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Lanphere & Craig 1983

Lanphere, M.A. and Craig, H. (1983). (super 87) Sr/ (super 86) Sr ratios for basalt from Loihi Seamount, Hawaii. Earth and Planetary Science Letters 66: 380-387.

(super 87) Sr/ (super 86) Sr ratios of 15 samples of basalt dredged from Loihi Seamount range from 0.70334 to 0.70368. The basalt types range from tholeiite to basanite in composition and can be divided into six groups on the basis of abundances of K2O and Na2O. Rb and Sr and (super 87) Sr/ (super 86) Sr ratio. The isotopic data require that the various basalt types be derived from source regions differing in Sr isotopic composition. The Loihi basalts may be produced by mixing of isotopically distinct sources but the tholeiites and alkalic basalts from Loihi do not show a well-developed inverse trend between Rb/Sr and (super 87) Sr/ (super 86) Sr that is characteristic of the later stages of Hawaiian volcanoes such as Haleakala and Koolau.

Keywords
alkaline earth metals; basalts; classification; East Pacific; East, Pacific Ocean Islands; geochemistry; Hawaii; igneous rocks;, isotopes; lava; Loihi Seamount; metals; North Pacific; Northeast, Pacific; ocean floors; Oceania; oceanography; Pacific Ocean;, petrology; Polynesia; ratios; seamounts; Sr-87/Sr-86; stable, isotopes; strontium; United States; volcanic rocks; volcanism;, volcanology, 05A Igneous and metamorphic petrology; 02D Isotope geochemistry

Journal
Earth and Planetary Science Letters
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Publisher
Elsevier Science
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