Statistics – Applications
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55..555l&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 55, Issue 2, pp.555-564
Statistics
Applications
15
Scientific paper
The age of a sedimentary deposit can be determined by measuring 238 U, 234 U, 232 Th, and 230 Th in two or more samples of the deposit, with the requirement that these samples have different U/Th ratios but an identical 230 Th / 232 Th 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.
Ku Teh-Lung
Luo Shangde
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