Mu bihe byashize, amadirishya yimpapuro yakoreshwaga mu Bushinwa bwa kera, kandi amadirishya y’ibirahure aboneka gusa muri iki gihe, bigatuma inkuta z’umwenda w’ibirahure mu mijyi ziba nziza cyane, ariko ikirahure kimaze imyaka ibihumbi icumi nacyo cyabonetse ku isi, muri umuhanda wa kilometero 75 z'ubutayu bwa Atacama mu majyaruguru y'igihugu cya Amerika y'Epfo cya Chili.Kubitsa ibirahuri bya silikatike yijimye bikwirakwijwe mu karere, kandi byageragejwe kuba hano imyaka 12.000, mbere yuko abantu bavumbura ikoranabuhanga ryo gukora ibirahure.Habayeho kwibaza aho ibyo bintu by'ibirahure byaturutse, kubera ko umuriro mwinshi cyane watwika ubutaka bwumucanga kugeza kristu ya silikatike, bityo bamwe bakavuga ngo "umuriro wumuriro" wigeze kuba hano.Raporo ya Yahoo News yo ku ya 5 Ugushyingo ivuga ko ubushakashatsi buherutse gukorwa buyobowe n’ishami rya kaminuza ya Brown ishami ry’isi, ibidukikije n’ibinyabuzima byerekana ko ikirahure gishobora kuba cyarakozwe n’ubushyuhe ako kanya bwa comet ya kera yaturikiye hejuru y’isi.Muyandi magambo, ibanga ryinkomoko yibi birahure bya kera byakemuwe.
Mu bushakashatsi bwakozwe na kaminuza ya Brown, iherutse gusohoka mu kinyamakuru Geology, abashakashatsi bavuga ko ingero z'ikirahuri cyo mu butayu zirimo uduce duto tutaboneka ku isi.Amabuye y'agaciro ahuza cyane n'ibigize ibikoresho byagaruwe ku isi n’ubutumwa bwa NASA bwa Stardust, bwakusanyije uduce duto twa comet yitwa Wild 2. Itsinda ryifatanije n’ubundi bushakashatsi kugira ngo bemeze ko ayo mabuye y'agaciro ashobora kuba ari ibisubizo by’inyenyeri hamwe n’ibigize bisa na Wild 2 yaturikiye ahantu hegereye Isi kandi igice kandi byihuse kigwa mubutayu bwa Atacama, gihita kibyara ubushyuhe bwinshi cyane no gushonga hejuru yumucanga, mugihe hasize bimwe mubikoresho byacyo.
Iyi mibiri y'ibirahure yibanze ku butayu bwa Atacama mu burasirazuba bwa Chili, ikibaya kiri mu majyaruguru ya Chili gihana imbibi na Andes mu burasirazuba na Range Coastal Range mu burengerazuba.Kubera ko nta kimenyetso cyerekana ko ibirunga biturika bikabije, inkomoko yikirahure yamye ikurura umuryango wa geologiya na geofiziki kugirango ukore iperereza ryibanze.
Ibi birahuri birimo ibintu bya zircon, na byo bikangirika bikabora gukora baddeleyite, guhindura imyunyu ngugu bisaba kugera ku bushyuhe buri hejuru ya dogere 1600, mu byukuri ntabwo ari umuriro wisi.Kuri iyi nshuro kandi ubushakashatsi bwakozwe na kaminuza ya Brown bwerekanye ubundi buryo bwihariye bw’amabuye y'agaciro aboneka gusa muri meteorite no mu yandi mabuye yo ku isi, nka calcite, meteoric fer sulfide hamwe na calcium-aluminiyumu ikungahaye cyane, bihuye n'umukono wa minervalike w'ingero za comet zafashwe mu butumwa bwa NASA bwa Stardust .Ibi byatumye tugera kuri uyu mwanzuro.
Igihe cyo kohereza: Ugushyingo-16-2021