Kev Kawm Ntawv:, Kev kawm theem nrab thiab cov tsev kawm ntawv
Cov zaub mov ntawm Leningrad Cheeb Tsam: khov kho siv thiab cia siab
Lub cheeb tsam, nyob rau hauv St. Petersburg, yog tus nplua nuj nyob hauv cov zaub mov. Cov khoom tseem ceeb hauv qhov chaw no tsis tau raug txheeb xyuas, cov khoom tsis tsim thiab cov khoom lag luam raug tshem tawm ntawm theem ua ntej, tab sis cov neeg cog lus yuav tsum tau siv.
Txheej yam ntawm thaj av ntawd
Qhov chaw ntawm thaj av hauv tas nrho yog nyob rau sab hnub tuaj European (Lavxias) dawb. Lub siab tshaj plaws tsis ncav cuag txawm peb puas metres saum toj no. Nws yog qhov xwm txheej ntawm lub pob zeb uas piav qhia tias vim li cas cov minerals ntawm lub nroog Leningrad yuav tsis tuaj. Tab sis muaj cov uas tsis yog-nws yog xim hlau, feem ntau ntawm cov uas tau siv rau hauv kev tsim kho. Nyob rau ntawm thaj chaw ntawm thaj av ntawd muaj ramified thiab tsim dej network, muaj ob txhiab pas dej, nrog rau cov coob nyob hauv Tebchaws Europe - Ladoga.
Lub cheeb tsam no nyob rau hauv cheeb tsam taiga, yog li ntawd nws yog nplua nuj nyob rau hauv hav zoov (coniferous nyob rau hauv sab qaum teb thiab tov nyob rau hauv sab qab teb), uas nyob ntau tshaj ib nrab ntawm cov ib ncig ntawm lub cheeb tsam. Ntau ntawm qhov chaw yog swamped. Tab sis qhov no tsis tiv thaiv qhov yuav luag tag nrho cov cheeb tsam tshawb fawb nyob rau hauv cov nyob rau ntawm stocks ntawm mineral kev pab. Daim duab qhia ntawm cov zaub mov hauv cheeb tsam nroog Leningrad yog hauv qab.
Muaj cov khoom muaj nqis
Ntawm nees nkaum-6 lub npe ntawm cov zaub mov uas nrhiav tau nyob rau ntawm thaj chaw ntawm thaj av, tsuas yog rau 6 yog cais raws li cov ntxhuav ntawm cov ntxhuav. Tib lub sij hawm, ntau tshaj li tsib puas nyiaj tau tshawb, tab sis tsawg dua li ntawm nees nkaum feem pua siv. Minerals Leningrad cheeb tsam yog txuam nrog tectonics - lub teb chaws yog nyob rau ntawm lub hlws ris ntawm tectonic lug. Yog li ntawd, sab qaum teb yog nplua nuj nyob hauv cov khoom tsim cov khoom siv - granite, pob zeb, gravel, xuab zeb. Haib khaubncaws sab nraud povtseg ntawm cov txo yav qab teb muaj phosphates thiab roj shale, bauxite, limestone thiab dolomite. Txuas xeeb muab faib thoob plaws hauv lub cheeb tsam yog deposits ntawm peat, xuab zeb, av nplaum. Cov dej thaj tsam ntawm lub Gulf ntawm Finland tuas ib tug me me tso ntawm hlau-manganese ore. Ntxiv mus, muaj ntau qhov chaw radon thiab cov thermal mineral nyob hauv cheeb tsam.
Ua tiav cov zaub mov tiav
Raws li cov degree ntawm kev loj hlob ntawm deposits, ntau pawg neeg yuav tsum tau txheeb xyuas, uas cov mineral cov chaw muab kev pab ntawm cheeb tsam Leningrad yog tsim. Daim ntawv teev npe no yuav tsum pib muaj cov zaub mov zoo, uas muaj cov schists, phosphates thiab bauxites.
Ib nrab ntawm txoj kev loj hlob
Tej cov zaub mov mas yog ntau hom khoom siv hauv tsev. Cov zaub mov ntawm thaj tsam Leningrad yog nplua nuj nyob rau hauv granite, limestone, kev tsim kho thiab shaping xuab zeb, brick thiab refractory av nplaum. Lub extraction ntawm granite yog nqa tawm nyob rau sab qaum teb ntawm Karelian Isthmus los ntawm txoj kev qhib.
Kub tsuas
Lub cheeb tsam tsis yog nplua nuj nyob hauv kub kub deposits, tab sis muaj cov chaw kub-bearing. Yeej, qhov hlau no muaj nyob rau hauv cov nyiaj ntawm lwm yam minerals, ob lub ore thiab non-ore. Tab sis nws muaj nyob rau hauv cov kev pab no yog qhov meager. Yog li ntawd, kub ntau lawm nyob rau hauv lub Leningrad cheeb tsam tshaj tawm hais tias unprofitable thiab muaj txoj kev yog tsis ua. Tab sis nws yog ntawm kev txaus siab rau amateur mining.
Pom zoo
Tseem muaj lwm yam minerals ntawm Leningrad Thaj Chaw, nws cov deposits tsis koom rau hauv tag nrho cov kev khiav hauj lwm. Qhov no muaj xws li cov khoom ntawm cov kab mob dolomite, ntxhia xim, quartzite thiab av nplaum. Tsis tas li ntawd, qee qhov hom minerals tawm hauv txoj kev loj hlob, cov khoom uas muaj nyob hauv cheeb tsam. Lub pob zeb magnetite, xim ntsuab thiab xim zoo nkauj, roj, roj thiab cov nroj tsuag.
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