Re: [meteorite-list] Question about NWA 869
Hi Melanie, I was lucky enough to get a dinner plate sized 895 gram slice of NWA 869 from Blaine Reed back in 2008. I asked him and the mass he cut to produce it weighed 84 pounds, just short of 40kg. Not sure if anyone out there knows of a larger one. The Metoritical Bulletin just says individual masses to 20kg. Best, Jim Baxter - Original Message - From: Melanie Matthews miss_meteor...@yahoo.ca To: MeteoriteList meteorite-list@meteoritecentral.com Sent: Friday, November 4, 2011 5:28:12 PM GMT -08:00 US/Canada Pacific Subject: Re: [meteorite-list] Question about NWA 869 How big is/was the largest NWA869 mass found? --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Question about NWA 869
Hi list, Are there any estimates in how long ago this wonderful meteorite fell to Earth, and how large it might have been before it entered the atmosphere? It must have been a massive meteoroid, much larger than the one that produced the Buzzard Coulees. --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Question about NWA 869
NWA 869 represents an L chondritic regolith breccia containing preirradiated components. The meteoroid had an initial radius of about 2 m with a mass of about 110 metric tons. The transit time to Earth was about 4-5 Ma. Large variations of shielding depths between samples indicate that break-up of the meteoroid must have occured high in atmosphere. This would also explain the large inferred ablation loss, which is typical for large chondrite showers. Ref: The L3-6 Regolith Breccia Northwest Africa 869: Petrology, Noble Gases, and Cosmogenic Radionuclides Metzler, K.; Ott, U.; Welten, K. C.; Caffee, M. W.; Franke, L. 39th Lunar and Planetary Science Conference, (Lunar and Planetary Science XXXIX), held March 10-14, 2008 in League City, Texas. LPI Contribution No. 1391., p.1120 Publication Date: 03/2008 http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1120.pdf -Original Message- From: Melanie Matthews miss_meteor...@yahoo.ca To: MeteoriteList meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 2:10 am Subject: [meteorite-list] Question about NWA 869 Hi list, Are there any estimates in how long ago this wonderful meteorite fell to Earth, and how large it might have been before it entered the atmosphere? It must have been a massive meteoroid, much larger than the one that produced the Buzzard Coulees. --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Question about NWA 869
PS Referencing the same article that considered the free floating for 4-5 million year 869-parent meteoroid, also commented that the age of some of the regolith soil/glue that formed the fantastically brecciated meteoroid of our envy had itself exposure time of as long as 16 million years: Assuming that 4 Ma is the time of transit irradiation, several lithologies have been preirradiated up to 16 Ma in the parent body regolith. -Original Message- From: MexicoDoug mexicod...@aim.com To: miss_meteorite miss_meteor...@yahoo.ca; meteorite-list meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 3:49 am Subject: Re: [meteorite-list] Question about NWA 869 NWA 869 represents an L chondritic regolith breccia containing preirradiated components. The meteoroid had an initial radius of about 2 m with a mass of about 110 metric tons. The transit time to Earth was about 4-5 Ma. Large variations of shielding depths between samples indicate that break-up of the meteoroid must have occured high in atmosphere. This would also explain the large inferred ablation loss, which is typical for large chondrite showers. Ref: The L3-6 Regolith Breccia Northwest Africa 869: Petrology, Noble Gases, and Cosmogenic Radionuclides Metzler, K.; Ott, U.; Welten, K. C.; Caffee, M. W.; Franke, L. 39th Lunar and Planetary Science Conference, (Lunar and Planetary Science XXXIX), held March 10-14, 2008 in League City, Texas. LPI Contribution No. 1391., p.1120 Publication Date: 03/2008 http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1120.pdf -Original Message- From: Melanie Matthews miss_meteor...@yahoo.ca To: MeteoriteList meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 2:10 am Subject: [meteorite-list] Question about NWA 869 Hi list, Are there any estimates in how long ago this wonderful meteorite fell to Earth, and how large it might have been before it entered the atmosphere? It must have been a massive meteoroid, much larger than the one that produced the Buzzard Coulees. --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Question about NWA 869
] Question about NWA 869 Hi list, Are there any estimates in how long ago this wonderful meteorite fell to Earth, and how large it might have been before it entered the atmosphere? It must have been a massive meteoroid, much larger than the one that produced the Buzzard Coulees. --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Question about NWA 869
NWA 869 is a very sexy meteorite.. i would marry it if i could. Daniel Furlan __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Question about NWA 869
NWA 869 is a very sexy meteorite, I would marry it if i could. Daniel Furlan __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Question about NWA 869
Found this: Scientists figure the meteoroid that was blasted off the parent body was maybe 4 to 5 meters in diameter before atmospheric entry. Even with ablation loss of 90 to 95% about 7 tons dropped on the Sahara Desert. http://www.meteorite-times.com/micro-visions/nwa-869-inclusions/ --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. - Original Message - From: MexicoDoug mexicod...@aim.com To: miss_meteor...@yahoo.ca; meteorite-list@meteoritecentral.com Cc: Sent: Friday, November 4, 2011 1:03:47 AM Subject: Re: [meteorite-list] Question about NWA 869 PS Referencing the same article that considered the free floating for 4-5 million year 869-parent meteoroid, also commented that the age of some of the regolith soil/glue that formed the fantastically brecciated meteoroid of our envy had itself exposure time of as long as 16 million years: Assuming that 4 Ma is the time of transit irradiation, several lithologies have been preirradiated up to 16 Ma in the parent body regolith. -Original Message- From: MexicoDoug mexicod...@aim.com To: miss_meteorite miss_meteor...@yahoo.ca; meteorite-list meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 3:49 am Subject: Re: [meteorite-list] Question about NWA 869 NWA 869 represents an L chondritic regolith breccia containing preirradiated components. The meteoroid had an initial radius of about 2 m with a mass of about 110 metric tons. The transit time to Earth was about 4-5 Ma. Large variations of shielding depths between samples indicate that break-up of the meteoroid must have occured high in atmosphere. This would also explain the large inferred ablation loss, which is typical for large chondrite showers. Ref: The L3-6 Regolith Breccia Northwest Africa 869: Petrology, Noble Gases, and Cosmogenic Radionuclides Metzler, K.; Ott, U.; Welten, K. C.; Caffee, M. W.; Franke, L. 39th Lunar and Planetary Science Conference, (Lunar and Planetary Science XXXIX), held March 10-14, 2008 in League City, Texas. LPI Contribution No. 1391., p.1120 Publication Date: 03/2008 http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1120.pdf -Original Message- From: Melanie Matthews miss_meteor...@yahoo.ca To: MeteoriteList meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 2:10 am Subject: [meteorite-list] Question about NWA 869 Hi list, Are there any estimates in how long ago this wonderful meteorite fell to Earth, and how large it might have been before it entered the atmosphere? It must have been a massive meteoroid, much larger than the one that produced the Buzzard Coulees. --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Question about NWA 869
Yes Mel, John's 4-5 meters in diameter statement corresponds to the average 2 meter radius in the reference. FYI, a typical entering meteoroid that experiences a loss of 92.5% (the factor of its material ton ablation as concluded by the authors) would drop this much material for our collections: diameter (meters)max recoverable mass 0.12 kg 0.350 0.5 200 1.0 1.7 ton 1.5 5.9 2.014 2.527 3.047 3.575 4.0 112 4.5 159 5.0 218 Of course the factor of 92.5% loss will vary depending on the angle it enters, speed, composition and integrity, as well as the initial size and shape, so they are all gross estimates. Kindest wishes Doufg -Original Message- From: Melanie Matthews miss_meteor...@yahoo.ca To: MexicoDoug mexicod...@aim.com; meteorite-list meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 12:42 pm Subject: Re: [meteorite-list] Question about NWA 869 Found this: Scientists figure the meteoroid that was blasted off the parent body was maybe 4 to 5 meters in diameter before atmospheric entry. Even with ablation loss of 90 to 95% about 7 tons dropped on the Sahara Desert. http://www.meteorite-times.com/micro-visions/nwa-869-inclusions/ --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. - Original Message - From: MexicoDoug mexicod...@aim.com To: miss_meteor...@yahoo.ca; meteorite-list@meteoritecentral.com Cc: Sent: Friday, November 4, 2011 1:03:47 AM Subject: Re: [meteorite-list] Question about NWA 869 PS Referencing the same article that considered the free floating for 4-5 million year 869-parent meteoroid, also commented that the age of some of the regolith soil/glue that formed the fantastically brecciated meteoroid of our envy had itself exposure time of as long as 16 million years: Assuming that 4 Ma is the time of transit irradiation, several lithologies have been preirradiated up to 16 Ma in the parent body regolith. -Original Message- From: MexicoDoug mexicod...@aim.com To: miss_meteorite miss_meteor...@yahoo.ca; meteorite-list meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 3:49 am Subject: Re: [meteorite-list] Question about NWA 869 NWA 869 represents an L chondritic regolith breccia containing preirradiated components. The meteoroid had an initial radius of about 2 m with a mass of about 110 metric tons. The transit time to Earth was about 4-5 Ma. Large variations of shielding depths between samples indicate that break-up of the meteoroid must have occured high in atmosphere. This would also explain the large inferred ablation loss, which is typical for large chondrite showers. Ref: The L3-6 Regolith Breccia Northwest Africa 869: Petrology, Noble Gases, and Cosmogenic Radionuclides Metzler, K.; Ott, U.; Welten, K. C.; Caffee, M. W.; Franke, L. 39th Lunar and Planetary Science Conference, (Lunar and Planetary Science XXXIX), held March 10-14, 2008 in League City, Texas. LPI Contribution No. 1391., p.1120 Publication Date: 03/2008 http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1120.pdf -Original Message- From: Melanie Matthews miss_meteor...@yahoo.ca To: MeteoriteList meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 2:10 am Subject: [meteorite-list] Question about NWA 869 Hi list, Are there any estimates in how long ago this wonderful meteorite fell to Earth, and how large it might have been before it entered the atmosphere? It must have been a massive meteoroid, much larger than the one that produced the Buzzard Coulees. --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Question about NWA 869
Just saw Zelimir's informative post from yesterday, if that is what he does for 869, he must have the world's best megadocumebnted collection ;-), like we all aspire. I need a correction to what I just posted a few minutes ago: I gave the amount lost to ablation in the prior post, the correct numbers for the amount dropped as meteorites are as follws and Dean Bessey's estimate for NWA 869 of 7 tons of rocks in the strewn field and fits just right for the diameters/radii given in the paper and by John, diameter (meters)max recoverable mass 0.1 0.14kg 0.3 3.8 0.5 18 1.0 141 1.5 477 2.0 1.1ton 2.5 2.2 3.0 3.8 3.5 6.1 4.0 9.0 4.5 13 5.0 18 Nice to keep these numbers in mind when we think about our well cared for boxes of space chocolates! If NWA 869 were a limited fall the prices would have sent it right back to the cosmos ... something to think about. Nice to think about next time you see your wife/husband/boy/girlfriend! Best Doug -Original Message- From: MexicoDoug mexicod...@aim.com To: meteorite-list meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 1:58 pm Subject: Re: [meteorite-list] Question about NWA 869 Yes Mel, John's 4-5 meters in diameter statement corresponds to the average 2 meter radius in the reference. FYI, a typical entering meteoroid that experiences a loss of 92.5% (the factor of its material ton ablation as concluded by the authors) would drop this much material for our collections: diameter (meters)max recoverable mass 0.12 kg 0.350 0.5 200 1.0 1.7 ton 1.5 5.9 2.014 2.527 3.047 3.575 4.0 112 4.5 159 5.0 218 Of course the factor of 92.5% loss will vary depending on the angle it enters, speed, composition and integrity, as well as the initial size and shape, so they are all gross estimates. Kindest wishes Doufg -Original Message- From: Melanie Matthews miss_meteor...@yahoo.ca To: MexicoDoug mexicod...@aim.com; meteorite-list meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 12:42 pm Subject: Re: [meteorite-list] Question about NWA 869 Found this: Scientists figure the meteoroid that was blasted off the parent body was maybe 4 to 5 meters in diameter before atmospheric entry. Even with ablation loss of 90 to 95% about 7 tons dropped on the Sahara Desert. http://www.meteorite-times.com/micro-visions/nwa-869-inclusions/ --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. - Original Message - From: MexicoDoug mexicod...@aim.com To: miss_meteor...@yahoo.ca; meteorite-list@meteoritecentral.com Cc: Sent: Friday, November 4, 2011 1:03:47 AM Subject: Re: [meteorite-list] Question about NWA 869 PS Referencing the same article that considered the free floating for 4-5 million year 869-parent meteoroid, also commented that the age of some of the regolith soil/glue that formed the fantastically brecciated meteoroid of our envy had itself exposure time of as long as 16 million years: Assuming that 4 Ma is the time of transit irradiation, several lithologies have been preirradiated up to 16 Ma in the parent body regolith. -Original Message- From: MexicoDoug mexicod...@aim.com To: miss_meteorite miss_meteor...@yahoo.ca; meteorite-list meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 3:49 am Subject: Re: [meteorite-list] Question about NWA 869 NWA 869 represents an L chondritic regolith breccia containing preirradiated components. The meteoroid had an initial radius of about 2 m with a mass of about 110 metric tons. The transit time to Earth was about 4-5 Ma. Large variations of shielding depths between samples indicate that break-up of the meteoroid must have occured high in atmosphere. This would also explain the large inferred ablation loss, which is typical for large chondrite showers. Ref: The L3-6 Regolith Breccia Northwest Africa 869: Petrology, Noble Gases, and Cosmogenic Radionuclides Metzler, K.; Ott, U.; Welten, K. C.; Caffee, M. W.; Franke, L. 39th Lunar and Planetary Science Conference, (Lunar and Planetary Science XXXIX), held March 10-14, 2008 in League City, Texas. LPI Contribution No. 1391., p.1120 Publication Date: 03/2008 http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1120.pdf -Original Message- From: Melanie Matthews miss_meteor...@yahoo.ca To: MeteoriteList meteorite-list@meteoritecentral.com Sent: Fri, Nov 4, 2011 2:10 am Subject: [meteorite-list] Question about NWA 869 Hi list, Are there any estimates in how long ago this wonderful meteorite fell to Earth, and how large it might have been
Re: [meteorite-list] Question about NWA 869
How big is/was the largest NWA869 mass found? --- -Melanie MetMel - avid meteorite collector/enthusiast from Canada! IMCA#: 2975 eBay: metmel2775 I eat, sleep and breath meteorites 24/7. __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
