Petrography and geochemistry of early Proterozoic granitoid rocks in Wisconsin magmatic terranes of Penokean Orogen, northern Wisconsin

Jl Introduction J2 Geologic setting J2 Wisconsin magmatic terranes J2 Pembine-Wausau terrane J6 Marshfield terrane J6 Granitoid rocks J6 Pembine-Wausau terrane J6 Syntectonic granodiorite suite J7 Post-tectonic suite J7 Athelstane Quartz Monzonite J7 1,835 Ma alkali-feldspar granite J9 1,760 Ma granodiorite-granite group J13 Marshfield terrane JtS Syntectonic tonalite-granodiorite suite J16 Gneissic granite near Neillsville J23 1,835 Ma alkali-feldspar granite J24 Summary and conclusions J24 References cited J27 Appendix A. Petrographic descriptions of rock samples listed in table 1 J29 Appendix B. Petrographic descriptions of rock samples listed in table 2 J30