|Latitude & Longitude (WGS84):||26° 35' 26'' North , 12° 57' 7'' West|
|Latitude & Longitude (decimal):||26.59083,-12.95222|
|Other regions containing this locality:||Northwest Africa Meteorites|
Sahara Desert, North Africa
|Locality type:||Meteorite Fall Location|
|Meteorite Class:||Anomalous EH7 chondrite meteorite|
|Meteoritical Society Class:||EH7-an|
|Metbull:||View entry in Meteoritical Bulletin Database|
|Köppen climate type:||BWh : Hot deserts climate|
Primitive Enstatite Achondrite [or Shock-melted Enstatite Chondrite]
1990 fall. 2 pieces, 410g and 4310g.
After a striking burst of light-and-sound, a 410 g stone was recovered by a nomad. A decade later a 4.31 kg stone was recovered — and the news of Itqiy spread. The dominant constituent of Itqiy is enstatite accompanied by kamacite (~ 25 vol%) and tiny kamacite-sulfide intergrowths. The very reduced mineralogy, the oxygen isotopes, and the cosmic ray exposure age all indicate that Itqiy is a member of the Enstatite-rich meteorite clan, initially described as an Enstatite chondrite, but beyond that classification is elusive. The enstatite resembles that of EL chondrites, but the metal is closer in composition to that of EH chondrites. Furthermore, Itqiy lacks chondrules and chondrule relics. This may be entirely due to impact melting from pre-terrestrial shock, but that is a hypothesis — not a conclusion. To begin with there is apparently no consensus on the level of shock.
The actual issues are deeper than that. Over two decades ago Klaus Keil (1989) argued that the Enstatite meteorites were derived from a minimum of four parent bodies (EH and EL chondrites, normal aubrites, and the Shallowater parent body). Recently, however, it has become increasingly difficult to accommodate several Enstatite meteorites into the four homeworld framework. Worlds which have been completely melted (e.g., Happy Canyon, Itqiy, NWA 2526) are especially difficult to understand. First, disentangling the effects of internally generated metamorphism from external shock(s) is difficult. Secondly, it is not clear whether all of the Enstatite-rich oddballs are derived from the four putative homeworlds. Recently, Keil and Bischoff (2008) have proposed that Itqiy and NWA 2526 may be derived from a fifth parent body.
Good Initial Reference:
Patzer, A., Hill, D. H. & Boynton, W. V. (2001) Itqiy: A metal-rich enstatite meteorite with achondritic texture, Meteoritics & Planetary Science 36 (11): 1495-1505. (Nov 2001).
9 valid minerals.
Meteorite/Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
2.588 - 66 Ma
2.588 - 23.03 Ma
|Cenozoic sedimentary rocks|
Age: Neogene (2.588 - 23.03 Ma)
Lithology: Sedimentary rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
|Eocene - Paleocene|
33.9 - 66 Ma
Age: Paleogene (33.9 - 66 Ma)
Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3.