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Ramlat Fasad 535
Basic information Name: Ramlat Fasad 535
     This is an OFFICIAL meteorite name.
Abbreviation: RF 535
Observed fall: No
Year found: 2019
Country: Oman
Mass:help 16.2 g
Classification
  history:
Recommended:  Lunar (gabbro)    [explanation]

This is 1 of 14 approved meteorites classified as Lunar (gabbro).   [show all]
Search for other: Lunar meteorites
Comments: Approved 28 May 2024
Writeuphelp
Writeup from MB 113:

Ramlat Fasad 535 (RF 535)        18°55.445’N, 53°14.523’E

Zufar, Oman

Find: 2019 Jan 30

Classification: Lunar meteorite (gabbro)

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

Physical characteristics: Irregular fragment, 2.5 × 2.0 × 2.0 cm, very coarse grained, strongly wind-ablated, no fusion crust.

Petrography: (J. Pape, E. Gnos, B. Hofmann) The sample exhibits a brecciated texture with large, coarse-grained (up to ~8 mm) clasts in a matrix of mineral fragments up to 1 mm in size. Clasts and groundmass show the same mineralogy with dominant pigeonitic to augitic pyroxene of variable compositions and plagioclase partly transformed to maskelynite. Minor phases are ilmenite, fayalitic olivine, elongated grains of silica up to 0.8 mm with complex fracturing and planar deformation features, with irregular, undulatory extinction. Common symplectitic intergrowths of fayalitic olivine (Fa96), augitic pyroxene and silica. Accessory phases are troilite and ulvöspinel. Pyroxene grains are highly fractured and show undulatory extinctions and mosicism. Interconnected brown glassy melt vein with flow lines, containing minute blebs of troilite and a single iron metal inclusion. Veins of terrestrial calcite. Strongly shocked, low weathering,

Geochemistry: (J. Pape) Pyroxene (pigeonite to augite) has Fs45.9±9.3Wo27.4±8.7 (Fs29.6-60.1Wo12.3-43.9), mean FeO/MgO = 5.4±6.3, mean FeO/MnO = 57.6±10.0 (N = 28). Plagioclase/maskelynite has An92.8±1.2Or 0.1±0.0 (N = 10). Symplectitic olivine has Fa96.6±1.9 (N = 8).

Classification: Lunar gabbro, strong shock, low weathering. Likely paired with Ramlat Fasad 532 found at a distance of 118 m.

Specimens: 4.48 g and one polished thin section at NMBE. Main mass: MHTO.

Data from:
  MB113
  Table 0
  Line 0:
State/Prov/County:Zufar
Origin or pseudonym:Desert plain
Date:2019 Jan 30
Latitude:18°55.445'N
Longitude:53°14.523'E
Mass (g):16.211
Pieces:1
Class:Lunar (gabbro)
Shock stage:strong
Weathering grade:low
Fayalite (mol%):96.6±1.9 (n=8)
Ferrosilite (mol%):45.9±9.3 (n=28)
Wollastonite (mol%):27.4±8.7 (n=28)
Magnetic suscept.:2.88
Classifier:J. Pape, E. Gnos, B. Hofmann, NMBE
Type spec mass (g):4.48
Type spec location:NMBE
Main mass:MHTO
Finder:E. Gnos, J. Hoffmann, B. Hofmann, H. Khan, M. Sliz, M. Al-Mashini
Comments:Field number 19-0100; 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)
MHTO: Ministry of Heritage and Tourism Muscat , Oman (institutional address; updated 10 Apr 2021)
Catalogs:
References: Published in Meteoritical Bulletin, no. 113, in preparation (2024)
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Photos:
CreditPhotos
Public domain photographs:
Beda Hofmann         
Geography:

Oman
Coordinates:
     Recommended::   (18° 55' 27"N, 53° 14' 31"E)

Statistics:
     This is 1 of 2531 approved meteorites from Zufar, Oman (plus 27 unapproved names)
     This is 1 of 4404 approved meteorites from Oman (plus 434 unapproved names)
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