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Mesozoic tectonic evolution of the southern Peninsular Ranges Batholith, Baja California, Mexico; long-lived history of a collisional segment in the Mesozoic Cordilleran Arc

K. L. Schmidt, Paul H. Wetmore, H. Alsleben and S. R. Paterson
Mesozoic tectonic evolution of the southern Peninsular Ranges Batholith, Baja California, Mexico; long-lived history of a collisional segment in the Mesozoic Cordilleran Arc (in Peninsular Ranges Batholith, Baja California and Southern California, Douglas M. Morton (editor) and Fred K. Miller (editor))
Memoir - Geological Society of America (January 2014) 211: 645-668

Abstract

The Mesozoic Peninsular Ranges batholith, part of a long-lived Cordilleran subduction orogen, is located at a critical juncture at the southwest corner of cratonal North America. The batholith is divided into northern and southern segments that differ in their evolution. In this paper, we focus on the more poorly understood southern Peninsular Ranges batholith, south of the Agua Blanca fault at approximately 31.5 degrees N latitude, and we compare its evolution with the better-known northern Peninsular Ranges batholith. Adding our new insights to previous work, our present understanding of the geologic history of the Peninsular Ranges consists of the following: (1) stronger connections between the Paleozoic passive-margin rocks in the eastern Peninsular Ranges batholith and similar assemblages in Sonora, Mexico, to the east and the Sierra Nevada batholith to the north that were originally proposed by earlier workers; (2) continuity of the Triassic-Jurassic accretionary prism and forearc basin assemblage from the northern Peninsular Ranges batholith through the southern Peninsular Ranges batholith; (3) possible synchronous subduction of an ocean ridge or ridge transform along the Peninsular Ranges batholith in late Middle Jurassic time; (4) continuity of the Early Cretaceous Santiago Peak continental arc from the northern Peninsular Ranges batholith along the entire margin, including the southern Peninsular Ranges batholith; (5) development of the Alisitos oceanic arc in Jurassic and possibly Triassic time, much earlier than originally thought; and (6) removal of part of the Santiago Peak assemblage in the southern Peninsular Ranges batholith during collision of the Alisitos terrane in latest Early Cretaceous time.


ISSN: 0072-1069
Coden: GSAMAQ
Serial Title: Memoir - Geological Society of America
Serial Volume: 211
Title: Mesozoic tectonic evolution of the southern Peninsular Ranges Batholith, Baja California, Mexico; long-lived history of a collisional segment in the Mesozoic Cordilleran Arc
Title: Peninsular Ranges Batholith, Baja California and Southern California
Author(s): Schmidt, K. L.Wetmore, Paul H.Alsleben, H.Paterson, S. R.
Author(s): Morton, Douglas M.editor
Author(s): Miller, Fred K.editor
Affiliation: Lewis-Clark State College, Division of Natural Sciences, Lewiston, ID, United States
Affiliation: U. S. Geological Survey, Riverside, CA, United States
Pages: 645-668
Published: 201401
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 148
Accession Number: 2014-024240
Categories: Structural geologyIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., 1 table, geol. sketch map
N29°00'00" - N32°00'00", W117°00'00" - W114°00'00"
Secondary Affiliation: University of South Florida, USA, United StatesTexas Christian University, USA, United StatesUniversity of Southern California, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201415
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