>Hi Kevin! I´ve never seen a orbicular granite but I´ve seen a orbicular diorite (so called "Klotgranit") near Slättemossa/Sweden. Diorites have more plagioclase and only a few of the quartz amount of a granite. If you mean granite type called "Rapakiwi" (rounded K-feldspar with plagioclase rims) I´ve seen such stuff also in Sweden. I think there is not much known about the genesis of this textures (only a lot of discussions). But I´m very sure that their origin is not related to chondrites, cause they are differentiated rocks and chondrites are not. So granites and diorites a generated in a differentiated crust of a big body (planet or planetoid), chondrites are not formed in a crust like invironment. If there´re some questions left, feel free to ask.
Best Wishes Ingo/Germany --- Ursprüngliche Nachricht --- > Von: "Kevin Forbes" <[EMAIL PROTECTED]> > An: [email protected] > Betreff: [meteorite-list] Orbicular granite and chondrites > Datum: Sat, 10 Sep 2005 19:14:13 +1000 > > Hi list, > has anyone ever seen orbicular granite? > Is the formation of this material related to the formation of chondritic > meteorites in any way? > Cheers, Kevin, VK3UKF. > > > ______________________________________________ > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > -- Lust, ein paar Euro nebenbei zu verdienen? Ohne Kosten, ohne Risiko! Satte Provisionen für GMX Partner: http://www.gmx.net/de/go/partner ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
