白云鄂博矿床成矿元素空间分布规律及找矿意义

IF 1.7 3区地球科学 Q2 GEOLOGY

岩石学报 Pub Date : 2023-01-01 DOI:10.18654/1000-0569/2023.10.03

YANG KuiFeng, FAN HongRui, QIU ZhengJie, LI XiaoChun, SHE HaiDong, LIU ShuangLiang, LI HongTao, ZHANG LiFeng

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引用次数: 0

摘要

白云鄂博矿床是全球最大的稀土-铌-铁矿床。本文对白云鄂博矿床主矿、东矿赋矿白云岩、不同类型稀土-铌-铁矿石和富钾板岩进行详细的野外地质调查和地球化学成分分析,揭示了成矿元素稀土、铌和主要蚀变元素钠、钾、氟、磷的空间分布规律。结果表明,白云鄂博主采坑比东采坑具有更高的稀土含量,矿体由外围向中心、由浅部向深部有明显的稀土元素(尤其是中-重稀土元素)富集的现象,矿体深部具有更大的中-重稀土元素找矿潜力;成矿元素铌的异常范围与重稀土的异常范围相吻合,表明二者具有密切的共生关系;蚀变元素氟的异常范围与稀土-铌-铁矿体的分布范围相一致,是重要的沉淀成矿元素;蚀变元素磷的异常要明显超过稀土-铌-铁矿体的分布范围,是重要的迁移载体元素;钠化蚀变主要出现在矿体下盘含稀土白云岩中,代表早期高温蚀变过程;钾化蚀变主要发育在矿体上盘的富钾板岩中,代表晚期低温蚀变过程;钾化、萤石化及磷的异常是碳酸岩型稀土矿床最主要的浅部和外围示矿指标。

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Spatial distribution pattern of ore-forming elements in the Bayan Obo deposit and exploration implications

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来源期刊

岩石学报 Earth and Planetary Sciences-Geochemistry and Petrology

CiteScore

3.60

自引率

22.20%

发文量

5997

审稿时长

6 months

期刊介绍： Acta Petrologica Sinica is an academic journal under the supervision of the Chinese Academy of Sciences and sponsored by the Chinese Society of Mineralogy, Petrology and Geochemistry and the Institute of Geology and Geophysics of the Chinese Academy of Sciences. The journal's publishing policy is to adhere to innovation, comprehensiveness, cutting-edge and orientation, advocate diversity and multi-school, rely on and unite the vast number of geoscientists across the country, explore the mysteries of nature, carry out extensive and in-depth basic theoretical research, promote the research and development of the field of earth science in my country, publish high-level scientific research results, and cultivate and train a large number of geoscientific research talents for my country. Acta Petrologica Sinica mainly reports on various disciplines related to the basic theory of petrology, including important basic theories and applied research results in magmatic petrology, metamorphic petrology, sedimentary petrology, petrology geotectonics, rock isotope chronology and isotope geochemistry, rock mineralization, and rock-forming mineralogy. At the same time, the journal also publishes review articles, problem discussions, academic trends and book reviews.