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Ramlat Fasad 533
Basic information Name: Ramlat Fasad 533
     This is an OFFICIAL meteorite name.
Abbreviation: RF 533
Observed fall: No
Year found: 2018
Country: Oman
Mass:help 35.2 g
Recommended:  Martian (Shergottite)    [explanation]

This is 1 of 284 approved meteorites (plus 2 unapproved names) classified as Martian (Shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 30 Aug 2021
Writeup from MB 110:

Ramlat Fasad 533        18°54.487’N, 53°15.353’E

Zufar, Oman

Find: 2018 Feb 03

Classification: Martian meteorite (Shergottite)

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

Physical characteristics: Broken greenish-grey individual, 3.5 × 3.5 × 1.8 cm, smooth ablated surface with traces of fusion crust preserved on one side

Petrography: (J. Pape, E. Gnos, B. Hofmann) The sample consist mainly of olivine, pigeonitic pyroxene and maskelynitic plagioclase. Olivine grains are chemically zoned and occur as large (up to 4 mm) porphyritic grains with slightly brownish cores in a relatively fine-grained matrix mostly consisting of equigranular pyroxene and interstitial maskelynite (both up to 0.5 mm). Some olivine grains are speckled with minute Cr-spinel grains. Pyrrhotite, chromite (up to 0.3 mm) and Fe-rich spinels occur as accessory phases. Dark shock-melt pockets up to several mm are common. Strongly shocked. Low degree of weathering.

Geochemistry: (J. Pape) Olivine Fa30.5±8.3 (Fa17.7-46.1) (N = 27), olivine cores have Fa>17.7. Pigeonite has Fs26.2±5.5 and Wo12.6±7.0 (Fs20.7-35.9 Wo4.0-25.8), mean FeO/MnO = 26.9±1.9 (N = 16). Maskelynite has An69.4±2.0Or 0.6±0.3 (N = 20). Oxygen isotopes: (R. Greenwood, OU) δ18O = 4.243 δ17O = 2.520 Δ17O = 0.314 (all permil).

Classification: Based on petrography, mineral compositions and oxygen isotopes this is a olivine phyric shergottite, strongly shocked, low weathering. Paired with Ramlat Fasad 534 (found at a distance of 1060 m).

Specimens: 7.89 g and one polished thin section at NMBE. Main mass: MHTO.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Desert plain
Date:2018 Feb 03
Mass (g):35.149
Class:Martian (Shergottite)
Shock stage:strong
Weathering grade:low
Fayalite (mol%):30.5±8.3 (n=27)
Ferrosilite (mol%):26.2±5.5 (n=16)
Wollastonite (mol%):12.6±7.0 (n=16)
Magnetic suscept.:2.76
Classifier:J. Pape, E. Gnos, B. Hofmann
Type spec mass (g):7.89
Type spec location:NMBE
Main mass:MHTO
Finder:T. Blaise, E. Gnos, B. Hofmann, F. Mechelke, M. Sliz, I. Al-Sawafi
Comments:Field number 1802_0140; submitted by Beda Hofmann
Plots: O isotopes:  
   and collections
NMBE: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
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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Public domain photographs:
Beda Hofmann         

     Recommended::   (18° 54' 29"N, 53° 15' 21"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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