[meteorite-list] Antarctic meteorites yield global bombardment rate
Antarctic meteorites yield global bombardment rate By Jonathan Amos, BBC News, April 30, 2020 https://www.bbc.com/news/science-environment-52465237 This open access paper is: G.W. Evatt, A.R.D. Smedley, K.H. Joy, L. Hunter, W.H. Tey, I.D. Abrahams, and L. Gerrish, 2020, The spatial flux of Earth’s meteorite falls found via Antarctic data. geology. https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G46733.1/584575/The-spatial-flux-of-Earth-s-meteorite-falls-found Yours, Paul H. __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Antarctic meteorites found buried a foot beneath ice's surface
Using Landmine Detectors, Meteorite Hunt Turns Up 36 Space Rocks in Antarctica. The scientists had a hunch that more meteorites were hidden a foot below the ice—they were right https://www.smithsonianmag.com/smart-news/same-tech-used-hunt-landmines-searching-antarctic-meteorites-180971593/ Yours, Paul H. __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Antarctic Meteorites
Antarctic Meteorites http://www.rosssea.info/meteorites.html This an article of Ross Sea Information http://www.rosssea.info/index.html Yours, Paul H. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Antarctic meteorites
Hi Doug, all - It is NOT about the meteorites and it NEVER was. That's pretty much it. Years ago everyone decided that they really didn't want to fight over the Antarctic's resources, and the meteorite rules are just an extension to that. Which leaves those with really rare specimens in a position to work out trades, providing they have the right contacts. As far as any acadmic exclusive claim to meteorites goes, if some of the academics had half as good an understanding of meteorites as many of the list members here, then they might have a case. As it is, the meteorites get recovered, the true specialists get their identification samples, the collectors get theirs, the educators get theirs, etc... The only place where I do have a real problem is with both the nom com and some dealers. The First Peoples in the Americas often had names for major meteorites which were later stolen during the conquest, and all of this is often completely ignored or belittled by those blinded by their lust for meteorites. good hunting all, E.P. Grondine Man and Impact in the Americas __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Antarctic meteorites
Greetings E.P., and List, While we're on this topic, a related question I've tried to answer myself, but have come up short with what I've read: It is well documented that for many years the Eskimo/Inuit people were clever enough to make many tools from the metal chipped off the Cape York meteorite. Considering all the wonderfully sharp edges covering the Willamette meteorite, is there any evidence, other than folklore, that this meteorite was appreciated by ancient peoples in a practical way? Any scratches in the metal that can be attributed to its worship? Any tools with metal originating from it? Sincerely, Pete Date: Wed, 14 May 2008 13:45:15 -0700 From: [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Antarctic meteorites Hi Doug, all - It is NOT about the meteorites and it NEVER was. That's pretty much it. Years ago everyone decided that they really didn't want to fight over the Antarctic's resources, and the meteorite rules are just an extension to that. Which leaves those with really rare specimens in a position to work out trades, providing they have the right contacts. As far as any acadmic exclusive claim to meteorites goes, if some of the academics had half as good an understanding of meteorites as many of the list members here, then they might have a case. As it is, the meteorites get recovered, the true specialists get their identification samples, the collectors get theirs, the educators get theirs, etc... The only place where I do have a real problem is with both the nom com and some dealers. The First Peoples in the Americas often had names for major meteorites which were later stolen during the conquest, and all of this is often completely ignored or belittled by those blinded by their lust for meteorites. good hunting all, E.P. Grondine Man and Impact in the Americas __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list _ __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Antarctic Meteorites - A couple questions
Hi List, Besides ALH76009, can anyone tell me how many other Antarctic meteorite samples made it on the collectors market before the International Treaty went in to effect? Also, I am trying to find a picture of ALH76009 In Situ or in the lab prior to cutting/sampling. Can anyone point me in the right direction? Many thanks! Mike Bandli __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Antarctic Meteorites: Chip Off the Red Planet (MIL 03346)
Antarctic meteorites: Chip off the red planet By Emily Stone The Antarctic Sun October 24, 2004 The Antarctic meteorite hunters knew they'd found something good when they spotted the crusty black rock on a Miller Range ice field last year. The field notes said, 'this is very, very, very sexy.' Three verys, said Ralph Harvey, head of the U.S. Antarctic Search for Meteorites program (ANSMET). The hunters had to wait months before learning what they had discovered. The fist-sized rock first had to be carefully collected by the 4-person team, shipped frozen to NASA's Johnson Space Center in Houston, and then split so that a small chunk could be sent to the Smithsonian Institution for analysis. In July, the team learned they'd found a piece of Mars. The piece is a 1.3 billion year- old volcanic meteorite, weighing 715 grams. Martian meteorites are rare finds. Eleven of the 31 known Mars meteorites were found here. This meteorite is particularly valuable because it belongs to a group of Mars meteorites known as nakhlites. This is the seventh nakhlite on record. All the nakhlites are believed to have come from the same volcanic event and are among the oldest known rocks from Mars. They are named after the Egyptian city of Nakhla, where the first meteorite of that type was retrieved in 1911 after, as legend goes, fragments struck and killed a dog there. The older the rock, the more it can tell scientists about Mars' past, explained Harvey, a geology professor at Case Western Reserve University in Cleveland. The rock has potentially recorded not only a volcanic event 1.3 billion years ago, but all of the ensuing activity on Mars, he said, like the rock's interactions with the planet's fluids and atmosphere. What you've got is a little recorder, if you will. That's what us geologists do ? we play that back. Eighty-five scientists have requested a small piece of the rock to use in their own experiments, according to Timothy McCoy, the curator in charge of the national meteorite collection at the Smithsonian. The scientists will analyze the samples with different goals, such as searching for evidence of life, or learning more about Martian volcanoes. Others might dissolve a piece and measure the different isotope levels inside. There are a lot of little signs there that lead us toward a picture of the environment of Mars over the last billion years, and that's pretty cool, Harvey said. Thirty chunks of rock from 90 billion miles away is really more than we could ask for. It's a dream. McCoy, who was in charge of classifying the meteorite, said he could tell it was a nakhlite as soon as he looked through a microscope at a one-inch long, hair's width thick piece known as a thin section. Nakhlites are full of minerals that crystallized in the rocks as they hardened. Under the microscope, they look like bits of bright stained glass against a dark background, or like the view through a colorful kaleidoscope. The texture of this type of rock is so distinct that you can't possibly mistake it for something else, McCoy said. They're really pretty. McCoy said this meteorite has clearly interacted with liquid in its lifetime, but it's not yet clear what kind of liquid. He is one of the people who requested a sample to analyze more fully. McCoy plans to compare the new nakhlite to volcanic rock from a lava flow in Ontario, Canada. That flow is one of the few places on Earth that may be similar to the flow on Mars where the nakhlite originated. McCoy hopes the comparison will help determine at what depth in the flow the meteorite originated. ANSMET teams have been searching for meteorites in Antarctica since 1976. Meteorites fall evenly all over Earth, but Antarctica is a particularly good place to look for them. Antarctica's advantage is two-fold, Harvey explained. If you want to find things that fall from the sky, lay out a big white sheet, he said. And Antarctica is a big white sheet 3,000-miles across. The second reason has to do with the way ice flows across the continent. The meteorites get sprinkled across the ice, and many end up getting buried over time. The ice is slowly moving toward the sea, but it gets blocked in places by mountains and forms ice cul-de-sacs. Over millions of years, the ice surface at those bends evaporates, exposing more and more meteorites, Harvey said. ANSMET targets these areas for their hunts. ANSMET sends out two teams a year, a 4-person reconnais - sance team and an 8-person systematic search team. The reconnaissance team usually spends a couple days to a week at each site, checking to see if it's worth returning there. If it's deemed a good spot, a systematic search team will go there another year and spend the whole season collecting meteorites. This year the reconnaissance team will work at a number of ice fields throughout the mid-range of the Transantarctic Mountains, from the Zanefeldt Glacier in the south to Buckley Island in the north. The systematic search team
[meteorite-list] Antarctic meteorites on the move...
Hi All, Has anyone checked out the latest images of Iceberg B-22? This sucker is over 2100 square miles! Think how many meteorites are on it, rafting away from the South Pole. http://uwamrc.ssec.wisc.edu/amrc/iceberg.html Since it is no longer technically part of Antarctica, why don't we all pitch in and mount an expedition down there, set up camp on the iceberg, and mine its meteorites on snowmobile before it melts and dumps its cargo into the ocean? ;-) I'm only half-kidding... --Rob __ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
