100cm Ibinini binini Amabere Mini Urukundo

Zircons ni minerval ikunzwe mubahanga kuko irakomeye. Ubunini bwa micrometero kristu irashobora kwihanganira ikirere mumyaka miriyari kugirango ibungabunge amabanga ya geochemiki yavutse. Bafata kandi isotopi ya uraniyumu mubidukikije uko ikora, ikora nkigihe gitangira uhereye igihe zircons zitobora. Igipupe cyibitsina

Uranium isotopes yangirika mukuyobora ku gipimo cyateganijwe. Mu kubara umubare wa atome ya sisitemu ikora na atome ya uranium isigaye, abashakashatsi barashobora kumenya igihe cyashize kuva zircons zinangira ibintu byashongeshejwe.

Abanditsi b'ubushakashatsi bakoze ubushakashatsi kuri zircons zashyizwe mu cyitegererezo cy'ukwezi cyakusanyirijwe muri Apollo 17 mu 1972, maze bakora ikarita ya 3D ya atome. Kugereranya isotopi ya sisitemu byatumye imyaka ingana na miliyari 4.46, imyaka ishaje cyane kugirango ukwezi gutangire.

Iyi myaka yabanje kugenwa nabafatanyabikorwa ba Greer iyobowe na Bidong Zhang na Audrey Bouvier mu 2021, ariko raporo yashidikanyaga. Abakenguzamateka berekanye ko atome ziyobora zikunda kwimuka kugira ngo zikore imifuka yubushyuhe buke cyangwa buke mu rutare. Ukurikije aho umuntu yarebye, hari amahirwe yuko bashobora guhura nizi mbuga ziyobowe zitagabanijwe kandi bakabara imyaka ya zircon.

Kugira ngo ibyo bibazo bikemuke, Bouvier yegereye itsinda rya Greer kugira ngo yongere kubara atome, kuri iyi nshuro hamwe na ion probe ishobora gutondekanya urutare ahantu harehare cyane hakoreshwa ubushakashatsi bwabanje. Iperereza ryiza ryemerera itsinda kumenya uturere twa nanosize ya atome ikungahaye cyangwa yatakaye, niba ihari. Ariko basanze ntayo.Melina Elden Impeta Igitsina

Umwanditsi w’ubushakashatsi witwa Philipp Heck, umuhanga mu by'ikirere mu nzu ndangamurage ya Field na kaminuza ya Chicago agira ati: “Muri iyi zircon, ibintu byose byari bimwe, ku buryo tutagomba no guhangayikishwa na byo.” Ibisubizo byemeje ko imyaka yapimwe mbere yimyaka 4.46.

Melanie Barboni, umuhanga mu bumenyi bwa geochemiste muri kaminuza ya Leta ya Arizona utagize uruhare muri ubwo bushakashatsi agira ati: "Ni ubushakashatsi bwiza cyane." Barboni yakoze ubushakashatsi ku zindi isotopi muri zircons z'ukwezi kugira ngo amenye ko imbere y'ukwezi kwatuye mu bice bitandukanye mu myaka miriyari 4.51 ishize, igice cyabanjirije icyiciro cya nyuma cyo gushingwa cyafashwe mu bushakashatsi bushya.

Barboni avuga ko ubushakashatsi bushya bujyanye nibyo yabonye. Yongeyeho ati: “Impapuro nyinshi zerekana ko ukwezi kwabayeho nyuma y'ibyo, imyaka miriyari 4.3.” Ati: "Biragaragara ko ibyo bidashoboka ukoresheje ayo makuru."