[meteorite-list] New Shatter Cone Paper

From: Paul <lenticulina1_at_meteoritecentral.com>
Date: Thu Apr 22 10:27:46 2004
Message-ID: <20031109181649.29108.qmail_at_web21407.mail.yahoo.com>

There is a new paper about the origin of shatter
cones, which has been published. It is:

Baratoux, D., and Melosh, H.J., 2003, The formation
of shatter cones by shock wave interference during
impacting. Earth and Planetary Science Letters.
v. 216, no. 1-2, pp. 43-54 (15 November 2003)

In part, the abstract stated:

"The model follows earlier suggestions that shatter
cones are initiated by heterogeneities in the rock,
but does not require the participation of an elastic
precursor wave: the conical fractures are initiated
after the passage of the main plastic compression
pulse, not before."

"The conditions required for the formation of shatter
cones are explored numerically and are found to be
consistent with the pressure range derived from both
explosion experiments and the analysis of shock
metamorphic features in impact structures. This model
permits us to deduce quantitative information about
the shape of the shock wave from the shape and size
of the observed shatter cones."


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Received on Sun 09 Nov 2003 01:16:49 PM PST