header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 20 Oct 2019
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:  
Lewis Cliff 86021
Basic information Name: Lewis Cliff 86021
     This is an OFFICIAL meteorite name.
Abbreviation: LEW 86021
Observed fall: No
Year found: 1986
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 326 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 11(1)  (1988)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.5/3.9
NHM Catalogue:  5th Edition  (2000)  L3.5/3.9
MetBase:  v. 7.1  (2006)  L3.5-3.9
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  L3.5-3.9
Recommended:  L3.5-3.9    [explanation]

This is the only approved meteorite classified as L3.5-3.9.
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Field number: 2332
Writeuphelp
Writeup from AMN 11(1):

Sample No.: LEW86021

Location: Lewis Cliff

Weight (g): 325.8

Field No.: 2332

Dimensions (cm): 6x6.5x4.5

Meteorite Type: L3 Chondrite

 

Macroscopic Description: Roberta Score

LEW86021 is a rounded specimen that is mostly covered with iridescent fusion crust. Evaporite deposit is present on some exterior surfaces. The interior of LEW86021 is heavily weathered. Large areas of orange oxidation are present in the otherwise red-brown interior. Some evaporite deposit developed on the interior surfaces after the stone dried in a nitrogen cabinet for several hours.

 

Thin Section (,5) Description: Brian Mason

The section shows a close-packed mass of chondrules (up to 2.7 mm across), chondrule fragments, and irregular crystalline aggregates, together with minor amounts of interstitial nickel-iron and troilite. A variety of chondrule types is present, including granular and porphyritic olivine and olivine-pyroxene, barred olivine, and radiating pyroxene. Weathering is extensive, with limonitic staining and areas of brown limonite throughout the section. Microprobe analyses give the following compositions: olivine, Fa18-28, mean Fa21 (CV FeO is 10); pyroxene, Fs4-17. The meteorite is an L3 chondrite (estimated L3.9).

Data from:
  MB76
  Table 2
  Line 3064:
Origin or pseudonym:Lower Ice Tongue
Mass (g):325.8
Class:L3.5/3.9
Weathering grade:Ce
Fayalite (mol%):18-28
Ferrosilite (mol%):4-17
Comments:NTL=36±2
Catalogs:
Search for specimens in the Smithsonian Institution collection (U.S.):   
    Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 11(1) (1988), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (84° 17'S, 161° 5'E)
     Recommended::   (84° 15' 14"S, 161° 21' 4"E)
Note: the NHM and MetBase coordinates are 4.4 km apart

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page