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Mountain Building Across A Lithospheric Boundary During Arc Construction: The Cretaceous Peninsular Ranges Batholith In The Sierra San Pedro Martir Of Baja California, Mexico, K Schmidt, S Paterson, Ann Blythe, C Kopf
Mountain Building Across A Lithospheric Boundary During Arc Construction: The Cretaceous Peninsular Ranges Batholith In The Sierra San Pedro Martir Of Baja California, Mexico, K Schmidt, S Paterson, Ann Blythe, C Kopf
Ann Blythe
The Jura-Cretaceous Peninsular Ranges batholith (PRB) of Southern and Baja California contains a remarkable example of variation in crustal composition and structure across a batholith-parallel lithospheric-scale discontinuity. This lithospheric boundary between western oceanic-floored and eastern continental-floored crust influenced contractional deformation, arc magmatism, and differential exhumation of western and eastern zones in the batholith during its evolution. In the Sierra San Pedro Martir of Baja California, Mexico, a ca. 20 km wide, doubly vergent fan structure occurs across the PRB basement transition that consists of inward-dipping mylonite thrust sheets on the sides of the fan that gradually transition to a steeply-dipping …