U-series isochron dating: A generalized method employing total-sample dissolution

Shangde Luo, Teh Lung Ku

研究成果: Article同行評審

156 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)555-564
頁數10
期刊Geochimica et Cosmochimica Acta
55
發行號2
DOIs
出版狀態Published - 1991 二月

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology

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