Palaeoproterozoic to Mesoproterozoic Geology of North Queensland

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Einasleigh Metamorphics• Psammopelitic gneisses (biotite & calc-silicate types); common mafics; rareleucogneiss (feldspathic psammite?)• Previously correlated with lower part of Etheridge Group – gradationalboundary - may be partly true, but geochemistry and zircons suggestprovenance differences• Upper amphibolite to transitional granulite metamorphism• Age constraints‣ 1700Ma SHRIMP on detrital zircons in leucogneiss (epiclastic sedimentsfrom a felsic igneous source – Black & others, 2005)‣ ~1690Ma SHRIMP on zircons from trondhjemitic gneissic granite‣ ~1675Ma SHRIMP on zircons from amphibolite intruding 1695Ma granitegneiss‣ Detrital ages of both biotite and calc-silicate paragneisses, have beenobtained, but need more interpretation - spread of ages between ~1670 and3240 Ma, with no big groups – some clusters between 1700 and 1900 Ma and2300 and 2600
Proterozoic solid geology – Georgetown region, showing granitoidsForsayth Forsayth Batholith BatholithMigmatitic granitoidEsmeralda Esmeralda SupersuiteSupersuiteForest HomeTrondhjemite
Page 1 and 2: Australian GovernmentGeoscience Aus
Page 3 and 4: Tasman LineCOENINLIERDeep crustalse
Page 5 and 6: 50 kmSurface Geology - Georgetown r
Page 7 and 8: Proterozoic Stratigraphic Units - S
Page 9 and 10: Bernecker Creek Formation• Calcar
Page 11 and 12: Daniel Creek Formation• Very fine
Page 13 and 14: Dead Horse Metabasalt• Aphyric th
Page 15 and 16: Corbett Formation• Predominantly
Page 17 and 18: Lane Creek Formation• Mudstone an
Page 19 and 20: Cobbold Metadolerite• Mostly sill
Page 21 and 22: Cobbold Metadolerite• Mostly sill
Page 23 and 24: Townley Formation• Mudstone, silt
Page 25 and 26: Heliman Formation• Mudstone and s
Page 27 and 28: Langdon River Mudstone• Laminated
Page 31 and 32: Langlovale Group• Malacura Sandst
Page 33 and 34: Palaeoproterozoic-Mesoproterozoic S
Page 35 and 36: Croydon Volcanic Group• Dominated
Page 37 and 38: Inorunie Group• Unconformably ove
Page 41 and 42: Einasleigh Metamorphics• Psammope
Page 43: Einasleigh Metamorphics• Psammope
Page 47 and 48: Proterozoic structural domains & so
Page 49 and 50: Robertson River areaDeformation & m
Page 51 and 52: Deformation & metamorphismLangloval
Page 53 and 54: Palaeoproterozoic-Mesoproterozoic S
Page 55 and 56: Other Proterozoic Inliers - norther
Page 57 and 58: Tasman LineCOENINLIEROther Proteroz
Page 59 and 60: Other Proterozoic Inliers - Yambo
Page 61 and 62: Other Proterozoic Inliers - Coen•
Page 63 and 64: Correlations between InliersEtherid
Page 65 and 66: Correlating Georgetown and Mt Isa S
Page 67: Correlating Georgetown and Mt Isa S

Palaeoproterozoic to Mesoproterozoic Geology of North Queensland

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