MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 6 Aug 2022
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Basic information Name: Uasara
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: unknown
Country: Chile
Mass:help 3.14 kg
Meteoritical Bulletin:  MB 100  (2012)  Iron, IIAB 
Recommended:  Iron, IIAB    [explanation]

This is 1 of 145 approved meteorites classified as Iron, IIAB.   [show all]
Search for other: IIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 29 Feb 2012
Writeup from MB 100:


Antofagasta, Chile

Find date unknown

Classification: Iron meteorite (IIAB)

History: The seller stated that a woman found the meteorite on a path after seeing a fireball but the moderate weathering is inconsistent with this scenario. The location was between Antofagasta and the Andes. The name Uasara means desert in the Aymaran language spoken by the Aymara people of the Andes.

Petrography: (J.T. Wasson, UCLA) Two polished and etched specimens were examined; they show mottled textures with tiny (~0.1 mm) light and dark "stars", apparently the result of shock followed by reheating. There are compositional halos around sulfides and phosphides. One edge of the sample shows thick flow features that may have originated during atmospheric passage. One edge of the sample shows a very ragged oxidize surface with many pock marks. There are tiny (0.2- 1 mm) holes that pass from this surface into the polished and etched face 1 to 2 mm from the edge of the specimen. Rhabdites are small but common, typical of low-Au IIAB irons.

Geochemistry: 4.45 mg/g Co, 55.5 mg/g Ni, 59.5 μg/g Ga, 178 μg/g Ge, 3.76 μg/g As, 48.2 μg/g Ir, and 0.479 μg/g Au. All elements are within the fields defined by IIAB irons. The Ir content puts the meteorite near the high extreme where it joins two other irons from N. Chile, Sierra Gorda and Negrillos.

Classification: Iron, IIAB. This mass may be paired with Sierra Gorda or Negrillos or both. Given the uncertainty in the discovery location of the new iron, it may have been found near Sierra Gorda but the (poorly defined) location of Negrillos is 340 km distant from Sierra Gorda. The composition of the new iron is slightly closer to that of Negrillos. Because of uncertainty in the pairing, it is being treated as a new iron.

Specimens: 97.9 g type specimen, UCLA; main mass, T. Heitz.

Data from:
  Table 1
  Line 1924:
Place of purchase:Antofagasta
Mass (g):3140
Class:Iron, IIAB
Weathering grade:moderate
Classifier:J.T. Wasson, UCLA
Type spec mass (g):97.9
Type spec location:UCLA
Main mass:T. Heitz
Comments:Submitted by Wasson
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:


     This is 1 of 2272 approved meteorites from Antofagasta, Chile (plus 8 unapproved names) (plus 1 impact crater)
     This is 1 of 2301 approved meteorites from Chile (plus 15 unapproved names) (plus 1 impact crater)

Direct link to this page