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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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