Calcium-41 concentration in terrestrial materials: prospects for dating of pleistocene samples.
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.
Henning
W
W
Bell
W A
WA
Billquist
P J
PJ
Glagola
B G
BG
Kutschera
W
W
Liu
Z
Z
Lucas
H F
HF
Paul
M
M
Rehm
K E
KE
Yntema
J L
JL