Quantifying crustal thickness over time in magmatic arcs

Lucia Profeta; Mihai N. Ducea; James B. Chapman; Scott R. Paterson; Susana Marisol Henriquez Gonzales; Moritz Kirsch; LUCIAN PETRESCU; Peter G. DeCelles

doi:10.1038/srep17786

journal article Open Access Dec 03, 2015

Quantifying crustal thickness over time in magmatic arcs

Lucia Profeta Mihai N. Ducea James B. Chapman

Scott R. Paterson Susana Marisol Henriquez Gonzales Moritz Kirsch

LUCIAN PETRESCU Peter G. DeCelles

Scientific Reports Vol. 5 No. 1 · Springer Science and Business Media LLC

View at Publisher Save 10.1038/srep17786

Abstract

AbstractWe present global and regional correlations between whole-rock values of Sr/Y and La/Yb and crustal thickness for intermediate rocks from modern subduction-related magmatic arcs formed around the Pacific. These correlations bolster earlier ideas that various geochemical parameters can be used to track changes of crustal thickness through time in ancient subduction systems. Inferred crustal thicknesses using our proposed empirical fits are consistent with independent geologic constraints for the Cenozoic evolution of the central Andes, as well as various Mesozoic magmatic arc segments currently exposed in the Coast Mountains, British Columbia and the Sierra Nevada and Mojave-Transverse Range regions of California. We propose that these geochemical parameters can be used, when averaged over the typical lifetimes and spatial footprints of composite volcanoes and their intrusive equivalents to infer crustal thickness changes over time in ancient orogens.

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Details

Published: Dec 03, 2015
Vol/Issue: 5(1)
License: View

Authors

Department of Geosciences, University of Arizona, Tucson, Arizona 85721;; Faculty of Geology and Geophysics, University of Bucharest, 010041 Bucharest, Romania

2Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA

S

Susana Marisol Henriquez Gonzales

M

Moritz Kirsch

Centro de Geosciencias (CGEO), Universidad Nacional Autónoma de México (UNAM), Campus Juriquilla, Blvd Juriquilla 3001, 76230, Querétaro, México.

Cite This Article

Lucia Profeta, Mihai N. Ducea, James B. Chapman, et al. (2015). Quantifying crustal thickness over time in magmatic arcs. Scientific Reports, 5(1). https://doi.org/10.1038/srep17786

Quantifying crustal thickness over time in magmatic arcs

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