UM-Bot Posted August 7, 2018 #1 Share Posted August 7, 2018 Scientists have been studying a meteorite that dates back to a time before the birth of our solar system. https://www.unexplained-mysteries.com/news/320366/meteorite-found-in-africa-is-older-than-the-earth 3 1 Link to comment Share on other sites More sharing options...
Orphalesion Posted August 7, 2018 #2 Share Posted August 7, 2018 In danger of sounding ditzy... Neat! 3 2 Link to comment Share on other sites More sharing options...
+OverSword Posted August 7, 2018 #3 Share Posted August 7, 2018 Super Neat! 3 1 Link to comment Share on other sites More sharing options...
Merc14 Posted August 7, 2018 #4 Share Posted August 7, 2018 (edited) Incredibly neat!! A piece of our solar system before it really was one! Was the Sun still forming or already there and just gathering its disk? Edited August 7, 2018 by Merc14 4 Link to comment Share on other sites More sharing options...
MyOtherAccount Posted August 8, 2018 #5 Share Posted August 8, 2018 I wonder how they date such a thing. 3 Link to comment Share on other sites More sharing options...
Seti42 Posted August 8, 2018 #6 Share Posted August 8, 2018 https://geomaps.wr.usgs.gov/parks/gtime/ageofearth.html 1 Link to comment Share on other sites More sharing options...
NuclearImplosion Posted August 8, 2018 #7 Share Posted August 8, 2018 16 hours ago, MyOtherAccount said: I wonder how they date such a thing. Not doubting the authenticity ... but I did wonder the same thing. 1 Link to comment Share on other sites More sharing options...
RoofGardener Posted August 8, 2018 #8 Share Posted August 8, 2018 4 minutes ago, NuclearImplosion said: Not doubting the authenticity ... but I did wonder the same thing. Carbon dating, presumably ? 1 Link to comment Share on other sites More sharing options...
Harte Posted August 8, 2018 #9 Share Posted August 8, 2018 Only if you think the Earth is less than 60k years old. Harte Link to comment Share on other sites More sharing options...
Harte Posted August 8, 2018 #10 Share Posted August 8, 2018 Quote Aluminium-26 can be used to calculate the terrestrial age of meteorites. After the breakup of the meteorite parent body, it will be bombarded by cosmic rays, which will saturate it in aluminium-26. After falling to earth, 26Al production ceases, which means that the amount of 26Al in the sample can be used to calculate the date the meteorite fell to earth. wiki Quote The 26Al–26Mg isotope systematics were determined for whole rock (WR) and mineral separates of NWA 11119 (Supplementary Data 7). These define an isochron corresponding to a 26Al/27Al ratio at the time of crystallization of this sample of (1.69 ± 0.09) × 10−6 (Fig. 5). Previously, the highest value reported for an achondrite internal 26Al–26Mg isochron was (1.28 ± 0.07) × 10−6 (for the ancient cumulate eucrite Asuka 88139427). Relative to the D’Orbigny angrite age anchor28,29, the 26Al–26Mg age of NWA 11119 is 4564.8 ± 0.3 Ma (Fig. 5). It is also possible to calculate a 26Al–26Mg age relative to the first-formed refractory solids in the solar protoplanetary disk that are characterized by a canonical 26Al/27Al ratio of 5.2 × 10−5 30. However, the reported Pb–Pb ages for these refractory solids span ~0.6 Ma30,31,32, leading to a range of 26Al–26Mg ages of 4563.7 ± 0.2 –4564.4 ± 0.3 Ma for NWA 11119. Consideration of the full range of these 26Al–26Mg ages (obtained relative to the D’Orbigny angrite or the refractory inclusions) and the Pb–Pb ages of the refractory inclusions30,31,32 indicates that NWA 11119 was formed 2.5–3.5 Ma after the first-formed refractory solids in the solar protoplanetary disk. Source: Scientist mentioned in the story (et al.) Harte Link to comment Share on other sites More sharing options...
MyOtherAccount Posted August 8, 2018 #11 Share Posted August 8, 2018 (edited) Thanks Harte! Edited August 8, 2018 by MyOtherAccount 1 Link to comment Share on other sites More sharing options...
Amanda Evans Posted August 8, 2018 #12 Share Posted August 8, 2018 (edited) It’s all sparkly! Edited August 8, 2018 by Amanda Evans 1 Link to comment Share on other sites More sharing options...
TripGun Posted August 14, 2018 #13 Share Posted August 14, 2018 Geologists are always talking schist. 1 Link to comment Share on other sites More sharing options...
Norpheus Posted August 17, 2018 #14 Share Posted August 17, 2018 And if its older than earth.. Where did the Dating Data Coming from? Link to comment Share on other sites More sharing options...
taniwha Posted August 19, 2018 #15 Share Posted August 19, 2018 On 18/08/2018 at 8:00 AM, Norpheus said: And if its older than earth.. Where did the Dating Data Coming from? From the future? Link to comment Share on other sites More sharing options...
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