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Ramlat as Sahmah 430
Basic information Name: Ramlat as Sahmah 430
     This is an OFFICIAL meteorite name.
Abbreviation: RaS 430
Observed fall: No
Year found: 2011
Country: Oman
Mass:help 102 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  H3
Recommended:  H3    [explanation]

This is 1 of 594 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 31 Dec 2015
Writeuphelp
Writeup from MB 104:

Ramlat as Sahmah 430 (RaS 430)        20.175°N, 56.451°E

Al Wusta, Oman

Find: 2011 Feb

Classification: Ordinary chondrite (H3)

History: Found by an anonymous prospector in February 2011.

Petrography: (A. Irving and S. Kuehner, UWS) Unequilibrated chondrite composed of well-formed, small to medium-sized chondrules (mostly 0.3-0.9 mm) in a dark brown, highly altered matrix.

Geochemistry: Olivine (Fa0.7-19.1), orthopyroxene (Fs2.2-9.9Wo0.8-0.7), augite (Fs6.0-6.1Wo45.3-44.7). Oxygen isotopes (K. Ziegler, UNM) Analysis of an acid-washed subsample by laser fluorination gave δ17O 3.170; δ18O 5.123; Δ17O 0.465 per mil.

Classification: Ordinary chondrite H3. Oxygen isotopes plot at the edge of the field for H chondrites, but an H affinity is favored by the relatively small chondrule size, abundance of (altered) metal and the low maximum Fa content in olivine.

Specimens: Type specimen plus one polished thin section at PSF; main mass with anonymous collector.

Data from:
  MB104
  Table 0
  Line 0:
State/Prov/County:Al Wusta
Date:2011 Feb
Latitude:20.175°N
Longitude:56.451°E
Mass (g):102
Pieces:1
Class:H3
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):0.7-19.1 (N=4)
Ferrosilite (mol%):2.2-9.9
Wollastonite (mol%):0.8-0.7
Magnetic suscept.:4.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.06
Type spec location:PSF
Main mass:Anonymous
Comments:Submitted by P. Sipiera
Plots: O isotopes:  
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography:

Oman
Coordinates:
     Recommended::   (20° 10' 30"N, 56° 27' 4"E)

Statistics:
     This is 1 of 1747 approved meteorites from Al Wusta, Oman (plus 72 unapproved names)
     This is 1 of 3944 approved meteorites from Oman (plus 371 unapproved names)
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