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Dhofar 1436
Basic information Name: Dhofar 1436
     This is an OFFICIAL meteorite name.
Abbreviation: Dho 1436
Observed fall: No
Year found: 2004
Country: Oman
Mass:help 24.2 g
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 89 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 14 Jan 2008
Revised 4 Aug 2008: final writeup
Writeuphelp
Writeup from MB 93:

Dhofar 1436                        18°25.4'N, 54°25.4'E

Dhofar, Oman

Find: 8 December 2004

Achondrite (lunar feldspathic impact-melt breccia)

History: This meteorite was discovered by an anonymous finder on a limestone plateau in the Dhofar region in Oman, far from other known lunar meteorites.

Physical characteristics: A single brownish green stone of 24.2 g total weight. Fusion crust is absent.

Petrography: (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.

Mineral 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 (both ‰).

Classification: Achondrite (lunar feldspathic impact-melt breccia); minor weathering. Specimens: A type specimen of 5.2 g and one thin section are on deposit at Vernad. An anonymous collector holds the main mass.

Submitted by: Marina Ivanova, Vernad.

Data from:
  MB93
  Table 8
  Line 42:
Origin or pseudonym:Oman, desert plain
Date:8-Dec-2004
Latitude:18°25.4'N
Longitude:54°25.4'E
Mass (g):24.2
Pieces:1
Class:Lunar
Type spec mass (g):5.2
Plots: O isotopes:  
Institutions
   and collections
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
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Geography:

Oman
Coordinates:
     Recommended::   (18° 25' 24"N, 54° 25' 24"E)

Statistics:
     This is 1 of 2131 approved meteorites from Zufar, Oman (plus 4 unapproved names)
     This is 1 of 3960 approved meteorites from Oman (plus 371 unapproved names)
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