Palaeoproterozoic to Mesoproterozoic Geology of North Queensland

Deep crustalseismic transectsMT ISAINLIERBB BURDEKIN BASINGCSP GRAVEYARD CK SUBPROVINCECCSP CAMEL CK SUBPROVINCETP THALANGA PROVINCECRP CAPE RIVER PROVINCEBP BARNARD PROVINCECOENINLIERYAMBOHODGKINSONINLIERBASINBPCRPGEORGETOWNINLIER TP CCSPGCSPBBCRPTPDRUMMONDBASININTRODUCTION• Georgetown Inlier (along with CoenInlier) contains the most easterlyProterozoic outcrops in Australia• Important to an understanding ofthe evolution of the continent andpossible configurations of Rodinia(e.g. SWEAT vs AUSWUS)• Most models for the evolution ofthe North Australian Cratonassume Georgetown to be a part ofit really explaining how it fits• Betts et al. (2002) inferred that theeastern margin of the NorthAustralian Craton was ocean-facingprior to the Mesoproterozoic(~1600-1500Ma) orogenesis, whichthey postulated was related to awest dipping subduction zone andcontinental collision due to dockingof the North American Craton at~1540Ma during formation ofRodinia.• Boger & Hansen (2004) speculatedthat the metamorphic evolution ofGeorgetown and some othercharacteristics suggest it wasaccreted to the NAC during theconstruction of Rodinia, rather thanhaving always been part of it.