Nature and cause of compositional variation among the alkalic cap lavas of Mauna Kea Volcano, Hawaii
- Author:
- West, H.B., Garcia, M.O., Frey, F.A., Kennedy, A.
- Title:
- Nature and cause of compositional variation among the alkalic cap lavas of Mauna Kea Volcano, Hawaii
- Periodical:
- Contributions to Mineralogy and Petrology
- Year:
- 1988
- Volume:
- 100
- Pages:
- 383-397
- Subject:
- Mauna Kea volcano Geochemistry Trace elements Lava analysis
- Summary:
- Major and trace element data for 39 lavas and radiogenic isotopic data for 8 lavas are analyzed to evaluate the spatial and temporal variations of alkalic cap lavas. Alkalic lavas (MgO less than 4.5 wt.%) capped on Mauna Kea Volcano are dominantly composed of hawaiite with minor mugearite. The hawaiites are nearly homogeneous in radiogenic isotope ratios (Sr, Nd, Pb) and they define coherent major and trace element abundance trends. Crystal segregation along conduit or magma chamber walls is a possible mechanism for explaining compositional variations within these alkalic cap lavas.
- Label:
- Geology
- Date:
- 1988
- Collection:
- Periodicals