[meteorite-list] RFSPOD, July 02, 2011, Bjurböle

[Bernd V. Pauli]

Hello All,

Greg wrote:

"7mm chondrule protruding from the edge of the 37.3-gram cut fragment measuring
 45mm x 42mm x 13mm. I acquired it from a private collection while in Europe."

That's a beautiful specimen with a gorgeous "megachondrule" ! My NWA 6719 (LL4) from Gary Fujihara has a similar but somewhat smaller chondrule protruding from the edge of my 2.19 gr crusted endcut. It measures 5.8 x 3.75 mm.

Greg inquired:

"What are the statistics of meteorites having 'native copper'?"

According to a 1994 article in METEORITICS by A.E. Rubin, at least 66% of
the ordinary chondrites contain metallic copper. Alan wrote the following (excerpt):

"Metallic Cu of moderately high purity (~985 mg/g Cu, ~15 mg/g Ni) occurs in
 at least 66% of ordinary chondrites (OC) heterogeneously distributed, small
(typically ≤ 20 µm) rounded to irregular grains."

Reference:

Rubin A.E. (1994) Metallic copper in ordinary chondrites (MAPS 29-1, 1994, pp. 93-98).

Best wishes,

Bernd