Meteoritical Bulletin: Entry for Ramlat as Sahmah 201

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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: 249 g

Classification
history:

Meteoritical Bulletin:	MB 93	(2008)	R5
Recommended:			R5 [explanation]

This is 1 of 41 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

help

Writeup from MB 93:

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

Oman

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 Fa_39.1(EMP) and Fa_38.8 (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:
  MB93
  Table 8
  Line 124:

Origin or pseudonym:	Oman, desert plain
Date:	24-Dec-02
Latitude:	20°00.486'N
Longitude:	56°24.889'E
Mass (g):	249.4
Pieces:	1
Class:	R5
Type spec mass (g):	249.4

Plots:

O isotopes:

Institutions
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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)

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Geography:

Oman

Oman

Coordinates:
Recommended::	(20° 0' 29"N, 56° 24' 53"E)

Statistics:
This is 1 of 1753 approved meteorites from Al Wusta, Oman (plus 81 unapproved names)
This is 1 of 3998 approved meteorites from Oman (plus 441 unapproved names)

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