In-situ AMS determination of Re-Os isochron in IIA iron meteorites

Details In-situ AMS determination of Re-Os isochron in IIA iron meteorites In-situ AMS determination of Re-Os isochron in IIA iron meteorites

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nimpb.123..424d&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section B, v. 123, p. 424-430.

Physics

Elsevier: Accelerator Mass Spectrometry, Materials Analysis, Iron Meteorites, Rhenium, Osmium, Os Isotopes

Scientific paper

Accelerator Mass Spectrometry (AMS) has been applied to determine Re-Os isochrons for the Ni-Fe phases of a set of iron meteorites with emphasis on group IIA. The method requires no chemical sample treatment and permits in-situ analysis of the Re-Os systematics of materials at sub-mm scales. The fitted isochron of IIA irons corresponds to an age of 4.70+/-0.31 Ga, consistent with the latest reported IIA ages of 4.584+/-0.043 Ga and 4.61+/-0.01 Ga obtained by conventional whole-rock methods. Heterogeneous e/187Re/188Os ratios have been detected in the metallic phases of Lombard and Boguslavka. Those two samples do not lie on the determined isochron and this observation is considered to be due to the effects of redistribution of Re and Os in minor phases contained in Ni-Fe alloys. Practical detection limits for Re and Os are estimated to be 54 and 0.5 ppb, respectively. It is shown that in-situ AMS has the capability to give an internal Re-Os isochron for iron meteorites. It also provides a convenient and sensitive tool to study Re-Os systematics in broader applications.

Affiliated with

Also associated with

No associations

Rating

In-situ AMS determination of Re-Os isochron in IIA iron meteorites 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 In-situ AMS determination of Re-Os isochron in IIA iron meteorites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In-situ AMS determination of Re-Os isochron in IIA iron meteorites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-875653