| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6437643 | Geochimica et Cosmochimica Acta | 2016 | 20 Pages |
Abstract
The 53Mn-53Cr ages of secondary fayalites (Fa90-100) in the Elephant Moraine (EET) 90161 (L3.05), Vicencia (LL3.2), Asuka 881317 (CV3) and MacAlpine Hills (MAC) 88107 (C3) chondrites (2.4-1.3+1.8, 4.0-1.1+1.4, 4.2-0.7+0.8 and 5.1-0.4+0.5Â Myrs after CV CAIs, respectively) are â¼3Â Myr older when using an RSF measured on a matrix-matched (Fa99) standard, rather than on a San Carlos olivine. The inferred 53Mn-53Cr ages of fayalite formation are consistent with the ages reported for calcites in CM chondrites measured with similarly matrix-matched standards, suggesting an early onset of aqueous alteration on the ordinary and carbonaceous chondrite parent bodies heated by decay of 26Al.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Patricia M. Doyle, Kaori Jogo, Kazuhide Nagashima, Gary R. Huss, Alexander N. Krot,