Overview of Results from the Greenstone ... - Geology Ontario
Overview of Results from the Greenstone ... - Geology Ontario
Overview of Results from the Greenstone ... - Geology Ontario
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Contents<br />
Abstract ...............................................................................................................................................................<br />
Introduction ......................................................................................................................................................... 1<br />
Approach..................................................................................................................................................... 1<br />
Products ...................................................................................................................................................... 3<br />
Geological Setting....................................................................................................................................... 4<br />
Geochronology .................................................................................................................................................... 5<br />
Thermal Ionization Mass Spectrometry (TIMS) <strong>Results</strong> ............................................................................ 5<br />
Sensitive High-Resolution Ion Microprobe (SHRIMP) <strong>Results</strong> ................................................................. 5<br />
Stratigraphic Framework ..................................................................................................................................... 20<br />
Assemblage Contact Relationships and <strong>the</strong> Significance <strong>of</strong> Iron Formation Conglomerate and<br />
Chert Breccia Units..................................................................................................................................... 20<br />
Pacaud Assemblage..................................................................................................................................... 22<br />
Deloro Assemblage..................................................................................................................................... 22<br />
Stoughton–Roquemaure Assemblage ......................................................................................................... 26<br />
Kidd–Munro Assemblage ........................................................................................................................... 26<br />
Lower Part .......................................................................................................................................... 26<br />
Upper Part .......................................................................................................................................... 27<br />
Tisdale Assemblage .................................................................................................................................... 27<br />
Lower Part .......................................................................................................................................... 27<br />
Upper Part .......................................................................................................................................... 29<br />
Blake River Assemblage............................................................................................................................. 30<br />
Lower Part .......................................................................................................................................... 30<br />
Upper Part .......................................................................................................................................... 31<br />
Porcupine Assemblage................................................................................................................................ 31<br />
Timmins Area..................................................................................................................................... 31<br />
Nor<strong>the</strong>ast Area.................................................................................................................................... 32<br />
Larder Lake South Area ..................................................................................................................... 33<br />
Timiskaming Assemblage........................................................................................................................... 33<br />
Timmins Area..................................................................................................................................... 34<br />
East <strong>of</strong> Ma<strong>the</strong>son Area ....................................................................................................................... 34<br />
Kirkland Lake–Larder Lake Area....................................................................................................... 36<br />
Matachewan Area............................................................................................................................... 37<br />
Intrusion Framework ........................................................................................................................................... 38<br />
Intermediate to Felsic Synvolcanic Intrusions ............................................................................................ 38<br />
Mafic to Ultramafic Synvolcanic Intrusions ............................................................................................... 38<br />
Syntectonic Intrusions................................................................................................................................. 40<br />
Late Tectonic Intrusions.............................................................................................................................. 42<br />
Structural Framework.......................................................................................................................................... 42<br />
Geophysical Interpretations <strong>of</strong> <strong>Greenstone</strong> Belt Architecture at Depth ...................................................... 42<br />
Reflection Seismic Interpretation ....................................................................................................... 42<br />
Potential Field Inversions................................................................................................................... 43<br />
Worming Geophysical Data Treatment and Display Technique ........................................................ 44<br />
Regional Stratigraphic and Structural Interpretation................................................................................... 44<br />
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