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Ramlat as Sahmah 201
Basic information Name: Ramlat as Sahmah 201
     This is an OFFICIAL meteorite name.
Abbreviation: RaS 201
Observed fall: No
Year found: 2002
Country: Oman
Mass:help 249 g
Meteoritical Bulletin:  MB 93  (2008)  R5
Recommended:  R5    [explanation]

This is 1 of 40 approved meteorites classified as R5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 14 Jan 2008
Revised 4 Aug 2008: final writeup
Writeup from MB 93:

Ramlat as Sahmah 201                   20°0.486'N, 56°24.889'E


Find: 24 December 2002

Rumuruti chondrite (R5)

History: A complete stone of 249.42 g was found during a systematic search for meteorites by A. Al-Kathiri, M. Eggimann, and S. Lorenzetti.

Physical characteristics: Complete rounded stone, dark greenish grey, without fusion crust and a mass of 249.42 g.

Petrography: (E. Gnos, MHNGE; B. Hofmann, NMBE; A. Al- Kathiri, UBE/MCI) The stone is brecciated and consists mainly of olivine and plagioclase and abundant troilite and pentlandite.

Mineral composition and Geochemistry: Olivine has an average composition of Fa39.1 (EMP) and Fa38.8 (XRD). Plagioclase shows a compositional range from An20-An21. Oxygen isotopes: (I.A. Franchi and R.C. Greenwood, OU) δ17O = 5.909, δ18O = 5.838, and Δ17O = 2.873.

Classification: Rumuruti chondrite (R5); S3, minor to partial weathering of troilite. Another six petrographically identical and most likely paired stones were found in adjacent areas of RaS and JaH in 2005 (mass of likely paired stones is 796.4 g), which are JaH 234/236/239/249 and RaS 249/254. Specimens: The entire sample is on deposit at NMBE.

Submitted by: Beda Hofmann, NMBE.

Data from:
  Table 8
  Line 124:
Origin or pseudonym:Oman, desert plain
Mass (g):249.4
Type spec mass (g):249.4
Plots: O isotopes:  
   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)
UBE: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address)
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
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     Recommended::   (20° 0' 29"N, 56° 24' 53"E)

     This is 1 of 1757 approved meteorites from Al Wusta, Oman (plus 75 unapproved names)
     This is 1 of 4002 approved meteorites from Oman (plus 436 unapproved names)
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