[meteorite-list] NWA 2058 and pseudotachylite

From: Matt Morgan <mmorgan_at_meteoritecentral.com>
Date: Thu Apr 22 10:32:53 2004
Message-ID: <406220D4.4050000_at_mhmeteorites.com>

bernd.pauli_at_paulinet.de wrote:


> Here on Earth, The Vredefort Dome and Sudbury (Sudbury breccia) structures
> are the type areas for this unusual rock type called pseudotachylite but it has
> also been observed in other impact structures (Rochechouart, Manicouagan,
> Slate Islands).

Pseudotachylites are not *just* impact-specific fault melts. They may
also form along TECTONIC fault planes here on earth and I have heard of
them associated with mass-wasting deposits.

Matt


> Best wishes,
>
> Bernd
>
>
> References:
>
> STÖFFLER D. et al. (1991) Proposal for a revised petrographic shock
> classification of chondrites (Meteoritics 26-4, 1981, A398-A399).
>
> BEGEMANN F. et al. (1992) On the thermal history of heavily shocked
> Yanzhuang H-chondrite (Meteoritics 27-2, 1992, 174-178).
>
> XIANDE X. et al. (1991) The new meteorite fall of Yanzhuang, a severely
> shocked H6 chondrite with black molten materials (Meteoritics 26-4, 1991, A411).
>
> FRENCH B.M. (1998) Traces of Catastrophe (LPI Contribution 954, pp. 65-69).
>
> RUBIN A.E. (2003) Post-shock annealing and post-annealing shock: implications
> for the thermal and shock histories of ordinary-chondrite parent bodies (Lunar and
> Planetary Science XXXIV (2003), 1263.pdf).
>
> To: adamhupe_at_comcast.net
> Cc: meteorite-list_at_meteoritecentral.com
>
>
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Received on Wed 24 Mar 2004 06:59:16 PM PST