Chinese Camp igneous complex
Chinese Camp igneous complex
Early Jurassic, ~196-200 Ma
Pyroxene and hornblende diorite and gabbro, melagabbro, pyroxenite, and wehrlite. Crops out west of New Melones Lake and around Don Pedro Reservoir. This unit has zircon U-Pb ages of ~196-200 Ma (Saleeby, 1982). Intrudes the Moccasin Peak subterrane of the Cosumnes terrane (units CPTO, CPJP, and CPPB, described below). Thought to be the shallow-level feeder system for the Penon Blanco volcanics. Same as Chinese Camp-Don Pedro intrusives of Saleeby (1982), not to be confused with similarly named, but younger, unit Gdp.