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Published December 15, 2000 | public
Journal Article

Helium chronometry of apatite and titanite using Nd-YAG laser heating

Abstract

We developed a technique for extracting ^4He from apatite and titanite using laser heating that permits measurement of U and Th and, hence, (U–Th)/He ages, on a single sample aliquot. Unlike direct laser heating, quantitative He extraction and U, Th retention can be achieved when samples are indirectly laser heated to temperatures below their melting point. Resulting He ages are consistent with those obtained from conventional furnace heating of larger samples. The major advantages of this technique include faster analysis and far lower, more reproducible He blanks that permit single crystal analyses. Single crystal dating opens a variety of new avenues for (U–Th)/He chronometry.

Additional Information

© 2000 Elsevier Science B.V. Received 8 August 2000; received in revised form 25 September 2000; accepted 27 September 2000. This work was supported by the National Science Foundation and a fellowship to K.A.F. from the David and Lucille Packard Foundation. Helpful reviews by C. Hall and an anonymous reviewer improved the manuscript.[RV].

Additional details

Created:
August 22, 2023
Modified:
October 20, 2023