Use of surface-controlled REE sectoral zoning in apatite from Llallagua, Bolivia, to determine a single-crystal SmNd age

Details Use of surface-controlled REE sectoral zoning in apatite from Llallagua, Bolivia, to determine a single-crystal SmNd age Use of surface-controlled REE sectoral zoning in apatite from Llallagua, Bolivia, to determine a single-crystal SmNd age

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997e%26psl.146..329r&link_type=abstract

Earth and Planetary Science Letters, Volume 146, Issue 1, p. 329-336.

Other

4

Scientific paper

Surface-structure controlled partitioning of REEs between symmetrically nonequivalent crystal faces leads to sectoral zoning between the {0001} and {101¯0} sectors of vein-filling apatites from Llallagua, Bolivia. Absolute differences in the concentration of the analyzed REEs between these sectors range from a factor of 9.5 in the case of La to a factor of 1.4 for Yb. The two sectors have different concentrations of Sm and Nd as well as significantly different Sm/Nd ratios ( Δ147Sm/144Nd= 0.3558). A SmNd isochron determined from petrographically constrained coeval portions of different sectors gives an age of 43.8 ± 4.7 Ma (95% confidence limits). We believe that this calculated age represents the time of crystallization of the apatite.The application of intracrystalline heterogeneities, that formed due to differential partitioning at the crystal surface, to dating of minerals is germane for any mineral in which sectoral or intrasectoral zoning is exhibited, and may be used with other isotopic systems in which sufficient segregation of parent and daughter nuclides occurs and in which concentrations are sufficient for analysis of small intracrystalline samples.

Affiliated with

Also associated with

No associations

Rating

Use of surface-controlled REE sectoral zoning in apatite from Llallagua, Bolivia, to determine a single-crystal SmNd age 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 Use of surface-controlled REE sectoral zoning in apatite from Llallagua, Bolivia, to determine a single-crystal SmNd age, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Use of surface-controlled REE sectoral zoning in apatite from Llallagua, Bolivia, to determine a single-crystal SmNd age will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1787570