[meteorite-list] SHATTERCONES in TATAHOUINE
I had a chance to cherry pick some larger sized Tatahouine nuggets from Alan Carion at the Tucson show and have noticed what appear to be shattercones on many of the facets? On every side that is fractured there are these chevron shaped interlaced lamellae/ flaring striationshowever they don't seem to have just one apex of orientation. On one surface I can see a cluster leading to the top as an apex point only to be met with one splitting the others going the opposite direction and also creating a small platform. It does make sense to me that Tathouine would exhibit this given its broken safety glass terminal deployment. I think the largest piece found was the size of a small grapefruit and if you tapped it with a hammer it would shatter into the smaller chunks we see more commonly. I guess what I am saying is that this mass in space must have been a heavily fractured structure and subject to multiple impact incidents followed by annealing then more impacts leaving over time heat and pressure multi directional percussion striation. In essence shattercones. Does anyone else see this? Any write ups on it that you are aware of? Got any examples in your collections that show what I am talking about? Let me here your thoughts please. I am stuck in an endless winter with plenty of time to ponder such things. I am aware that they may just be the natural clevage lines of the various minerals within.. but then why don't I see this anywhere near as dramatic in other meteorites? It would be neat to think of Tathouine as not just a unique Dioginite but also as some kind of relict impactite from the crust of another asteroid. ??? You can see some pictures here that I took through my microscope at 25x https://plus.google.com/photos/107261840007598315830/albums/5852125796528297633 Thanks- Paul Gessler __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SHATTERCONES in TATAHOUINE
Hi Paul and List, We were discussing this in Tucson with Norm Lehrman at the IMCA dinner. I have taken some pictures as well that will be in my Jim's Fragments article coming out in a couple days in Meteorite Times. The shattercones are visible in larger pieces with the naked eye and are a fascinating feature. You are correct also about the orientation of the cones it seems that they are arranged in several different and intermixed ways. I took some high resolution photographs and have included two in the article which we hope everyone will enjoy. We are pretty excited about this too. Hope to see more information about what this records of the powerful event which drove Tatahoine from its parent body. Jim Tobin - Original Message From: Paul Gessler cetu...@shaw.ca To: meteorite-list meteorite-list@meteoritecentral.com Sent: Wed, March 6, 2013 1:45:23 AM Subject: [meteorite-list] SHATTERCONES in TATAHOUINE I had a chance to cherry pick some larger sized Tatahouine nuggets from Alan Carion at the Tucson show and have noticed what appear to be shattercones on many of the facets? On every side that is fractured there are these chevron shaped interlaced lamellae/ flaring striationshowever they don't seem to have just one apex of orientation. On one surface I can see a cluster leading to the top as an apex point only to be met with one splitting the others going the opposite direction and also creating a small platform. It does make sense to me that Tathouine would exhibit this given its broken safety glass terminal deployment. I think the largest piece found was the size of a small grapefruit and if you tapped it with a hammer it would shatter into the smaller chunks we see more commonly. I guess what I am saying is that this mass in space must have been a heavily fractured structure and subject to multiple impact incidents followed by annealing then more impacts leaving over time heat and pressure multi directional percussion striation. In essence shattercones. Does anyone else see this? Any write ups on it that you are aware of? Got any examples in your collections that show what I am talking about? Let me here your thoughts please. I am stuck in an endless winter with plenty of time to ponder such things. I am aware that they may just be the natural clevage lines of the various minerals within.. but then why don't I see this anywhere near as dramatic in other meteorites? It would be neat to think of Tathouine as not just a unique Dioginite but also as some kind of relict impactite from the crust of another asteroid. ??? You can see some pictures here that I took through my microscope at 25x https://plus.google.com/photos/107261840007598315830/albums/5852125796528297633 Thanks- Paul Gessler __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SHATTERCONES in TATAHOUINE
Paul, Jim, and All, Interesting how paths of interest converge from time to time I have had a long fascination with Tat horsetails. I mentioned this in a note to the list on the occasion of Tatahouine's 80th anniversary of arrival (Sun, Jun 26, 2011: Subject: [meteorite-list] 80th Anniversary of the arrival of a Green Alien from Space!). My fantasy has been that these are shattercones from the impact on Vesta---perhaps the only shattercones we have from someplace other than earth. Cheers, Norm www.tektitesource.com - Original Message From: James Tobin jamespa...@att.net To: Paul Gessler cetu...@shaw.ca Cc: Meteorite-list@meteoritecentral.com Sent: Wed, March 6, 2013 6:46:40 AM Subject: Re: [meteorite-list] SHATTERCONES in TATAHOUINE Hi Paul and List, We were discussing this in Tucson with Norm Lehrman at the IMCA dinner. I have taken some pictures as well that will be in my Jim's Fragments article coming out in a couple days in Meteorite Times. The shattercones are visible in larger pieces with the naked eye and are a fascinating feature. You are correct also about the orientation of the cones it seems that they are arranged in several different and intermixed ways. I took some high resolution photographs and have included two in the article which we hope everyone will enjoy. We are pretty excited about this too. Hope to see more information about what this records of the powerful event which drove Tatahoine from its parent body. Jim Tobin - Original Message From: Paul Gessler cetu...@shaw.ca To: meteorite-list meteorite-list@meteoritecentral.com Sent: Wed, March 6, 2013 1:45:23 AM Subject: [meteorite-list] SHATTERCONES in TATAHOUINE I had a chance to cherry pick some larger sized Tatahouine nuggets from Alan Carion at the Tucson show and have noticed what appear to be shattercones on many of the facets? On every side that is fractured there are these chevron shaped interlaced lamellae/ flaring striationshowever they don't seem to have just one apex of orientation. On one surface I can see a cluster leading to the top as an apex point only to be met with one splitting the others going the opposite direction and also creating a small platform. It does make sense to me that Tathouine would exhibit this given its broken safety glass terminal deployment. I think the largest piece found was the size of a small grapefruit and if you tapped it with a hammer it would shatter into the smaller chunks we see more commonly. I guess what I am saying is that this mass in space must have been a heavily fractured structure and subject to multiple impact incidents followed by annealing then more impacts leaving over time heat and pressure multi directional percussion striation. In essence shattercones. Does anyone else see this? Any write ups on it that you are aware of? Got any examples in your collections that show what I am talking about? Let me here your thoughts please. I am stuck in an endless winter with plenty of time to ponder such things. I am aware that they may just be the natural clevage lines of the various minerals within.. but then why don't I see this anywhere near as dramatic in other meteorites? It would be neat to think of Tathouine as not just a unique Dioginite but also as some kind of relict impactite from the crust of another asteroid. ??? You can see some pictures here that I took through my microscope at 25x https://plus.google.com/photos/107261840007598315830/albums/5852125796528297633 Thanks- Paul Gessler __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SHATTERCONES in TATAHOUINE
Yes, many of my specimens display this feature. Now that you mention it, it reminds me of improperly annealed material that is under stress. In other words the cooling happened very rapidly from above the annealing point (not necessarily liquid) to below the annealing point. Mendy -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Paul Gessler Sent: Wednesday, March 06, 2013 1:35 AM To: meteorite-list Subject: [meteorite-list] SHATTERCONES in TATAHOUINE I had a chance to cherry pick some larger sized Tatahouine nuggets from Alan Carion at the Tucson show and have noticed what appear to be shattercones on many of the facets? On every side that is fractured there are these chevron shaped interlaced lamellae/ flaring striationshowever they don't seem to have just one apex of orientation. On one surface I can see a cluster leading to the top as an apex point only to be met with one splitting the others going the opposite direction and also creating a small platform. It does make sense to me that Tathouine would exhibit this given its broken safety glass terminal deployment. I think the largest piece found was the size of a small grapefruit and if you tapped it with a hammer it would shatter into the smaller chunks we see more commonly. I guess what I am saying is that this mass in space must have been a heavily fractured structure and subject to multiple impact incidents followed by annealing then more impacts leaving over time heat and pressure multi directional percussion striation. In essence shattercones. Does anyone else see this? Any write ups on it that you are aware of? Got any examples in your collections that show what I am talking about? Let me here your thoughts please. I am stuck in an endless winter with plenty of time to ponder such things. I am aware that they may just be the natural clevage lines of the various minerals within.. but then why don't I see this anywhere near as dramatic in other meteorites? It would be neat to think of Tathouine as not just a unique Dioginite but also as some kind of relict impactite from the crust of another asteroid. ??? You can see some pictures here that I took through my microscope at 25x https://plus.google.com/photos/107261840007598315830/albums/5852125796528297 633 Thanks- Paul Gessler __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
