HAH 237 / Bencubbinite

NAME: Hammadah al Hamra TYPE: Carbonaceous chondrite, Bencubbin group, Subgroup B, petrologic type 3, brecciated, metal rich (shock S3, weathering grade W2) COUNTRY: Libya CO-ORDINATES: 28°36.56’N, 12°02.95’E DATE OF FIND: 1997 T. K.W: 3.173Kg (one piece) A stone was found in the desert, D.Weber, priv. comm., 1998. Description, mineralogy and bulk chemistry, an unusually metal-rich (60-70% FeNi) carbonaceous chondrite breccia, related to CH chondrites, such as Acfer 182, ALH 85085, and also related to Bencubbin, Weatherford and the CR chondrites, J.Zipfel et al., LPSC 29, 1998, abs. #1417. Listed, J.N.Grossman, Met. Bull. 82, MAPS, 1998, 33, p.A221. Oxygen isotopic composition very similar to Bencubbin, M.K.Weisberg et al., MAPS, 1998, 33, p.A166 (abs.). Study of zoned metal, M.K.Weisberg and M.Prinz, Papers 24th Symp. Ant. Met., NIPR Tokyo, 1999, p.187 (abs.). Hydrogen, nitrogen and carbon isotopic compositions, contains heavy nitrogen and can be classified as a bencubbinite. Meteorite data copied from MetBase 7.0 for Windows. Author: Joern Koblitz, The MetBase Library of Meteoritics and Planetary Sciences, Benquestrasse 27, D-28209 Bremen, Germany Phone: +49 421 24 100 24 Fax: +49 421 24 100 99