Major- and trace-element geochemistry of basalts from Ojin, Nintoku, and Suiko seamounts of the Emperor Seamount chain; DSDP-IPOD Leg 55

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doi: 10.2973/dsdp.proc.55.124.1980
Author(s): Bence, A. E.; Taylor, S. R.; Fisk, M.
Author Affiliation(s): Primary:
State Univ. N.Y., Earth and Space Sci. Dep., Stony Brook, NY, United States
Volume Title: Initial reports of the Deep Sea Drilling Project covering Leg 55 of the cruises of the drilling vessel Glomar Challenger, Honolulu, Hawaii to Yokohama, Japan; July-September 1977
Volume Author(s): Shambach, James, editor; Jackson, Everett Dale; Koizumi, Itaru; Avdeiko, Gennady; Butt, Arif; Clague, David; Dalrymple, G. Brent; Greene, H. Gary; Karpoff, Anne Marie; Kirkpatrick, R. James; Kono, Masaru; Hsin Yi Ling; McKenzie, Judith; Morgan, Jason; Takayama, Toshiaki
Source: Initial reports of the Deep Sea Drilling Project covering Leg 55 of the cruises of the drilling vessel Glomar Challenger, Honolulu, Hawaii to Yokohama, Japan; July-September 1977, James Shambach, Everett Dale Jackson, Itaru Koizumi, Gennady Avdeiko, Arif Butt, David Clague, G. Brent Dalrymple, H. Gary Greene, Anne Marie Karpoff, R. James Kirkpatrick, Masaru Kono, Hsin Yi Ling, Judith McKenzie, Jason Morgan and Toshiaki Takayama. Initial Reports of the Deep Sea Drilling Project, Vol.55, p.599-605. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0080-8334 CODEN: IDSDA6
Note: In English. 13 refs.; illus. incl. tables
Summary: Alkali series and tholeiitic basalts from Ojin, Nintoku, and Suiko Seamounts of the Emperor Seamount chain are very similar in their major and LIL (large-ion lithophile) trace-element chemistry to the alkaline and tholeiitic basalts erupted on the island of Hawaii. They are characterized by high total content of alkalis, high TiO2 and "FeO" contents, low Al2O3 contents, and low Mg/(Mg + Fe2+) relative to mid-ocean ridge basalts (MORBs). LIL element abundances in one tholeiite from Ojin Seamount are enriched by factors of 5 to 10 relative to MORBs. REE (rare-earth element) patterns in all the samples are highly fractionated; the heavy rare-earth elements (HREE) are depleted markedly. This is consistent with residual garnet in the source regions. LIL element variations among the seamount basalts suggest variable degrees of partial melting. Olivine fractionation, presumably in a shallow magma chamber, accounts for some of the intra-site major-element compositional variations. There are no systematic differences between the seamount basalts and those from the island of Hawaii that might be attributed to the temporal evolution of a single hot-spot source.
Year of Publication: 1980
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 02 Geochemistry; Alkalic composition; Basalts; Chemical composition; Deep Sea Drilling Project; Emperor Seamounts; Geochemistry; Hot spots; IPOD; Igneous rocks; Leg 55; Major elements; Metals; North Pacific; Northwest Pacific; Pacific Ocean; Petrology; Rare earths; Seamounts; Site 430; Site 432; Site 433; Tholeiites; Trace elements; Volcanic rocks; West Pacific
Coordinates: N350000 N500000 E1750000 E1600000
Record ID: 1981027018
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from U. S. Geological Survey, Hawaiian Volcano Observatory, United States