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Peninsular Ranges Batholith, Baja California and Southern California
GSA Memoirs

Peninsular Ranges Batholith, Baja California and Southern California

Author(s)
Douglas M. Morton
Douglas M. Morton
U.S. Geological Survey and Department of Earth Sciences, University of California, Riverside, California 92521, USA
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Fred K. Miller
Fred K. Miller
U.S. Geological Survey, 904 West Riverside Ave., Spokane, Washington 99201, USA
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Author and Other Information
Copyright:
© 2014 Geological Society of America
Attribution:You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). Noncommercial ‒ you may not use this work for commercial purpose. No Derivative works ‒ You may not alter, transform, or build upon this work. Sharing ‒ Individual scientists are hereby granted permission, without fees or further requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in other subsequent works and to make unlimited photocopies of items in this journal for noncommercial use in classrooms to further education and science.
Geological Society of America
Volume
211
DOI:
https://doi.org/10.1130/MEM211
ISBN print:
9780813712116
Publication date:
January 01, 2014
Book Chapter

Santiago Peak volcanics: Early Cretaceous arc volcanism of the western Peninsular Ranges batholith, southern California

Author(s)
Charles T. Herzig
Charles T. Herzig
Department of Earth Sciences, El Camino College, Torrance, California 90506, USA
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;
David L. Kimbrough
David L. Kimbrough
Department of Geological Sciences, San Diego State University, San Diego, California 92182-1020, USA
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Doi:
https://doi.org/10.1130/2014.1211(09)
  • Published:
    January 01, 2014

The Santiago Peak volcanics, in the northern Santa Ana Mountains, are the northernmost exposures of the Santiago Peak–Alisitos magmatic arc present along the western edge of the Peninsular Ranges batholith. Remnants of deeply eroded volcanic sequences in the Santa Ana Mountains consist of subaerial basaltic-andesite to rhyolite lavas, rare basalt, welded tuff, and pyroclastic rocks that were emplaced across deformed Middle Jurassic turbidites. Subalkaline lavas have mixed calc-alkaline and tholeiitic affinities. Relatively primitive εSr (−18 to +5) and εNd (+7.5 to +0.1) values for the lavas plot along the mantle array. Silicic lavas have higher εSr and...

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