(Article of periodic en Anglais - 1996)

Document title

Evidence of anoxic to oxic atmospheric change during 2.45-2.22 Ga from lower and upper sub-Huronian paleosols, Canada

Authors(s) and Affiliation(s)

(1) Geological Survey of canada, Ottawa, CANADA


Paleoweathered zones in 4 underground drill holes in Quirke II mine and one drill hole by Denison Mines in Elliot Lake area, Ontario, Canada were studied for petrography, mineralogy, and whole rock chemistry. The differences between the sub-Huronian paleoweathering profiles and mineralogical characteristics of the lower Huronian strata overlying the paleosols, support the previously postulated oxyatmoversion theory and restricts the time interval for its occurence to between 2.45 and 2.22 Ga. Assuming that few tens of millions of years were required for the deposition of lower Huronian Groups, oxyatmoversion likely occured at about 2.4 Ga


Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 1996, vol. 27, no2 [pp. 105-121]

Bibliographic references : 35 ref.

Collation : Illustration ;




Laboratoire INTERGEO - Paris

INIST-CNRS, Cote INIST : 16767

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 1997.
Refdoc record number (ud4) : 6286072 : Permanent link - XML version
Powered by Pxxo