[meteorite-list] Met Bulletin Update - Nothing is released....

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Mon, 16 Sep 2013 21:39:38 -0400
Message-ID: <CAKBPJW_3QSWWKBXu--=h_mS51Nuy+M_Qk6v44i=TNyU6Xc+fiQ_at_mail.gmail.com>

Hi Bulletin Watchers,

Nothing was approved today........ literally.

The iron meteorite "Nothing" has been approved -
http://www.lpi.usra.edu/meteor/metbull.php?code=58084

Write-up :

Nothing 34?31?13.93"N, 113?20?8.93"W

Arizona, USA

Found: 2010

Classification: Iron meteorite (IID)

History: In 2010, a gold prospector with a metal detector located an
iron mass buried about 60 cm below the surface, 4.5 km north of
Nothing, Arizona. The finder sold most of the mass (3.3 kg) in 2012 at
a natural history auction, where it was purchased by K.D. Jenkerson.

Physical characteristics: Flattened, rusty mass covered in caliche.
Interior relatively fresh.

Petrography: (L. Garvie, ASU) Etched sections display well-developed
medium Widmanst?tten pattern, with average bandwidth of 0.8 mm.
Kamacite lamellae straight to swollen, with rounded ends where they
abut against other lamellae. Kamacite displays abundant Neumann bands.
Taenite and plessite cover about 45% by area; dark etching plessite
predominates, comb and net plessite also present. Schreibersite occurs
as abundant 0.5 to 3 ?m inclusions in kamacite, as elongated skeletal
crystals enveloped in swathing kamacite, and as uncommon lamellae.
Only one (3 ? 2 mm) troilite nodule observed.

Geochemistry: (J.T. Wasson, UCLA) Composition by INAA: 6.63 mg/g Co,
101.3 mg/g Ni, 295 ?g/g Cu, 75.3 ?g/g Ga, 4.92 ?g/g As, 16.1 ?g/g Ir,
20.2 ?g/g Pt, and 0.628 ?g/g Au. The Nothing meteorite is distinct
from the other two IID irons from the southwestern US, Wallapai (3.99
?g/g Ir and 1.533 ?g/g Au) and Needles (5.37 ?g/g Ir and 1.404 ?g/g
Au). Its nearest relative is Carbo (14.3 ?g/g Ir), but Nothing is
compositionally well resolved.

Classification: Iron, IID

Specimens: 120.83 g at ASU

Best regards and happy huntings,

MikeG

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Received on Mon 16 Sep 2013 09:39:38 PM PDT