Hydrothermal genesis of Nb mineralization in the giant Bayan Obo …
The Bayan Obo REE-Nb-Fe deposit is located on the north margin of the North China Craton (NCC) (Fig. 1).Archean and Paleoproterozoic metamorphic basement rocks are preserved in this region (Liu et al., 2011).During the breakup of Columbia Supercontinent, a series of Paleo-Mesoproterozoic (~1.8–1.4 Ga; Zhong et al., 2015, Liu …
Geotectonically, the Bayan Obo ore deposit is situated on the northern margin of the Inner Mongolian plat- form. The basement in the region consists of the Pro- terozoic Wutai Group and Bayan Obo Group. The deposit is located in the Bayan Obo syncline, which includes, in ascending order, three major rock groups:
Bayan Obo – Wikipedia tiếng Việt
Bayan Obo, giản thể: ; phồn thể: ; bính âm: Báiyún Èbó Kuàngqū, Hán Việt: Bạch Vân Ngạc Bác khoáng khu), hay Baiyun-Obo hoặc Baiyun'ebo, là một đơn vị hành chính trực thuộc thành phố Bao Đầu, khu tự trị Nội Mông Cổ, Trung Quốc.Đây là một khu vực khai khoáng ở phía tây của Nội Mông và ...
The Bayan Obo (China) giant REE accumulation
In the Bayan Obo deposit, REE ores are hosted in dolomites (including coarse-grained and fine-grained varieties), and many carbonatite dikes (ferroan, magnesian, and calcic) have …
(PDF) Geological features and genesis of the Bayan …
Abstract. Geotectonically, the Bayan Obo deposit is located on the northern margin of the North China platform. When the Proterozoic Bayan Obo Group was formed, the area was probably a rift...
A review of the genesis of the world class Bayan Obo …
The Bayan Obo area is located on the northern margin of the North China Craton, bordered to the north by the Central Asian Orogenic Belt (Yang et al., 2011a; Fig. 2 A).The North China Craton formed through the accretion of microcontinental blocks from 2.2 Ga to ~ 1.85 Ga (Zhao et al., 2011).The basement to the area consists of the Archaean …
Detail mineralogical study and geochronological framework of Bayan Obo …
The Bayan Obo carbonatite-associated REE–Fe–Nb deposit in Northern China is the world's main supplier of REE, and also host a significant Nb resources of 2.2 Mt Nb 2 O 5 at an average grade of 0.13 % (Chao, 1997, Fan et al., 2016, Fig. 1).The Bayan Obo deposit exhibits a combination of characteristics of mantle-derived carbonatite and …
Ar-Ar and zircon SHRIMP geochronology of hornblendite …
The northern Darhan Muminggan Joint Banner of Inner Mongolia, geotectonically crossing two geological-structural units, is divided into two parts by Bayan Obo-Chifeng deep fault (plate boundary fault). To the south of the deep fault is the North China block, and to the north is the accretion zone at the northern edge of North China plate. An important …
Genesis of the world's largest rare earth element deposit, Bayan Obo …
The unique, giant, rare earth element (REE) deposit at Bayan Obo, northern China, is the world's largest REE deposit. It is geologically complex, and its genesis is still debated. Here, we report in situ Th-Pb dating and Nd isotope ratios for monazite and Sr isotope ratios for dolomite and apatite from fresh drill cores. The measured monazite ...
The formation of the giant Bayan Obo REE-Nb-Fe deposit, …
The Bayan Obo Group accumulated over 10 km thick sediments, consisting of sandstone, siltstone, limestone and dolomite. It is divided into a lower regressive series (members H1–H10) and a upper transgressive series (members H11–H18), both of which have been affected by regional epi-metamorphism and local contact metamorphism …
Ore-controlling structure and deep prospecting of the Bayan Obo …
Analysis on folds and faults of the Bayan Obo REE-Nb-Fe orefield indicates that its structural activities witnessed multi-stage evolution.There exist at least four periods of structural activities from Mesoproterozoic to Hercynian which control metallogenesis and diagenesis, including the nearly EW-trending litho-controlling fault (F1), the nearly EW …
Multistage ore formation in the world's largest REE-Nb-Fe …
The Bayan Obo deposit is located on the northern margin of the North China Craton (NCC), adjacent to the Central Asian Orogenic Belt in the north, and near the convergence of the Siberian Plate and the North China Plate (Fig. 1 a).The deposit is regarded to be closely related to a huge continental rift zone system formed during the …
Geological features and genesis of the Bayan Obo …
Geotectonically, the Bayan Obo deposit is located on the northern margin of the North China platform. When the Proterozoic Bayan Obo Group was formed, the …
Colourless aegirine in metamorphic rocks from Bayan Obo …
Detailed compositional data for the Bayan Obo aegirine and for aegirine and aegirine-augite from nepheline syenites from the Boavista Island (Cape Verde Archipelago), and from other geological settings, reveal that the Bayan Obo aegirine is characterised by significantly lower Ti contents (< 0.5 wt.% TiO 2) with respect to the aegirine from ...
Occurrence of niobium in biotite-type Fe-REE-Nb ore in the Bayan Obo …
The Bayan Obo Fe-REE-Nb deposit is the largest rare earth deposit in the world, which contains huge amount of niobium resources. The niobium reserves are estimated to 16.92 mT (at the grade of 0.1859% Nb 2 O 5), accounting for 63.4% of China's niobium resources (Mackay and Simandl, 2014; Xie et al., 2016; He et al., 2018; Li et al., …
Giant Rare Earth Element Accumulation Related to
The giant Bayan Obo deposit in China represents the largest rare earth element (REE) resource in the world, but the mechanisms for its highly anomalous REE enrichment have long been controversial. The central debate concerns the nature and origin of the ore-hosting dolomite. In this study, a texturally constrained microanalytical study of ...
A novel approach for recovery of rare earths and niobium from Bayan Obo
A novel approach was employed for recovering RE and Nb from Bayan Obo tailings. •. Sulfating leaching and multiple hydrolysis were adoped in the process. •. Ti 4+ and Fe 3+ ions were reduced to Ti 3+ and Fe 2+ ions before hydrolysis. •. Impurities of Nb product were removed partly with NH 3 ⋅H 2 O–H 2 C 2 O 4 system.
Metasomatic silicate chemistry at the Bayan Obo Fe–REE–Nb …
The Bayan Obo Fe–REE–Nb deposit is located in Inner Mongolia, China (109° 59′ E; 41° 48′ N), and has estimated total reserves of 600 Mt of iron oxides (Yuan et al., 1992) and in excess of 100 Mt REE–oxide (Ren, 1985).The deposit is contained within the sediments of the Proterozoic Bayan Obo Group (Fig. 1), which consists …
New data of the Bayan Obo Fe–REE–Nb deposit, Inner …
The Bayan Obo REE–Nb–Fe deposit is located in Inner Mongolia, China (109°59′E, 41°48′N), about 2 km from the Bayan Obo town (Fig. 1 a).The REE ore-bodies are principally hosted in the H8 dolomite marble of the Bayan Obo Group (Nie et al., 2002), and historically, have primarily been mined for their Fe-ore (magnetite).The Bayan Obo …
bayan obo geotectonically
Abstract Geotectonically, the Bayan Obo deposit is located on the northern margin of the North China platform. When the Proterozoic Bayan Obo Group was formed, the area was probably a rift tectonic environment. Dolomite, the main wall rock (or host rock) of the orebody of the Bayan Obo REE deposit, shows a distinct stratified structure and is ...
Identification of ~1.3 Ga hydrothermal zircon from the giant Bayan Obo …
DOI: 10.1016/J.OREGEOREV.2021.104405 Corpus ID: 238706887; Identification of ~1.3 Ga hydrothermal zircon from the giant Bayan Obo REE deposit (China): Implication for dating geologically-complicated REE ore system
Electrical Structure between the Main and Eastern …
Bayan Obo is a well-known polymetallic deposit containing significant quantities of rare earth elements, niobium, thorium, and iron. However, the epoch in …
The giant Bayan Obo REE-Nb-Fe deposit, China: …
Bayan Obo ore deposit is the largest rare-earth element (REE) resource, and the second largest niobium (Nb) resource in the world. Due to the complicated …
Bayan Obo: The Chinese Mine That Makes All Gadgets Possible
But nothing could be further than the truth. The level of pollution in Baotou, a city located 120 kilometers south of the Bayan Obo mines, is nauseating. The prefecture-level city where the factories and refineries are located, is home to 2.6 million people. Skyline of Baotou. Photo credit: Liam Young/Unknown Fields.
Constraints and insights into the tectonics of the …
Combined with previous geological, geochemical, and geophysical studies, our results reveal the possible 3D spatial distribution of the ore-bearing dolomite beneath the Bayan …
Mineralogy and element geochemistry of the Bayan Obo …
The Bayan Obo REE-Nb-Fe deposit is the largest REE deposit worldwide, with REE reserves of over 57.4 million tons (Mt) (average grade 6 wt% of REE 2 O 3), Nb reserves of 2.16 Mt (average grade 0.13 % of Nb 2 O 3), and Fe reserves of at least 1500 Mt (average grade 35 % of iron oxides) (Fang et al., 2016). The deposit is located on the …
Identification of ~1.3 Ga hydrothermal zircon from the giant Bayan Obo …
The Bayan Obo deposit locates in the northern margin of the North China Craton (Fig. 1).The basement rocks to the area consist of Neoarchean (~2.5 Ga) mylonitic granite-gneiss, and Paleoproterozoic (~2.0 to ~ 1.9 Ga) syenite, granodiorite and granite-gneiss (Wang et al., 2002, Fan et al., 2010).Starting around 1.8 Ga, the North China …
Zircon Hf isotopic compositions of the basement gneiss in Bayan Obo …
@article{Wei2023ZirconHI, title={Zircon Hf isotopic compositions of the basement gneiss in Bayan Obo: Constraints on crustal evolution of the Yinshan Block in the North China Craton}, author={Ying Wei and Mingxing Ling and Hong Zhang and Yulong Liu and Xiao-Yong Yang}, journal={Solid Earth Sciences}, year={2023}, url={https://api ...
Iron isotopic constraints on the genesis of Bayan Obo ore …
Bayan Obo REE-Nb-Fe ore deposit in Inner Mongolia is the largest light REE deposit in the world. It is located in the northern margin of the North China Craton (Wang et al., 1992), and hosted in Mesoproterozoic Bayan Obo Group (Li, 1959).The Bayan Obo Group consists of an over 10 km thick succession of low-grade metamorphosed …
Paleozoic remelting of carbonatite in Bayan Obo (China): …
The Bayan Obo Group, a set of Paleoproterozoic-Mesoproterozoic rifting sedimentary formation (Fig. 1), is a suite of nearly 10 km thick weakly metamorphosed sedimentary rock series, un-conformably overlying the metamorphic basement. The main rock types are clastic rock, shale, and carbonate rocks. In the Bayan Obo area, this set …