Lack of relationship between 26Al ages of chondrules and their mineralogical and chemical compositions Absence de relation entre les âges 26Al de cristallisation des chondres et leurs compositions minéralogiques et chimiques - Archive ouverte HAL Access content directly
Journal Articles Comptes Rendus Géoscience Year : 2012

Lack of relationship between 26Al ages of chondrules and their mineralogical and chemical compositions Absence de relation entre les âges 26Al de cristallisation des chondres et leurs compositions minéralogiques et chimiques

(1, 2) , (2) , (2, 3)
1
2
3

Abstract

Previous studies have suggested the existence of a correlation between 26Al relative crystallisation ages and mineralogical and bulk chemical compositions of ferromagnesian chondrules from the Bishunpur and Semarkona unequilibrated ordinary ( [Mostefaoui et al., 2002] and [Tachibana et al., 2003]). However, because the precision in 26Al ages was moderate, these correlations are questionable. Here, we report mineralogical and chemical compositions of 14 ferromagnesian chondrules from Semarkona for which precise 26Al ages were previously obtained (Villeneuve et al., 2009). We find global correlation of 26Al ages neither with bulk chemical composition of chondrules, nor with the different types of ferromagnesian chondrules, i.e. PO, POP and PP. This indicates that if some kind of correlations between chemical compositions of chondrules and their ages of formation exists, they do not exist at timescales that can be measured with the 26Al-26Mg systematics but presumably at much shorter timescales.
Fichier principal
Vignette du fichier
Text-accepted.pdf (1.19 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

insu-00732944 , version 1 (30-10-2012)

Identifiers

Cite

Johan Villeneuve, Marc Chaussidon, Guy Libourel. Lack of relationship between 26Al ages of chondrules and their mineralogical and chemical compositions Absence de relation entre les âges 26Al de cristallisation des chondres et leurs compositions minéralogiques et chimiques. Comptes Rendus Géoscience, 2012, 344 (9), pp.423-431. ⟨10.1016/j.crte.2012.07.005⟩. ⟨insu-00732944⟩
174 View
152 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More