Role of deep-Earth water cycling in the growth and evolution of continental crust: Constraints from Cretaceous magmatism in southeast China
The late Mesozoic igneous province in southeast China provides an excellent opportunity to understand the processes that controlled the growth and evolution of Phanerozoic continental crust. Here we report petrological, whole-rock geochemical and isotopic data, and in situ zircon U–Pb–Lu–Hf isotopic...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Elsevier BV
2018
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| Online Access: | http://purl.org/au-research/grants/arc/FT140100826 http://hdl.handle.net/20.500.11937/68207 |
| _version_ | 1848761771375984640 |
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| author | Li, Zhen Wang, Xuan-Ce Wilde, Simon Liu, L. Li, W. Yang, X. |
| author_facet | Li, Zhen Wang, Xuan-Ce Wilde, Simon Liu, L. Li, W. Yang, X. |
| author_sort | Li, Zhen |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The late Mesozoic igneous province in southeast China provides an excellent opportunity to understand the processes that controlled the growth and evolution of Phanerozoic continental crust. Here we report petrological, whole-rock geochemical and isotopic data, and in situ zircon U–Pb–Lu–Hf isotopic data from granitoids and associated gabbros in the Pingtan and Tong'an complexes, southeast China. Through combining the new results with published datasets in southeast China, we show that the Early Cretaceous magmatic rocks are dominated by juvenile Nd–Hf isotopic compositions, whereas the Late Cretaceous ones display less radiogenic Nd–Hf isotope signatures. Furthermore, Nd–Hf isotope systematics are coupled with decreasing abundance of hydrous minerals and an increase of zircon saturation temperatures. Compiled zircon Hf–O data indicates that the 117–116 Ma granites have zircon δ18O values ranging from mantle values (close to 5.3‰) to as low as 3.9‰, but with dominantly positive initial epsilon Hf (εHf(t)) values. Zircon grains from 105 to 98 Ma rocks have δ18O values plotting within the mantle-like range (6.5‰ − 4.5‰), but mainly with negative εHf(t) values. Zircon grains from ca. 87 Ma rocks have positive εHf(t) values (+ 9.8 to + 0.7) and a large range of δ18O values (6.3‰ − 3.5‰). The variations in Hf–Nd–O isotopic compositions are correlated with decreasing abundance of magma water contents, presenting a case that water-fluxed melting generated large-scale granitic magmatism. Deep-Earth water cycling provides an alternative or additional mechanism to supply volatiles (e.g., H2O) for hydrous basaltic underplating, continental crustal melting, and magmatic differentiation. |
| first_indexed | 2025-11-14T10:36:58Z |
| format | Journal Article |
| id | curtin-20.500.11937-68207 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:36:58Z |
| publishDate | 2018 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-682072023-06-06T05:16:41Z Role of deep-Earth water cycling in the growth and evolution of continental crust: Constraints from Cretaceous magmatism in southeast China Li, Zhen Wang, Xuan-Ce Wilde, Simon Liu, L. Li, W. Yang, X. The late Mesozoic igneous province in southeast China provides an excellent opportunity to understand the processes that controlled the growth and evolution of Phanerozoic continental crust. Here we report petrological, whole-rock geochemical and isotopic data, and in situ zircon U–Pb–Lu–Hf isotopic data from granitoids and associated gabbros in the Pingtan and Tong'an complexes, southeast China. Through combining the new results with published datasets in southeast China, we show that the Early Cretaceous magmatic rocks are dominated by juvenile Nd–Hf isotopic compositions, whereas the Late Cretaceous ones display less radiogenic Nd–Hf isotope signatures. Furthermore, Nd–Hf isotope systematics are coupled with decreasing abundance of hydrous minerals and an increase of zircon saturation temperatures. Compiled zircon Hf–O data indicates that the 117–116 Ma granites have zircon δ18O values ranging from mantle values (close to 5.3‰) to as low as 3.9‰, but with dominantly positive initial epsilon Hf (εHf(t)) values. Zircon grains from 105 to 98 Ma rocks have δ18O values plotting within the mantle-like range (6.5‰ − 4.5‰), but mainly with negative εHf(t) values. Zircon grains from ca. 87 Ma rocks have positive εHf(t) values (+ 9.8 to + 0.7) and a large range of δ18O values (6.3‰ − 3.5‰). The variations in Hf–Nd–O isotopic compositions are correlated with decreasing abundance of magma water contents, presenting a case that water-fluxed melting generated large-scale granitic magmatism. Deep-Earth water cycling provides an alternative or additional mechanism to supply volatiles (e.g., H2O) for hydrous basaltic underplating, continental crustal melting, and magmatic differentiation. 2018 Journal Article http://hdl.handle.net/20.500.11937/68207 10.1016/j.lithos.2017.12.028 http://purl.org/au-research/grants/arc/FT140100826 Elsevier BV fulltext |
| spellingShingle | Li, Zhen Wang, Xuan-Ce Wilde, Simon Liu, L. Li, W. Yang, X. Role of deep-Earth water cycling in the growth and evolution of continental crust: Constraints from Cretaceous magmatism in southeast China |
| title | Role of deep-Earth water cycling in the growth and evolution of continental crust: Constraints from Cretaceous magmatism in southeast China |
| title_full | Role of deep-Earth water cycling in the growth and evolution of continental crust: Constraints from Cretaceous magmatism in southeast China |
| title_fullStr | Role of deep-Earth water cycling in the growth and evolution of continental crust: Constraints from Cretaceous magmatism in southeast China |
| title_full_unstemmed | Role of deep-Earth water cycling in the growth and evolution of continental crust: Constraints from Cretaceous magmatism in southeast China |
| title_short | Role of deep-Earth water cycling in the growth and evolution of continental crust: Constraints from Cretaceous magmatism in southeast China |
| title_sort | role of deep-earth water cycling in the growth and evolution of continental crust: constraints from cretaceous magmatism in southeast china |
| url | http://purl.org/au-research/grants/arc/FT140100826 http://hdl.handle.net/20.500.11937/68207 |