Terrestrial and marine geology of the Gladstone area, Queensland

TL;DRAbstract

Structural analysis of the Palaeozoic Neranleigh-Fernvale Group and its relationship to the Precambrian Barnard Metamorphics in the Port Curtis District has led to a revision of age determination for the Barnard Metamorphics and to a re-appraisal of Palaeozoic styles of diastrophism thought characteristic of Tasman Geosynclinal orogenesis. Structural and lithological evidence suggests that the Barnard Metamorphic rocks are thermally metamorphosed age equivalents of the Rocksberg Greenstone – Bunya Phyllite sequence of the Moreton District. Regional change in trends of Palaeozoic tectonic “grain”, which occurs in the Gladstone region is effected by regional cratonic response to epi-Permian orogeny and is caused more specifically by large scale underthrust phenomena associated with peripheral expansion of deep syntectonic intrusive granites with concomitant disruption, thermal metamorphism and lateral underthrusting of Precambrian basement high(s). Late Mesozoic initiation of extensive b

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