Mill Creek and Owens Mountain intrusive suite
Mill Creek and Owens Mountain intrusive suite
Late to Middle Jurassic, ~148-170 Ma
Crops out on the western slopes of the southwestern Sierra Nevada. Major plutons: (1) Mill Creek complex consisting of penetratively-deformed lenticular gabbro, diorite, and tonalite plutons that intrude the eastern part of the Kings River ophiolite belt (unit MRKI). This part of the unit has yielded zircon U-Pb ages of ~157-170 Ma (Saleeby and Sharp, 1980; Saleeby and Dunne, 2015). Saleeby (2011) states the age of this unit is 156-170 Ma.; and (2) Owens Mountain complex consisting of penetratively-deformed basaltic, gabbroic, dioritic, and trondhjemitic dikes and small lenticular stocks that intrude as screens into the western Kings River ophiolite. This part of the unit has zircon U-Pb ages ~148-155 Ma (Wolf and Saleeby, 1992). Both complexes intruded by the mildly to non-deformed plutons of Early Cretaceous Fine Gold intrusive suite (unit Gfg).