TY - JOUR
T1 - U-series isochron dating
T2 - A generalized method employing total-sample dissolution
AU - Luo, Shangde
AU - Ku, Teh Lung
PY - 1991/2
Y1 - 1991/2
N2 - The age of a sedimentary deposit can be determined by measuring 238U, 234U, 232Th, and 230Th in two or more samples of the deposit, with the requirement that these samples have different U/Th ratios but an identical 230Th 232Th ratio when deposited. This paper presents the theoretical and experimental aspects of the dating method. The latter involves techniques for securing samples of varied U/ Th ratios from the same deposit, plotting isochrons of the radiochemical data (obtained on totally dissolved samples) for age analysis, and estimating the errors involved. Although applications to impure carbonates and lacustrine evaporite sediments are given as examples in this paper, the method potentially can be generalized for dating a variety of authigenic deposits such as rock varnish, peat, opal, sulfate minerals, and marine phosphorites.
AB - The age of a sedimentary deposit can be determined by measuring 238U, 234U, 232Th, and 230Th in two or more samples of the deposit, with the requirement that these samples have different U/Th ratios but an identical 230Th 232Th ratio when deposited. This paper presents the theoretical and experimental aspects of the dating method. The latter involves techniques for securing samples of varied U/ Th ratios from the same deposit, plotting isochrons of the radiochemical data (obtained on totally dissolved samples) for age analysis, and estimating the errors involved. Although applications to impure carbonates and lacustrine evaporite sediments are given as examples in this paper, the method potentially can be generalized for dating a variety of authigenic deposits such as rock varnish, peat, opal, sulfate minerals, and marine phosphorites.
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U2 - 10.1016/0016-7037(91)90012-T
DO - 10.1016/0016-7037(91)90012-T
M3 - Article
AN - SCOPUS:0025990381
SN - 0016-7037
VL - 55
SP - 555
EP - 564
JO - Geochimica et Cosmochimica Acta
JF - Geochimica et Cosmochimica Acta
IS - 2
ER -
