title: Calcium-41 concentration in terrestrial materials: prospects for dating of pleistocene samples.
abstract: Calcium-41 has been suggested as a new tool for radiometric dating in the range of 10(5) to 10(6) years. The concentration of cosmogenic calcium-41 in natural samples of terrestrial origin has now been determined by high-sensitivity accelerator mass spectrometry after pre-enrichment in calcium-41 with an isotope separator. Ratios of calcium-41 to total calcium between 2 x 10(-14) and 3 x 10(-15) were measured for samples of contemporary bovine bone and from limestone deposits. Some prospects for the use of calcium-41 for dating Middle and Late Pleistocene bone and for other geophysical applications are discussed.
authors.forename: W
authors.initials: W
authors.lastname: Henning
authors.forename: W A
authors.initials: WA
authors.lastname: Bell
authors.forename: P J
authors.initials: PJ
authors.lastname: Billquist
authors.forename: B G
authors.initials: BG
authors.lastname: Glagola
authors.forename: W
authors.initials: W
authors.lastname: Kutschera
authors.forename: Z
authors.initials: Z
authors.lastname: Liu
authors.forename: H F
authors.initials: HF
authors.lastname: Lucas
authors.forename: M
authors.initials: M
authors.lastname: Paul
authors.forename: K E
authors.initials: KE
authors.lastname: Rehm
authors.forename: J L
authors.initials: JL
authors.lastname: Yntema