New Mars Meteorite Found In Morocco (NWA 1950) Below an excerpt from Meteoritical Bulletin 88-2 that announces the discovery of a new Mars meteorite found in Morocco, NWA 1950. This increases the number of Mars meteorites to 29.
http://www.jpl.nasa.gov/snc Ron Baalke ---------------------------------------------------------------------------- THE METEORITICAL BULLETIN Announcement 88-2, October 23, 2003 Sara Russell, Editor ([EMAIL PROTECTED]) Jutta Zipfel, Assoc. Ed. for Northwest Africa ([EMAIL PROTECTED]) Luigi Folco, Assoc. Ed. for Africa ([EMAIL PROTECTED]) Monica Grady, Assoc. Ed. for Oman ([EMAIL PROTECTED]) Rhian Jones, Assoc. Ed. for the Americas ([EMAIL PROTECTED]) Tim McCoy, Assoc. Ed. for Antarctica ([EMAIL PROTECTED]) Jeffrey N. Grossman, Assoc. Ed. for Web ([EMAIL PROTECTED]) This is the second electronic announcement of new meteorites to be published in Meteoritical Bulletin, No. 88, 2004 July. Martian meteorite: Northwest Africa 1950 Shergottite (Morocco) [see below] The preliminary text of the 2004 Meteoritical Bulletin, including all of the above meteorites, may by viewed at: http://www.meteoriticalsociety.org/bulletin/mb88.pdf All information in this announcement and on the above-cited Meteoritical Bulletin webpage is subject to revision until final publication in the summer of 2004. ================================================================ ANNOUNCEMENTS ================================================================ [snip] Northwest Africa 1950 Morocco Found 2001 January and March Martian meteorite (lherzolitic shergottite) Two stones (414 and 383 g) were found in the Atlas mountains (Morocco) in 2001 January and March. The exact location of find is unknown. The meteorite is a cumulate peridotitic rock consisting of olivine (~ 55 vol%), low and high-Ca pyroxenes (~ 35 vol%) and plagioclase glass (~ 8 vol%). Accessory minerals include phosphates (merrillite), chromite and spinels (inclusions in olivines and pyroxenes), sulfides (pyrrhotite), and a glass rich in potassium.The igneous texture is very similar to that of the ALHA77005. Classification and mineralogy (Ph. Gillet, ENSL, J.A. Barrat, UAng, M. Bohn, Ifremer): pyroxenes are pigeonite, En78Fs19Wo2-En60Fs26Wo14, and augite, En53Fs16Wo31-En45Fs14Wo41; maskelynite ranges from An57Ab41Or1 to An40Ab57Or3. The key element weight-ratios FeO*/MnO is close to 30 for pigeonite and close to 50 for olivines. Geochemistry: REE pattern similar to that of ALHA77005 but with higher values. Specimens: type specimen, 20 g, ENSL; main mass, Fectay. [snip] ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
