[meteorite-list] Chondritic parent bodies
From: Dave Gheesling <dave_at_meteoritecentral.com>
Date: Tue, 8 Sep 2009 23:40:04 -0400 Message-ID: <52188D695C9D463FB0C1A8D1DD3B278D_at_meteorroom> All, Pete's question re: pallasites reminds me of one I've been meaning to throw out to the group for a while. I believe that, by definition, L6's come from one parent body and L5's, say, come from another. It's clear why breccias might simply be an association of the two. But I've seen cross section illustrations of hypothetical asteroids more than once which indicate a transitional progression from L3 material at the exterior/crust through L4, then L5, and eventually to L6 at the center/core. Presumably this is due to insulative properties and the like towards the interior which allow more heat from radioactivity to build up, etc, but this also seems to indicate a single parent body. I'm sure Sterling & Co. might have a field day with this one, and I'm looking forward to any responses out there... Thanks much, Dave Dave Gheesling IMCA #5967 www.fallingrocks.com Received on Tue 08 Sep 2009 11:40:04 PM PDT |
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