Oldest reliable Ar-40/Ar-39 ages for terrestrial rocks Barberton Mountain komatiites

Details Oldest reliable Ar-40/Ar-39 ages for terrestrial rocks Barberton Mountain komatiites Oldest reliable Ar-40/Ar-39 ages for terrestrial rocks Barberton Mountain komatiites

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.307..352l&link_type=abstract

Nature (ISSN 0028-0836), vol. 307, Jan. 26, 1984, p. 352-354. Research supported by the Natural Science and Engineering Research

Physics

11

Argon Isotopes, Basalt, Geochemistry, Geochronology, Calcium, Half Life, Potassium, Radioactive Age Determination

Scientific paper

The first Ar-40/Ar-39 ages for komatiites and komatiitic basalts from the Barberton Mountain Greenstone Belt on the Transvaal-Swaziland border in southern Africa are reported. Both rock types display remarkable argon retentivity. While some variation is found among the samples, the best argon age estimate for the time of metamorphism is in the 3450-3490 Myr range. This age is only slightly less than that found in komatiites from the same area by Sm-Nd dating. The results show that the principal pervasive greenschist metamorphism in the area must have occurred within 100 Myr of the eruption of the komatiite. These results represent by far the oldest reliable ages obtained for terrestrial rocks using the K-Ar system.

Affiliated with

Also associated with

No associations

Rating

Oldest reliable Ar-40/Ar-39 ages for terrestrial rocks Barberton Mountain komatiites 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 Oldest reliable Ar-40/Ar-39 ages for terrestrial rocks Barberton Mountain komatiites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oldest reliable Ar-40/Ar-39 ages for terrestrial rocks Barberton Mountain komatiites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-937796