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Lunar Meteorite: Dhofar 026 and 457 through 468 (paired stones)

Oman

Dhofar 026. (Original source of photo unknown.)
Photos courtesy of Luc Labenne.
A small slab of Dhofar 026. Tick mark spacing: 1 mm.
(Photo by Randy Korotev)
  
A small slab of Dhofar 461.
(Photo by Randy Korotev)

 
It's one of the few granulitic breccias - a metamorphic rock.
  

from The Meteoritical Bulletin No. 84, Meteoritics & Planetary Science 35, A199-A225 (2000)

Dhofar 026

18º13.6'N 54º06.7'E
Oman
Found 2000 March 6

Lunar meteorite (anorthositic crystalline melt breccia) 

A brownish gray stone weighing 148 g was found in the Dhofar region of Oman. Mineralogy and classification Mineralogy and classification (M. Nazarov and M. Ivanova, Vernad): fusion crust absent; meteorite is a clast-poor, anorthositic, crystalline melt breccia containing rare mineral fragments and clasts of feldspathic rocks embedded in a completely devitrified fine-grained matrix; vesicles are abundant; sphere-shaped, chondrule-like inclusions and rare impact melt veins are present; feldspar, An96-98; olivine (a dominant mafic phase), Fo61-79 (Fe/Mn = 80-120 at.); low-Ca pyroxene, En53-63Wo8-20 (with 0.13-0.84 wt% TiO2, Fe/Mn = 40-60 at.); high-Ca pyroxene, En43-50Wo27-33 (with 1.1-3.5 wt% TiO2, Fe/Mn = 40-50 at.); accessory minerals are silica, ilmenite (MgO = 7 wt%), troilite, and FeNi metal; a prominent positive Eu anomaly (Sm/Eu = 1.04) is present; terrestrial weathering is not significant. The meteorite is completely different in texture and composition from Dhofar 025, but pairing must still be considered due to the proximity of the finds to one another. Specimens: type specimen, 41 g plus two thin sections, Vernad; main mass with anonymous finder.

Dhofar 457-468

from The Meteoritical Bulletin, no. 89, Meteoritics & Planetary Science 40, A201-A263 (2005) (Table 6)


name      date found    latitude        longitude   mass   pieces               comment                  type
                                    (N)               (E)                (g)                                                             (g)
Dho 457   04/03/2001  18°14.901'  54°00.096'   99.5      1        Lunar Paired with Dho 026   1.64
Dho 458   04/03/2001  18°14.917'  54°00.145'   36.7      1        Lunar Paired with Dho 026   1.00
Dho 459   04/03/2001  18°14.914'  54°00.202'   31.5      1        Lunar Paired with Dho 026   1.68
Dho 460   04/10/2001  18°14.965'  54°00.436'   73.1      1        Lunar Paired with Dho 026   9.16
Dho 461   04/22/2001  18°14.682'  53°59.868'   33.7      1        Lunar Paired with Dho 026   3.03
Dho 462   04/22/2001  18°14.800'  54°00.113'   44.7      1        Lunar Paired with Dho 026   1.97
Dho 463   04/22/2001  18°14.808'  54°00.145'   24.3      1        Lunar Paired with Dho 026   2.85
Dho 464   04/23/2001  18°14.976'  53°59.662'   22.3      1        Lunar Paired with Dho 026   1.17
Dho 465   04/23/2001  18°14.833'  54°00.377'   70.7      1        Lunar Paired with Dho 026   2.58
Dho 466   04/26/2001  18°14.814'  53°59.772'   69.2      1        Lunar Paired with Dho 026   2.17
Dho 467   07/11/2001  18°15.226'  54°00.046'   36.2      1        Lunar Paired with Dho 026   1.17
Dho 468   07/12/2001  18°15.390'  53°59.525'   18.9      1        Lunar Paired with Dho 026   0.91

More Information

Meteoritical Bulletin Database

Dhofar 026 | Dhofar 457 458 459 460 461 462 463 464 465 466 467 468

Lunar Meteorite Compendium

Dhofar 026 et al.

Map

Schematic Map of the Find Locations of the Dhofar Lunar Meteorites

References

Cohen B. A., Taylor L. A., and Nazarov M. A. (2001) Lunar meteorite Dhofar 026: A second-generation impact melt (abstract). In Lunar and Planet. Science XXXII, abstract no. 1404, Lunar and Planetary Institute, Houston.

Cohen B. A., Swindle T.D., Taylor L.A., and Nazarov M.A. (2002) 40Ar-39Ar ages from impact melt clasts in lunar meteorites Dhofar 025 and Dhofar 026 (abstract), In Lunar and Planetary Science XXX, abstract no. 1252, Lunar and Planetary Institute, Houston.

Cohen B. A., James O. B., Taylor L. A., Nazarov M. A., and Barsukova L. D. (2004) Lunar highland meteorite Dhofar 026 and Apollo sample 15418: Two strongly shocked, partially melted, granulitic breccias. Meteoritics & Planetary Science 39, 1419–1447.

Demidova S. I., Nazarov M. A., Lorenz C. A., Kurat G., Brandstätter F., and Ntaflos Th. (2007) Chemical composition of lunar meteorites and the lunar crust. Petrology 15 (4), 386-407.

Fernandes V. A., Anand M., Burgess R., and Taylor L. A. (2004) Ar-Ar studies of Dhofar clast-rich feldspathic highland meteorites: 025, 026, 280, 303 (abstract). In Lunar and Planetary Science XXXV, abstract no. 1514, Lunar and Planetary Institute, Houston.

James O. B., Cohen B. A., and Taylor L. A. (2003) Lunar meteorite Dhofar 026: A shocked granulitic breccia, not an impact melt (abstract). In Lunar and Planetary Science XXXIV, abstract no. 1149, Lunar and Planetary Institute, Houston.

James O. B.; Cohen B. A.; Taylor L. A.; Nazarov M. A. (2007) Comment on: "New" lunar meteorites: Impact melt and regolith breccias and large-scale heterogeneities of the upper lunar crust, by P. H. Warren, F. Ulff-Moller, and G. W. Kallemeyn. Meteoritics & Planetary Science 42, 1029-1032.

Korotev R. L. (2005) Lunar geochemistry as told by lunar meteorites. Chemie der Erde 65, 297–346.

Korotev R. L., Jolliff B. L., Zeigler R. A., Gillis J. J., and Haskin L. A. (2003) Feldspathic lunar meteorites and their implications for compositional remote sensing of the lunar surface and the composition of the lunar crust. Geochim. Cosmochim. Acta 67, 4895–4923.

Nishiizumi K. and Caffee M. W. (2001) Exposure histories of lunar meteorites Dhofar 025, 026, and Northwest Africa 482 (abstract). 64th Meteoritical Society Meeting, abstract no. 5411.

Nishiizumi K., Hillegonds D. J., McHargue L. R., and Jull A. J. T. (2004) Exposure and terrestrial histories of new lunar and martian meteorites (abstract), In Lunar and Planetary Science XXXV, abstract no. 1130, Lunar and Planetary Institute, Houston.

Shukolyukov Y. A., Nazarov M. A., Pätsch M., and Schultz L. (2001) Noble gases in three lunar meteorites from Oman (abstract), In Lunar and Planet. Science XXXII, abstract no. 1502, Lunar and Planetary Institute, Houston.

Taylor L. A., Nazarov M. A., Cohen B. A., Warren P. H., Barsukova L. D., Clayton R. N., and Mayeda T. K. (2001) Bulk chemistry and oxygen isotopic compositions of lunar meteorites Dhofar 025 and Dhofar 026: A second-generation impact melt (abstract). In Lunar and Planet. Science XXXII, abstract no. 1985, Lunar and Planetary Institute, Houston.

Warren P. H., Taylor L. A., Kallemeyn G., Cohen B. A., Nazarov M. A. (2001) Bulk-compositional study of three lunar meteorites: Enigmatic siderophile element results for Dhofar 026 (abstract). In Lunar and Planet. Science XXXII, abstract no. 2197, Lunar and Planetary Institute, Houston.

Warren P. H., Ulff-Møller F., and Kallemeyn G. W. (2005) “New” lunar meteorites: Impact melt and regolith breccias and large-scale heterogeneities of the upper lunar crust. Meteoritics & Planetary Science 40, 989–1014.

Chemical Classification

Overview | Dhofar 026 et al.
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Prepared by:

Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don't contact me about the meteorite you think you’ve found until you read this and this.

e-mail: korotev@wustl.edu

Last revised: 10-Jul-2009