Isici somhlaba siyilungu elibalulekile lezinsimbi ezibalulekile.Isipho somhlaba esingavamile saseShayina siphakeme futhi sivela ikakhulukazi ku-Baiyun Obo, idiphozithi yomhlaba eyivelakancane eyivelakancane kakhulu emhlabeni.Kodwa-ke, ngenxa yezingqinamba zezinhloso zokuhlola imayini, ithiyori yokumbiwa phansi komhlaba eyivelakancane kanye nobuchwepheshe bokuhlola, kuye kwaba nokuqonda okuhlukene kwendlela yayo yokunothisa insimbi, i-ore body spatial morphology kanye nemithombo engaba khona, ekhawulela ukuhlolwa kanye nokusetshenziswa ngempumelelo kwemithombo yomhlaba eyivelakancane. .Ukuze kucaciswe indlela yokwakheka kwediphozi ye-Bayan Obo futhi kuhlolwe izinsiza ezingaba khona zomhlaba ongavamile, i-Institute of Geology and Geophysics ye-Chinese Academy of Sciences yatshala amaphrojekthi abalulekile futhi yabambisana ne-Baotou Iron and Steel (Group) Co., Ltd. kanye namayunithi ayo ahlobene ukuze enze inhlolovo yejiyoloji yesifunda enemininingwane eminingi, ukubuyekezwa kwesikali semephu yezwe yesilinganiso esingu-1:5000, inhlolovo ye-geophysical ehlanganisa izindlela eziningi nezikali eziningi kanye nocwaningo lwe-metallogenic e-Bayan Obo.Ngocwaningo oluhlanganyelwe lwe-geology, geochemistry, geophysics kanye nezinye iziyalo, inqubo yokuziphendukela kwemvelo ye-Bayan Obo carbonatite magma kanye nendlela yokunothisa yomhlaba ongavamile kuye kwavezwa, indlela yokufaka i-carbonatite kanye nezici zokulawula insimbi yesakhiwo kuye kwacaciswa, ezintathu- ukwakheka kwe-dimensional ye-ore-bearing geological body yakhiwe, futhi imithombo yomhlaba engaba khona eyivelakancane iye yahlolwa kabusha.(1) Indawo yase-Baiyunebo ihlangabezane nokunyakaza kwe-tectonic okuningi.Ngaphambi kokubekwa kwamatshe e-carbonate, amatshe e-Proterozoic sedimentary asekuqaleni amaphakathi (i-Baiyunebo group quartz sandstone, conglomerate, slate, njll.) endaweni yezimayini enze isenzo se-tectonic sokucindezela kwesifunda, futhi i-strata evundlile ithathelwe indawo izakhiwo zokwenza amatshe amatshe. ukwakheka kwekhekhe, i-mylonite, ukugoqa, njll. I-EW esanda kwakhiwa ethrendayo kanye ne-tectonic schistosity ewumqansa inikeza umgudu ovumayo wokukhushulwa kwe-carbonated magma yeminyaka engu-~ 1.3 billion (Fig. 1).Ukusatshalaliswa, ukuchayeka kanye nobudlelwano phakathi kokuqala noma sekwephuzile kwamatshe e-sedimentary e-Middle Proterozoic Baiyunebo Group endaweni yezimayini kudingeka kuphinde kubhekwe.
Umfanekiso 1 Umlando wokuThuthukiswa kanye nokufakwa kwe-carbonatite ye-Mesoproterozoic Bayan Obo basin
(2) I-Baiyunebo H8 dolomite iyidwala elivuthayo le-carbonate, elinobudlelwane obusobala obuphazamisayo nedwala elizungezile.I-Carbonate rock iyidwala elingumzali le-rare earth mineralization kanye nomzimba we-earth ore ongavamile.Ukuqoqwa kwezinsimbi ezinkulu e-Bayan Obo kwenzeka eminyakeni engu-~ 1.3 billion.I-Carbonic magma inomkhuba wokuvela kwe-iron-magnesium-calcareous, futhi izakhi zomhlaba ezingavamile emadwaleni e-carbonate ezigabeni ezihlukene, ikakhulukazi izakhi zomhlaba ezingavamile ezikhanyayo, zibonisa inkambiso yokunothisa kancane kancane.Ngemuva kokwakhiwa kwediphozithi, kube nezinguquko ezimbili ku-Early Paleozoic (iminyaka eyizigidi ezingu-450 ~ 400) kanye ne-Late Paleozoic (iminyaka eyizigidi ezingu-280 ~ 260) ngokulandelanayo.Inqubo yoguquko yaholela ekusebenzeni komhlaba ongavamile kanye nokwakhiwa kwamaminerali amasha, kodwa kwakungekho okusobala okungeziwe komhlaba ongavamile wangaphandle.
(3) Ukusatshalaliswa kwamatshe e-carbonate okuvezwe emiphumeleni eguquguqukayo ye-anomalies kazibuthe kunezici eziyisisekelo zokusatshalaliswa kwempumalanga-ntshonalanga.I-ore eyinhloko kanye ne-east ore yizindawo eziyinhloko zokusabalalisa umzimba kazibuthe.I-ore eyinhloko kanye ne-east ore kuxhunywe izindawo zokusabalalisa amadwala e-carbonate, futhi ukujula kokuthuthukiswa kwamadwala e-carbonate kukhulu.Umzimba ophakeme kazibuthe odidayo kanye nomzimba we-resistive anomaly ophansi uveza ukusatshalaliswa kwezinhlangothi ezintathu kwetshe le-carbonate (umzimba wensimbi) (Fig. 2).I-carbonatite e-Bayan Obo inendawo yokubeka futhi ijabulela isiteshi se-magma esifanayo endaweni ejulile.Isikhungo sitholakala phakathi kwe-ore eyinhloko ne-east ore.Ngemuva kokufakwa kwe-carbonated magma, i-foliation ewumqansa eyakhiwe ngokushintshwa kwesakhiwo sakuqala iphushwa iye entshonalanga (imayini yasentshonalanga) nasempumalanga (Huahua) ngokulandelana, futhi ukuhlanganisa kabili nokuhlanganisa kungenzeka (Fig. 3).
Umdwebo 3 Imodeli yokusabalalisa yendawo ye-carbonatite kudiphozi ye-Baiyunebo
(4) I-Baiyunebo carbonatite inomthamo omkhulu nezinga eliphezulu lokuziphendukela kwemvelo, okuyisici esiyinhloko sokunqwabelana kwayo komhlaba okungavamile.Ngokusekelwe ebangeni lokusabalalisa elitholiwe, ivolumu kanye (ubuncane) bokuminyana be-carbonate rock mass (umzimba we-earth ore eyivelakancane), kanye nokusebenzisa umhlaba ongavamile ongu-2% walo lonke idwala le-carbonate rock (ngokusekelwe enanini elilinganiselwe elitholwe kudatha. phakathi neminyaka), kulinganiselwa ukuthi umthombo ongaba khona we-oxide yomhlaba engashoni engashoni endaweni yezimayini zase-Baiyunebo ungamathani ayizigidi ezingu-333, okuyisilinganiso esiphindwe izikhathi ezingu-10 inani lamanje eliqashelwayo lamathani ayizigidi ezingu-36 e-Baiyunebo, Ingqikithi esanda kukhululwa yomhlaba wonke ibonakale iyivelakancane izinsiza (kuhlanganise ne-Bayan Obo) yi-United States Geological Survey izikhathi ezingu-2.78 zamathani ayizigidi ezingu-120.
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Isikhathi sokuthumela: Mar-02-2023