Planetary Science Research Discoveries

HOT IDEAposted September 25, 2002

chondrules

Dating the Earliest Solids in our Solar System

--- Lead isotopic analyses give absolute formation ages of Ca-Al-rich inclusions and chondrules.

Written by Alexander N. Krot
Hawai'i Institute of Geophysics and Planetology


Technical References List

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Amelin Y., Krot A. N., Hutcheon I. D., and Ulyanov A. A. (2002) Lead isotopic ages of chondrules and calcium-aluminum-rich inclusions. Science 297, 1678-1683.

Desch S. J. and Connolly H, C., Jr. (2002) A model of the thermal processing of particles in solar nebula shocks: Application to the cooling rates of chondrules. Meteorit. Planet. Sci. 37, 183-209.

Göpel C., Manhés G., and Allégre C. J. (1991) Constraints on the time of accretion and thermal evolution of chondrite parent bodies by precise U-Pb dating of phosphates. Meteoritics 26, 338.

Gounelle M., Shu F., Shang H., Glassgold A., Rehm E., and Lee T. (2001) Extinct radioactivities and protosolar cosmic-rays: Self-shielding and light elements. Astrophys. J. 548, 1051.

Goswami J. N. and Vanhala H. A. T. (2000) Short-lived nuclides in the early solar system: Meteoritic evidence and plausible sources. In Protostars and Planets IV, (eds. Mannings M., Boss A. P., Russell S. S.), University of Arizona Press, Tucson, 963-995.

MacPherson G. J., Davis A. M. and Zinner E. K. (1995) The distribution of aluminum-26 in the early solar system: A reappraisal. Meteoritics 30, 365-386.

Marhas K. K., Hutcheon I. D., Krot A. N., and Goswami J. N. (2000) 26Al in carbonaceous chondrite chondrules (abstract). Meteorit. Planet. Sci. 35, A102.

Marhas K. K., Krot A. N., and Goswami J. N. (2001) Al-Mg isotopic systematics in CAIs from CR chondrites (abstract). Meteorit. Planet. Sci. 36, A121-A122.

Shu F. H., Shang H., and Lee T. (1996) Toward an astrophysical theory of chondrites. Science 271, 1545-1552.

Zinner E. and Göpel C. (2002) Aluminum-26 in H4 chondrites: implications for its production and its usefulness as a fine-scale chronometer for early-solar-system events. Met. & Planet. Sci., v. 37, p. 1001-1013.

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