[meteorite-list] [IMCA] Conception Junction Inspection Recommendation

From: Larry Atkins <thetoprok_at_meteoritecentral.com>
Date: Tue, 29 Jan 2013 13:02:57 -0500 (EST)
Message-ID: <8CFCC6200627E9A-16F0-44B0C_at_webmail-m061.sysops.aol.com>

Hello Russ, List

Thanks for the heads up on Conception Junction. I'll have to call home
and have someone check on mine. I hope it's not falling apart!

Typically, I don't collect irons, meso's or pallasites because of the
high humidity that accompanies a Michigan summer. I've had bad
experience wit Admire and Campo. My Brahin endcut has experienced a
very slow decay. Ghubarra and SaU 001 are two stones
that have shown significant signs of deterioration.

Oddly, my silicated Campo is in excellent shape, showing no oxidation.
Has it been annealed from impact?


Sincerely,
Larry Atkins
?
IMCA # 1941
Ebay?alienrockfarm
?


-----Original Message-----
From: Russ Finney <curator at meteoritecollector.org>
To: imca <imca at imcamail.de>
Sent: Tue, Jan 29, 2013 10:08 am
Subject: [IMCA] Conception Junction Inspection Recommendation



Hello Everyone:

This week I finished my annual detailed one-by-one inspection of the
specimens
in my collection (about 2,800 total specimens). In the summer time I do
a
similar inspection, but not as detailed.

When I checked Conception Junction, which is in a sealed box with
silica beads
as a desiccant, I noticed some rust forming on the edges. I opened the
box and
found the specimen to be in pretty bad shape.

I am doing the usual recovery steps to salvage what remains, but I
wanted to
warn others to check their own Conception Junction specimens since this
rusting
really caught me by surprise, the slice had been looking stable during
the last
few visual inspections.

Other iron/pallasite specimens which required maintenance this time
were:

Brenham (several specimens are slowly turning to dust)
Carlton (minor rust)
Campo del Cielo (some bright slices showed rust)
Goose Lake (minor rust)
Muonionalusta (some rust, no surprise, needs curation)
Nantan (some rust, no surprise here either)
Pedernales (minor rust)
Morasko (minor rust)

I also had two stone meteorites which required maintenance:

Travis County (a): Monnig specimen, I was surprised that it needed
curation
Ghubara: one large cut specimen was lightly rusting - is that normal? -
my
others are fine

That was all that required attention during this specimen review.

If you have any of these you might check your own collections as well...

Looking forward to seeing everyone in Tucson!

Best Regards,

Russ Finney

http://www.meteoritecollector.org
Received on Tue 29 Jan 2013 01:02:57 PM PST