Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application

Abstract We present compiled geochemical data of young (mostly Pliocene-present) intermediate magmatic rocks from continental collisional belts and correlations between their whole-rock Sr/Y and La/Yb ratios and modern crustal thickness. These correlations, which are similar to those obtained from s...

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Autores principales:	Fangyang Hu, Mihai N. Ducea, Shuwen Liu, James B. Chapman
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9bdf330002b14540a8e6335c924a7a86
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spelling	oai:doaj.org-article:9bdf330002b14540a8e6335c924a7a862021-12-02T11:53:13ZQuantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application10.1038/s41598-017-07849-72045-2322https://doaj.org/article/9bdf330002b14540a8e6335c924a7a862017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07849-7https://doaj.org/toc/2045-2322Abstract We present compiled geochemical data of young (mostly Pliocene-present) intermediate magmatic rocks from continental collisional belts and correlations between their whole-rock Sr/Y and La/Yb ratios and modern crustal thickness. These correlations, which are similar to those obtained from subduction-related magmatic arcs, confirm that geochemistry can be used to track changes of crustal thickness changes in ancient collisional belts. Using these results, we investigate temporal variations of crustal thickness in the Qinling Orogenic Belt in mainland China. Our results suggest that crustal thickness remained constant in the North Qinling Belt (~45–55 km) during the Triassic to Jurassic but fluctuates in the South Qinling Belt, corresponding to independently determined tectonic changes. In the South Qinling Belt, crustal thickening began at ~240 Ma and culminated with 60–70-km-thick crust at ~215 Ma. Then crustal thickness decreased to ~45 km at ~200 Ma and remained the same to the present. We propose that coupled use of Sr/Y and La/Yb is a feasible method for reconstructing crustal thickness through time in continental collisional belts. The combination of the empirical relationship in this study with that from subduction-related arcs can provide the crustal thickness evolution of an orogen from oceanic subduction to continental collision.Fangyang HuMihai N. DuceaShuwen LiuJames B. ChapmanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fangyang Hu Mihai N. Ducea Shuwen Liu James B. Chapman Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application
description	Abstract We present compiled geochemical data of young (mostly Pliocene-present) intermediate magmatic rocks from continental collisional belts and correlations between their whole-rock Sr/Y and La/Yb ratios and modern crustal thickness. These correlations, which are similar to those obtained from subduction-related magmatic arcs, confirm that geochemistry can be used to track changes of crustal thickness changes in ancient collisional belts. Using these results, we investigate temporal variations of crustal thickness in the Qinling Orogenic Belt in mainland China. Our results suggest that crustal thickness remained constant in the North Qinling Belt (~45–55 km) during the Triassic to Jurassic but fluctuates in the South Qinling Belt, corresponding to independently determined tectonic changes. In the South Qinling Belt, crustal thickening began at ~240 Ma and culminated with 60–70-km-thick crust at ~215 Ma. Then crustal thickness decreased to ~45 km at ~200 Ma and remained the same to the present. We propose that coupled use of Sr/Y and La/Yb is a feasible method for reconstructing crustal thickness through time in continental collisional belts. The combination of the empirical relationship in this study with that from subduction-related arcs can provide the crustal thickness evolution of an orogen from oceanic subduction to continental collision.
format	article
author	Fangyang Hu Mihai N. Ducea Shuwen Liu James B. Chapman
author_facet	Fangyang Hu Mihai N. Ducea Shuwen Liu James B. Chapman
author_sort	Fangyang Hu
title	Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application
title_short	Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application
title_full	Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application
title_fullStr	Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application
title_full_unstemmed	Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application
title_sort	quantifying crustal thickness in continental collisional belts: global perspective and a geologic application
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/9bdf330002b14540a8e6335c924a7a86
work_keys_str_mv	AT fangyanghu quantifyingcrustalthicknessincontinentalcollisionalbeltsglobalperspectiveandageologicapplication AT mihainducea quantifyingcrustalthicknessincontinentalcollisionalbeltsglobalperspectiveandageologicapplication AT shuwenliu quantifyingcrustalthicknessincontinentalcollisionalbeltsglobalperspectiveandageologicapplication AT jamesbchapman quantifyingcrustalthicknessincontinentalcollisionalbeltsglobalperspectiveandageologicapplication
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Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application

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