[meteorite-list] ad : sale of a unique lodranite nwa4448

From: habibi abdelaziz <azizhabibi_at_meteoritecentral.com>
Date: Wed, 10 Jun 2009 07:20:11 -0700 (PDT)
Message-ID: <416362.1752.qm_at_web62006.mail.re1.yahoo.com>

hi all? and glusgot
here is one of the first lodranite found in nwa classified by doctr ted bunch there is 3 years;
its nwa 4448? a 57 gr stone very crystalised and unique in grain size and composotion..
enjoy photo
http://www.flickr.com/photos/azizhabibi/

aziz the habibiest

Northwest Africa 4448
?? Algeria
?? Found 2005
?? Achondrite (lodranite)
History and physical description: A 64 g dark brown stone with little fusion crust was found in Western Algeria in 2005 and purchased in Erfoud, Morocco in August 2006.
Petrography (T. Bunch and J. Wittke, NAU: A. Irving, UWS): Fine-to medium-grained stone (0.2 to 1.3 mm in dia., mean = 0.83 mm) with recrystallized polygonal and poikilitic textures (host orthopyroxene encloses olivine). Modal contents are (in vol. %): orthopyroxene, 68; olivine, 15; metal, 13; troilite, pyrrhotite, chromite, merrillite, and chlor-apatite, 4.0. Weathering grade is low and shock level is S2.?
Geochemistry: Orthopyroxene (Fs11.2Wo2.2, FeO/MnO = 18); olivine (Fa10.2, FeO/MnO = 20); metal, Ni = 5.4 wt %; pyrrhotite, Ni = 2.36 wt %; troilite, Ni = 0.56 wt %; chromite, cr# = 80; chlor-apatite (CaO = 55.6 wt %, P2O 5= 42.4 wt %, Cl = 2.4 wt %); merrillite (CaO = 47.5 wt %, P2O5 = 46.3 wt %, MgO = 3.7 wt % and Na2O = 2.9 wt %).
Oxygen isotopes: (D. Rumble, CIW):? a cleaned and metal-free sample was analyzed by laser fluorination. Replicate analyses are, respectively: D17O = -1.3291 and -1.3534, d17O = 0.539 and 0.442, and d18O = 3.551 and 3.413.
Classification:? Achondrite (lodranite).
Type specimens
habibi aziz? imca 6220
box 70 erfoud 52200 morroco
phone. 21235576145
fax.21235576170</font>


      
Received on Wed 10 Jun 2009 10:20:11 AM PDT