|Basic information||Name: Dhofar 1627|
This is an OFFICIAL meteorite name.
Abbreviation: Dho 1627
Observed fall: No
Year found: 2010
Mass: 86.1 g
This is 1 of 116 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites
|Comments:||Approved 9 Jan 2012|
Writeup from MB 100:
Dhofar 1627 (Dho 1627) 19°0.645’N, 54°32.246’E
Classification: Lunar meteorite (feldspathic breccia)
History: An 86.1g stone was found in the desert.
Physical characteristics: The stone lacks a fusion crust and shows fractures on the surface. The interior is rich in angular or slightly rounded clasts (to 1 cm). Some clasts are dark gray, a few are white, and the matrix is stained red by hematite.
Petrography: (S. Seddio and B. Jolliff, WUSL) A polished 18.1 mm by 8.75 mm section reveals rounded or subrounded lithic clasts of very fine grained, glassy matrix impact-melt breccia and poikilitic melt breccia fragments plus mineral clasts, welded together to form a well-consolidated, clast-rich breccia. Lithic clasts range from feldspathic, aphanitic, glassy-matrix breccias to somewhat more mafic granulitic clasts in which poikiloblastic pyroxene encloses plagioclase grains. Such clasts are abundant and typically contain partially resorbed magnesian (~Fo75) olivine grains. Plagioclase mineral clasts and grains in lithic clasts are partially converted to maskelynite and are coarsely fractured where crystalline. Fine feldspathic glass veins transect some clasts. Lithic clasts and mineral grains contain fractures, but fractures tend to be healed and closed at grain boundaries. Some of the larger fractures have been filled with terrestrial calcite, celestite, and Fe-oxide or Fe-oxyhydroxide, especially near Fe-Ni metal grains.
Geochemistry: The most abundant minerals include plagioclase (An87.2-98.6Ab1.4-8.9Or<0.1-4.3), low-Ca pyroxene (En64.1-77.0Fs17.6-33.3Wo2.6-11.2, Fe/Mn=41-70), high-Ca pyroxene (En34.8-49.9Fs13.2-30.5Wo34.7-38.8, Fe/Mn=50-70), and olivine (Fo64.2-75.9, Fe/Mn=76-118). Fe-Ni metal, troilite, merrillite, and poikilitic ilmenite surround crystals of plagioclase and pyroxene. Most Fe-Ni metal grains (up to 1-mm in size) are rimmed by iron oxide/oxyhydroxide. Bulk composition (R. Korotev, WUSL): 0.54% Na2O; 5.8% FeO, 530 ppm Ni, 1000 ppm Sr, 7.8 ppm Sm, 2.7 ppm Th.
Classification: Achondrite (lunar clast-rich melt breccia).
Specimens: 17.2 g is on deposit at WUSL. The main mass is held by the anonymous finder.
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
|References:||Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)|
This is 1 of 2034 approved meteorites from Zufar, Oman (plus 3 unapproved names)
This is 1 of 3826 approved meteorites from Oman (plus 300 unapproved names)
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