The geological evolution of the Norseman Area, Western Australia

TL;DRAbstract

Norseman lies 200 km south of Kalgoorlie within the most southern part of the late Archaean Eastern Goldfields Province of Western Australia. This study resolves the stratigraphy and structure of the upper Norseman Terrane and proposes tectonic models to explain the formation of the terrane and differences with the adjacent Kalgoorlie Terrane. Problems with the current understanding of the lower stratigraphy of the Norseman Terrane were identified, but not fully resolved. Geological mapping at 1:2500-scale of the upper part of the Norseman Terrane at the Polar Bear Peninsula; revealed five Archaean facies associations: ‚Äö Mafic volcanic rocks and dolerite intrusives; ‚Äö Ultramafic rocks; ‚Äö Mafic conglomerate and sandstone; ‚Äö Fine-grained sedimentary units, dominantly pyritic black shales and thin-bedded, siltstone-shale turbidites; and ‚Äö Rhyolite lavas and both in situ and resedimented breccias. The stratigraphy and geometry of the map patterns, when combined with age dating fr

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