The Bedded Chert, banded iron‐formation problem
作者:
O. A. Jones,
期刊:
Journal of the Geological Society of Australia
(Taylor Available online 1963)
卷期:
Volume 10,
issue 1
页码: 209-222
ISSN:0016-7614
年代: 1963
DOI:10.1080/00167616308728541
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The characteristics of Bedded Cherts and Banded Iron‐Formations are summarised. As, following O'Rourke's work, the latter are considered as not confined to the Precambrian, the only significant difference between the two formations is shown to be the low iron content of Bedded Cherts. This difference it is suggested is due to Bedded Cherts having been deposited in a virtually continuously acid to weakly alkaline environment, whereas Banded Iron‐Formation was precipitated under an alternation of acid and alkaline conditions yielding siliceous and iron‐rich layers respectively. Such chemical precipitation of either Bedded Chert or Banded Iron‐Formation was in some examples of each type of formation rhythmically interrupted by the deposition of clastic sediment.
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