Petrology and geochemistry of late-stage intrusions of the A-type, mid-Proterozoic Pikes Peak batholith (Central Colorado, USA): Implications for petrogenetic models - Smith, D. R.; Noblett, J.; Wobus, R.; Unruh, D.; Douglass, J.; Beane, R.; Davis, C.; Goldman, S.; Kay, G.; Gustavson, B.; Saltoun, B.; Stewart, J. (Precambrian Research, 1999)