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| | 498 |
 | | The Algome-type BIFs occur mostly near the Archean-Proterozoic boundary. |
 | | In Europe, the largest deposits of this type are located in the Ukrainian Shield (Novopavlovsk complex, over 3400 Ma, Kosivtsevskaya formation of the Near-Azov region, over 3310 Ma, Konsko-Verkhovtsevskaya BIF, 3175-3150 Ma; Shcherbak et al., 1990), and on the Baltic Shield (Kola BIF, Olenegorsk, 2800-2750 Ma, original data; Kostomuksha, 2800-2760 Ma; Bibikova, 1989). |
 | | Most researchers interpret the Algoma-type BIFs to be sedimentary or volcanic-sedimentary formations, however (in contrast to the undoubtedly sedimentary BIFs of the Superior-type) this interpretation is more often than not based on insufficient factual evidence. |
| www.the-conference.com /JConfAbs/4/498.html (7510 words) |
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