Peruvian granitic plutons display evidence for crustal recycling and magma mixing. Evidence of physical and chemical processes operating during the formation of the Ica-Pisco complexes involves magma mixing and mingling as result of felsic and mafic interactions. Evidence of crustal recycling was identified from kilometer-scale cauldron subsidence, meter and centimeter-scale -stoping, and disaggregation. At the petrographic microscope scale, evidence for recycling and mixing between mantle and crustal magma during crystallization is found from disequilibrium features such as reaction rims, resorbed cores, and patchy zoning. Elemental and isotope geochemistry data indicate that mantle magmas have incorporated continental crust material from varying depths and sources and in increasing amounts with time. Some uranium and lead isotope single-crystal zircon analyses also indicate varying source components. The research concluded that the source of the granitic magmas making up the plutons near Ica, Peru is about half from the mantle and half from recycled crust made up of Precambrian lower crust and Phanerozoic upper crust consisting of volcanic, sedimentary, and earlier plutonic units at the emplacement level.
School of Medicine
Clausen, Benjamin L.
Nick, Kevin E.
Perry, Christopher C.
Doctor of Philosophy (PhD)
Year Degree Awarded
Date (Title Page)
Library of Congress/MESH Subject Headings
Geology - Structural -- Peru; Intrusions (Geology) -- Peru -- Ica Region; Batholiths -- Peru -- Ica Region; Magmatism -- Peru -- Ica Region; Island Arcs -- Peru -- Ica Region; Geochemical Modeling
Subject - Local
Granitic Plutons; Crustal Recycling; Magma Mixing; Mantal and Crustal Magma; Crystallization; Elemental and Isotope Geochemistry
Loma Linda University Libraries
This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.
Ardila, Ana Maria Martinez, "Compositional Diversity in Arcs: A Record of Magmatic Processes in the Peru Coastal Batholith, Ica" (2016). Loma Linda University Electronic Theses, Dissertations & Projects. 389.
Loma Linda University Electronic Theses and Dissertations
Loma Linda University. Del E. Webb Memorial Library. University Archives