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- W2381682143 abstract "Based on field surveys,this work has made analyses of petrography and major and trace elements of low-and high-grade ores in the Sijiaying iron deposit in eastern Hebei. High-grade ore beds were produced in low-grade ore bodies. The particle of high-grade ore is coarser than the low-grade ore,which is mainly composed of magnetite and grunerite. Some grunerites are altered to chlorite,indicating that high-grade ore is related to later hydrothermal activity. Major elements of different ores of Sijiaying indicate that quartz content of high-grade ore is less than low-grade ore,whereas mafic minerals are more than low-grade ore. The values of MnO /TFe2O3 are extremely low( 0. 001 ~ 0. 01,mean = 0. 002),indicating the hydrothermal sedimentary ore genesis. The trace elements and REEs distribution patterns of the high-and low-grade ore are identical,indicating that they might come from the same sources. High-grade ores and hematite-bearing low-grade ores show higher ∑REE + Y content and gentler REE patterns than magnetite-bearing low-grade ores. The geochemical characters of hematite-bearing low-grade ores are caused by leaching at surface in the late time. The geochemical characters of highgrade ores can be attributed to excellent absorption capacity for REEs of iron-bearing sedimentary as well as metamorphic hydrothermal alteration in the later period." @default.
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- W2381682143 date "2014-01-01" @default.
- W2381682143 modified "2023-09-23" @default.
- W2381682143 title "Metallogenic Conditions of High-grade Ores in the Sijiaying Sedimentary Metamorphic Iron Deposit,Eastern Hebei Province" @default.
- W2381682143 hasPublicationYear "2014" @default.
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