Lub ntiaj teb lub ntsiab yog ib qho tseem ceeb ntawm cov hlau tseem ceeb.Tuam Tshoj lub ntiaj teb tsis tshua muaj peev txheej muaj txiaj ntsig zoo tshaj plaws thiab feem ntau yog los ntawm Baiyun Obo, qhov tsis tshua muaj super-loj tsawg lub ntiaj teb tso nyiaj hauv ntiaj teb.Txawm li cas los xij, vim muaj kev txwv ntawm kuv lub hom phiaj kev tshawb nrhiav, tsis tshua muaj lub ntiaj teb mineralization txoj kev xav thiab kev tshawb fawb thev naus laus zis, tau muaj kev nkag siab sib txawv ntawm nws cov txheej txheem hlau loj loj, ore lub cev spatial morphology thiab cov peev txheej muaj peev xwm, uas txwv kev soj ntsuam thiab kev siv cov peev txheej tsawg hauv ntiaj teb. .Txhawm rau kom paub meej txog kev tsim cov txheej txheem ntawm Bayan Obo tso nyiaj thiab ntsuas cov peev txheej muaj peev xwm ntawm lub ntiaj teb tsis tshua muaj, lub koom haum ntawm Geology thiab Geophysics ntawm Suav Academy ntawm Kev Tshawb Fawb tau siv cov haujlwm tseem ceeb thiab koom tes nrog Baotou Iron thiab Steel (Group) Co., Ltd. . thiab nws cov koom haum koom ua ke los ua cov ncauj lus kom ntxaws hauv cheeb tsam geological kev tshawb fawb, kho dua ntawm 1: 5000 daim duab qhia chaw geological, ntau txoj hauv kev thiab ntau qhov kev tshawb fawb geophysical thiab kev tshawb fawb metallogenic hauv Bayan Obo.Los ntawm kev tshawb fawb sib koom ua ke ntawm geology, geochemistry, geophysics thiab lwm yam kev qhuab qhia, cov txheej txheem evolution ntawm Bayan Obo carbonatite magma thiab cov txheej txheem ntxiv ntawm lub ntiaj teb tsis tshua muaj tshwm sim, cov txheej txheem carbonatite emplacement thiab cov txheej txheem ore-tswj yam tau qhia meej, peb- qhov loj me ntawm cov ore-cov kabmob geological lub cev tau tsim, thiab cov peev txheej hauv ntiaj teb uas tsis tshua muaj peev xwm tau raug tshuaj xyuas.(1) Baiyunebo cheeb tsam tau ntsib ntau yam tectonic txav.Ua ntej hloov cov pob zeb carbonate, cov pob zeb Proterozoic sedimentary thaum ntxov (Baiyunebo pab pawg quartz sandstone, conglomerate, slate, thiab lwm yam) nyob rau hauv lub mining cheeb tsam tau undergone lub regional compressional tectonic kev txiav txim, thiab kab rov tav strata tau hloov los ntawm cov qauv tsim gravel. ncuav mog qab zib qauv, mylonite, quav, thiab lwm yam. Cov tshiab tsim ze li ntawm EW trending thiab steep tectonic schistosity muab ib tug haum channel rau upwelling ntawm carbonated magma ntawm ~ 1.3 billion xyoo (Fig. 1).Kev faib tawm, kev txheeb xyuas thiab kev sib raug zoo ntawm lub sijhawm ntxov thiab lig ntawm cov pob zeb sedimentary ntawm Middle Proterozoic Baiyunebo Group hauv cheeb tsam mining yuav tsum tau rov kuaj dua.
Daim duab 1 Kev loj hlob keeb kwm thiab carbonatite emplacement ntawm Mesoproterozoic Bayan Obo phiab
(2) Baiyunebo H8 dolomite yog igneous carbonate pob zeb, uas muaj pom tseeb intrusive kev sib raug zoo nrog ib puag ncig pob zeb.Carbonate pob zeb yog niam txiv pob zeb ntawm lub ntiaj teb tsawg mineralization thiab kuj lub ntiaj teb tsawg ore lub cev.Kev sib sau ntawm cov hlau loj hauv Bayan Obo tshwm sim hauv ~ 1.3 billion xyoo.Carbonic magma muaj ib tug qauv ntawm evolution ntawm hlau-magnesium-calcareous, thiab lub ntiaj teb tsis tshua muaj cov ntsiab lus nyob rau hauv carbonate pob zeb nyob rau hauv ntau theem, tshwj xeeb tshaj yog lub teeb tsis tshua muaj lub ntiaj teb ntsiab, qhia ib tug qauv ntawm gradual enrichment.Tom qab tsim cov deposit, nws underwed ob transformation nyob rau hauv lub Early Paleozoic (450 ~ 400 lab xyoo) thiab lub lig Paleozoic (280 ~ 260 lab xyoo) feem.Txoj kev hloov pauv tau coj mus rau kev ua kom lub ntiaj teb tsis tshua muaj thiab tsim cov zaub mov tshiab, tab sis tsis muaj qhov pom tseeb ntxiv ntawm txawv teb chaws tsawg ntiaj teb.
(3) Kev faib tawm ntawm cov pob zeb carbonate qhia tawm los ntawm cov txiaj ntsig ntawm kev sib nqus sib nqus muaj cov yam ntxwv ntawm sab hnub tuaj-sab hnub poob.Lub ntsiab ore thiab sab hnub tuaj ore yog qhov chaw tseem ceeb ntawm lub cev sib nqus.Lub ntsiab ore thiab sab hnub tuaj ore yog txuas nrog carbonate pob zeb faib chaw, thiab kev loj hlob ntawm cov pob zeb carbonate yog qhov loj.Lub siab magnetic anomaly lub cev thiab tsis tshua muaj resistivity anomaly lub cev qhia peb-dimensional faib ntawm carbonate pob zeb (ore lub cev) (Daim duab 2).Cov carbonatite hauv Bayan Obo muaj qhov chaw hloov chaw thiab nyiam tib lub magma channel hauv qhov tob.Lub chaw yog nyob nruab nrab ntawm lub ntsiab ore thiab sab hnub tuaj ore.Tom qab qhov kev hloov ntawm carbonated magma, qhov ntxhab foliation tsim los ntawm kev hloov ntawm cov qauv thaum ntxov yog thawb mus rau sab hnub poob (sab hnub poob mine) thiab mus rau sab hnub tuaj (Huahua) raws li, thiab bifurcation thiab merging tuaj yeem tshwm sim (Fig. 3).
Daim duab 3 Spatial faib qauv ntawm carbonatite nyob rau hauv Baiyunebo deposit
(4) Baiyunebo carbonatite muaj qhov ntim loj thiab qib siab ntawm evolution, uas yog qhov tseem ceeb rau nws qhov loj me me hauv ntiaj teb tsub zuj zuj.Raws li qhov tau txais kev faib tawm ntau, ntim thiab (tsawg kawg) qhov ntom ntom ntawm carbonate pob zeb loj (tsis tshua muaj lub ntiaj teb ore lub cev), thiab siv 2% tsawg lub ntiaj teb cov ntsiab lus ntawm tag nrho cov pob zeb ntawm cov pob zeb carbonate (raws li kev saib xyuas qhov nruab nrab tus nqi tau los ntawm cov ntaub ntawv. xyoo dhau los), nws tau kwv yees tias cov peev txheej muaj peev xwm ntawm qhov tsis tshua muaj ntiaj teb oxide hauv Baiyunebo tsuas yog 333 lab tons, uas yog ze li 10 npaug ntawm qhov tam sim no lees paub tus nqi ntawm 36 lab tons hauv Baiyunebo, qhov tshiab tso tawm thoob ntiaj teb tag nrho ua pov thawj tsis tshua muaj ntiaj teb. cov peev txheej (xws li Bayan Obo) los ntawm Tebchaws Meskas Geological Survey yog 2.78 npaug ntawm 120 lab tons.
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Post lub sij hawm: Mar-02-2023