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Ramlat as Sahmah 384
Basic information Name: Ramlat as Sahmah 384
     This is an OFFICIAL meteorite name.
Abbreviation: RaS 384
Observed fall: No
Year found: 2010
Country: Oman
Mass:help 5.03 kg
Meteoritical Bulletin:  MB 101  (2012)  Mesosiderite-C2
Recommended:  Mesosiderite-C2    [explanation]

This is 1 of 5 approved meteorites classified as Mesosiderite-C2.   [show all]
Search for other: Class C mesosiderites, Mesosiderites, and Metal-rich meteorites
Comments: Approved 11 Jul 2012
Writeup from MB 101:

Ramlat as Sahmah 384 (RaS 384)        20°0.294’N, 56°24.284’E

Al Wusta, Oman

Found: 2010 Jan 23

Classification: Mesosiderite (group C2)

History: This meteorite was found in the RaS 202 mesosiderite strewnfield.

Physical characteristics: Irregularly shaped brown rock without fusion crust, clasts visible at surface.

Petrography: (A. Bretscher, Bern, B. Hofmann, NMBE, E. Gnos, MHNGE): The stone consists of a matrix of pyroxene (70%), plagioclase (7%), olivine (2%) and mostly oxidized metal (21 vol% oxide, originally 13 vol% metal) with abundant mineral and lithic clasts up to several cm in size. Mineral clasts comprise enstatite and olivine, lithic clasts are eucritic to diogenitic.

Geochemistry: Compositions of matrix silicates are Fa31.4 (clasts: Fa28.1-29.6) and Fs26.7Wo2.0 (clasts: Fs30-57Wo2.0-3.6), plagioclase An91.1. Bulk analyses of clasts show Fe/Mn (wt) 30-42 (matrix 91), Ni bulk is 1.57%. Oxygen isotopes (I. A. Franchi and R. C. Greenwood, OU): Analyses of 17 samples of matrix and clasts yielded Δ17O = -0.244±0.010 ‰.

Classification: Based on mineral compositions, matrix mode and oxygen isotopes this is a mesosiderite of type 2C. All aspects are virtually identical to paired RaS 202.

Specimens: All at NMBE.

Data from:
  Table 0
  Line 0:
State/Prov/County:Al Wusta
Origin or pseudonym:desert plain
Date:2010 Jan 23
Mass (g):5026
Fayalite (mol%):31.4
Ferrosilite (mol%):26.7
Wollastonite (mol%):2
Classifier:A. Bretscher, B. Hofmann, NMBE; E, Gnos, MHNGE
Type spec mass (g):5026
Type spec location:NMBE
Main mass:NMBE
Finder:A. Bretscher, B. Hofmann, C. Opitz, R. Trappitsch, J. Walbrecker, F. Zurfluh
Comments:Submitted by Beda Hofmann
   and collections
NMBE: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
MHNGE: Muséum d’histoire naturelle, Route de Malagnou 1, CH-1211 Genève 6 , Switzerland (institutional address; updated 27 Oct 2011)
Bern: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address)
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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     Recommended::   (20° 0' 18"N, 56° 24' 17"E)

     This is 1 of 1756 approved meteorites from Al Wusta, Oman (plus 75 unapproved names)
     This is 1 of 4002 approved meteorites from Oman (plus 434 unapproved names)
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