Geochemistry of Archaean Volcanic Belts in the Eastern Goldfields Region of Western Australia |
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| Authors: | HALLBERG J A |
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| Institution: | Division of Mineralogy, CSIRO Private Mail Bag, P.O., Wembley, Western Australia, 6014 |
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| Abstract: | Volcanic belts in the Kalgoorlie-Norseman district of the EasternGoldfields region of the Western Australian Shield are dominatedby monotonous sequences of metamorphosed tholeiitic pillow basaltsshowing little vertical or lateral variation. These meta-basaltsare chemically similar to Archaean tholeiites from Canada andSouth Africa and are characterized by their low content of K,Rb, and Sr and low Fe2O2/FeO ratios. There is little evidenceof major cyclic compositional trends within the volcanic belts,with both major and trace elements showing limited dispersion.An undifferentiated, uncontaminated source of basaltic materialwas available throughout the development of thick volcanic pilesin the region. |
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