[meteorite-list] Matt's SPADE impact melt breccia

From: bernd.pauli_at_paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: Thu Apr 22 10:16:36 2004
Message-ID: <DIIE.0000003E00000E49_at_paulinet.de>

Hi John and List,

> The Spade meteorite looks and reads like a very special find.

It surely does!

S2; W2; annealed imb; silicate darkening;
chromite veinlets; martensite; ...

.. just to mention a few of its peculiarities!

My specimen is on its way across the "Big Pond".

> Congratulations to Matt ...

I concur!

> For me Spade being an IMB is extra exciting because I
> find the impact melt breccias to be very unique materials ...

Right! Just think of Abee, Cat Mountain, Chico,
Portales Valley, Rose City, Shaw, Smyer, etc.

> The metal quantity looks extreme for the Spade material

Looks almost like a high-metal E chondrite, doesn't it?

> I also found the article on shock metamorphism by Dr. Rubin to be very
> interesting. Occurrences of S5, annealed back to S2, and then shocked
> again to S4, etc. ...

So did I. Maybe meteoriticists will have to reconsider
some of their shock level assumptions if Rubin is right!

I got my thin L'Aigle slice today that I had bid on on EBay. Wow, how happy
I am about this little L6 - "only" an L6, but the "history-laden" L'Aigle chondrite,
that, along with Barbotan, convinced the last conservative bunch of enlightened
scientists, that stones do fall from the skies. I love this little gem !!!

Cheers,

Bernd
Received on Tue 26 Aug 2003 05:51:16 PM PDT