Ihe mejupụtara ụwa bụ akụkụ dị mkpa nke ọla isi. Onyinye akụrụngwa ụwa nke China na-adịghị ahụkebe dị elu ma na-esite na Baiyun Obo, nnukwu ebe nchekwa ụwa na-adịghị ahụkebe n'ụwa. Otú ọ dị, n'ihi mgbochi nke ebumnobi nchọgharị ogbunigwe, ozizi mineralization ụwa na nkà na ụzụ nyocha, enweela nghọta dị iche iche banyere nnukwu usoro mmepụta ọla ya, morphology nke anụ ahụ na ihe ndị nwere ike ime, nke na-egbochi nleba anya na iji dị irè nke akụrụngwa ụwa na-adịghị ahụkebe. . Iji dokwuo anya usoro nhazi nke nkwụnye ego Bayan Obo ma nyochaa ihe onwunwe nke ụwa dị ụkọ, Institute of Geology and Geophysics of the Chinese Academy of Sciences degara ndị isi ọrụ ma kwado Baotou Iron na Steel (Group) Co., Ltd. . na ngalaba ya jikọrọ ọnụ iji mee nyocha mpaghara ala nke ọma, nyochagharị nke 1: 5000 scale geological map, multi- method and multi-scale comprehensive geophysical survey and metallogenic research in Bayan Obo. Site na nyocha nkwonkwo nke geology, geochemistry, geophysics na usoro ndị ọzọ, egosiputa usoro evolushọn nke Bayan Obo carbonatite magma na usoro ịba ụba nke ụwa na-adịghị ahụkebe, akọwapụtala usoro ntinye carbonatite na ihe njikwa ihe nhazi, nke atọ- Ewubela ụdị ọdịdị ala nke nwere ore, ma tụleghachikwa akụ ndị nwere ike ịdị ụkọ n'ụwa. (1) Mpaghara Baiyunebo enwetala ọtụtụ mmegharị tectonic. Tupu emplacement nke carbonate nkume, na mmalite-n'etiti Proterozoic sedimentary nkume (Baiyunebo otu quartz sandstone, conglomerate, slate, wdg) na Ngwuputa ebe mere Regional compressional tectonic edinam, na kehoraizin strata e dochie anya ihe owuwu na-etolite gravel. achicha Ọdịdị, mylonite, n'ogige atụrụ, wdg The ọhụrụ kpụrụ fọrọ nke nta EW trending na nkpoda tectonic schistosity na-enye a mma ọwa maka upwelling nke carbonated magma nke ~ 1.3 ijeri afọ (Fig. 1). Nkesa, njirimara na mmekọrịta dị n'etiti mmalite na mbubreyo nke nkume sedimentary nke Middle Proterozoic Baiyunebo Group na mpaghara Ngwuputa kwesịrị ka enyochaghachi ya.
Fig. 1 Akụkọ mmepe na ntinye carbonatite nke Mesoproterozoic Bayan Obo basin
(2) Baiyunebo H8 dolomite bụ nkume carbonate na-egbuke egbuke, nke nwere mmekọrịta kọntaktị intrusive doro anya na nkume gbara ya gburugburu. Carbonate nkume bụ nne na nna nkume nke obere ụwa mineralization na nwekwara ụkọ ụwa ore ahu. Mgbakọ nke nnukwu ọla na Bayan Obo mere n'ime ~ 1.3 ijeri afọ. Carbonic magma nwere usoro evolushọn sitere na ígwè-magnesium-calcareous, yana ihe ndị na-adịghị ahụkebe nke ụwa dị na nkume carbonate n'oge dị iche iche, karịsịa ihe ndị na-adịghị ahụkebe ụwa, na-egosi usoro nke ịba ụba nke nta nke nta. Mgbe e guzobere nkwụnye ego ahụ, ọ gbanwere mgbanwe abụọ na Early Paleozoic (450 ~ 400 nde afọ) na Late Paleozoic (280 ~ 260 nde afọ) n'otu n'otu. Usoro mgbanwe ahụ mere ka ọ rụọ ọrụ nke ụwa na-adịghị ahụkebe na nhazi nke mineral ọhụrụ, ma ọ dịghị ihe mgbakwunye doro anya nke ụwa na-adịghị ahụkebe.
(3) Nkesa nke nkume carbonate ekpughere site na nsonaazụ inversion nke magnetik anomalies nwere njirimara bụ isi nke nkesa ọwụwa anyanwụ-ọdịda anyanwụ. Isi ore na ọwụwa anyanwụ bụ akụkụ bụ isi nke nkesa ahụ magnetik. Isi ore na n'ebe ọwụwa anyanwụ na-ejikọta carbonate nkume nkesa nkesa, na mmepe omimi nke carbonate nkume bụ nnukwu. The elu magnetik anomaly ahu na ala resistivity anomaly ahu na-ekpughe atọ akụkụ nkesa nke carbonate nkume (ore ahu) (Fig. 2). Carbonatite dị na Bayan Obo nwere ebe a na-ebugharị ma na-enwe ọwa magma ahụ na akụkụ miri emi. Ebe etiti dị n'etiti isi ọla na ọla ọwụwa anyanwụ. Mgbe emplacement nke carbonated magma, steepụ foliation kpụrụ site nnọchi nke mbụ Ọdịdị na-akpali na n'ebe ọdịda anyanwụ (n'ebe ọdịda anyanwụ m) na n'ebe ọwụwa anyanwụ (Huahua) karị, na bifurcation na merging nwere ike ime (Fig 3).
Fig. 3 Ụdị nkesa oghere nke carbonatite na nkwụnye ego Baiyunebo
(4) Baiyunebo carbonatite nwere nnukwu olu na ogo dị elu nke evolushọn, nke bụ isi ihe na-akpata nnukwu mkpokọta ụwa. Dabere na oke nkesa enwetara, olu na (opekempe) njupụta nke carbonate rock mass (obere ụwa ore ahu), na iji 2% obere ụwa ọdịnaya nke dum nkume carbonate nkume (dabere na conservative nkezi uru enwetara site na data. N'ime afọ ndị gafeworonụ), a na-eme atụmatụ na akụ nwere ike ịnweta ikuku oxide na-adịghị ahụkebe na mpaghara ebe a na-egwupụta akụ Baiyunebo bụ nde tọn 333, nke fọrọ nke nta ka ọ bụrụ okpukpu iri karịa uru a ghọtara ugbu a nke nde tọn 36 na Baiyunebo. akụrụngwa (gụnyere Bayan Obo) nke United States Geological Survey bụ ugboro 2.78 nke nde tọn 120.
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Oge nzipu: Mar-02-2023