Earth element ndi membala wofunikira wazitsulo zazikulu. Mphamvu zaku China zapadziko lapansi ndizopambana ndipo makamaka zimachokera ku Baiyun Obo, malo osowa kwambiri padziko lonse lapansi. Komabe, chifukwa cha zovuta za zolinga zofufuzira migodi, chiphunzitso chosowa cha mineralization ndi ukadaulo wofufuza, pakhala pali kumvetsetsa kosiyanasiyana kwa njira yake yolemeretsa zitsulo, ore body spatial morphology ndi zinthu zomwe zingatheke, zomwe zimalepheretsa kuunika ndi kugwiritsa ntchito moyenera zinthu zapadziko lapansi. . Pofuna kumveketsa bwino njira yopangira gawo la Bayan Obo ndikuwunika momwe zinthu ziliri padziko lapansi losowa, Institute of Geology and Geophysics ya Chinese Academy of Sciences inatumiza mapulojekiti ofunika kwambiri ndikugwirizana ndi Baotou Iron and Steel (Group) Co., Ltd. . ndi magawo ake ogwirizana kuti achite kafukufuku watsatanetsatane wa madera, kukonzanso mapu a 1:5000 a geological, njira zambiri ndi njira zosiyanasiyana kafukufuku wamagulu osiyanasiyana a geophysical ndi kafukufuku wa metallogenic ku Bayan Obo. Kupyolera mu kafukufuku wophatikizana wa geology, geochemistry, geophysics ndi maphunziro ena, kusinthika kwa Bayan Obo carbonatite magma ndi njira yolemeretsa ya dziko losowa zawululidwa, makina oyika mpweya wa carbonatite ndi zinthu zowongolera ore zafotokozedwa, zitatu- mawonekedwe a dimensional a ore-bearing geological body amangidwa, ndipo zopezeka zapadziko lapansi zosowa zawunikidwanso. (1) Dera la Baiyunebo lakumana ndi mayendedwe angapo a tectonic. Asanakhazikitsidwe miyala ya carbonate, miyala yoyambirira yapakati ya Proterozoic sedimentary (Baiyunebo gulu la quartz sandstone, conglomerate, slate, ndi zina zotero) m'dera la migodi yakhala ikuchitapo kanthu mwachigawo cha compressional tectonic action, ndipo zopingasa zasinthidwa ndi zomanga kupanga miyala. keke kapangidwe, mylonite, pindani, etc. The kumene anapanga pafupifupi EW trending ndi phompho Tectonic schistosity imapereka njira yabwino yopititsira patsogolo mpweya wa carbonated wa zaka 1.3 biliyoni (mkuyu 1). Kugawa, kuperekedwa ndi ubale pakati pa miyala yoyambira ndi yochedwa ya Middle Proterozoic Baiyunebo Group m'dera la migodi iyenera kuwunikiridwanso.
Chithunzi 1 Mbiri yachitukuko ndi kuyika kwa carbonatite kwa beseni la Mesoproterozoic Bayan Obo
(2) Baiyunebo H8 dolomite ndi mwala woyaka moto wa carbonate, womwe umakhala ndi ubale wolumikizana kwambiri ndi thanthwe lozungulira. Mwala wa carbonate ndiye thanthwe la makolo a mineralization osowa padziko lapansi komanso thupi losowa kwambiri padziko lapansi. Kuwunjika kwazitsulo zazikulu ku Bayan Obo kunachitika mu ~ 1.3 biliyoni zaka. Carbonic magma ali ndi kachitidwe ka chisinthiko kuchokera ku iron-magnesium-calcareous, ndipo zinthu zapadziko lapansi zomwe sizipezeka m'miyala ya carbonate pamagawo osiyanasiyana, makamaka zopepuka zapadziko lapansi, zikuwonetsa chizolowezi cholemeretsa pang'onopang'ono. Pambuyo pa kukhazikitsidwa kwa gawoli, adasintha ziwiri mu Early Paleozoic (zaka 450 ~ 400 miliyoni) ndi Late Paleozoic (280 ~ 260 miliyoni zaka) motsatira. Kusintha kumeneku kunapangitsa kuti dziko lapansi likhale losowa komanso kupangidwa kwa mchere watsopano, koma panalibenso kuwonjezereka kwachilendo kwa dziko lachilendo.
(3) Kugawidwa kwa miyala ya carbonate kuwululidwa kuchokera ku zotsatira zosinthika za maginito anomalies ali ndi makhalidwe oyambira kugawa kummawa ndi kumadzulo. Mwala waukulu ndi kum'mawa ore ndi madera akuluakulu maginito thupi kugawa. The ore waukulu ndi kum'mawa ore olumikizidwa carbonate miyala kugawa madera, ndi chitukuko cha kuya kwa miyala carbonate ndi yaikulu. The mkulu maginito anomaly thupi ndi otsika resistivity anomaly thupi amavumbulutsa atatudimensional kugawa carbonate thanthwe (ore thupi) (mkuyu 2). Mpweya wa carbonatite ku Bayan Obo uli ndi malo olowera ndipo umasangalala ndi njira yomweyo ya magma kukuya. Pakatikati pali pakati pa miyala yayikulu ndi miyala yakum'mawa. Pambuyo pa kukhazikitsidwa kwa carbonated magma, foliation yotsetsereka yomwe imapangidwa ndi kusinthidwa kwa mapangidwe oyambirira amakankhidwira kumadzulo (mgodi wakumadzulo) ndi kum'mawa (Huahua) motsatira, ndipo bifurcation ndi kuphatikiza zingatheke (mkuyu 3).
Chithunzi cha 3 Spatial distribution model of carbonatite in Baiyunebo deposit
(4) Baiyunebo carbonatite ili ndi voliyumu yayikulu komanso kuchuluka kwa chisinthiko, chomwe ndi chinthu chofunikira kwambiri pakuunjikira kwake kwapadziko lapansi kosowa. Kutengera kugawa komwe kwapezeka, kuchuluka ndi (kuchepera) kachulukidwe wa miyala ya carbonate (rare earth ore body), komanso kugwiritsa ntchito 2% yapadziko lapansi yosowa mwala wonse wa thanthwe la carbonate (kutengera mtengo wokhazikika womwe umapezeka kuchokera ku datayo. M'zaka zapitazi), akuti gwero lomwe lingathe kukhala losazama kwambiri la Earth oxide m'dera lamigodi la Baiyunebo ndi matani 333 miliyoni, omwe ndi pafupifupi ka 10 kuposa mtengo womwe umadziwika kuti 36 miliyoni. matani ku Baiyunebo, Zopezeka zapadziko lonse lapansi zomwe zatulutsidwa kumene (kuphatikiza Bayan Obo) ndi United States Geological Survey ndi nthawi 2.78 za matani 120 miliyoni.
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Nthawi yotumiza: Mar-02-2023