Ilungu lomhlaba lilungu elibalulekileyo leentsimbi eziphambili. Ubutyebi bomhlaba obunqabileyo baseTshayina bugqwesile kwaye ubukhulu becala buvela kwi-Baiyun Obo, idipozithi yomhlaba enqabileyo kakhulu enkulu kakhulu emhlabeni. Nangona kunjalo, ngenxa yemiqobo yeenjongo zokuphonononga imigodi, ithiyori yomhlaba onqabileyo wokumbiwa kwezimbiwa kunye netekhnoloji yokuhlola, kuye kwakho ukuqonda okwahlukileyo kwendlela yayo enkulu yokutyebisa isinyithi, i-ore body spatial morphology kunye nemithombo enokubakho, ethi ithintele uvavanyo kunye nokusetyenziswa okusebenzayo kobutyebi bomhlaba obunqabileyo. . Ukuze kucaciswe indlela yokwenziwa kwediphozithi ye-Bayan Obo kunye nokuvavanya ubuncwane obunokubakho bomhlaba onqabileyo, i-Institute of Geology kunye ne-Geophysics ye-Chinese Academy of Sciences isasaze iiprojekthi eziphambili kwaye isebenzisane ne-Baotou Iron and Steel (Group) Co., Ltd. . kunye neeyunithi ezihambelanayo zokwenza uphando lwejoloji oluneenkcukacha zommandla, uhlaziyo lwesikali semephu yejoloji ye-1:5000, iindlela ezininzi kunye . multi-scale olunzulu uphando geophysical kunye nophando metallogenic eBayan Obo. Ngophando oludibeneyo lwe-geology, i-geochemistry, i-geophysics kunye nolunye uqeqesho, inkqubo ye-evolution ye-Bayan Obo carbonatite magma kunye nendlela yokutyebisa yomhlaba onqabileyo iye yatyhilwa, indlela yokufakwa kwe-carbonatite kunye ne-structural-ore-control factor ziye zacaciswa, ezintathu- ubume bobukhulu bomzimba wejoloji othwele intsimbi iye yakhiwe, kwaye ubutyebi bomhlaba obunqabileyo obunokubakho buphinde bavavanywa. (1) Ummandla we-Baiyunebo uye wafumana iintshukumo ezininzi ze-tectonic. Ngaphambi kokubekwa kwamatye e-carbonate, amatye e-proterozoic sedimentary asekuqaleni (i-Baiyunebo iqela le-quartz sandstone, i-conglomerate, i-slate, njl.njl.) kwindawo yemigodi iye yafumana isenzo se-tectonic soxinzelelo lwengingqi, kwaye indawo ethe tye yatshintshwa yizakhiwo zokwenza igrabile. ukwakheka kwekeyiki, imylonite, gonga, njalo njalo. Esandula ukubunjwa phantse i-EW ihamba kunye nethambeka itectonic schistosity ibonelela ngomjelo oncomekayo wokunyusa i-carbonated magma ye-~ 1.3 yebhiliyoni yeminyaka (Fig. 1). Ukusasazwa, ukufakwa kunye nobudlelwane phakathi kwasekuqaleni nasemva kwexesha lamatye entlenga eMbindi Proterozoic Baiyunebo Group kwindawo yemigodi kufuneka iphinde iphononongwe.
Umfanekiso we-1 Imbali yoPhuhliso kunye nokufakwa kwe-carbonate ye-Mesoproterozoic Bayan Obo basin
(2) I-Baiyunebo H8 dolomite lilitye eline-carbonate elivuthayo, elinobudlelwane obucacileyo bonxibelelwano kunye nelitye elijikelezileyo. Ilitye leCarbonate lilitye elingumzali le-mineralization yomhlaba enqabileyo kunye nomzimba onqabileyo womhlaba. Ukuqokelelwa kweentsimbi ezinkulu kwi-Bayan Obo kwenzeka kwi-~ 1.3 yezigidigidi zeminyaka. I-Carbonic magma ine-trend of evolution ukusuka kwi-iron-magnesium-calcareous, kunye nezinto ezinqabileyo zomhlaba kumatye e-carbonate kwizigaba ezahlukeneyo, ngakumbi ukukhanya okunqabileyo komhlaba, kubonisa umkhwa wokutyebisa ngokuthe ngcembe. Emva kokubunjwa kwediphozithi, yafumana iinguqu ezimbini kwi-Early Paleozoic (iminyaka eyi-450 ~ 400 yezigidi) kunye ne-Late Paleozoic (i-280 ~ 260 yezigidi zeminyaka) ngokulandelanayo. Inkqubo yenguqu ikhokelele ekubeni kusebenze umhlaba onqabileyo kunye nokwakhiwa kwezimbiwa ezintsha, kodwa kwakungekho nto icacileyo yokongeza umhlaba onqabileyo wangaphandle.
(3) Ukusasazwa kwamatye e-carbonate abonakaliswe kwiziphumo eziguquguqukayo ze-anomalies yamagnetic kuneempawu ezisisiseko zokusasazwa kwempuma-ntshona. I-ore ephambili kunye ne-ore yasempuma zezona ndawo ziphambili zokusabalalisa umzimba wamagnetic. I-ore engundoqo kunye ne-ore yasempuma idibaniswe neendawo zokusabalalisa i-carbonate rock, kwaye ubunzulu bophuhliso lwamatye e-carbonate bukhulu. Umzimba ophezulu wemagnethi ongaqhelekanga kunye nomzimba ophantsi wokuxhathisa ubonisa ukuhanjiswa kwe-carbonate rock (umzimba we-ore) (Fig. 2). I-carbonatite e-Bayan Obo ineziko le-emplacement kwaye iyonwabela itshaneli ye-magma efanayo kwindawo enzulu. Iziko liphakathi kwentsimbi ekrwada engundoqo kunye nentsimbi yasempuma. Emva kokufakwa kwe-carbonated magma, i-foliation enqabileyo eyenziwe ngokutshintshwa kwesakhiwo sokuqala sityhalelwa ngasentshona (imigodi yasentshona) kunye nempuma (Huahua) ngokulandelanayo, kunye ne-bifurcation kunye nokudibanisa kunokwenzeka (Fig. 3).
Umzobo we-3 Imodeli yokusabalalisa indawo ye-carbonatite kwidiphozithi ye-Baiyunebo
(4) I-Baiyunebo carbonatite inomthamo omkhulu kunye neqondo eliphezulu lokuziphendukela kwemvelo, eyona nto iphambili ekuqokeleleni kwayo umhlaba onqabileyo. Ngokusekwe kuluhlu olufunyenweyo losasazo, umthamo kunye (ubuncinci) bobunzima belitye lecarbonate (umzimba onqabileyo womhlaba), kunye nokusebenzisa isiqulatho somhlaba esinqabileyo se-2% salo lonke iliwa le-carbonate rock (ngokusekwe kwi-conservative average value efunyenwe kwidatha Ukutyhubela iminyaka), kuqikelelwa ukuba ubuncwane obunokubakho bomhlaba ongekho nzulu okrwada onqabileyo kwindawo yemigodi yaseBaiyunebo ziitoni zezigidi ezingama-333, nto leyo ephantse ibe li-10 kunexabiso elivunyiweyo langoku le-36 yezigidi. iitoni e-Baiyunebo, Itotali esanda kukhutshwa yehlabathi engqiniweyo enqabileyo yobutyebi bomhlaba (kuquka i-Bayan Obo) yi-United States Geological Survey yi-2.78 yamaxesha e-120 lezigidi zeetoni.
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Ixesha lokuposa: Mar-02-2023