DEEP TimE is what separates geology from all other sciences. This report presents recommendations for improving how we measure time (geochronometry) and use it to understand a broad range of Earth processes (geochronology). This report is drawn from the presentations and discussions held at a workshop prior to the V.

Volume, edited by S. L. Baldwin and G. S. Lister, pp. 13 –14, Geol. Soc. of Am., Boulder, Colo. Black, L. P., S. L. Kamo, C. M. Allen, J. N. Aleinikoff, D. W. Davis, R. J. Korsch, and C. Foudoulis (2003), TEMORA 1: A new zircon standard for Phanerozoic U-Pb geochronology, Chem. Geol.,

Combined Approaches for Characterization of an Uncultivated Magnetotactic coccus from Lake Miyun near Beijing Yongxin Pan a; Wei Lin a; Lanxiang Tian a; Rixiang Zhu a; Nikolai Petersen b a Bio-geomagnetism Group, Paleomagnetism and Geochronology Laboratory (SKL-LE), Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China b Department of Earth and Environmental Science, ...

pheric and Planetary Sciences, Hampton University, Hampton, Virginia 23668, USA ([email protected]). National Institute of Aerospace, Hampton, Virginia 23666, USA. Center for Isotope Cosmochemistry and Geochronology, ARES, NASA-JSC, Houston, TX 77058, USA ([email protected]). Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803, USA (aagwebb@g...

Zircon (ZrSiO4) is the most commonly used mineral in U–Pb geochronology. Although it has proven to be a robust chronometer, it can suffer from Pb-loss or elevated common Pb, both of which impede precision and accuracy of age determinations. Chemical abrasion of zircon involves thermal annealing followed by relatively low temperature partial dissolution in HF acid. It was specifically developed ...

Renne, and R. A. Rohde, Department of Physics, University of California, Berkeley, California 94720, USA, Presently at Chicago Center for Cosmochemistry and Department of Geophysical Sciences, University of Chicago, Chicago, Illinois 60637, USA ([email protected]), Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, Berkeley Geochronology Center, 2455 Ridge Road, B...

LOVERING RIMS RECORD NEBULAR REPROCESSING? J. I. Simon, J. E. P. Matzel, S. B. Simon, P. K. Weber, L. Grossman, D. K. Ross, and I. D. Hutcheon. Center for Isotope Cosmochemistry and Geochronology, KR NASA Johnson Space Center, Houston, TX 77058, USA ([email protected]), Lawrence Livermore National Laboratory, Livermore, CA 94551, USA, The University of Chicago, Chicago, IL 60637, USA, JE-...

Accelerator Mass Spectrometry is a mass spectrometric method of detecting long-lived radioisotopes without regard to their decay products or half-life. The technique is normally applied to geochronology, but is also available for bioanalytical tracing. AMS detects isotope concentrations to parts per quadrillion, quantifying labeled biochemicals to attomole levels in milligram-sized samples. Its...

Abteilung Isotopengeologie, Geowissenschaftliches Zentrum, Georg-August-Universität Göttingen, 37073 Göttingen, Germany; Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, 199034 St. Petersburg, Russia; CAS Key Laboratory of Crustal-Mantle Materials and Environments, School of Earth and Space Science, University of Science and Technology of China, Hefei, 230026, Ch...

Muller, and P. R. Renne, Department of Physics, University of California, Berkeley, California 94720, USA, Presently at Chicago Center for Cosmochemistry and Department of Geophysical Sciences, University of Chicago, Chicago, Illinois 60637, USA ([email protected]), Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, Berkeley Geochronology Center, 2755 Ridge Road, ...