Conventional and 40Ar/39Ar K-Ar ages of volcanic rocks from Ojin (Site 430), Nintoku (Site 432), and Suiko (Site 433) seamounts and the chronology of volcanic propagation along the Hawaiian-Emperor chain

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doi: 10.2973/dsdp.proc.55.128.1980
Author(s): Dalrymple, G. Brent; Lanphere, Marvin A.; Clague, David A.
Author Affiliation(s): Primary:
U. S. Geol. Surv., Menlo Park, CA, United States
Other:
Middlebury Coll., Geol. Dep., Middlebury, VT, 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.659-676. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0080-8334 CODEN: IDSDA6
Note: In English. 92 refs.; illus. incl. chart, tables, sketch map
Summary: Conventional K-Ar, 40Ar/39Ar total fusion, and 40Ar/39Ar incremental heating data on hawaiite and tholeiitic basalt samples from Ojin (Site 430), alkalic basalt samples from Nintoku (Site 432), and alkalic and tholeiitic basalt samples from Suiko (Site 433) seamounts in the Emperor Seamount chain give the following best ages for these volcanoes: Ojin = 55.2 ± 0.7 m.y., Nintoku = 56.2 ± 0.6 m.y., and Suiko = 64.7 ± 1.1 m.y. These new data bring to 27 the number of dated volcanoes in the Hawaiian-Emperor volcanic chain. The new dates prove that the age progression from Kilauea Volcano on Hawaii (0 m.y.) through the Hawaiian-Emperor bend (∼43 m.y.) to Koko Seamount (48.1 m.y.) in the southernmost Emperor Seamounts continues more than halfway up the Emperor chain to Suiko Seamount. The age versus distance data for the Hawaiian-Emperor chain are consistent with the kinematic hot-spot hypothesis, which predicts that the volcanoes are progressively older west and north away from the active volcanoes of Kilauea and Mauna Loa. The data are consistent with an average volcanic propagation velocity of either 8 cm/year from Suiko to Kilauea or of 6 cm/year from Suiko to Midway followed by a velocity of 9 cm/year from Midway to Kilauea, but it appears that the change in direction that formed the Hawaiian Emperor bend probably was not accompanied by a major change in velocity.
Year of Publication: 1980
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 03 Geochronology; Absolute age; Age; Ar-40/Ar-39; Ar/Ar; Argon; Basalts; Cenozoic; Composition; Dates; Deep Sea Drilling Project; Emperor Seamounts; Geochronology; IPOD; Igneous rocks; Isotopes; K/Ar; Leg 55; Mineral composition; Noble gases; North Pacific; Northwest Pacific; Pacific Ocean; Radioactive isotopes; Site 430; Site 432; Site 433; Stable isotopes; Volcanic rocks; West Pacific
Coordinates: N350000 N500000 E1750000 E1600000
Record ID: 1981027022
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from U. S. Geological Survey, Hawaiian Volcano Observatory, United States