Physics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.1141s&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 50, Issue 6, pp.1141-1146
Physics
8
Scientific paper
Sm-Nd, Rb-Sr and K-Ar isotope analyses were made on argillaceous sediments from the Gunflint Iron Formation in the Lake Superior region, in order to provide new information on their sedimentation age and evolutionary history. The investigations indicate that it might be possible to date the time of sedimentation by the Sm-Nd method by studying specific material, such as argillaceous whole-rocks enriched in organic matter and clay fractions. The spread in the Sm-Nd ratios seems here to have been favoured by the incorporation of organic material in the argillites. The Sm-Nd isotope data yield an isochron age of 2.08 ± 0.25 Ga , which seems to be a fair estimation of deposition age. Model calculations indicate that the main source supplying the Animikie seawater with REE was located at the northern border of the basin. The argillites and their clay minerals did not behave as closed systems with regard to the Rb-Sr and K-Ar systems during further diagenetic evolution.
Clauer Norbert
Stille Peter
No associations
LandOfFree
Sm-Nd isochron-age and provenance of the argillites of the Gunflint Iron Formation in Ontario, Canada 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 Sm-Nd isochron-age and provenance of the argillites of the Gunflint Iron Formation in Ontario, Canada, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sm-Nd isochron-age and provenance of the argillites of the Gunflint Iron Formation in Ontario, Canada will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1832579