The survey of fluorite ore resources in Shangkuli area is based on years of data collection and research in the survey area and mineral inspection to select some favorable ore-forming sections. It summarizes the metal...The survey of fluorite ore resources in Shangkuli area is based on years of data collection and research in the survey area and mineral inspection to select some favorable ore-forming sections. It summarizes the metallogenic geological background, strata, magmatic rocks, structures and other metallogenic geological conditions in the survey area. It synthesizes the geological, geophysical, geochemical and remote sensing anomalies and the temporal and spatial distribution laws of minerals in the survey area, systematically summarizes the mineralization laws of the ore-controlling factors of fluorite ore in the survey area, conducts the prediction research on typical deposits and regional minerals, divides the prospecting areas and selects 2 prospecting target areas. Through anomaly verification and ore spot inspection, one new mineral spot, six ore spots and eight mineralized spots have been discovered, and a number of geochemical anomalies of 1: 50,000 have been circled, and the resources have been predicted and estimated respectively.展开更多
The Bayan Obo supergiant carbonatite-related rare-earth-element-niobium-iron(REE-Nb-Fe) endogenetic deposit(thereafter as the Bayan Obo deposit), located at 150 km north of Baotou City in the Inner Mongolia Autonomous...The Bayan Obo supergiant carbonatite-related rare-earth-element-niobium-iron(REE-Nb-Fe) endogenetic deposit(thereafter as the Bayan Obo deposit), located at 150 km north of Baotou City in the Inner Mongolia Autonomous Region, is the largest rare-earth element(REE) resource in the world. Tectonically,this deposit is situated on the northern margin of the North China Craton and adjacent to the Xing’anMongolian orogenic belt to the south. The main strata within the mining area include the Neoarchean Se’ertengshan Group and the Mesoproterozoic Bayan Obo Group. Generally, the rare earth, niobium, and iron mineralization within the deposit are intrinsically related to the dolomite carbonatites and the extensive alteration of the country rocks caused by the carbonatite magma intrusion. The alteration of country rocks can be categorized into three types: contact metasomatism(anti-skarn and skarn alteration), fenitization,and hornfelsic alternation. As indicated by previous studies and summarized in this review, the multielement mineralization at Bayan Obo is closely associated with the metasomatic replacement of siliceous country rocks by carbonatite magmatic-hydrothermal fluids. The metasomatic process is comparable to the conventional skarnification that formed due to the intrusion of intermediate-acid magmatic rocks into limestone strata. However, the migration pattern of Si O2, Ca O, and Mg O in this novel metasomatic process is opposite to the skarn alteration. Accordingly, this review delineates, for the first time, an antiskarn metallogenic model for the Bayan Obo deposit, revealing the enigmatic relationship between the carbonatite magmatic-hydrothermal processes and the related iron and rare earth mineralization.Moreover, this study also contributes to a better understanding of the REE-Nd-Fe metallogenetic processes and the related fluorite mineralization at the Bayan Obo deposit.展开更多
文摘The survey of fluorite ore resources in Shangkuli area is based on years of data collection and research in the survey area and mineral inspection to select some favorable ore-forming sections. It summarizes the metallogenic geological background, strata, magmatic rocks, structures and other metallogenic geological conditions in the survey area. It synthesizes the geological, geophysical, geochemical and remote sensing anomalies and the temporal and spatial distribution laws of minerals in the survey area, systematically summarizes the mineralization laws of the ore-controlling factors of fluorite ore in the survey area, conducts the prediction research on typical deposits and regional minerals, divides the prospecting areas and selects 2 prospecting target areas. Through anomaly verification and ore spot inspection, one new mineral spot, six ore spots and eight mineralized spots have been discovered, and a number of geochemical anomalies of 1: 50,000 have been circled, and the resources have been predicted and estimated respectively.
基金jointly funded by the National Key Research and Development Program of China (2022YFC2905301)the National Natural Science Foundation of China (42072114)+1 种基金geological survey projects (DD20230366, DD202211695)the scientific research projects supported by the Baotou Steel (Group) Co., Ltd. (HE2224, HE2228, and HE2313)。
文摘The Bayan Obo supergiant carbonatite-related rare-earth-element-niobium-iron(REE-Nb-Fe) endogenetic deposit(thereafter as the Bayan Obo deposit), located at 150 km north of Baotou City in the Inner Mongolia Autonomous Region, is the largest rare-earth element(REE) resource in the world. Tectonically,this deposit is situated on the northern margin of the North China Craton and adjacent to the Xing’anMongolian orogenic belt to the south. The main strata within the mining area include the Neoarchean Se’ertengshan Group and the Mesoproterozoic Bayan Obo Group. Generally, the rare earth, niobium, and iron mineralization within the deposit are intrinsically related to the dolomite carbonatites and the extensive alteration of the country rocks caused by the carbonatite magma intrusion. The alteration of country rocks can be categorized into three types: contact metasomatism(anti-skarn and skarn alteration), fenitization,and hornfelsic alternation. As indicated by previous studies and summarized in this review, the multielement mineralization at Bayan Obo is closely associated with the metasomatic replacement of siliceous country rocks by carbonatite magmatic-hydrothermal fluids. The metasomatic process is comparable to the conventional skarnification that formed due to the intrusion of intermediate-acid magmatic rocks into limestone strata. However, the migration pattern of Si O2, Ca O, and Mg O in this novel metasomatic process is opposite to the skarn alteration. Accordingly, this review delineates, for the first time, an antiskarn metallogenic model for the Bayan Obo deposit, revealing the enigmatic relationship between the carbonatite magmatic-hydrothermal processes and the related iron and rare earth mineralization.Moreover, this study also contributes to a better understanding of the REE-Nd-Fe metallogenetic processes and the related fluorite mineralization at the Bayan Obo deposit.
