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Ramlat Fasad 525
Basic information Name: Ramlat Fasad 525
     This is an OFFICIAL meteorite name.
Abbreviation: RF 525
Observed fall: No
Year found: 2018
Country: Oman
Mass:help 29.7 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 525        18°56.129’N, 53°17.212’E

Zufar, Oman

Find: 05 Feb 2018

Classification: Ureilite

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

Physical characteristics: Rounded inidivual with adhering sand crust, wind ablated, no fusion crust.

Petrography: (J. Pape, E. Gnos, B. Hofmann) The sample consist mainly of olivine and low-Ca pyroxene with rare augite inclusions. The sample is relatively fine-grained (~0.5-1 mm) and shows the characteristic ureilitic, equigranular texture, some low-Ca pyroxenes have poikilitic olivine inclusions. Silicates show low shock (S2). Olivine grains show gentle Fe-reduction in the rims (width 20-30 μm) with very minor Fe metal inclusions, partly oxidized due to weathering. Well crystallized graphite platelets (up to 0.6 mm length), no diamond was observed. Moderate weathering (most iron oxidized, silicates are unaffected).

Geochemistry: (J. Pape, NMBE) Olivine cores Fa11.9±0.2, Fe/Mn 19±1, Cr2O3 0.57±0.03 wt% (N = 19), reduced Ol rims have Fa>2.7. Low-Ca pyroxene has Fs10.4±0.1Wo5.0±0.05, Cr2O3 1.03±0.02 wt% (N = 33), reduced Px rims have Wo>1.1. Augite has Fs6.3±0.0Wo37.6±0.1 (N = 2).

Classification: Based on texture, mineralogy and geochemistry this is an unbrecciated, monomict and augite-bearing magnesian ureilite.

Specimens: All at NMBE, including one polished thin section.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Desert plain
Date:05 Feb 2018
Mass (g):29.74
Shock stage:low
Weathering grade:medium
Fayalite (mol%):11.9±0.2 (N = 19)
Ferrosilite (mol%):10.4±0.1 (N = 33)
Wollastonite (mol%):5.0±0.05 (N = 33)
Classifier:J. Pape, E. Gnos, B. Hofmann
Type spec mass (g):29.74
Type spec location:NMBE
Main mass:NMBE
Finder:T. Blaise, E. Gnos, B. Hofmann, F. Mechelke, M. Sliz, I. Al-Sawafi
Comments:Field number 1802_0172; 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)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     Recommended::   (18° 56' 8"N, 53° 17' 13"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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