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Dalrymple, G Brent; Lanphere, Marvin A; Natland, James H (1980): Geochemistry and ages at DSDP Hole 19-192A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.823432, Supplement to: Dalrymple, GB et al. (1980): K-Ar minimum age for Meiji Guyot, Emperor Seamount Chain. In: Jackson, ED; Koisumi, I; et al., (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 55, 677-683, https://doi.org/10.2973/dsdp.proc.55.129.1980

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Abstract:
Conventional K-Ar and 40Ar/39Ar age data on altered basalts from DSDP Hole 192A on Meiji Guyot, Emperor Seamount chain, indicate a minimum age for the volcano of 61.9 ± 5.0 m.y. The K-Ar data are consistent with the early Maestrichtian date of the overlying sediments, but do not provide either a positive or negative test of the hypothesis that Meiji is older than Emperor volcanoes to the south. The most prominent alteration affecting the age measurements is potassium metasomatism, particularly of feldspar phenocrysts. The K-Ar apparent ages of feldspar separates from the Meiji basalts show that more than half of the potassium metasomatism occurred within the last 25 m.y. or so, and that if the potassium replacement rate has been constant, then the alteration of the Meiji basalts did not begin for 10 to 20 m.y. after the volcano formed.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 53.009500 * Longitude: 164.713500
Date/Time Start: 1971-08-30T00:00:00 * Date/Time End: 1971-08-30T00:00:00
Event(s):
19-192A * Latitude: 53.009500 * Longitude: 164.713500 * Date/Time: 1971-08-30T00:00:00 * Elevation: -3014.0 m * Penetration: 1057 m * Recovery: 37.7 m * Location: North Pacific/GUYOT * Campaign: Leg19 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 47 m cored; 0 m drilled; 80.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Dalrymple, GB; Lanphere, MA; Natland, JH (1980): (Table 2) Total fusion K-Ar age on basalt and feldspar at DSDP Hole 19-192A. https://doi.org/10.1594/PANGAEA.823431
  2. Dalrymple, GB; Lanphere, MA; Natland, JH (1980): (Table 1) Chemical analyses of basalt from DSDP Hole 19-192A. https://doi.org/10.1594/PANGAEA.823430