header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 5 Dec 2021
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Ramlat as Sahmah 420
Basic information Name: Ramlat as Sahmah 420
     This is an OFFICIAL meteorite name.
Abbreviation: RaS 420
Observed fall: No
Year found: 2010
Country: Oman
Mass:help 70.3 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 594 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 11 Jul 2012
Writeuphelp
Writeup from MB 101:

Ramlat as Sahmah 420 (RaS 420)        20°25.023’N, 56°16.495’E

Al Wusta, Oman

Found: 2010 Feb 5

Classification: Ureilite

History: A single stone of 70.3 g was found during a search for meteorites.

Physical characteristics: Greenish brown, partly wind-abraded stone, fusion crust is partly preserved.

Petrography: (B. Hofmann, NMBE, F. Zurfluh, Bern, E. Gnos, MHNGE): The stone consists of olivine and pyroxene, with characteristic ureilitic texture. Olivine has reduced Fe-poor rims with minute inclusions of Fe metal. Larger metal at grain boundaries is completely weathered. Carbon platelets (to 0.9 mm length) consisting of graphite and diamond are abundant along silicate grain boundaries of. Shock stage is S2 based on (annealed?) silicates.

Geochemistry: Compositional ranges of silicates are Fa4.8-20.8 and Fs16.8 Wo8.0(7.9-8.4) (range Fs16.4-17.2Wo7.9-8.4). Bulk Fe/Mn=52.3 wt%, Ni 1010 ppm.

Classification: Based on texture and mineralogy this is a ureilite.

Specimens: All at NMBE.

Data from:
  MB101
  Table 0
  Line 0:
State/Prov/County:Al Wusta
Origin or pseudonym:desert plain
Date:2010 Feb 5
Latitude:20°25.023'N
Longitude:56°16.495'E
Mass (g):70.298
Pieces:1
Class:Ureilite
Fayalite (mol%):20.2
Ferrosilite (mol%):16.8
Wollastonite (mol%):8
Magnetic suscept.:4.28
Classifier:F. Zurfluh, Bern; B. Hofmann, NMBE; and E. Gnos, MHNGE
Type spec mass (g):70.3
Type spec location:NMBE
Main mass:NMBE
Finder:A. Bretscher, B. Hofmann, C. Opitz, R. Trappitsch, F. Zurfluh
Comments:Submitted by Beda Hofmann
Institutions
   and collections
NMBE: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Oman
Coordinates:
     Recommended::   (20° 25' 1"N, 56° 16' 30"E)

Statistics:
     This is 1 of 1755 approved meteorites from Al Wusta, Oman (plus 75 unapproved names)
     This is 1 of 3999 approved meteorites from Oman (plus 434 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page