Kawm txog Central Siberian Plateau, geologists tau txaus siab rau hauv av siab nyob rau sab qab teb sab hnub poob. Dab tsi yog qhov txawv txav hauv cheeb tsam hu ua Yenisei Ridge? Vim li cas qhov chaw no thiaj li tau txais kev pom zoo?
Short description
Lub roob nyob sab xis ntawm Yenisei, nyob nruab nrab ntawm tus dej Podkamennaya Tunguska thiab Kan. Qhov ntev ntawm Yenisei Ridge tsis tshaj 750 km. Qhov dav ntawm lub roob siab yog 200 km. Qhov siab tshaj plaws ntawm lub roob yog lub roob Enashimsky Polkan, nws qhov siab yog 1104 m.
Thaj chaw uas Yenisei Ridge nyob yog muaj cai muab faib ua ob lub roob:
- South Yenisei low-roob roob.
- Zangarie.
Kev faib ntawm roob kab khiav raws tus dej Angara.
Geological reference
Lub geology ntawm lub ridge yog tsis to taub tag nrho. Cov kws tshawb fawb tseem tsis tau txiav txim siab lub hnub nyoog ntawm Precambrian deposits uas ua rau lub roob hauv paus. Lub tiaj no yog ib qho ntawm thaj tsam ntawm Yenisei-Sayan fold-cover cheeb tsam, uas tsim sab hnub poob ntug ntawm Siberian platform.
Yenisei Ridge muaj cov pob zeb qub qub. Limestones, sandstones, conglomerates, shales, ntxiab yog txawv ntawm no. Lub roob system muaj qhov ruaj khov tshiab Quaternary uplifts ntawm cov laus Proterozoic crystalline hauv paus. Lub sijhawm geodynamic ntawm kev tsim ntawm Yenisei Ridge yog suav tias yog Proterozoic. Qhov no yog hu ua Baikal folding. Tsawg kawg yog rau pua lab xyoo dhau los, cov qauv tectonic ntawm sab qab teb Siberia tau hloov pauv ntau heev. Nws nce thiab nqis. Roob tawg, ces rov ua dua thiab sawv dua. Sedimentary strata tau sau thaum lub sijhawm thaum muaj dej hiav txwv sov nyob rau sab qab teb ntawm Siberia. Yog li ntawd, lawv muaj cov xuab zeb, av nplaum thiab limestone deposits (cov khoom pov tseg ntawm cov neeg nyob hauv hiav txwv).
Granitoids ntawm Yenisei Ridge yog suav tias yog cov cim tseem ceeb ntawm qhov chaw geodynamic ntawm kev tsim ntawm lub teb chaws crust. Qhov no yog lub npe generic rau pob zeb ntawm igneous keeb kwm, uas muaj oxides ntawm silicon thiab quartz. Thaum lub sij hawm txoj kev kawm thiab kev tshawb fawb ntawm lub ridge, ntau cov ntaub ntawv scientific tau sau nyob rau hauv muaj pes tsawg leeg ntawm granitoids thiab ob peb cov kws kho mob dissertations raug tiv thaiv.
Cov qauv txheej txheem ntawm geological txheej thiab metamorphosis ntawm pob zeb deposits nyob rau hauv lub sij hawm coj mus rau tsim ntawm tsawg minerals, marbles, dolomites thiab lwm yam fossils. Qhov no ua rau Yenisei Ridge thaj tsam ntawm tib neeg kev mloog zoo.
Txhob Cia Siab
Yenisei Ridge muaj ntau hom kev nyem. Interfluves yog flattened los yog dome-puab, cov hav dej yog steeply sloping, nrog rau qhov tob tob. Lub ntsiab lus siab tshaj yog nyob rauqhov awn ib feem ntawm lub ridge. Qhov qis tshaj yog nyob rau sab qaum teb, nyob rau hauv cheeb tsam ntawm Yenisei River, nws qhov siab yog 30 m. Ntawm qhov kev sib tshuam ntawm lub Ridge los ntawm Yenisei (hauv qab lub qhov ncauj ntawm Pob Zeb Tunguska), cov dej ntws ua rau Osinovsky pib. Lwm qhov nrawm hu ua Kazachinsky nyob hauv thaj chaw Kamenny Cape, me ntsis tshaj 220 km ntawm Krasnoyarsk.
Mineral resources
Lub ntsiab lus tseem ceeb rau thaj chaw no yog nyiam los ntawm cov pob zeb loj loj. Nws yog nrog lawv tias tib neeg kev lag luam hauv Yenisei Ridge feem ntau txuas nrog. Cov khoom pov tseg ntawm hlau ore, bauxites (aluminium ore), magnesites, talc, titanite tau pom ntawm no. Kev nplua nuj ntawm cov nyiaj kub tau pom nyob rau hauv qhov tob ntawm lub xyoo pua 19th.
Nws ntseeg tau tias muaj kub hauv lub plab zom mov tau tshawb pom los ntawm Yegor Ivanovich Zhmaev. Nws yog ib tug neeg ua haujlwm ntawm cov tub lag luam Zotov. Zhmaev tau sau cov ntaub ntawv los ntawm Evenks (cov neeg hauv zos) thiab xyoo 1839 thov rau 5 lub pob zeb kub sawv cev ntawm nws tus tswv ntiav haujlwm. Thiab txij li xyoo 1840, qhov "kub maj" tiag tiag tau pib ntawm Yenisei Ridge. Nyob rau hauv lub xyoo pua 19th, kwv yees li 69% ntawm kev rho tawm ntawm cov hlau tseem ceeb hauv Russia los ntawm cov kub ntawm Yenisei Ridge.
Tam sim no, kev txhim kho cov nyiaj tso nyiaj kub tau ua tiav los ntawm lub xeev. Qhov loj tshaj deposit rau hnub no yog Olimpiada (Severo-Yenisei cheeb tsam). Raws li kev tshawb fawb geological, tag nrho cov kub cia ntawm lub ridge yog kwv yees li 1,570 tons.
me ntsis txog xwm. Zaub
Yenisei Ridge nyob hauv thaj tsam Siberian taiga. Ob hom tau pom ntawm no: sab qab teb larchtaiga thiab Siberian ntoo thuv nrog ntom undergrowth. Pine tsaus coniferous taiga yog thaj chaw sab hnub poob ntawm toj. Qhov siab tshaj plaws yog treeless thiab them nrog shrubs. Raws li kev cog qoob loo ntawm larch taiga, alder, qus sawv, qus raspberry, currant, rhododendron feem ntau pom. Pine taiga muaj reed thiab hellebore undergrowth.
Nyiaj
Nyob hauv roob Yenisei Ridge muaj ib tug dais xim av, hma, ib tug elk, ib tug lynx, ib tug wolverine. Muaj ntau hom hma, badger, polecat, ermine, weasel, sable, mos lwj, ram thiab lwm yam tsiaj ntawm no. Cov tsiaj muaj plaub tau sau nyob rau hauv cov chaw no ntev heev.
Txiv noog nyob hauv cov ntoo ntoo. Lawv daim ntawv teev npe yog loj heev: muaj ib tug ntoo khaub lig, thiab ib tug nutcracker, thiab ib tug thrush, thiab ib tug woodpecker. Kev nplua nuj ntawm cov noog ntawm cov tsiaj nyeg yog txuam nrog ntau tus noog: owls, hawks thiab lwm hom. Kuj tseem muaj coob tus ntawm capercaillie thiab hazel grouse. Kev nplua nuj ntawm cov noog yog txuam nrog cov khoom noj muaj zog, vim muaj ntau cov kab hauv taiga.
