Earth element inhengo yakakosha yesimbi dzakakosha. Chipo cheChina chisingawanikwe chezviwanikwa chepasi chakakwirira uye kunyanya chinobva kuBaiyun Obo, isingawanzo kuwanikwa pasi rose. Nekudaro, nekuda kwezvimhingamipinyi zvezvinangwa zvekutsvagisa zvimbambaira, isingawanzo dzidziso yepasi mineralization uye tekinoroji yekuongorora, pakave nekunzwisisa kwakasiyana kwehukuru hwayo hwekupfumisa simbi, ore body spatial morphology uye zviwanikwa, izvo zvinotadzisa kuongororwa uye kushandiswa kwakanaka kwezviwanikwa zvisingawanzo pasi. . Kuitira kujekesa magadzirirwo edhipoziti yeBayan Obo uye kuongorora zviwanikwa zvepasi risingawanzo, Institute of Geology uye Geophysics yeChinese Academy of Sciences yakatumira mapurojekiti akakosha uye yakabatana neBaotou Iron and Steel (Group) Co., Ltd. . nezvikamu zvaro zvakabatana kuita ongororo yejooloji yedunhu, kudzokororwa kwechikamu che1:5000 mepu yejoloji, nzira dzakasiyana-siyana uye . Multi-scale yakazara geophysical ongororo uye metallogenic research muBayan Obo. Kuburikidza nekutsvagisa kwakabatana kwe geology, geochemistry, geophysics uye zvimwe dzidziso, shanduko yeBayan Obo carbonatite magma uye nzira yekupfumisa yepasi isingawanzo yaburitswa, iyo carbonatite implacement mechanism uye zvimiro zveore-control zvinhu zvakajekeswa, izvo zvitatu- dimensional chimiro cheore-bearing geological body chakavakwa, uye zvingangoitika zvepasi zviwanikwa zvakaongororwazve. (1) Baiyunebo nzvimbo yakasangana neakawanda tectonic mafambiro. Pamberi pekuiswa kwecarbonate matombo, yekutanga-yepakati Proterozoic sedimentary matombo (Baiyunebo boka quartz sandstone, conglomerate, slate, nezvimwewo) munzvimbo yemigodhi yakaitwa yedunhu compressional tectonic chiito, uye yakachinjika strata yakatsiviwa nezvivakwa kuita matombo. keke chimiro, mylonite, peta, etc. Iyo ichangobva kuumbwa inenge EW inofamba uye inokwidza tectonic schistosity inopa nzira yakanaka yekukwidziridza carbonated magma ye~ 1.3 bhiriyoni emakore (Fig. 1). Kugovera, kupihwa uye hukama pakati pekutanga uye kunonoka kwematombo emarara eMiddle Proterozoic Baiyunebo Boka munzvimbo yemugodhi inoda kuongororwa zvakare.
Fig. 1 Nhoroondo yekuvandudza uye carbonatite kuiswa kweMesoproterozoic Bayan Obo basin
(2) Baiyunebo H8 dolomite igneous carbonate rock, ine hukama huri pachena hwekubatana nedombo rakatenderedza. Carbonate dombo ndiro dombo revabereki re isingawanzo pasi mineralization uye zvakare isingawanzo pasi ore muviri. Iko kuunganidzwa kwesimbi huru muBayan Obo kwakaitika mu ~ 1.3 bhiriyoni makore. Carbonic magma ine maitiro ekushanduka-shanduka kubva kune iron-magnesium-calcareous, uye zvisingawanzo zvinhu zvepasi mumatombo e carbonate pamatanho akasiyana, kunyanya chiedza chisingawanzoitiki chepasi, chinoratidza maitiro ekupfumisa zvishoma nezvishoma. Mushure mekuumbwa kwedhipoziti, yakave neshanduko mbiri muPaleozoic Early (450 ~ 400 miriyoni makore) uye Late Paleozoic (280 ~ 260 mamiriyoni emakore) zvichiteerana. Nzira yekushandura yakakonzera kushandiswa kwepasi risingawanzoitiki uye kuumbwa kwezvicherwa zvitsva, asi pakanga pasina kuwedzera kuri pachena kwekunze kwepasi risingawanzoitiki.
(3) Kugovaniswa kwematombo ecarbonate kwakaratidzwa kubva mumigumo yekushanduka kwemagnetic anomalies ine hunhu hwekutanga hwekugovera kumabvazuva-kumadokero. Iyo huru ore uye yekumabvazuva ore ndiyo nzvimbo huru dzekugovera magineti muviri. Iyo huru ore uye yekumabvazuva ore yakabatana carbonate rock yekugovera nzvimbo, uye kudzika kwekukura kwematombo ecarbonate kwakakura. Iyo yakakwira magineti anomaly muviri uye yakaderera resistivity anomaly muviri inoratidza matatu-dimensional kugoverwa kwecarbonate rock (ore body) (Fig. 2). Iyo carbonatite muBayan Obo ine nzvimbo yekumisikidza uye inonakidzwa neiyo magma chiteshi munzvimbo yakadzika. Pakati panowanikwa pakati pechicherwa chikuru neEast ore. Mushure mekuiswa kwecarbonated magma, iyo yakakwirisa foliation inoumbwa nekutsiviwa kwekutanga chimiro inosundirwa kumadokero (kumadokero mugodhi) uye kumabvazuva (Huahua) zvichiteerana, uye bifurcation uye kubatanidza zvinogona kuitika (Fig. 3).
Fig. 3 Spatial distribution model of carbonatite muBaiyunebo deposit
(4) Baiyunebo carbonatite ine vhoriyamu yakakura uye yakakwira dhigirii yekushanduka-shanduka, inova chinhu chakakosha pakuunganidzwa kwayo kwepasi kukuru. Zvichienderana nehuwandu hwekugovera huwandu, vhoriyamu uye (shoma) density yecarbonate rock mass (rare earth ore body), uye kushandisa 2% isingawanzo pasi zvemukati medombo rese recarbonate rock (zvichienderana neavhareji kukosha kwakawanikwa kubva kudata. nekufamba kwemakore), zvinofungidzirwa kuti chitubu chinogona kuita shallow rare earth oxide munzvimbo inocherwa yeBaiyunebo inosvika matani 333 miriyoni, inova kakapetwa ka10 kukosha kwazvino kunozivikanwa kwe36 miriyoni. matani muBaiyunebo, Iyo ichangobva kuburitswa yepasi rose yakaratidza zvisingawanzo zviwanikwa zvepasi (kusanganisira Bayan Obo) neUnited States Geological Survey ndeye 2.78 nguva dze120 miriyoni matani.
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Nguva yekutumira: Mar-02-2023