Video: Yuav siv uranium li cas rau hnub tim pob zeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Xov tooj cua sib tham yog ib txoj kev siv rau hnub pob zeb thiab lwm yam khoom raws li qhov paub txog kev lwj ntawm cov isotopes radioactive. Ob tug uranium isotopes lwj ntawm tus nqi sib txawv, thiab qhov no yuav pab ua uranium - coj sib tham ib txoj kev txhim khu kev qha tshaj plaws vim nws muab cov kev kuaj xyuas ua ke.
Xav txog qhov no, dab tsi yog 3 txoj hauv kev ntawm kev sib tw pob zeb?
Ua ke nrog cov hauv paus ntsiab lus stratigraphic, radiometric sib tham Cov txheej txheem yog siv nyob rau hauv geochronology los tsim kom tau lub sij hawm geology. Ntawm cov txheej txheem paub zoo tshaj plaws yog radiocarbon dating, poov tshuaj - argon sib tam thiab uranium -kev sib tham.
Yuav ua li cas yog uranium sib tam? Teb 2: Yog, radiometric sib tham yog ib heev raug txoj kev hnub lub ntiaj teb. Peb paub nws yog raug vim radiometric sib tham yog raws li cov xov tooj cua tawg ntawm cov isotopes tsis ruaj khov. Piv txwv li, lub caij Uranium muaj nyob ua ib qho ntawm ob peb isotopes, qee qhov tsis ruaj khov.
Raws li, Geologists hnub pob zeb li cas?
Tsim kom muaj hnub nyoog ntawm ib pob zeb los yog pob txha pob txha, cov kws tshawb fawb siv qee hom moos los txiav txim qhov hnub nws tau tsim. Geologists feem ntau siv radiometric sib tham txoj kev, raws li lub ntuj radioactive decay ntawm tej yam xws li poov tshuaj thiab carbon, raws li txhim khu kev qha moos rau hnub cov xwm txheej thaum ub.
Hom pob zeb twg tuaj yeem sau hnub tim siv xov tooj cua sib tham?
Radioactive dating yog ib txoj kev sib tham ntawm pob zeb thiab cov pob zeb hauv av uas siv cov xov tooj cua isotopes. Txoj kev no yog pab tau rau igneous thiab metamorphic pob zeb , uas tsis tuaj yeem sau hnub tim los ntawm stratigraphic correlation method siv rau sedimentary pob zeb . Ntau tshaj 300 qhov tshwm sim tshwm sim isotopes paub.
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Extrusive igneous pob zeb
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Sedimentary pob zeb