[meteorite-list] RFS Picture: Julesburg

From: bernd.pauli at paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: 02 Mar 2007 21:31:30 UT
Message-ID: <DIIE.000000BB000017AF_at_paulinet.de>

Moni: "How can we not fall in love with rocks as these?"
Anne: "This is the smallest and the newest of the Julesburg bunch."

Julesburg, L3.6; L3.7;
Contains copper; S3; br;
Find 1983, Colorado, USA

A single mass of 57.9 kg was found in a landfill at Julesburg.

- abundant chondrules and chondrule fragments
- little fine-grained matrix
- clearly defined chondrules abundant
- glass within chondrules (clear, pale-brown, lilac)
- brecciated and shocked
- aluminum-rich spinels within chondrules and inclusions
- examination of main mass suggests three smaller
   individuals have spalled during ablative flight
- interior of the stone dark grey
- gross heterogeneity on cut surfaces and in thin sections
- a few rounded, light-grey, metal-poor inclusions
- veins of metal and sulphide
- light and dark material
- numerous chondrules indent each other
- some chondrules welded to adjacent silicates
- olivine phenocrysts in the darker areas
- metal grains p to 0.6 mm across and generally angular
- troilite is polycrystalline
- high-nickel metal: taenite with 38% Ni, tetrataenite with 49% Ni
- rare, pale-green inclusions (olivine and/or pyroxene)
- megachondrules and large clasts

Signed: Proud owner of a 43.5-gram slice* + thin section

* Purchased from Walter and Niki Zeitschel in 1987
Received on Fri 02 Mar 2007 04:31:30 PM PST