Magnetite-nplua nuj banded hlau-formations (BIFs) nthuav tawm tus yam ntxwv sib nqus cov khoom, suav nrog muaj zog anisotropy.
Yuav ua li cas cov txheej txheem tsim cov hlau banded?
Banded hlau formations yog xav tias tau tsim nyob rau hauv dej hiav txwv raws li qhov tshwm sim ntawm oxygen ntau lawm los ntawm photosynthetic cyanobacteriaCov pa ua ke nrog yaj hlau hauv ntiaj teb dej hiav txwv los tsim cov hlau tsis huv, uas nag xob nag cua tawm, ua ib txheej nyias nyob rau hauv dej hiav txwv pem teb.
Dab tsi yog banded hlau formations pov thawj ntawm?
Nyob rau xyoo 1960, Preston Cloud, tus kws tshaj lij geology ntawm University of California, Santa Barbara, tau nyiam ib hom pob zeb hu ua Banded Iron Formation (lossis BIF). Lawv muab ib qho tseem ceeb ntawm cov hlau rau kev tsim tsheb, thiab muab pov thawj rau qhov tsis muaj pa oxygen nyob rau lub ntiaj teb thaum ntxov
Puas yog banded hlau formations stromatolites?
Txawm tias tsis yog ib txwm lees paub li ntawd, Banded Iron Formations (BIFs) yog lwm daim ntawv ntawm stromatolite. … Yog li, cov khaubncaws sab nraud povtseg yog qhov tshwm sim ntawm cov pa oxygen tso tawm los ntawm cov kab mob photosynthetic sib txuas nrog cov hlau yaj hauv ntiaj teb dej hiav txwv los tsim cov hlau oxides insoluble.
Vim li cas cov hlau thaiv hlau nres nres?
3. Kev tsim ntawm ntau BIFs tau nres ib zaug feem ntau ntawm cov hlau los ntawm dej hiav txwv tau siv uas ua rau tsim cov pa hauv huab cua raws li tau hais los ntawm thawj qhov tshwm sim ntawm cov txaj liab sab av loj tom qab- BIF Earth.
