Early Tertiary to Late Cretaceous muscovite-bearing granitic rocks

Light-colored peraluminous muscovite granite with or without garnet; commonly forms sills and is associated with abundant pegmatite dikes and sills. This unit includes granites in the Harcuvar and Harquahala Mountains of western Arizona and in the Santa Catalina, Rincon, Tortolita, Picacho, and Coyote Mountains of south-central Arizona. These granites typically represent the youngest phase of voluminous magmatism during the Laramide orogeny in Arizona. This unit also includes several muscovite-bearing granites in southern Arizona that are associated with calc-alkaline granites of unit TKg, and a batholith in the Cabeza Prieta area of southwestern Arizona. (50-80 Ma)
State Arizona
Name Early Tertiary to Late Cretaceous muscovite-bearing granitic rocks
Geologic age Late Cretaceous to Early Tertiary
Lithologic constituents
Igneous > Plutonic > Granitic > Granite (Pluton, Stock or pipe, Dike or sill, Batholith)peraluminous
Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite (Dike or sill)peraluminous
Comments Laramide peraluminous
Stratigraphic units Wilderness Granite, Pan Tak Granite

Richard, S.M., Reynolds, S.J., Spencer, J.E., and Pearthree, P.A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.

Blakey, R.C., 1989, Triassic and Jurassic geology of the southern Colorado Plateau, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Geological Society Digest 17, p. 369-396.

NGMDB product
Counties Cochise - La Paz - Maricopa - Pima - Pinal - Yavapai - Yuma