Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
doi:10.1016/j.gca.2005.08.007 Constraints on the U-Pb isotopic systematics of Mars inferred from a combined U-Pb,
 

Summary: doi:10.1016/j.gca.2005.08.007
Constraints on the U-Pb isotopic systematics of Mars inferred from a combined U-Pb,
Rb-Sr, and Sm-Nd isotopic study of the Martian meteorite Zagami
LARS E. BORG,1,
* JENNIFER E. EDMUNSON,1
and YEMANE ASMEROM
2
1
Institute of Meteoritics, University of New Mexico, Albuquerque, New Mexico 87131, USA
2
Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131, USA
(Received March 22, 2005; accepted in revised form August 5, 2005)
Abstract--Uranium-lead, Rb-Sr, and Sm-Nd isotopic analyses have been performed on the same whole-rock,
mineral, and leachate fractions of the basaltic martian meteorite Zagami to better constrain the U-Pb isotopic
systematics of martian materials. Although the Rb-Sr and Sm-Nd systems define concordant crystallization
ages of 166 6 Ma and 166 12 Ma, respectively, the U-Pb isotopic system is disturbed. Nevertheless, an
age of 156 6 Ma is derived from the 238
U-206
Pb isotopic system from the purest mineral fractions
(maskelynite and pyroxene). The concordance of these three ages suggest that the 238

  

Source: Asmerom, Yemane - Department of Earth and Planetary Sciences, University of New Mexico

 

Collections: Geosciences