Thaum xub thawj, cov cores tau siv los kawm hauv dej hiav txwv. Txawm li cas los xij, lawv cov nqi tsis yog rau dej hiav txwv xwb, tab sis kuj rau lwm yam keeb kwm geological sai sai tau pom meej. Txog niaj hnub no, ntau pua txhiab tus qauv tau raug sau los ntawm hauv qab ntawm tag nrho cov dej hiav txwv ntawm lub ntiaj teb thiab hla thaj tsam loj ntawm thaj av. Dab tsi yog qhov tseem ceeb thiab nws siv dab tsi?
xov xwm tus nqi
Tus nqi ntawm qhov tseem ceeb rau kev tshawb fawb yog qhov nyuaj rau kev xav. Cov qauv no yog qhov zoo tshaj plaws ncaj qha qhov chaw ntawm cov ntaub ntawv ntawm underground geology. Txij li thaum lawv sawv cev rau cov qauv hauv av loj tshaj plaws (feem ntau yog 10 cm hauv txoj kab uas hla thiab feem ntau ntau pua meters sib sib zog nqus), lawv qhia cov qauv pob zeb thiab hom. Thaum noj, cores muab cov ntaub ntawv ntawm pob zeb muaj pes tsawg leeg, porosity, permeability thiab cov peev txheej zoo. Tsis muaj lwm hom geological specimen muab ntau cov ntaub ntawv, npog ntau yam kev xav tau ntawm kev sib raug zoo thiab teeb meem kev tshawb fawb.
Txoj kev tshuaj ntsuam tshiab tau tsim kho, lub peev xwm ua qauv hauv computer tau txhim kho, tso cai rau geologists kom zoo duasawv cev subsurface dynamics thiab tsim cov tswv yim scientific. Txawm hais tias peb tsis tuaj yeem paub yuav ua li cas thiab thaum twg cov ntaub ntawv tseem ceeb raug siv, nws yuav tsum tau khaws cia. Lawv yog qhov tseem ceeb rau kev txhim kho kev lag luam, kev tiv thaiv ib puag ncig, kev npaj siv av thiab kev ua neej zoo ntawm peb cov pej xeem niaj hnub no thiab tag kis.
Ib tus qauv qauv yog ib feem cylindrical ntawm cov khoom tshwm sim. Feem ntau yog tau los ntawm kev drilling nrog kev xyaum tshwj xeeb rau hauv ib yam khoom, xws li sediment los yog pob zeb, siv lub hollow steel raj hu ua lub core laum. Lub qhov ua rau cov qauv tub ntxhais yog hu ua core receiver. Muaj ntau tus qauv rau qhov chaw sib txawv hauv cov xwm txheej sib txawv. Thaum lub sij hawm drilling, cov qauv yog ntau dua los yog tsawg nias rau hauv cov yeeb nkab. Muab rho tawm hauv chav kuaj, nws raug sim thiab tshuaj xyuas los ntawm ntau txoj hauv kev thiab cov cuab yeej nyob ntawm seb hom ntaub ntawv xav tau.
Sampling yuav raug coj mus kuaj cov khoom siv dag zog xws li pob zeb, ceramics, qee cov hlau thiab alloys, tshwj xeeb tshaj yog cov softer. Kuj tseem muaj cov tseem ceeb ntawm cov tsiaj nyob, suav nrog tib neeg. Hauv cov tshuaj, piv txwv li, cov qauv ntawm tib neeg cov pob txha raug coj mus rau kev tshuaj xyuas microscopic. Nws muaj feem ntau tias cov tub ntxhais no muaj qee yam uas yuav pab kuaj tus kab mob.
Geological collections
Muaj ntau cov qauv tseem ceeb. Qee qhov tau nthuav tawm rau pej xeem, lwm tus yog pw hauv cov tub ntxhais tshwj xeeb khaws cia. Ib qho loj tshaj plaws yog cov geological sau nyob rau hauvLub koom haum ntawm Oceanography. Scripps. Nws yog lub tsev qiv ntawv lub cev ntawm cov qauv uas tsis muaj nqi tau los ntawm hiav txwv thiab dej hiav txwv. Nws nyob ze li ntawm 7,500 qhov tob dej hiav txwv cores, tshaj 3,500 marine thiab kwv yees li 40,000 marine microfossil slides, nrog rau kwv yees li 10,000 pob zeb thiab pob txha pob txha hauv kev tshawb fawb sau.
Geological collections ntawm lub koom haum yog cov qub thiab loj tshaj plaws nyob rau hauv Teb Chaws Asmeskas, thiab niaj hnub tau ntxiv. Cov qauv no muaj rau cov kws tshawb fawb txog dej hiav txwv thoob ntiaj teb uas kawm ntau yam xws li geology, geochemistry, geobiology, paleooceanography, geophysics thiab ntau dua, ua cov khoom sau ua ib feem tseem ceeb ntawm ntau txoj haujlwm sib koom tes.
