Banded Iron Formation and Related Great Oxidation Event

• 责任者：Zhao Zhenhua (Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China)
• 刊名：Earth Science Frontiers
• 出版年：2010
• 卷期：17(2)
• 关键词：铁矿 ; iron ores ; 氧化作用 ; oxidation
• 页码：p.1-12
• 图表：8 illus., 1 table, 42 refs.
• 分类号：1001
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

Great Oxidation Event (GOE) is the appearance and continuous increase of oxygen in atmosphere about 2.4 Ga ago. The investigations on microorganism, S and C isotope fractionation, REE and changes of transition metals Ni, Fe, Mo contents have produced many new results for building new and different models of the timing and generation mechanism of GOE. The appearance of free O₂ in the atmosphere is at least advanced to 2.5 Ga.  The BIF especially the REE-Fe formation are widely developed in China. Preliminary researches on the REE geochemistry of BIF have shown that the REE contents and fractionation (La/Yb), particular the enrichment or depletion of Eu have had systematic change with time.