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Ramlat Fasad 520
Basic information Name: Ramlat Fasad 520
     This is an OFFICIAL meteorite name.
Abbreviation: RF 520
Observed fall: No
Year found: 2017
Country: Oman
Mass:help 1.08 g
Recommended:  Ureilite    [explanation]

This is 1 of 604 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 10 Apr 2021
Writeup from MB 110:

Ramlat Fasad 520        18°55.685’N, 53°25.453’E

Zufar, Oman

Find: 03 Feb 2017

Classification: Ureilite

History: A single small individual was found during a search for meteorites.

Physical characteristics: Dark brown-olive wind ablated inidividual, 1.4 cm maximum dimension. No fusion crust.

Petrography: (S. Rout, E. Gnos, B. Hofmann) The meteorite consists dominantly of olivine and pigeonite with characteristic ureilitic texture, primary grain size is 1-3 mm. Large regions of olivine show secondary reduction with minute inclusions of Fe metal. All pyroxene grains show signatures of recrystallization and contain two types of pigeonites, enstatite, rare augite, interstitial glass and Fe-metal grains. Primary silicate grains show low shock (S2). Carbon platelets are irregular in shape, to 1 mm, consist of diamond and fine-grained graphite. Medium weathering (most iron metal oxidized, silicates are unaffected).

Geochemistry: (S. Rout, Bern) Olivine cores: Fa19.3±0.4, Fe/Mn = 48±2, Cr2O3 0.65±0.06 wt% (N = 44), reduced rims have Fa9.9±3.9 (N = 19). Pigeonite cores: Fs15.7/16.1Wo10.8/10.9, Cr2O3 = 1.02/1.08 wt% (N = 2); recrystallized pigeonite: Fs6.6±0.1Wo8.2±3.6 (N = 5). Single augite grain: Fs4.0Wo36.9. Glass: Na2O 2.4 wt%, CaO 4.1 wt%, Al2O3 14.7 wt%, SiO2 72.9 wt% (N = 1).

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

Specimens: 0.26 g including one polished thin section at NMBE, main mass: MHTO

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Desert plain
Date:03 Feb 2017
Mass (g):1.077
Shock stage:low
Weathering grade:medium
Fayalite (mol%):19.3±0.4 (N = 23)
Ferrosilite (mol%):15.7; 16.1 (N = 2)
Wollastonite (mol%):10.8; 10.9 (N = 2)
Classifier:S. Rout, E. Gnos, B. Hofmann
Type spec mass (g):0.26
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_0170; submitted by Beda Hofmann
   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)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     Recommended::   (18° 55' 41"N, 53° 25' 27"E)

     This is 1 of 2168 approved meteorites from Zufar, Oman (plus 22 unapproved names)
     This is 1 of 4002 approved meteorites from Oman (plus 434 unapproved names)
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