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Ramlat Fasad 518
Basic information Name: Ramlat Fasad 518
     This is an OFFICIAL meteorite name.
Abbreviation: RF 518
Observed fall: No
Year found: 2017
Country: Oman
Mass:help 9.1 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 594 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 10 Apr 2021
Writeuphelp
Writeup from MB 110:

Ramlat Fasad 518        18°57.085’N, 53°26.257’E

Zufar, Oman

Find: 02 Feb 2017

Classification: Ureilite

History: A single rounded fragment was found during a search for meteorites.

Physical characteristics: Dark brown-olive wind ablated stone, 3 cm maximum dimension. A clast of 10 mm maximum dimension is visible. Some fusion crust is preserved.

Petrography: (S. Rout, E. Gnos, B. Hofmann) The meteorite consists dominantly of olivine and pigeonite with characteristic ureilitic texture and indications of brecciation, primary grain size is 1-10 mm. Large regions of olivine are reduced with minute inclusions of Fe metal. All pyroxene grains (some appear to be clasts up to 10 mm) show signatures of recrystallization and contain two types of pigeonites, enstatite, augite, interstitial glass and Fe-metal grains. Primary silicate grains show low shock (S2). Carbon platelets are irregular in shape, to 1.5 mm, consist of diamond and fine-grained graphite. Medium weathering (most iron metal oxidized, silicates are unaffected).

Geochemistry: (S. Rout, Bern) Olivine cores: Fa19.4±0.3, Fe/Mn = 52±3, Cr2O3=0.64±0.03 wt% (N = 14), reduced rims have Fa = 6.2±4.8, Cr2O3=0.6±0.2 wt% (N = 18). Pigeonite cores: Fs16.3±0.2Wo11.1±0.2, Cr2O3 1.16±0.05 wt% (N = 15). Recrystallized pigeonite: Fs9.7±3.1Wo10.4±1.6 (N = 7). Augite: Fs3.7Wo32.2 (N = 1). Enstatite: Fs12.9±0.4Wo4.2±0.3 (N = 7). Glass: Na2O 2.6 wt%, CaO 4.5 wt%, Al2O3 13.6 wt%, SiO2 73.3 wt% (N = 1).

Classification: Based on texture, mineralogy and geochemistry this is a ferroan ureilite. Paired with Ramlat Fasad 517

Specimens: 2.016 g including one polished thin section at NMBE, main mass: MHTO

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Zufar
Origin or pseudonym:Desert plain
Date:02 Feb 2017
Latitude:18°57.085'N
Longitude:53°26.257'E
Mass (g):9.132
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:medium
Fayalite (mol%):19.4±0.3 (N = 14)
Ferrosilite (mol%):16.3±0.2 (N = 15)
Wollastonite (mol%):11.1±0.2 (N = 15)
Classifier:S. Rout, E. Gnos, B. Hofmann
Type spec mass (g):2.016
Type spec location:NMBE
Main mass:MHTO
Finder:M. Bucher, U. Eggenberger, E. Gnos, B. Hofmann, I. Kouvatsis, M. Sliz, Z. Al-Musharrafi
Comments:Field number 1702_0117; 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)
Bern: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address)
MHTO: Ministry of Heritage and Tourism Muscat , Oman (institutional address; updated 10 Apr 2021)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography:

Oman
Coordinates:
     Recommended::   (18° 57' 5"N, 53° 26' 15"E)

Statistics:
     This is 1 of 2166 approved meteorites from Zufar, Oman (plus 22 unapproved names)
     This is 1 of 3999 approved meteorites from Oman (plus 434 unapproved names)
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