[meteorite-list] Met Bulletin Update - Slaghek's Iron and 14 NWA OC's

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Sat, 14 Sep 2013 20:07:22 -0400
Message-ID: <CAKBPJW_W3nNdYjFESJ7JkK2-0UiheEr1081m8iOWELMejZ6iXA_at_mail.gmail.com>

Hi Bulletin Watchers,

There are 15 new approvals, including a ~100 year old iron from Chile.

Slaghek's Iron link - http://www.lpi.usra.edu/meteor/metbull.php?code=23624

All new approvals -
http://www.lpi.usra.edu/meteor/metbull.php?sea=&sfor=names&ants=&falls=&valids=&stype=contains&lrec=50&map=ge&browse=&country=All&srt=name&categ=All&mblist=All&rect=&phot=&snew=1&pnt=Normal%20table&dr=&page=0

Slaghek's Iron write-up :

Slaghek's Iron, Updated Information from V. Moggi Cecchi, MSP

History: A mass of 1.9 kg was picked up by an anonymous collector in
the Atacama Desert, Chile and brought to the Technical Institute of
Livorno, Italy, by Gino H. Slaghek-Fabbri on October 1, 1916. No
details of the place or date of find are available.

Physical characteristics: The top surface of the meteorite is covered
by densely spaced pits 3-5 mm deep with sharp ridges in between. No
traces of fusion crust are visible.

Petrography: (V. Moggi Cecchi, MSP): An etched section displays a
medium Widmanst?tten structure with straight, long and 1.3?0.2 mm wide
kamacite lamellae (L/W ~25). Schreibersite commonly occurs as tiny
rhabdite grains or as veins at grain boundaries. Laths of Brezina
lamellae (>1 mm wide) surrounded by swathing kamacite occasionally
observed. Plessite, partly spheroidized, is common. Neumann bands are
rare, thus indicating low shock.

Geochemistry: (J.T. Wasson, UCLA, by INAA): The composition of the
metal is 0.513 % Co, and 8.77 % Ni; 188 Cu, 22.0 Ga, 51.0 Ge, 8.53 As,
0.77 W, 0.450 Ir, 0.995 Au (all in ?g/g); (F. Rugi, UniFi, by ICP-MS):
0.525% Co, and 8.82% Ni; 186 Cu, 24.0 Ga, 53.0 Ge, 8.47 As, 0.73 W,
0.453 Ir, 0.989 Au (all in ?g/g).

Classification: (V. Moggi Cecchi, MSP): Iron (III AB, medium octahedrite).

Specimens: A total of 311 g of sample is on deposit at MSP (Inv. #
5193). MSNM holds of the main mass, now weighing 1512 g.

Best regards and happy huntings,

MikeG

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Received on Sat 14 Sep 2013 08:07:22 PM PDT