Dhofar 1436 & 1443
of Dhofar 1436, Click on image for enlargement.
credit: Randy Korotev)
slice of Dhofar 1443. Click on image for enlargement
credit: Randy Korotev)
Meteoritical Bulletin, No. 93, Meteoritics
& Planetary Science 43,
Sultanate of Oman
Find: 2004 December 8
Mass: 24.2 g
meteorite (feldspathic impact melt breccia)
meteorite was discovered by an anonymous finder on a limestone plateau in
the Dhofar region of Sultanate of Oman, far from other known lunar
characteristics: A single brownish-green stone of 24.2 g
total weight. Fusion crust is absent.
(Lorenz C. and Nazarov M., Vernad) The meteorite
is an impact melt breccia, consisting of lithic and mineral clasts embedded
in a partly devitrified glassy matrix with abundant bubbles. The lithic
clasts are mainly impact melt breccias and rocks of anorthositic,
gabbro-anorthositic, and gabbro-noritic compositions. Granular breccia
clasts are also present. Lithic fragments range from 0.01 to 7 mm in size.
Major minerals are pyroxene and feldspar, with minor olivine. Accessories
are silica, chromite, ilmenite, Ca-phosphate, troilite and FeNi metal.
composition and geochemistry: (Lorenz C., Kononkova N., Vernad,
EMP): feldspar (An92.5-98.7Ab1.1-7.2); orthopyroxene
(En68.2-84.1Wo0.2-5.0; Fe/Mn 62); clinopyroxene (En13.4-63.7Wo12.8-40.5;
Fe/Mn 63); olivine (Fo42.6-72.7; Fe/Mn 96); spinel is
Al-Ti-chromite. Average glassy matrix composition: SiO2 = 45.1,
TiO2 = 0.26, Al2O3 = 30.8, FeO = 4.49, MgO
= 3.94, CaO = 16.7, Na2O = 0.48, K2O = 0.04 [all
wt%]. Oxygen Isotopes: (I. A. Franchi, OU) δ17O=3.286; δ18O=6.244
Lunar meteorite (feldspathic impact melt breccia): minor weathering.
A type specimen of 5.2 g and one thin section are on deposit at Vernad.
An anonymous collector holds the main mass.
Meteoritical Bulletin, No. 95, Meteoritics
& Planetary Science 44,
Find: 2001 April 12
Mass: 36.7 g
History: On April
12, 2001, one stone was found by an anonymous finder in the Dhofar region,
Oman. Some years later three further tiny fragments were found within a few
feet. The total mass of all stones is 36.7 g.
characteristics: The rock is slightly weathered and
relatively dark in hand specimen.
and mineralogy (A. Bischoff, IfP
and E. H. Haiderer, Vienna): typical anorthositic breccia with light
anorthositic clasts and abundant impact melt clasts embedded within a
tough, partially molten matrix. This mostly devitrified matrix contains
abundant vesicles and schlieren. Based on the optical appearance the rock
has some similarities with Dhofar 081, however, the coordinates do not
compositions: feldspar ranges from An83–98
with a mean of An94.8 ± 3.5; pyroxene is Fs12–49;
mean: Fs30 ± 9; and olivine is Fa19–52; mean: Fa35.5
Lunar (anorthositic breccia).
7.4 g and one polished thin section (IfP,
an anonymous collector holds the main mass.
1436 and Dhofar 1443 were collected <800 m from each other. They are
similar in appearance and identical in composition. We assume that they are
paired. Although JaH 348 is reported to have been collected 143 km away, it
is also similar in appearance and composition. The two meteorites might be
1436 | 1443
Schematic Map of the Find Locations of the
Dhofar Lunar Meteorites
E. V., Trieloff M., Hopp
J., Buykin A. I., and Korochantsev
A. V. (2009) 40Ar-39Ar
dating of solar gas-rich lunar meteorite Dhofar 1436 (abstract). 72th
Annual Meeting of the Meteoritical Society, number 5226.
Korochantseva E. V., Buikin A. I., Hopp J., Korochantsev A. V., and Trieloff
M. (2016) 40Ar-39Ar results of lunar meteorites Dhofar
025, 280, 309, 730, 733, 1436, 1442, SaU 449, NWA 6888
(abstract). 79th Annual Meeting of the Meteoritical Society, abstract no.
Korochantseva E. V., Buikin A. I., Verchovsky A.
B., Hopp J., Korochantsev
A. V., Anand M., and Trieloff M. (2017) Noble gas, N and C stepwise heating and
crushing data for the lunar meteorite Dhofar 1436. 80th Annual
Meeting of the Meteoritical Society, abstract no. 6258.
R. L. (2008) Using
composition to assess pairing relationships among lunaites. Goldschmidt
Conference Abstracts 2008, Geochimica
et Cosmochimica Acta 72,
12S, p. A492.
R. L. (2011) Lunar
meteorites from Antarctica and Oman (abstract). 74th Annual Meeting of
the Meteoritical Society, abstract no. 5073.
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. (2017) Update (2012–2017) on lunar meteorites
from Oman. Meteoritics
& Planetary Science 52, 1251-1256.
data on Omanian lunar meteorites.
R. L., Zeigler R. A., Irving A. J., and Bunch T. E. (2009) Keeping up
with the Lunar Meteorites - 2009 (abstract). In Lunar and Planetary
Science XL, abstract no. 1137, 40th Lunar and Planetary Science
R. L., Irving A. J., and Bunch T. E. (2012) Keeping Up With the Lunar Meteorites — 2012 (abstract). In Lunar and Planetary
Science XLIII, abstract no. 1152, 43rd Lunar and Planetary
M. A., Aranovich Ya.,
Demidova S. I., Ntaflos T., and Brandstätter F.
(2011) Aluminous enstatites of lunar meteorites and deep-seated lunar
19 (1), 13-25.
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