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Ramlat Fasad 532
Basic information Name: Ramlat Fasad 532
     This is an OFFICIAL meteorite name.
Abbreviation: RF 532
Observed fall: No
Year found: 2018
Country: Oman
Mass:help 245 g
Classification
  history:
Recommended:  Lunar (gabbro)    [explanation]

This is 1 of 11 approved meteorites classified as Lunar (gabbro).   [show all]
Search for other: Lunar meteorites
Comments: Approved 30 Aug 2021
Writeuphelp
Writeup from MB 110:

Ramlat Fasad 532        18°55.505’N, 53°14.500’E

Zufar, Oman

Find: 2018 Feb 02

Classification: Lunar meteorite (gabbro)

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

Physical characteristics: Irregular fragment, 8x4x5 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 ~15 mm) clasts in a matrix of mineral fragments up to 0.6 mm in size. Large 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 1 mm with complex fracturing, recrystallization and 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 mosaicism. Interconnected brown glassy melt veins (exhibiting flow lines in some areas) are traversing the whole sample, containing mineral inclusions from the host rock and vesicles filled with secondary alteration products (calcite). Strongly shocked, low weathering.

Geochemistry: (J. Pape) Pyroxene (pigeonite to augite) has Fs47.0±9.3Wo25.3±6.9 (Fs30.7-65.0Wo15.8-38.6), mean FeO/MgO = 4.7±4.6, mean FeO/MnO = 58.4±7.3 (N = 20). Plagioclase/maskelynite has An92.4±1.8Or 0.2±0.1 (N = 15). Symplectitic olivine has Fa95.8±1.5 (N = 7). Oxygen isotopes: (R. Greenwood, OU) δ18O = 6.205 δ17O = 3.249 Δ17O = 0.022 (all ‰). Bulk chemical composition (Activation Laboratories, all wt%): FeO = 20.77, MgO = 6.13, Al2O3 = 9.58, CaO = 13.31, TiO2 = 1.95, Th = 0.49 ppm; FeO/MnO = 66.8, Mg number = 0.344.

Classification: Lunar gabbro, strong shock, low weathering. Texture, mineralogy, mineral chemistry and bulk composition are very similar to MIL 05035 and Asuka 881757, suggesting source-pairing. Paired with Ramlat Fasad 535 (found at a distance of 118 m).

Specimens: 69.2 g and 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:2018 Feb 02
Latitude:18°55.505'N
Longitude:53°14.500'E
Mass (g):245.202
Pieces:1
Class:Lunar (gabbro)
Shock stage:strong
Weathering grade:low
Fayalite (mol%):95.8±1.5 (n=7)
Ferrosilite (mol%):47.0±9.3 (n=20)
Wollastonite (mol%):25.3±6.9 (n=20)
Magnetic suscept.:2.90
Classifier:J. Pape, E. Gnos, B. Hofmann
Type spec mass (g):69.2
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_0109; submitted by Beda Hofmann
Plots: O isotopes:  
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Photos:
CreditPhotos
Public domain photographs:
Beda Hofmann         
Geography:

Oman
Coordinates:
     Recommended::   (18° 55' 30"N, 53° 14' 30"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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