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.
","abstract_html":"<p>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.</p>","abstract_has_math":false,"creators":["Ardila, Ana Maria Martinez"],"institution":null,"degree_name":"Doctor of Philosophy (PhD)","degree_level":"Dissertation","degree_discipline":"Basic Sciences","degree_department":null,"school":null,"contributors":["Clausen, Benjamin L.","Nalin, Ronald","Nick, Kevin E.","Paterson, Scott","Perry, Christopher C."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016-09-01T07:00:00Z","date_published":"2016-09-01T07:00:00Z","updated_at":"2026-07-24T02:52:38Z","subjects":["Earth Sciences","Geochemistry","Geology","Physical Sciences and Mathematics","Geology - Structural -- Peru; Intrusions (Geology) -- Peru -- Ica Region; Batholiths -- Peru -- Ica Region; Magmatism -- Peru -- Ica Region; Island Arcs -- Peru -- Ica Region; Geochemical Modeling","Granitic Plutons; Crustal Recycling; Magma Mixing; Mantal and Crustal Magma; Crystallization; Elemental and Isotope Geochemistry"],"languages":["English"],"rights":["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."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarsrepository.llu.edu/etd/389","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Clausen, Benjamin L.","Nalin, Ronald","Nick, Kevin E.","Paterson, Scott","Perry, Christopher C."]},{"key":"dc:creator","label":"Author","values":["Ardila, Ana Maria Martinez"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Basic Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy (PhD)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Earth Sciences","Geochemistry","Geology","Physical Sciences and Mathematics","Geology - Structural -- Peru; Intrusions (Geology) -- Peru -- Ica Region; Batholiths -- Peru -- Ica Region; Magmatism -- Peru -- Ica Region; Island Arcs -- Peru -- Ica Region; Geochemical Modeling","Granitic Plutons; Crustal Recycling; Magma Mixing; Mantal and Crustal Magma; Crystallization; Elemental and Isotope Geochemistry"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["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."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarsrepository.llu.edu/etd/389"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["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.
"]},{"key":"dc:title","label":"Title","values":["Compositional Diversity in Arcs: A Record of Magmatic Processes in the Peru Coastal Batholith, Ica"]}]}],"canonical_facts":{"dc:contributor":["Clausen, Benjamin L.","Nalin, Ronald","Nick, Kevin E.","Paterson, Scott","Perry, Christopher C."],"dc:creator":["Ardila, Ana Maria Martinez"],"dc:description.abstract":["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.
"],"dc:identifier":["https://scholarsrepository.llu.edu/etd/389"],"dc:language":["English"],"dc:rights":["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."],"dc:subject":["Earth Sciences","Geochemistry","Geology","Physical Sciences and Mathematics","Geology - Structural -- Peru; Intrusions (Geology) -- Peru -- Ica Region; Batholiths -- Peru -- Ica Region; Magmatism -- Peru -- Ica Region; Island Arcs -- Peru -- Ica Region; Geochemical Modeling","Granitic Plutons; Crustal Recycling; Magma Mixing; Mantal and Crustal Magma; Crystallization; Elemental and Isotope Geochemistry"],"dc:title":["Compositional Diversity in Arcs: A Record of Magmatic Processes in the Peru Coastal Batholith, Ica"],"thesis:degree_discipline":["Basic Sciences"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Doctor of Philosophy (PhD)"]},"updated_at":"2026-07-24T02:52:38Z"}