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On Cosmic-Ray Exposure Ages of Terrestrial Rocks: A Suggestion

Published online by Cambridge University Press:  18 July 2016

Devendra Lal
Devendra Lal*
Affiliation:
Scripps Institution of Oceanography, Geosciences Research Division, La Jolla, California 92093-0220 USA
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Abstract

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An important recent development in the field of geomorphology has been the application of in-situ cosmic-ray-produced nuclides to obtain model erosion rates and surface exposure ages. These concepts emerged some four decades ago in studies of cosmogenic nuclides in meteorites, but cannot generally be used analogously for terrestrial rocks. The differences in the two cases are outlined. For the case of steady-state erosional histories, the terrestrial surface exposure ages depend on the half-life of the radionuclide studied. A suggestion is made for presenting the surface exposure ages, which allows a clear definition of the meaning of the estimated exposure ages. In the case of a discrete exposure history, the meaning of “exposure age”—which should more appropriately be called “event age”—is however quite unambiguous.

Type
Articles
Information
Radiocarbon , Volume 37 , Issue 3 , 1995 , pp. 889 - 898
Copyright
Copyright © The American Journal of Science 

References

Bhattacharya, S. K., Goswami, J. N. and Lal, D. 1973 Semi-empirical rates of formation of cosmic ray tracks in spherical objects exposed in space: Pre-atmospheric and post-atmospheric depth profiles. Journal of Geophysical Research 78: 8356–8363.Google Scholar
Bhattacharya, S. K., Imamura, M., Sinha, N. and Bhandari, N. 1980 Depth and size dependence of 53Mn activity in chondrites. Earth and Planetary Science Letters 51: 45–57.Google Scholar
Bierman, P. R., Gillespie, A. R. and Caffee, M. W. 1995 Cosmogenic ages for earthquake recurrence, intervals and debris flow fan deposition, Owens Valley, California. Science 270: 447–450.CrossRefGoogle Scholar
Brook, E. J., Kurz, M. D., Ackert, R. P., Denton, G. H. and Brown, E. T. 1993 Chronology of Taylor Glacier advances in Arena Valley, Antarctica, using in situ cosmogenic 3He and 10Be. Quaternary Research 39: 11–23.Google Scholar
Brown, E. T., Edmond, J. M., Raisbeck, G. M., Yiou, F. and Kurz, M. D. 1991 Examination of surface exposure ages of Antarctic moraines using in situ 10Be and 26Al. Geochimica et Cosmochimica Acta 55: 2269–2283.Google Scholar
Cerling, T. E. and Craig, H. 1994a Geomorphology and in-situ cosmogenic isotopes. Annual Review of Earth and Planetary Sciences 22: 273–277.Google Scholar
Cerling, T. E. and Craig, H. 1994b Cosmogenic 3He production rates from 39° to 46°N latitude, Western USA and France. Geochimica et Cosmochimica Acta 58: 249–255.Google Scholar
Dep, L., Elmore, D., Fabryka-Martin, J. and Reedy, R. C. 1994 Production rate systematics of in-situ produced cosmogenic nuclides in terrestrial rocks: Monte Carlo approach of investigating 35Cl (n,γ)36Cl. Nuclear Instruments and Methods in Physics Research B92: 321–325.Google Scholar
Geiss, J., Oeschger, H. and Signer, P. 1960 Radiation ages of chondrites. Zeitschrift für Naturforschung 15A: 1016–1017.Google Scholar
Gillespie, A. R. and Bierman, P. R. 1995 Precision of terrestrial exposure ages and erosion rates estimated from analysis of cosmogenic isotopes produced in situ. Journal of Geophysical Research 100(B12): 24,637–24,649.Google Scholar
Gosse, J. C., Klein, J., Evenson, E. B., Lawn, B. and Middleton, R. 1995 Beryllium-10 dating of the duration and retreat of the last Pinedale Glacial sequence. Science 268: 1329–1333.Google Scholar
Kurz, M. D., Colodner, D., Trull, T. W., Moore, R. B. and O'Brien, K. 1990 Cosmic ray exposure dating with in situ produced cosmogenic 3He: Results from young Hawaiian lava flows. Earth and Planetary Science Letters 97: 177–189.Google Scholar
Lal, D. 1972 Hard rock cosmic ray archaeology. Space Science Reviews 14: 3–102.Google Scholar
Lal, D. 1987 Production of 3He in terrestrial rocks. Chemical Geology 66: 89–98.Google Scholar
Lal, D. 1988 In situ-produced cosmogenic isotopes in terrestrial rocks. Annual Review of Earth and Planetary Science 16: 355–388.Google Scholar
Lal, D. 1991 Cosmic ray tagging of erosion surfaces: in situ nuclide production rates and erosion models. Earth and Planetary Science Letters 104: 424–439.Google Scholar
Macchiaroli, P. E. 1995 Revolving aspects of past galciations by dating exposed rock surfaces using 26Al and 10Be produced in situ: Wright Valley, Southern Victoria Land, Antarctica and the southeasternmost ridge of the Appalachian Mountains. Ph.D. dissertation, University of Pennsylvania.Google Scholar
Marti, K. and Graf, T. 1992 Cosmic ray exposure history of ordinary chondrites. Annual Review of Earth and Planetary Science 20: 221–243.Google Scholar
Nishiizumi, K., Lal, D., Klein, J., Middleton, R. and Arnold, J. R. 1986 Production of 10Be and 26Al by cosmic ray in terrestrial quartz in situ and implications for erosion rates. Nature 319: 134–136.Google Scholar
Nishiizumi, K., Kohl, C. P., Arnold, J. R., Dora, R., Klein, J., Fink, D., Middleton, R. and Lal, D. 1993 Role of in-situ cosmogenic nuclides 10Be and 26Al in the study of diverse geomorphic processes. Earth Surface Processes and Landforms 18: 407–425.Google Scholar
Nishiizumi, K., Kohl, C. P., Arnold, J. R., Klein, J., Fink, D. and Middleton, R. 1991 Cosmic ray produced 10Be and 26Al in Antarctic rocks: exposure and erosion history. Earth and Planetary Science Letters 104: 440–454.Google Scholar
Phillips, F. M., Leavy, B. D., Jannik, N. O., Elmore, D. and Kubik, P. W. 1986 The accumulation of cosmogenic chlorine-36 in rocks: A method for surface exposure dating. Science 231: 41–43.Google Scholar
Reedy, R. C. 1981 Cosmic-ray-produced stable nuclides: various production rates and their implications. Proceedings of Lunar and Planetary Science 12B: 1809–1823.Google Scholar
Stone, J., Allan, G. L., Tifield, L. K., Evans, J. M. and Chivas, A. R. 1994 Limestone erosion measurements with cosmogenic chlorine-36 in calcite; preliminary results from Australia. Nuclear Instruments and Methods in Physics Research B92: 311–316.Google Scholar