Palaeoproterozoic to Mesoproterozoic Geology of North Queensland
Palaeoproterozoic to Mesoproterozoic Geology of North Queensland
Palaeoproterozoic to Mesoproterozoic Geology of North Queensland
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Deformation & metamorphismReconciling the regional analysis and SHRIMP dating with the JCU detailed studiesis difficult, but allowing for the statistics for the CHIME dates being somewhatrubbery, the following is a possibility• Possible metamorphic and deformation pre-1675Ma (post 1690Ma?) in theEinasleigh Metamorphics• D1 - N-S shortening at ~1620Ma• D2 – E-W shortening at ~1590Mamedium P-T metamorphism• Uplift and retrogressive metamorphism sometime between 1590 and 1560Ma• D3 - NW-SE shortening and low pressure-high temperature metamorphism at1560-1550Ma, associated with main metamorphic zircon growth andemplacement <strong>of</strong> Forsayth Batholith and Croydon Volcanic Group and EsmeraldaSuite• D4 – possibly 1510Ma• Subsequent Palaeozoic events
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