Rare Earths, Niobium and Tantalum Minerals in Bayan Obo Ore Deposit and Discussion on Their Genesis
来源期刊：JOURNAL OF RARE EARTHS2002年第2期
论文作者：张培善 宋仁奎 陶克捷 杨学明 杨主明
Key words：rare earths; niobium and tantalum; mineral genesis; Bayan Obo;
Abstract: Bayan Obo ore deposit is endowed with and lie hidden in the Proterozoic strata. The localities and occurrences of the minerals in the ore deposit were described. It is obviously that some minerals are strata minerals and some are post-strata minerals. The rare earths, niobium and tantalum minerals are exactly the post-strata minerals. In these minerals the hydrothermal metasomatic phenomena distinctly reveal their metallogenic characteristics. According to tectonic movement, magma activity, mineral paragenesis, hydrothermal metasomatism, geological age and lasting time-scale of metallogenesis, and some other factors, it is supposed that genesis of rare-earths, niobium and tantalum minerals in Bayan Obo ore deposit are closely related with hydrothermal metallogenic solution which is differentiated from silica acid and carbonic acid magma and derived from deep seated source, and then intruded into Proterozoic strata and metasomatized. It is recognized that the metallogenesis of Bayan Obo ore deposit is undergoing a long geological period and many episodes.
张培善1，宋仁奎1，陶克捷1，杨学明1，杨主明1
(1.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China)
Abstract:Bayan Obo ore deposit is endowed with and lie hidden in the Proterozoic strata. The localities and occurrences of the minerals in the ore deposit were described. It is obviously that some minerals are strata minerals and some are post-strata minerals. The rare earths, niobium and tantalum minerals are exactly the post-strata minerals. In these minerals the hydrothermal metasomatic phenomena distinctly reveal their metallogenic characteristics. According to tectonic movement, magma activity, mineral paragenesis, hydrothermal metasomatism, geological age and lasting time-scale of metallogenesis, and some other factors, it is supposed that genesis of rare-earths, niobium and tantalum minerals in Bayan Obo ore deposit are closely related with hydrothermal metallogenic solution which is differentiated from silica acid and carbonic acid magma and derived from deep seated source, and then intruded into Proterozoic strata and metasomatized. It is recognized that the metallogenesis of Bayan Obo ore deposit is undergoing a long geological period and many episodes.
Key words:rare earths; niobium and tantalum; mineral genesis; Bayan Obo;
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