First direct radiometric dating of Archaean stromatolitic limestone

Details First direct radiometric dating of Archaean stromatolitic limestone First direct radiometric dating of Archaean stromatolitic limestone

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.326..865m&link_type=abstract

Nature (ISSN 0028-0836), vol. 326, April 30, 1987, p. 865-867.

Physics

24

Carbonates, Limestone, Petrology, Radioactive Age Determination, Lead Isotopes, Rubidium Isotopes, Strontium Isotopes, Zimbabwe

Scientific paper

The first direct dating of the depositional age of a sedimentary carbonate rock using long-lived radioactive decay schemes is reported. The Mushandike stromatolitic limestone, from the Masvingo greenstone belt of southern Zimbabwe, yields a Pb/Pb isochron age of 2839 + or - 33 Myr. New Rb-Sr and Pb/Pb isotope data for the Mushandike granite indicate a probable emplacement age of about 2900 Myr, and new field evidence suggests that the granite forms part of the basement on which the limestone was deposited. The new dates do not support an age of about 3.5 Gyr for the algal stromatolites at Mushandike. The Pb/Pb isochron method may have wide applicability to dating the time of deposition of Precambrian fossiliferous and unfossiliferous limestones, and thus to the problem of the antiquity of life.

Affiliated with

Also associated with

No associations

Rating

First direct radiometric dating of Archaean stromatolitic limestone 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 First direct radiometric dating of Archaean stromatolitic limestone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First direct radiometric dating of Archaean stromatolitic limestone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1349398