By:

David A. Clague and G. Brent Dalrymple

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Abstract

KAr ages obtained by the conventional isotope-dilution and the ⁴⁰Ar/³⁹Ar techniques on two sanidine trachytes, four basalts, and a phonolite dredged from the top of Ko¯ko Seamount, 300 km north of the Hawaiian-Emperor bend, show that the seamount is 46.4 ± 1.1 my old. These data indicate that the volcanoes in the Hawaiian-Emperor chain continue to increase in age to the west and north beyond Midway Atoll, as predicted by the melting-spot hypothesis for the origin of the chain, and that the rate of volcanic migration along the chain was nonlinear between the time of formation of the island of Hawaii and Ko¯ko Seamount.

Additional publication details

Publication type:

Article

Publication Subtype:

Journal Article

Title:

Age of Kōko Seamount, Emperor Seamount chain

Series title:

Earth and Planetary Science Letters

DOI:

10.1016/0012-821X(73)90209-4

Volume:

17

Issue:

2

Year Published:

1973

Language:

English

Publisher:

Elsevier

Description:

5 p.

First page:

411

Last page:

415

Online Only (Y/N):

N

Additional Online Files (Y/N):

N