[meteorite-list] NWA 2620 - name discrepancy solved?

From: Michael Farmer <meteoritehunter_at_meteoritecentral.com>
Date: Wed Jan 5 19:13:17 2005
Message-ID: <003601c4f384$9b81e370$0200a8c0_at_S0031628003>

Rob and everyone, that looks like the problem, but it isnt. I have many
meteorites, in the 20## sequence, 2626 is a new Shergottite!
So that is not the error.
Mike Farmer
----- Original Message -----
From: "Matson, Robert" <ROBERT.D.MATSON_at_saic.com>
To: <meteorite-list-bounces_at_meteoritecentral.com>; "''Adam Hupe ' '"
<raremeteorites_at_comcast.net>; <meteorite-list@meteoritecentral.com>
Sent: Wednesday, January 05, 2005 5:02 PM
Subject: [meteorite-list] NWA 2620 - name discrepancy solved?


[Resending reply -- first attempt did not post. --Rob]

Hi Adam, Mike and List,

> NWA 2620 will be published in the very next bulletin as an H4,
> Main Mass Hupe Collection. No ifs, ands or buts about it. Why
> is so hard to understand?

Simple repetition of your position doesn't do anything to help
solve the discrepancy. Clearly there's a mistake somewhere. Who's
to say whether the mistake (which may be just a typo) is NAU's fault
or Ted Bunch's?

I have no involvement with NWA 2620, but I can read. And based
on today's posts I have a good guess as to what happened. Note
the sequence in Mike's repost of Ted's message:

> Email dated 12 December 2004
> "Mike: below and attached are the classifications that I can do
> for now. Have a good trip.
>
> Ted
>
> NWA 2620 (F5)
>
> Yellowish-green to brown, friable olivine diogenite. with
> orthopyroxene grains ... <snip>
>
> NWA 2631 (F7)
>
> H5: Fa19.2; S1 W1
>
> NWA 2632 (F8)
>
> LL3.2: Fa1.1-37.4; (Cr2O3 = 0.15-0.37; mean = 0.33 wt %); S1 W1.
>
> NWA 2633 (F9)
>
> CO3.1: Fa 7.7 ? 44.2 (Cr2O3 = 0.05-0.34 wt %); S1 W2 contains many
> small CAI inclusions.
> ...
(The message goes on to list classifications for NWA 2634 & 2635)

Doesn't it seem quite likely that 2620 was a typo, and that 2630
was intended? Kind of coincidental to have a gap of exactly
10 numbers for an otherwise contiguous sequence. The 2 is right
next to the 3 on the keyboard -- an innocent enough mistake.

--Rob

--ADDENDUM--

Another possibility is that there is a 0 vs. 9 typo (again, adjacent
numbers on the keyboard). I like this idea even better since it
would explain the missing F6 in the sequence:

2629 (F5)
[2630 (F6) not yet classified?]
2631 (F7)
2632 (F8)
2633 (F9)
2634 (F10)
2635 (F11)
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Received on Wed 05 Jan 2005 07:13:40 PM PST