U pb dating

15 Jan

Zircon from the Bishop Tuff (eastern California) was dated by the U-Pb isotope dilution thermal ionization mass spectrometry (ID-TIMS) method to evaluate time scales of magmatic evolution and applicability of the method to rocks younger than 1 Ma.

Along with stratigraphic assumptions, the U-Pb and Th-Pb dating methods have been regarded as the gold standard for “deep-time” dating.Subsequent work has identified the Chicxulub crater as being the site of the bolide event which most closely corresponds in time to the K-T boundary (6) .by Andrew Snelling As with other radiometric ‘dating’ methods, the U-Pb and Pb-Pb isochron methods have been questioned in the open literature, because often an excellent line of best fit between ratios obtained from a set of good cogenetic samples gives a resultant ‘isochron’ and yields a derived ‘age’ that has no geological meaning.The heavens declare the glory of God; and the firmament shows His handiwork.Day unto day utters speech, and night unto night reveals knowledge.