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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 253 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 Meteoritical Bulletin, no. 110, in preparation (2021)
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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 2167 approved meteorites from Zufar, Oman (plus 22 unapproved names)
     This is 1 of 4001 approved meteorites from Oman (plus 434 unapproved names)
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