Reconstruction of the physical volcanological processes and petrogenesis of the 3.5Ga Warrawoona Group pillow basalt of the Warralong Greenstone Belt, Pilbara Craton Western Australia

Paleoarchean variole-bearing metabasalts from the East Pilbara Terrane formed by hydrous fluid phase exsolution and implications for Archean greenstone belt magmatic processes

“…(b) Geological map of the Coongan Subgroup in the eastern Warralong greenstone belt highlighting the outcropping Mount Ada Basalt and the location of studied samples (red stars), modified after (Spring, 2017).…”

“…Varioles are rare in pillow margins and abundant in pillow interiors, where they show an increase in size and are often amalgamated (Figure 2). For most pillows the volume of varioles constitutes between 10% and 20% (Spring, 2017).…”