title: Chondrites: initial strontium-87/strontium-86 ratios and the early history of the solar system.
abstract: A sodium-poor, calcium-rich inclusion in the carbonaceous chondrite Allende had a (87)Sr/(86)Sr ratio at the time of its formation of 0.69880, as low a value as that found in any other meteorite. The higher (87)Sr/(86)Sr ratios found in ordinary chondrites indicate that their formation or isotopic equilibration occurred tens of millions of years later.
authors.forename: G W
authors.initials: GW
authors.lastname: Wetherill
authors.forename: R
authors.initials: R
authors.lastname: Mark
authors.forename: C
authors.initials: C
authors.lastname: Lee-Hu