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Ramlat Fasad 574
Basic information Name: Ramlat Fasad 574
     This is an official name for a relict meteorite. Relict meteorites are composed mostly of terrestrial minerals, but are thought to have once been meteorites. Note: evidence that this was once a meteorite may not have been critically evaluated.
Abbreviation: RF 574
Observed fall: No
Year found: 2016
Country: Oman
Mass:help 2.2 kg
Classification
  history:
Recommended:  Relict iron    [explanation]

Comments: Entered 30 Aug 2021
Writeuphelp
Writeup from MB 110:

Ramlat Fasad 574        19°03.823’N, 53°23.753’E

Zufar, Oman

Find: 29 Jan 2016

Classification: Relict meteorite (Relict iron)

History: Found during a search for meteorites. 1855 g were collected on the surface. An additional 341 g of buried fragments were collected in 2017 using a metal detector.

Physical characteristics: A large number of black angular fragments were found in close proximity, partly buried in soil. Mass of largest fragment 348.9 g. Strongly magnetic.

Petrography: Lamellar mixture of magnetite, maghemite and iron hydroxides with small relict inclusions of kamacite, taenite and schreibersite.

Geochemistry: Bulk analysis (Activation laboratories, INAA) Fe = 56.1, Ni = 8.04, Co = 0.34 (all wt%); Cr = 39, Cu = 92, Ga = 17, Ge <10, Ir = 0.66, Pt = 17, Au = 0.45 (all μg/g). LA-ICP-MS analyses show inhomogeneous distribution of Ni and Co in Fe-oxyhydroxides with Ni = 5.76±2.34, range 3.7-8.7 wt%, Co = 0.47±0.11, range 0.37-0.71 (all wt%, N = 10). Compositions of relcit primary phases (EDS) kamacite Ni = 6.60±0.97 wt% (N = 10), taenite Ni = 30.2±6.0 wt% (N = 23), schreibersite has molar Ni/(Ni+Fe) of 0.37±0.04 (N = 35).

Classification: Relict iron meteorite. Element concentrations affected by terrestrial weathering. Probably paired with Ramlat Fasad 575 found at a distance of 156 m.

Specimens: 438 g at NMBE. Main mass: MHTO.

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Zufar
Origin or pseudonym:Desert plain
Date:29 Jan 2016
Latitude:19°03.823'N
Longitude:53°23.753'E
Mass (g):2196
Pieces:>100
Class:Relict iron
Weathering grade:high
Classifier:B. Hofmann, T. Pettke, T. Burri, E. Gnos
Type spec mass (g):438.000
Type spec location:NMBE
Main mass:MHTO
Finder:Edwin Gnos, Saif Al-Hamemi, Beda Hofmann, Å. Rosén
Comments:Field number 1601_0068_A; 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:
Relict meteorite
info:
Name: Ramlat Fasad 574
Fieldname: 1601_0068_A
Origin/pseudonym: Oman
Purchased:
Purchase or find date: 2016 Jan 29
Lat/long: 18°57.644'N, 53°15.524'E
Mass: 2537
Pieces: >100
Specimens: NMBE
Description: relict iron
Info:
Name assigned to: Beda Hofmann
Date assigned: 2021-05-22
Assigned by: Beda Hofmann
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::   (19° 3' 49"N, 53° 23' 45"E)
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