Journal article
- Publication Details
- Geology (Boulder), Vol.11(2), pp.67-71
- Publisher
- Geological Society of America (GSA)
- DOI
- 10.1130/0091-7613(1983)11<67:OOKTIV>2.0.CO;2
- ISSN
- 0091-7613
- eISSN
- 1943-2682
- Language
- English
- Date published
- 02/1983
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9984229162302771
Metrics
21 Record Views