header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 22 Nov 2020
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Dar al Gani 1023
Basic information Name: Dar al Gani 1023
     This is an OFFICIAL meteorite name.
Abbreviation: DaG 1023
Observed fall: No
Year found: 1999
Country: Libya
Mass:help 149 g
Classification
  history:
Meteoritical Bulletin:  MB 87  (2003)  Ureilite-pmict
MetBase:  v. 7.1  (2006)  Ureilite-pmict
Recommended:  Ureilite-pmict    [explanation]

This is 1 of 27 approved meteorites classified as Ureilite-pmict.   [show all]
Search for other: Achondrites, Ureilites
Writeuphelp
Writeup from MB 87:

Dar al Gani 1023

Libya

Found 1999 summer

Achondrite (ureilite, polymict)

A stone of 149 g was found by an anonymous collector in the Dar al Gani desert. Mineralogy and classification (H. Takeda, Chiba; T. Ishii and M. Ohtsuki, UTok): fragmental breccia, with lithic and mineral clasts embedded in a cataclastic matrix of predominantly ureilitic material. Lithic clasts and fragments include mafic ureilitic material (olivine 86 vol% and pyroxene 12 vol%), Na-rich plagioclase fragments and rare subrounded, dark brown Na-, K-rich glassy grain (SiO2 68 wt%, Al2O3 13.6 wt%, MgO 5.6 wt%, CaO 5.3 wt%, Na2O 6.3 wt%, K2O 0.8 wt%). The pyroxene composition ranges from En79Wo6 to En62Wo4 and En59Wo31; olivine composition ranges from Fo90 to Fo75. The plagioclase composition ranges from An13Ab85 to An33Ab62. A slice of a lithic clast of 3.7 × 2.7 cm in size (sub-sample ,02; 6.89 g slice), is one of the most heavily shocked ureilites known. All mafic silicates are converted into very fine grained materials with a granoblastic texture; carbonaceous vein materials are lost from many grain boundaries; glassy shock-vein materials are observed at some parts of the thin section. Olivine (80 vol%) is more abundant than pyroxene (20%). Pyroxene composition ranges from En86Wo2 to En77Wo10 and En69Wo6; olivine composition ranges from Fo96 to Fo66. The stone is weathered, with a brownish color in hand specimen, but in thin section the weathering grade appears to be very low. Specimens: type specimen, 20.75 g (including sample, 02), NSMT, one thin section, Chiba; main mass with anonymous finder.

Data from:
  MB87
  Table 7
  Line 76:
Date:1999
Latitude:27°1.55'N
Longitude:16°23.27'E
Mass (g):149
Pieces:1
Class:Ure pm
Classifier:National Science Museum, 3–23–1 Hyakunin-cho, Shinjuku-ku, Tokyo, 169–0073, Japan
Type spec mass (g):20.752
Institutions
   and collections
UTok: Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan (institutional address; updated 5 Nov 2011)
Chiba: Chiba Institute of Technology, Tsudanuma, Narashino, Chiba 275-0016, Japan (institutional address)
NSMT: National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, JAPAN, Japan; Website (institutional address; updated 16 Jun 2014)
Catalogs:
References: Published in Meteoritical Bulletin, no. 87, MAPS 38, A189-A248 (2003)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
Geography:

Libya
Coordinates:
     Recommended::   (27° 1' 33"N, 16° 23' 16"E)

Statistics:
     This is 1 of 1046 approved meteorites from Al Jufrah, Libya
     This is 1 of 1505 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page