Partial melting below Tubuai (Austral Islands, French Polynesia)
Article Abstract:
A study was conducted on the proposal that the Tubuai lava suite was produced by a two-stage partial melting procedure. Trace element data used in identification charts proved that various amounts of partial melting of an isotopically uniform mantle origin produced mafic lavas in Tubuai. Results also indicated that decreasing levels of partial melting, based on time-related silica-undersaturation, isotopic homogeneity, and the variations of the regularity of major and trace elements caused the gradual development of Tubuai mafic lavas.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1997
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Cross-arc geochemical variations in volcanic fields in Honduras C.A.: Progressive changes in source with distance from the volcanic front
Article Abstract:
Honduras lacks historically active volcanic centers, therefore volcanological studies are scarce. However the region is useful to study geochemical variations across a continental arc, due to the distribution of volcanic fields from the Pacific coast to the Caribbean Sea. The geochemistry of the Zacate Grande, Tegucigalpa and Lake Yojoa volcanic fields has been studied, to infer the nature of the mantle from where the lavas originated, and to determine the involvement of certain mantle components.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1997
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Isotopic constraints on the Easter Seamount Chain source
Article Abstract:
A study on the Easter Seamount Chain (ESC) revealed new Sr, Nd and Pb isotope data for lava samples from Easter Island, Salas y Gomez Island and nine seamounts lying along the ESC east of these islands. The isotopes were found to display a behavior that is similar to the binary mixing between a MORB source and a more enriched mantle. Results also suggested that the plume source may have maintained the same isotopic composition over 20 to 30 Ma.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1999
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