header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 14 Jun 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:  
Pecora Escarpment 01023
Basic information Name: Pecora Escarpment 01023
     This is an OFFICIAL meteorite name.
Abbreviation: PCA 01023
Observed fall: No
Year found: 2002
Country: Antarctica [Collected by Planetary Studies Foundation (US)]
Mass:help 20.9 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  EH4
Recommended:  EH4    [explanation]

This is 1 of 20 approved meteorites classified as EH4.   [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Approved 19 Jan 2012
Writeuphelp
Writeup from MB 100:

Pecora Escarpment 01023 (PCA 01023)        85°39.190’S, 68°36.190’W

Antarctica

Found: 2002 Jan 18

Classification: Enstatite chondrite (EH4)

Petrography: Small, separated well-formed RP chondrules and some mineral fragments set in a dark red-brown to black matrix. A single forsterite grain was found. Accessory minerals include daubreelite, troilite (some Ni-bearing), Ni-poor metal, caswellsilverite and albite. Only one olivine grain found. Kamacite contains 2.8 to 3.1 wt% Si and 2.8 to 3.5 wt% Ni.

Geochemistry: Orthopyroxene Fs0.5Wo0.5; Fs4.5Wo4.7, olivine Fa0.05

Classification: EH4. Almost identical to PCA 01027 and very likely paired with it.

Specimens: Remaining stone plus one polished thin section at FMNH

Data from:
  MB100
  Table 1
  Line 1763:
Origin or pseudonym:Pecora Escarpment
Date:2002 Jan 18
Latitude:85°39.190'S
Longitude:68°36.190'W
Mass (g):20.9
Pieces:1
Class:EH4
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):0.05
Ferrosilite (mol%):0.5; 4.5
Wollastonite (mol%):0.5; 4.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.9
Type spec location:FMNH
Main mass:FMNH
Finder:E. Tilenius
Comments:Submitted by P. Sipiera
Institutions
   and collections
FMNH: Department of Geology The Field Museum of Natural History 1400 South Lake Shore Drive Chicago, IL 60605-2496, USA, United States; Website (institutional address; updated 16 Nov 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Antarctica
Coordinates:
     Recommended::   (85° 39' 11"S, 68° 36' 11"W)

Statistics:
     This is 1 of 38937 approved meteorites from Antarctica (plus 5051 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page