He lālā koʻikoʻi ka mea honua o nā metala kī. ʻOi aku ka maikaʻi o ka loaʻa ʻana o ka ʻāina laha ʻole o Kina a no laila mai Baiyun Obo, kahi waihona ʻāina laha nui loa ma ka honua. Eia nō naʻe, ma muli o ke kaohi ʻana o kaʻu mau pahuhopu ʻimi, ka manaʻo mineralization o ka honua a me ka ʻenehana ʻimi, ua ʻike ʻia nā ʻike like ʻole o kāna mīkini hoʻonui nui metala, morphology spatial kino kino a me nā kumuwaiwai hiki ke hoʻopaʻa i ka loiloi a me ka hoʻohana pono ʻana i nā kumuwaiwai honua. . No ka wehewehe ʻana i ke ʻano o ka hoʻokumu ʻana o ka waihona Bayan Obo a loiloi i nā kumu waiwai o ka honua laha, ua hoʻonohonoho ka Institute of Geology and Geophysics o ka Chinese Academy of Science i nā papahana koʻikoʻi a hui pū me Baotou Iron and Steel (Group) Co., Ltd. . ma Bayan Obo. Ma o ka noiʻi hui ʻana o ka geology, geochemistry, geophysics a me nā ʻano aʻoaʻo ʻē aʻe, ua hōʻike ʻia ke kaʻina hana hoʻomohala o Bayan Obo carbonatite magma a me ka hana hoʻonui ʻana o ka honua laʻa, ua wehewehe ʻia ke ʻano o ka carbonatite emplacement a me nā kumu hoʻokele waiwai, ʻekolu- Ua kūkulu ʻia ke ʻano nui o ke kino ʻeleʻele ʻeleʻele, a ua loiloi hou ʻia nā kumu waiwai o ka honua. (1) Ua ʻike ka ʻāina ʻo Baiyunebo i nā neʻe tectonic he nui. Ma mua o ka empplacement o ka carbonate pōhaku, i ka mua-waena Proterozoic sedimentary pohaku (Baiyunebo hui quartz sandstone, conglomerate, slate, etc.) i loko o ka mining wahi i undergone regional compressional tectonic hana, a me ka paepae strata ua paniia e na hale e hana iliili. hale keke, mylonite, fold, etc. Hāʻawi ka schistosity i kahi ala kūpono no ka piʻi ʻana o ka pelemaka carbonated o ~ 1.3 biliona makahiki (Fig. 1). Pono e noʻonoʻo hou ʻia ka māhele ʻana, ka hoʻohui ʻana a me ka pilina ma waena o ka mua a me ka hope o nā pōhaku sedimentary o ka Middle Proterozoic Baiyunebo Group ma kahi eli.
Fig.
(2) ʻO Baiyunebo H8 dolomite ka pōhaku carbonate igneous, nona ka pilina pili pili me ka pōhaku a puni. ʻO ka pōhaku kalapona ka pōhaku makua o ka hoʻoheheʻe ʻia ʻana o ka honua a me ke kino oka honua. ʻO ka hōʻiliʻili ʻana o nā metala nui ma Bayan Obo i hana ʻia ma ~ 1.3 biliona makahiki. ʻO ka pelemaka carbonic ke ʻano o ka hoʻololi ʻana mai ka hao-magnesium-calcareous, a ʻo nā mea ʻeleʻele kakaikahi i loko o nā pōhaku carbonate ma nā pae like ʻole, ʻoi aku ka māmā o nā mea honua laha ʻole, e hōʻike ana i ke ʻano o ka hoʻonui ʻana. Ma hope o ka hoʻokumu ʻia ʻana o ka waihona, ua hoʻololi ʻia ʻelua mau hoʻololi i ka Early Paleozoic (450 ~ 400 miliona mau makahiki) a me ka Late Paleozoic (280 ~ 260 miliona mau makahiki). ʻO ke kaʻina hana hoʻololi i alakaʻi ʻia i ka hoʻāla ʻana o ka ʻāina laha ʻole a me ka hoʻokumu ʻana i nā minerala hou, akā ʻaʻohe mea i hoʻohui ʻia o nā ʻāina ʻē aʻe.
(3) ʻO ka puʻunaue ʻana o nā pōhaku carbonate i hōʻike ʻia mai nā hopena hoʻohuli o nā anomalies magnetic nā hiʻohiʻona kumu o ka mahele hikina-komohana. ʻO ka ʻeleʻele nui a me ka ʻaila hikina nā wahi nui o ka hoʻoili kino kino. ʻO ka ʻeleʻele nui a me ka ʻaila hikina e pili ana i nā wahi hoʻohele pōhaku carbonate, a nui ka hohonu o ka ulu ʻana o nā pōhaku carbonate. ʻO ke kino anomaly magnetic kiʻekiʻe a me ke kino anomaly resistivity haʻahaʻa e hōʻike ana i ka mahele ʻekolu-dimensional o ka pōhaku carbonate (kino oka) (Fig. 2). ʻO ka carbonatite ma Bayan Obo kahi kikowaena empplacement a hauʻoli i ke kahawai pelemaka like ma ka ʻaoʻao hohonu. Aia ke kikowaena ma waena o ka ʻeleʻele nui a me ka ʻaila hikina. Ma hope o ka hoʻokomo ʻia ʻana o ka pelemaka carbonated, ua hoʻoneʻe ʻia ka lau ʻoi i hana ʻia e ka pani ʻana o ka hale mua i ke komohana (koʻu komohana) a i ka hikina (Huahua), a hiki i ka bifurcation a me ka hui ʻana (Fig. 3).
Fig. 3 Ke kŘkohu puunaue spatial o carbonatite ma Baiyunebo waihona
(4) He nui ka nui o ka Baiyunebo carbonatite a me ke kiʻekiʻe o ka hoʻololi ʻana, ʻo ia ke kumu nui o ka hōʻiliʻili ʻana o ka honua. Ma muli o ka laha hoʻolaha i loaʻa, ka nui a me (ka liʻiliʻi) ka nui o ka nui o ka pōhaku carbonate (rare earth ore body), a me ka hoʻohana ʻana i ka 2% o ka honua maʻamau o ka pōhaku holoʻokoʻa o ka pōhaku carbonate (ma muli o ka waiwai awelika conservative i loaʻa mai ka ʻikepili. i loko o nā makahiki), ua manaʻo ʻia ʻo 333 miliona mau tons ke kumu waiwai o ka pāpaʻu o ka honua oxide ma Baiyunebo. Baiyunebo, ʻO ka huina honua hou i hoʻokuʻu ʻia i hōʻike ʻia i nā kumuwaiwai honua laha ʻole (me Bayan Obo) e ka United States Geological Survey he 2.78 manawa o 120 miliona tons.
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Ka manawa hoʻouna: Mar-02-2023