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Dhofar 2122
Basic information Name: Dhofar 2122
     This is an OFFICIAL meteorite name.
Abbreviation: Dho 2122
Observed fall: No
Year found: 2018
Country: Oman
Mass:help 62.8 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 288 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 30 Aug 2021
Writeuphelp
Writeup from MB 110:

Dhofar 2122 (Dho 2122)        19°23.731’N, 54°31.758’E

Zufar, Oman

Find: 2018 Feb 10

Classification: Lunar meteorite (feldspathic breccia)

History: Three fragments were found in close proximity during a search for meteorites.

Physical characteristics: Three grey fragments with rusty specks and light clasts, maximum dimensions of 5.5, 3 and 2 cm, irregular surface, no fusion crust preserved.

Petrography: (J. Pape, E. Gnos, B. Hofmann) The sample shows a complex brecciated texture with rock and mineral clasts up to 5 mm embedded in a fine-grained matrix. Feldspar grains and feldspar-rich clasts are partly transformed to maskelynite. Most feldspar, olivine and pyroxene grains are highly fractured, show fine-grained recrystallization and irregular and undulatory extinction. The sample contains mm-sized mafic clasts of fine-grained olivine, pigeonite and Cr-spinel mineral assemblages. Several roundish pockets appear mostly black in polarized transmitted light, contain variable mineral inclusions, and are interpreted to mostly consist of glass. The largest mineral/rock clasts are up to 3 mm. Additional observed phases are troilite, grains of Fe-Ni metal up to 0.5 mm and Cr-spinel. Common veins of terrestrial calcite. Medium weathering.

Geochemistry: (J. Pape) Olivine composition: Fa30.9±10.2 (range Fa21.4-52.8), Fe/Mg = 0.5±0.3, Fe/Mn = 83.4±7.7 (N = 18), two Fe-rich olivine analyses give Fa92.2±1.2 (N = 2). Low-Ca pyroxene composition (pigeonite or orthopyroxene): Fs27.8±5.1Wo9.5±5.5 (range Fs20.6-38.1Wo2.9-22.3), Fe/Mg = 0.5±0.1 and Fe/Mn = 50.7±4.5 (N = 19). Plagioclase composition: An96.0±1.9Or0.4±0.3 (range An89.0-98.1Or0.1-1.0) (N = 24). Bulk concentrations (pXRF, N = 3): FeO = 7.92±0.34 wt%, MnO 0.11±0.01 wt%, Cr = 1330±80 ppm, Ni = 156±47 ppm; FeO/MnO = 72.

Classification: Based on petrography and mineral compositions this is a lunar feldspathic breccia. Strongly shocked, medium weathering.

Specimens: 15.6 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 10
Latitude:19°23.731'N
Longitude:54°31.758'E
Mass (g):62.843
Pieces:3
Class:Lunar (feldsp. breccia)
Shock stage:strong
Weathering grade:medium
Fayalite (mol%):30.9±10.2 (n=18)
Ferrosilite (mol%):27.8±5.1 (n=19)
Wollastonite (mol%):9.5±5.5 (n=19)
Magnetic suscept.:3.27
Classifier:J. Pape, E. Gnos, B. Hofmann
Type spec mass (g):15.6
Type spec location:NMBE
Main mass:MHTO
Finder:E. Gnos, B. Hofmann, M. Sliz, T. Blaise, F. Mechelke, i. Al-Sawafi
Comments:Field number 1802_0273_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:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos:
CreditPhotos
Public domain photographs:
Beda Hofmann   
Geography:

Oman
Coordinates:
     Recommended::   (19° 23' 44"N, 54° 31' 45"E)

Statistics:
     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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