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Dhofar 1670
Basic information Name: Dhofar 1670
     This is an OFFICIAL meteorite name.
Abbreviation: Dho 1670
Observed fall: No
Year found: 2011
Country: Oman
Mass:help 590 g
Meteoritical Bulletin:  MB 101  (2012)  H4
Recommended:  H4    [explanation]

This is 1 of 6147 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 15 Sep 2012
Writeup from MB 101:

Dhofar 1670 (Dho 1670)        18°32’22.5"N, 54°34’24.9"E

Zufar, Oman

Found: January 2011

Classification: Ordinary chondrite (H4)

Petrography: (P. Strickland, UAb) Approximately 75 vol% chondrules, 15 vol% matrix, and 10 vol% metals/opaque minerals. Chondrules have an average diameter of 0.8 mm and display radial pyroxene, cryptocrystalline, and porphyritic olivine-pyroxene textures. The cryptocrystalline and radial pyroxene chondrules are well-defined while the porphyritic chondrules appear less readily delineated. Chondrule glass is absent as it has mostly transitioned into secondary feldspars observable up to 25 μm. Matrix is recrystallized and transparent with observable grain sizes. Olivine and pyroxene grains display strong undulatory extinction and also contain abundant irregular and planar fractures. There is also weak mosaic olivine and opaque shock veins, indicating moderate-strong shock (S4). Heavy oxidation of metals and sulfides, abundant Fe-oxide veinlets, and dominant rusty-staining of the specimen indicate moderate weathering (W3).

Geochemistry: (C. Herd and P. Strickland, UAb) Olivine Fa19.1±1.4 (n=52); Low-Ca Pyroxene Fs17.3±1.6 Wo1.5±1.1 (n=34); Augite Fs20.1±7.8 Wo25.0±5.5 (n=4).

Classification: Ordinary chondrite (H4). Classified based on average and standard deviation of Fa and Fs content in olivine and low-Ca pyroxene respectively.

Specimens: 27.0 g type specimen, including polished thin section, are on deposit at UAb. Main mass at SQU.

Data from:
  Table 0
  Line 0:
Date:Jan 2011
Mass (g):590.1
Shock stage:S4
Weathering grade:W3
Fayalite (mol%):19.1±1.4 (n=52)
Ferrosilite (mol%):17.3±1.6 (n=34)
Wollastonite (mol%):1.5±1.1
Classifier:C. Herd and P. Strickland, UAb
Type spec mass (g):26.7
Type spec location:UAb
Main mass:SQU
Comments:Field number O-15; submitted by C. Herd
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
SQU: Sultan Qaboos University, College of Science, Earth Sciences Department, P.O. Box 36 Code 123 Al­Khoud, Oman (institutional address; updated 5 Oct 2014)
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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     Recommended::   (18° 32' 22"N, 54° 34' 25"E)

     This is 1 of 2166 approved meteorites from Zufar, Oman (plus 22 unapproved names)
     This is 1 of 3999 approved meteorites from Oman (plus 434 unapproved names)
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