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Lunar Meteorite

Dhofar 026, Dhofar 457 through 468, and Dhofar 1669 (paired stones)

Oman

 

Dhofar 026

(photo credit: ?)

 

Dhofar 4xx stones in the field

(photo credit: Luc Labenne)

 

A small slab of Dhofar 026. Tick mark spacing: 1 mm.

(photo credit: Randy Korotev)

 

A small slice of Dhofar 461

(photo credit: Randy Korotev)

 

Dhofar 1669 in the field

(photo credit: anonymous finder)

 

Two sides of an end cut of Dhofar 1669

(photo credit: Randy Korotev)

 

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

Dhofar 026

Oman
Found: 2000 March 6
Mass: 148 g

Lunar meteorite (anorthositic crystalline melt breccia)

A brownish gray stone weighing 148 g was found in the Dhofar region of Oman.

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.


* Randy's note: The find locations are separated by 20 km. On the basis of composition and cosmic-ray exposure histories, the meteorites are not paired.

 

from The Meteoritical Bulletin, No. 89, Meteoritics & Planetary Science 40, A201–A263 (2005)

Dhofar 457-468

 

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

 

from The Meteoritical Bulletin, No. 101

Dhofar 1669

Zufar, Oman
Found: 2010 Nov 19
Mass: 3.3 g

Lunar meteorite (feldspathic breccia)

History: Found by an anonymous prospector on November 19, 2010.

Physical characteristics: A single gray stone (3.3 g) without fusion crust.

Petrography: (A Irving and S. Kuehner, UWS) Very fine grained breccia composed of abundant anorthite with olivine, pigeonite, subcalcic augite, Ti-rich chromite, troilite, kamacite and a Cr-Ni-Fe phase.

Geochemistry: Olivine (Fa38.8-39.6, FeO/MnO = 106-109), pigeonite (Fs28.8Wo8.1, FeO/MnO = 50), subcalcic augite (Fs17.4Wo33.4, FeO/MnO = 50), plagioclase (An96.0-97.2Or0.1).

Classification: Lunar (feldspathic breccia).

Specimens: A total of 0.66 g of type material is on deposit at WUSL (0.53 g) and UWB (0.13 g). The main mass is held by an anonymous collector.

 

More Information

Meteoritical Bulletin Database

Dhofar 026 | 457 | 458 | 459 | 460 | 461 | 462 | 463 | 464 | 465 | 466 | 467 | 468 | 1669

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.

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.

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.

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.

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. (2011) Lunar meteorites from Antarctica and Oman (abstract). 74th Annual Meeting of the Meteoritical Society, abstract no. 5073..

Korotev R. L. (2012) Lunar meteorites from Oman. Meteoritics & Planetary Science 47, 1365–1402. doi: 10.1111/j.1945-5100.2012.01393.x

Korotev R. L and Irving A. J. (2013) Keeping up with the lunar meteorites - 2013 (abstract). In Lunar and Planetary Science XLIV, abstract no. 1216.

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.

Nazarov M. A., Badyukov D. D., Lorents K.A., Demidova. S. I. (2004) The flux of lunar meteorites onto the earth, Solar System Research 38, 49-58.

Nishiizumi K. (2003) Exposure histories of lunar meteorites (abstract). In Evolution of Solar System Materials: A New Perspective from Antarctic Meteorites, p. 104, National Institute of Polar Research, Tokyo.

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.

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.

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.

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.

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.

Zhang A., Hsu W., Li X., Ming H., Li Q., Liu Y., and Tang G. (2011) Polycrystalline zircon in lunar meteorite Dhofar 458: Origin and implications (abstract). In Lunar and Planetary Science XLII, abstract no. 2805.

Zhang A.-C., Hsu W.-B., Li X.-H., Ming H.-L., Li Q.-L., Liu Y, and Tang G.-Q. (2011) Impact melting of lunar meteorite Dhofar 458: Evidence from polycrystalline texture and decomposition of zircon. Meteoritics and Planetary Science 46, 103-115.

 

 

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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: 7-Oct-2015