Overview of Results from the Greenstone ... - Geology Ontario

Appendix 1. Thermal Ionization Mass Spectrometry (TIMS) Methodology, Results and Data......................... 109
Appendix 2. Sensitive High-Resolution Ion Microprobe (SHRIMP) Methodology and Data ........................... 136
Metric Conversion Table ..................................................................................................................................... 146
FIGURES
1. Assemblage map for the Ontario portion of the Abitibi greenstone belt with location of the study area,
subproject areas and stratigraphic locations discussed in the text............................................................... 2
2. Distribution of lithotectonic assemblages, intrusions, major structures and U/Pb ages in the
Timmins to Kirkland Lake study area...........................................................................................
back pocket
3. U/Pb concordia plots of TIMS results from the Kamiskotia area ............................................................... 7
4. U/Pb concordia plots of TIMS results from the Kamiskotia and Timmins areas........................................ 8
5. U/Pb concordia plot of TIMS results from the Timmins area..................................................................... 9
6. U/Pb concordia plot of TIMS results from the Timmins and Shaw Dome areas ........................................ 10
7. U/Pb concordia plots of TIMS results from Bartlett, Teck, Gauthier and Clifford townships.................... 11
8. U/Pb concordia plots of TIMS results from Ben Nevis, Lamplugh and Munro townships ........................ 12
9. U/Pb SHRIMP results from “Keewatin” assemblage volcanic samples from the
A) Shining Tree, B) Langmuir Township and C) Cleaver Township areas ................................................ 13
10. U/Pb SHRIMP results from the Timiskaming volcanic rocks and intrusions in the study area (A and C)
and the Swayze greenstone belt (B) ............................................................................................................ 14
11. U/Pb SHRIMP results from Porcupine assemblage sedimentary rocks in the Timmins area ..................... 15
12. U/Pb SHRIMP results from Timiskaming assemblage sedimentary rocks in the Timmins area ................ 16
13. Schematic stratigraphic section of the Deloro–Tisdale assemblage contact in northern English township 25
14. Backscattered electron images of the cores of inherited zircon and a zircon overgrowth from lower
Tisdale assemblage volcanic sample 96TB-079 ......................................................................................... 28
15. Cathodoluminescence images of inherited and magmatic zircon from upper Tisdale assemblage volcanic
sample 98JAA-0011.................................................................................................................................... 30
16. Backscattered electron and cathodoluminescence images of the cores of inherited zircon and a zircon
overgrowth from Timiskaming assemblage volcanic sample 3D-CG......................................................... 35
17. Backscattered electron images of the cores of inherited zircon and a zircon overgrowth from
Timiskaming assemblage volcanic sample 99JAA-0057............................................................................ 36
18. Backscattered electron and cathodoluminescence images of zircons from syenite porphyry sample
03JAA-0006................................................................................................................................................ 41
19. Gravity worms with assemblage and structural map of the study area......................................... back pocket
20. Geological sketch map of the Kamiskotia area, with locations of known VMS deposits and
samples used for U/Pb geochronology........................................................................................................ 48
21. Schematic diagrams of a) the Ben Nevis–Clifford stratovolcano and the Noranda cauldron,
b) the Ben Nevis–Clifford stratovolcano, and c) the Noranda cauldron ..................................................... 53
22. Geological map of Munro Township .......................................................................................................... 54
23. Map of the North Munro block showing the repetition of Fred’s and Theo’s flows...................................... 56
24. Geological map of Currie Township showing mineral occurrences ........................................................... 58
ix