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Ramlat as Sahmah 287 | |||||||||||||||||||||||||||||||
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Basic information | Name: Ramlat as Sahmah 287 This is an OFFICIAL meteorite name. Abbreviation: RaS 287 Observed fall: No Year found: 2009 Country: Oman Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 518 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 21 Sep 2012 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 101:
Ramlat as Sahmah 287 (RaS 287) 20°28.607’N, 55°31.673’E Al Wusta, Oman Found: 21 Jan 2009 Classification: HED achondrite (Diogenite) History: A large individual of 1958.6 g and one small fragment (3.361 g) were found during a search for meteorites by N. Dalcher, N. Greber, B. Hofmann, S. Lorenzetti and F. Zurfluh. Physical characteristics: Greenish-grey rock, partly covered with black fusion crust, total mass 1962.0 g. Petrography: (B. Hofmann, NMBE, F. Zurfluh, E. Gnos, MHNGE): The rock shows a brecciated texture with large orthopyroxene clasts (2-5 mm) in a fine-grained (0.2-0.4 mm) matrix. Other phases are minor chromite and accessory troilite and Fe metal, forming inclusion trails in orthopyroxene and chromite. Geochemistry: Pyroxene composition Fs27.6Wo2.2. Bulk analysis shows MgO 25.2%, Fe/Mn = 29.1. Oxygen isotopes (I.A. Franchi and R.C. Greenwood, OU): Analyses of a bulk sample yielded δ17O = 1.53, δ18O = 3.38, and Δ17O = -0.23 per mil (mean of 2 replicates). Classification: Based on texture, bulk Fe/Mn, mineralogy and oxygen isotopes this is a diogenite. Specimens: All at NMBE. | ||||||||||||||||||||||||||||||
Data from: MB101 Table 0 Line 0: |
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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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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Geography:![]() |
Statistics: This is 1 of 1759 approved meteorites from Al Wusta, Oman (plus 75 unapproved names) This is 1 of 4006 approved meteorites from Oman (plus 436 unapproved names) | ||||||||||||||||||||||||||||||
Proximity search: |