Robert Ayuso and Klaus Schulz Convenors September 14-16, 1992
DEPARTMENT OF THE INTERIOR UNITED STATES GEOLOGICAL SURVEY Informal Notes: WORKSHOP ON THE APPLICATION OF ISOTOPE SYSTEMS TO GEOLOGICAL PROBLEMS Robert Ayuso and Klaus Schulz Convenors September 14-16, 1992 Auditorium National Center Reston, Virginia 22092 Open-File Report 92-525 September 1992 This report is preliminary and has not been edited or reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Any use of trade names is for descriptive purposes only and does not imply endorsement by the uses. List of Titles, Presenters, and Authors Page Introduction 1 Schedule of meeting 3 Innovative uses ofPb isotopic measurements: Dating stromatolites and tracing sand dunes by J. N. Aleinikoff (U.S. Geological Survey, Box 25046, Mail Stop 963, Denver Federal Center, Denver, CO 80225) 7 Pb-Nd-O isotopic compositions of igneous rocks: Implications for petrogenesis and terrane correlation, Cape Breton Island, Nova Scotia, Canada by R. Ayuso (U.S. Geological Survey, 954 National Center, Reston, VA 22092), S. Barr, F. Longstaffe, and E. Hegner 15 The use ofK-Ar and ^Ar/^Ar techniques to date multiple thermal events: An example from the Bayan Obo Fe-Nb-REE ore deposit, China by J. E. Conrad (U.S. Geological Survey, 345 Middlefield Road, Mail Stop 901, Menlo Park, CA 94025) 24 Lead isotopic composition of galena from Malaysia, an S-type granite terrane by B. R. Doe (U.S. Geological Survey, 104 National Center, Reston, VA 22092) 28 Mass spectrometric measurements of234^!/23^ and 230Th/238U and dating late Quaternary carbonates by R. L. Edwards (University of Minnesota, Department of Geology and Geophysics, Minneapolis, MN 55455) 63 Nd isotopes as tracers of the origin and evolution of the continental lithosphere by G.
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