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Dhofar 225
Basic information Name: Dhofar 225
     This is an OFFICIAL meteorite name.
Abbreviation: Dho 225
Observed fall: No
Year found: 2001
Country: Oman
Mass:help 90 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  CM-an
Meteoritical Bulletin:  MB 86  (2002)  CM-an
MetBase:  v. 7.1  (2006)  CM-an
Recommended:  CM-an    [explanation]

This is 1 of 9 approved meteorites classified as CM-an.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Writeuphelp
Writeup from MB 86:

Dhofar 225

Oman

Found 2001 January 15

Carbonaceous chondrite (CM, anomalous)

A black stone weighing 90 g was found in the Dhofar region in Oman. Mineralogy and classification (M. A. Ivanova and M. A. Nazarov, Vernad; L. Taylor and A. Patchen, UTenn): fusion crust is distinct and black. Texturally the sample is similar to CM chondrites, consisting of fine-grained matrix, calcium-aluminum-rich inclusions (CAIs), irregularly-shaped olivine aggregates, and rare type I and II chondrules. Coarse-grained objects are surrounded by accretionary dust mantles. CAIs are mainly spinel-rich with perovskite, Al-diopside and forsterite surrounded by phyllosilicates; chondrules consist of olivine, very rare orthopyroxene embedded in completely altered mesostasis; type I chondrules and olivine aggregates contain kamacite blebs in forsterite; groundmass consists of phyllosilicates, isolated olivine grains (forsterite is dominant). Contains Ni-rich metal grains (up to 60 wt% of Ni), schreibersite, Ca-phosphates, sulfides (mostly pentlandite and pyrrhotite), chromite and escolaite; bulk chemistry: Fe/Si = 1.24, Mg/Si = 0.91, Al/Si = 0.093, low H2O contents.  Oxygen isotopic composition (R. N. Clayton, UChi): δ18O = +21.85‰, δ17O = +9.22‰. The oxygen isotopic composition, low Fe/Si ratio and low H2O content are atypical for CM chondrites. Specimens: type specimen, 19.7 g and two thin sections, Vernad; main mass is with the anonymous finder.

Data from:
  MB86
  Table 2
  Line 20:
Date:15 Jan 2001
Latitude:18°21.6'N
Longitude:54°11.3'E
Mass (g):90
Pieces:1
Class:CM anom
Classifier:M. A. Ivanova, M. A. Nazarov (Vernad) and L. Taylor, A. Patchen (UTenn)
Type spec mass (g):19.65
Plots: O isotopes:  
Institutions
   and collections
UChi: University of Chicago, Chicago, IL 60637, United States (institutional address; updated 28 Feb 2011)
UTenn: Planetary Geosciences Institute, Department of Earth and Planetary Sciences, University of Tennessee, 1412 Circle Drive, Knoxville, TN 37996-1410, United States (institutional address; updated 1 Nov 2011)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
Matteo Chinellato   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
akira1988   
Geography:

Oman
Coordinates:
     Catalogue of Meteorites:   (18° 22'N, 54° 11'E)
     Recommended::   (18° 21' 36"N, 54° 11' 18"E)
Note: the NHM and MetBase coordinates are 0.9 km apart

Statistics:
     This is 1 of 2119 approved meteorites from Zufar, Oman (plus 4 unapproved names)
     This is 1 of 3944 approved meteorites from Oman (plus 371 unapproved names)
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