Re: [meteorite-list] Spade Versus Estacado
Sorry Adam, I got mixed up with all that talk of 1000 NWA and only one melt, etc. Michael on 8/29/03 11:29 AM, Adam Hupe at [EMAIL PROTECTED] wrote: Hi Michael and List, I was not questioning Matt's integrity at all. Both meteorites were found in Texas less than 35 miles apart and are very similar in appearance. Since finely metal-grained H6s with dark matrixes and low shock are rare I feel a pairing must be considered. In any case both Spade and Estacado are beautiful stones. All the best, Adam - Original Message - From: Michael L Blood [EMAIL PROTECTED] To: Adam Hupe [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Friday, August 29, 2003 11:29 AM Subject: Re: [meteorite-list] Spade Versus Estacado Bernd's observations and opinion are good enough for this cowboy. Also, isn't Matt's meteorite a US find? Matt's integrity is beyond question in my book. Michael on 8/29/03 9:00 AM, Adam Hupe at [EMAIL PROTECTED] wrote: Dear List Members, If somebody wants to sell an Estacado specimen and a Spade specimen to us at the Denver show we would be happy to donate them to a world class researcher who will also be at the show for comparative purposes. We are in the process of working with several laboratories to sort out NWA pairings (mainly the stony-irons) and have provided several samples to each facility. We have found that shock and weathering levels amongst other things are variable even from the same strewn field in many cases. The evenly disbursed, fine-grained metal gives Estacado the appearance that there is more metal than there actually is. I have only seen this texture in one other H chondrite and that is NWA 1792 before looking at Spade. Add the darkened matrix and you have a pretty stunning looking meteorite. After cutting thousands of NWA meteorites I have only seen this texture once, in my opinion making it rare. I think all suspected pairings should be investigated to keep the books clean, so to speak. All the best, Adam Hupe - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, August 29, 2003 8:38 AM Subject: [meteorite-list] Spade Versus Estacado Hello once again, Another possible inconsistency: My Estacado thin section measures 2.3 x 1.6 cm (3.68 cm^2) and I found at least 7 relict POP chondrules and 1 relict, barred chondrule. This would also be in clear contrast to A.E. Rubin's statement: The impact melt origin of [Spade] is indicated by the low modal abundances of relict chondrules (1.8 vol.%) ... Bernd __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list Reality is that which, when you stop believing in it, doesn't go away. Philip K. Dick -- SUPPORT OUR TROUPS: http://www.takebackthemedia.com/onearmy.html -- Worth Seeing: - Earth at night from satellite: http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg - Interactive Lady Liberty: http://doody36.home.attbi.com/liberty.htm - Earth - variety of choices: http://www.fourmilab.ch/earthview/vplanet.html -- Panoramic view of Meteor Crater: http://www.virtualguidebooks.com/Arizona/GrandCanyonRoute66/MeteorCrater/Met eorCraterRimL.html -- Cool Calendar Clock: http://www.yugop.com/ver3/stuff/03/fla.html -- Michael Blood Meteorites Didgeridoos for sale at: http://www.michaelbloodmeteorites.com/ Reality is that which, when you stop believing in it, doesn't go away. Philip K. Dick -- SUPPORT OUR TROUPS: http://www.takebackthemedia.com/onearmy.html -- Worth Seeing: - Earth at night from satellite: http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg - Interactive Lady Liberty: http://doody36.home.attbi.com/liberty.htm - Earth - variety of choices: http://www.fourmilab.ch/earthview/vplanet.html -- Panoramic view of Meteor Crater: http://www.virtualguidebooks.com/Arizona/GrandCanyonRoute66/MeteorCrater/Met eorCraterRimL.html -- Cool Calendar Clock: http://www.yugop.com/ver3/stuff/03/fla.html -- Michael Blood Meteorites Didgeridoos for sale at: http://www.michaelbloodmeteorites.com/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Spade Versus Estacado
Adam and Greg, The picture (below) on Martin's site does support the similar appearance. If so, then Estacado is a special meteorite also...based on Dr. Rubin's analysis of Spade. Also, 35 miles does seem like a big strewn field but certainly not a stretch (to me) to be the same material. A pairing evaluation would be interesting. www.meteorite.com/gallery/estacado.htm John Dear List Members, I find the resemblance between Spade and Estacado remarkably indistinguishable. They are both from Texas and are both H6s. Has anybody checked for a pairing? All the best, Adam and Greg Hupe IMCA 2185 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
RE: [meteorite-list] Spade Versus Estacado
Hi Adam: I suggest you pick up a piece of Spade and have a thin section made. Maybe you are correct. But as we all know, the look of the cut face can be quite deceiving vs. the thin section and chemical composition. Furthermore Estacado is 35 mi away and is an S1, not S2-S3 like Spade. I suspect the two are not paired. Researchers? Matt Morgan http://www.mhmeteorites.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Adam Hupe Sent: Thursday, August 28, 2003 6:31 PM To: [EMAIL PROTECTED] Subject: [meteorite-list] Spade Versus Estacado Dear List Members, I find the resemblance between Spade and Estacado remarkably indistinguishable. They are both from Texas and are both H6s. Has anybody checked for a pairing? All the best, Adam and Greg Hupe IMCA 2185 __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Spade Versus Estacado
Tom wrote: I would guess if the two are only 35 miles apart that they are the same meteorite. I think it is time to hunt between the two !!! IF they are really paired, this would imply that several stones may have fallen. The Estacado main mass weighs 290 kg, the Spade single mass weighs 8.86 kg. Thus a hypothetical strewn field ellipse might stretch from somewhere between Hart Camp and Littlefield for the smaller masses to increasingly larger masses toward Estacado (all of these places north of Lubbock*, TX) with the center line of the hypothetical strewn field ellipse running from Spade via Abernathy / Heckville to Estacado. *Lubbock is an L5 chondrite Regards, Bernd To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Spade Versus Estacado
Hello again, I just studied my Estacado thin section (that I purchased from AL Mitterling in 1999) under crossed polars and compared the extinction behavior of its olivine crystals to the description given in A. Rubin's paper: ... olivine in Spade currently exhibits undulose extinction and lacks planar fractures, characteristic of shock stage S2. The olivine grains in my Estacado thin section exhibit sharp optical extinction which is consistent with shock-stage S1, and Estacado has been assigned a shock stage of S1 (see also Matt's comment). This result would preclude a possible pairing of Spade and Estacado. Bernd __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Spade Versus Estacado
Hello once again, Another possible inconsistency: My Estacado thin section measures 2.3 x 1.6 cm (3.68 cm^2) and I found at least 7 relict POP chondrules and 1 relict, barred chondrule. This would also be in clear contrast to A.E. Rubin's statement: The impact melt origin of [Spade] is indicated by the low modal abundances of relict chondrules (1.8 vol.%) ... Bernd __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Spade Versus Estacado
Dear List Members, If somebody wants to sell an Estacado specimen and a Spade specimen to us at the Denver show we would be happy to donate them to a world class researcher who will also be at the show for comparative purposes. We are in the process of working with several laboratories to sort out NWA pairings (mainly the stony-irons) and have provided several samples to each facility. We have found that shock and weathering levels amongst other things are variable even from the same strewn field in many cases. The evenly disbursed, fine-grained metal gives Estacado the appearance that there is more metal than there actually is. I have only seen this texture in one other H chondrite and that is NWA 1792 before looking at Spade. Add the darkened matrix and you have a pretty stunning looking meteorite. After cutting thousands of NWA meteorites I have only seen this texture once, in my opinion making it rare. I think all suspected pairings should be investigated to keep the books clean, so to speak. All the best, Adam Hupe - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, August 29, 2003 8:38 AM Subject: [meteorite-list] Spade Versus Estacado Hello once again, Another possible inconsistency: My Estacado thin section measures 2.3 x 1.6 cm (3.68 cm^2) and I found at least 7 relict POP chondrules and 1 relict, barred chondrule. This would also be in clear contrast to A.E. Rubin's statement: The impact melt origin of [Spade] is indicated by the low modal abundances of relict chondrules (1.8 vol.%) ... Bernd __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Spade Versus Estacado
The problem is that everyone is jonesing for another strewnfield after the spectacular PF fall. Hope springs eternal, yadda yadda... Tracy Latimer From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: [meteorite-list] Spade Versus Estacado Date: 29 Aug 2003 15:38:48 UT Hello once again, Another possible inconsistency: My Estacado thin section measures 2.3 x 1.6 cm (3.68 cm^2) and I found at least 7 relict POP chondrules and 1 relict, barred chondrule. This would also be in clear contrast to A.E. Rubin's statement: The impact melt origin of [Spade] is indicated by the low modal abundances of relict chondrules (1.8 vol.%) ... Bernd __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list _ Get MSN 8 and enjoy automatic e-mail virus protection. http://join.msn.com/?page=features/virus __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Spade Versus Estacado
Bernd's observations and opinion are good enough for this cowboy. Also, isn't Matt's meteorite a US find? Matt's integrity is beyond question in my book. Michael on 8/29/03 9:00 AM, Adam Hupe at [EMAIL PROTECTED] wrote: Dear List Members, If somebody wants to sell an Estacado specimen and a Spade specimen to us at the Denver show we would be happy to donate them to a world class researcher who will also be at the show for comparative purposes. We are in the process of working with several laboratories to sort out NWA pairings (mainly the stony-irons) and have provided several samples to each facility. We have found that shock and weathering levels amongst other things are variable even from the same strewn field in many cases. The evenly disbursed, fine-grained metal gives Estacado the appearance that there is more metal than there actually is. I have only seen this texture in one other H chondrite and that is NWA 1792 before looking at Spade. Add the darkened matrix and you have a pretty stunning looking meteorite. After cutting thousands of NWA meteorites I have only seen this texture once, in my opinion making it rare. I think all suspected pairings should be investigated to keep the books clean, so to speak. All the best, Adam Hupe - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, August 29, 2003 8:38 AM Subject: [meteorite-list] Spade Versus Estacado Hello once again, Another possible inconsistency: My Estacado thin section measures 2.3 x 1.6 cm (3.68 cm^2) and I found at least 7 relict POP chondrules and 1 relict, barred chondrule. This would also be in clear contrast to A.E. Rubin's statement: The impact melt origin of [Spade] is indicated by the low modal abundances of relict chondrules (1.8 vol.%) ... Bernd __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list Reality is that which, when you stop believing in it, doesn't go away. Philip K. Dick -- SUPPORT OUR TROUPS: http://www.takebackthemedia.com/onearmy.html -- Worth Seeing: - Earth at night from satellite: http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg - Interactive Lady Liberty: http://doody36.home.attbi.com/liberty.htm - Earth - variety of choices: http://www.fourmilab.ch/earthview/vplanet.html -- Panoramic view of Meteor Crater: http://www.virtualguidebooks.com/Arizona/GrandCanyonRoute66/MeteorCrater/Met eorCraterRimL.html -- Cool Calendar Clock: http://www.yugop.com/ver3/stuff/03/fla.html -- Michael Blood Meteorites Didgeridoos for sale at: http://www.michaelbloodmeteorites.com/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Spade Versus Estacado
Hi Michael and List, I was not questioning Matt's integrity at all. Both meteorites were found in Texas less than 35 miles apart and are very similar in appearance. Since finely metal-grained H6s with dark matrixes and low shock are rare I feel a pairing must be considered. In any case both Spade and Estacado are beautiful stones. All the best, Adam - Original Message - From: Michael L Blood [EMAIL PROTECTED] To: Adam Hupe [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Friday, August 29, 2003 11:29 AM Subject: Re: [meteorite-list] Spade Versus Estacado Bernd's observations and opinion are good enough for this cowboy. Also, isn't Matt's meteorite a US find? Matt's integrity is beyond question in my book. Michael on 8/29/03 9:00 AM, Adam Hupe at [EMAIL PROTECTED] wrote: Dear List Members, If somebody wants to sell an Estacado specimen and a Spade specimen to us at the Denver show we would be happy to donate them to a world class researcher who will also be at the show for comparative purposes. We are in the process of working with several laboratories to sort out NWA pairings (mainly the stony-irons) and have provided several samples to each facility. We have found that shock and weathering levels amongst other things are variable even from the same strewn field in many cases. The evenly disbursed, fine-grained metal gives Estacado the appearance that there is more metal than there actually is. I have only seen this texture in one other H chondrite and that is NWA 1792 before looking at Spade. Add the darkened matrix and you have a pretty stunning looking meteorite. After cutting thousands of NWA meteorites I have only seen this texture once, in my opinion making it rare. I think all suspected pairings should be investigated to keep the books clean, so to speak. All the best, Adam Hupe - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, August 29, 2003 8:38 AM Subject: [meteorite-list] Spade Versus Estacado Hello once again, Another possible inconsistency: My Estacado thin section measures 2.3 x 1.6 cm (3.68 cm^2) and I found at least 7 relict POP chondrules and 1 relict, barred chondrule. This would also be in clear contrast to A.E. Rubin's statement: The impact melt origin of [Spade] is indicated by the low modal abundances of relict chondrules (1.8 vol.%) ... Bernd __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list Reality is that which, when you stop believing in it, doesn't go away. Philip K. Dick -- SUPPORT OUR TROUPS: http://www.takebackthemedia.com/onearmy.html -- Worth Seeing: - Earth at night from satellite: http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg - Interactive Lady Liberty: http://doody36.home.attbi.com/liberty.htm - Earth - variety of choices: http://www.fourmilab.ch/earthview/vplanet.html -- Panoramic view of Meteor Crater: http://www.virtualguidebooks.com/Arizona/GrandCanyonRoute66/MeteorCrater/Met eorCraterRimL.html -- Cool Calendar Clock: http://www.yugop.com/ver3/stuff/03/fla.html -- Michael Blood Meteorites Didgeridoos for sale at: http://www.michaelbloodmeteorites.com/ __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Spade Versus Estacado
Adam, Michael and especially Matt, I received a part slice of Spade from Matt today and I have to say that it is an extraordinary meteorite. In my collection I have nice slices of melts that include Chico(L6), Sahara 98362(H6), Dhofar 010(H6), Gao?(H5? from Eric Olsen), and a nice small cut up individual from NWA(unclassified) that are all superb. Spade is easily nicer than all of these materials. I do not have Cat Mountain but from the pictures I've seen, Spade is nicer than it in my opinion. Spade does not appear to have areas that are more melted than other areas like Cat Mountain and Dhofar 010 do. The intimate mix of lots of nice metal with the blackened matrix is just beautiful. Especially the polished side. The fractured edges have more of a glassy gray-metal look to it. The vesicles are evident but not as numerous as some melts. My piece has some vein-like areas where the metal is discontinuous but definitely in a pattern. Relic chondrules and inclusions are few and far between. (a thin section would be a better way to check for those) If Estacado is paired with Spade then it must be a favorite meteorite for others. Spade sure looks like unique material...though my experience is somewhat limited. Thanx for the opportunity Matt, John Hi Michael and List, I was not questioning Matt's integrity at all. Both meteorites were found in Texas less than 35 miles apart and are very similar in appearance. Since finely metal-grained H6s with dark matrixes and low shock are rare I feel a pairing must be considered. In any case both Spade and Estacado are beautiful stones. All the best, Adam - Original Message - From: Michael L Blood [EMAIL PROTECTED] To: Adam Hupe [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Friday, August 29, 2003 11:29 AM Subject: Re: [meteorite-list] Spade Versus Estacado Bernd's observations and opinion are good enough for this cowboy. Also, isn't Matt's meteorite a US find? Matt's integrity is beyond question in my book. Michael on 8/29/03 9:00 AM, Adam Hupe at [EMAIL PROTECTED] wrote: Dear List Members, If somebody wants to sell an Estacado specimen and a Spade specimen to us at the Denver show we would be happy to donate them to a world class researcher who will also be at the show for comparative purposes. We are in the process of working with several laboratories to sort out NWA pairings (mainly the stony-irons) and have provided several samples to each facility. We have found that shock and weathering levels amongst other things are variable even from the same strewn field in many cases. The evenly disbursed, fine-grained metal gives Estacado the appearance that there is more metal than there actually is. I have only seen this texture in one other H chondrite and that is NWA 1792 before looking at Spade. Add the darkened matrix and you have a pretty stunning looking meteorite. After cutting thousands of NWA meteorites I have only seen this texture once, in my opinion making it rare. I think all suspected pairings should be investigated to keep the books clean, so to speak. All the best, Adam Hupe - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, August 29, 2003 8:38 AM Subject: [meteorite-list] Spade Versus Estacado Hello once again, Another possible inconsistency: My Estacado thin section measures 2.3 x 1.6 cm (3.68 cm^2) and I found at least 7 relict POP chondrules and 1 relict, barred chondrule. This would also be in clear contrast to A.E. Rubin's statement: The impact melt origin of [Spade] is indicated by the low modal abundances of relict chondrules (1.8 vol.%) ... Bernd __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list Reality is that which, when you stop believing in it, doesn't go away. Philip K. Dick -- SUPPORT OUR TROUPS: http://www.takebackthemedia.com/onearmy.html -- Worth Seeing: - Earth at night from satellite: http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg - Interactive Lady Liberty: http://doody36.home.attbi.com/liberty.htm - Earth - variety of choices: http://www.fourmilab.ch/earthview/vplanet.html -- Panoramic view of Meteor Crater: http://www.virtualguidebooks.com/Arizona/GrandCanyonRoute66/MeteorCrater/Met eorCraterRimL.html -- Cool Calendar Clock: http://www.yugop.com/ver3/stuff/03/fla.html -- Michael Blood Meteorites Didgeridoos for sale at: http://www.michaelbloodmeteorites.com
