40Ar-39Ar age determinations on the Owyhee basalt of the Columbia Plateau

Details 40Ar-39Ar age determinations on the Owyhee basalt of the Columbia Plateau 40Ar-39Ar age determinations on the Owyhee basalt of the Columbia Plateau

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976e%26psl..31...75b&link_type=abstract

Earth and Planetary Science Letters, Volume 31, Issue 1, p. 75-84.

Computer Science

9

Scientific paper

40Ar/39Ar step-heating analyses have been performed on 11 samples of basalt from sites near Owyhee Reservoir of southeastern Oregon, U.S.A. These rocks were extruded during the great flood basalt episode of the Pacific Northwest. The whole-rock points are highly correlated on a plot of 40Ar/36Ar versus 39Ar/36Ar, corresponding to a common age of the samples of 14.3 +/- 0.3 m.y. Inspite of this, individual ``plateau'' plots of the age versus fraction of 39Ar released do not give good plateaux. These age spectra exhibit to varying degrees a common structure in which lower age values are found at higher temperatures. This pattern may result from a closed-system redistribution of the argon isotopes. The usefulness of grinding the basalts in removing a loosely held atmospheric argon component is confirmed.

Affiliated with

Also associated with

No associations

Rating

40Ar-39Ar age determinations on the Owyhee basalt of the Columbia Plateau does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with 40Ar-39Ar age determinations on the Owyhee basalt of the Columbia Plateau, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 40Ar-39Ar age determinations on the Owyhee basalt of the Columbia Plateau will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1783726