Petrogenesis and tectonic implications of Early Cretaceous I-type granites from offshore drilling in east of the Fuzhou City, Southeast China
The Cretaceous (<115 Ma) granitoid rocks in Southeast China provide critical insights into the role of juvenile materials in their genesis, as evidenced by the presence of I- and A-type granites. This study presents comprehensive geochronological, mineralogical, geochemical, and Sr–Nd–Hf isotopic...
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Elsevier
2025-08-01
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| Series: | Geosystems and Geoenvironment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772883825000500 |
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| author | Han Yan Xi-Yao Li Xun Yuan Sanzhong Li Xin Chen Pengcheng Wang Yu Wang Jie Gao |
| author_facet | Han Yan Xi-Yao Li Xun Yuan Sanzhong Li Xin Chen Pengcheng Wang Yu Wang Jie Gao |
| author_sort | Han Yan |
| collection | DOAJ |
| description | The Cretaceous (<115 Ma) granitoid rocks in Southeast China provide critical insights into the role of juvenile materials in their genesis, as evidenced by the presence of I- and A-type granites. This study presents comprehensive geochronological, mineralogical, geochemical, and Sr–Nd–Hf isotopic data for granites collected from the offshore drilling in the western East China Sea, located east of the Fuzhou City (Fujian Province), Southeast China. Zircon, apatite, and titanite U–Pb dating reveal that the granite samples formed at 112–111 Ma. The samples exhibit geochemical characteristics typical of I-type granites, with negative whole-rock εNd(t) values (–4.4) and zircon εHf(t) values ranging from –2.8 to 0.1. These I-type granites were primarily formed through partial melting of mafic igneous protoliths, followed by magma mixing with ancient crustal materials. We propose that the SE China coast underwent a transition from a compressional to a lithospheric extensional environment during the late Early Cretaceous, driven by the slab rollback of the subducted Paleo-Pacific Plate. This lithospheric extension facilitated the underplating of mantle-derived magma, which modified the crustal source and induced melting of continental arc crustal materials. |
| format | Article |
| id | doaj-art-5538e19eb3eb410abe84f0b4f710400a |
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| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
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| series | Geosystems and Geoenvironment |
| spelling | doaj-art-5538e19eb3eb410abe84f0b4f710400a2025-08-20T02:15:20ZengElsevierGeosystems and Geoenvironment2772-88382025-08-014310040010.1016/j.geogeo.2025.100400Petrogenesis and tectonic implications of Early Cretaceous I-type granites from offshore drilling in east of the Fuzhou City, Southeast ChinaHan Yan0Xi-Yao Li1Xun Yuan2Sanzhong Li3Xin Chen4Pengcheng Wang5Yu Wang6Jie Gao7Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Submarine Geosciences and Prospecting Techniques, MOE and College of Marine Geosciences, Ocean University of China, Qingdao 266100, PR ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Submarine Geosciences and Prospecting Techniques, MOE and College of Marine Geosciences, Ocean University of China, Qingdao 266100, PR China; Laoshan Laboratory, Laboratory for Marine Mineral Resources, Qingdao Marine Science and Technology Center, Qingdao 266237, PR China; Corresponding author.Survey of Marine Geology, Fujian Institute of Geological Survey, Fuzhou 350011, PR ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Submarine Geosciences and Prospecting Techniques, MOE and College of Marine Geosciences, Ocean University of China, Qingdao 266100, PR China; Laoshan Laboratory, Laboratory for Marine Mineral Resources, Qingdao Marine Science and Technology Center, Qingdao 266237, PR ChinaSurvey of Marine Geology, Fujian Institute of Geological Survey, Fuzhou 350011, PR ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Submarine Geosciences and Prospecting Techniques, MOE and College of Marine Geosciences, Ocean University of China, Qingdao 266100, PR China; Laoshan Laboratory, Laboratory for Marine Mineral Resources, Qingdao Marine Science and Technology Center, Qingdao 266237, PR ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Submarine Geosciences and Prospecting Techniques, MOE and College of Marine Geosciences, Ocean University of China, Qingdao 266100, PR ChinaSurvey of Marine Geology, Fujian Institute of Geological Survey, Fuzhou 350011, PR ChinaThe Cretaceous (<115 Ma) granitoid rocks in Southeast China provide critical insights into the role of juvenile materials in their genesis, as evidenced by the presence of I- and A-type granites. This study presents comprehensive geochronological, mineralogical, geochemical, and Sr–Nd–Hf isotopic data for granites collected from the offshore drilling in the western East China Sea, located east of the Fuzhou City (Fujian Province), Southeast China. Zircon, apatite, and titanite U–Pb dating reveal that the granite samples formed at 112–111 Ma. The samples exhibit geochemical characteristics typical of I-type granites, with negative whole-rock εNd(t) values (–4.4) and zircon εHf(t) values ranging from –2.8 to 0.1. These I-type granites were primarily formed through partial melting of mafic igneous protoliths, followed by magma mixing with ancient crustal materials. We propose that the SE China coast underwent a transition from a compressional to a lithospheric extensional environment during the late Early Cretaceous, driven by the slab rollback of the subducted Paleo-Pacific Plate. This lithospheric extension facilitated the underplating of mantle-derived magma, which modified the crustal source and induced melting of continental arc crustal materials.http://www.sciencedirect.com/science/article/pii/S2772883825000500CretaceousGraniteOffshorePetrogenesisSoutheast ChinaGeochemistry |
| spellingShingle | Han Yan Xi-Yao Li Xun Yuan Sanzhong Li Xin Chen Pengcheng Wang Yu Wang Jie Gao Petrogenesis and tectonic implications of Early Cretaceous I-type granites from offshore drilling in east of the Fuzhou City, Southeast China Geosystems and Geoenvironment Cretaceous Granite Offshore Petrogenesis Southeast China Geochemistry |
| title | Petrogenesis and tectonic implications of Early Cretaceous I-type granites from offshore drilling in east of the Fuzhou City, Southeast China |
| title_full | Petrogenesis and tectonic implications of Early Cretaceous I-type granites from offshore drilling in east of the Fuzhou City, Southeast China |
| title_fullStr | Petrogenesis and tectonic implications of Early Cretaceous I-type granites from offshore drilling in east of the Fuzhou City, Southeast China |
| title_full_unstemmed | Petrogenesis and tectonic implications of Early Cretaceous I-type granites from offshore drilling in east of the Fuzhou City, Southeast China |
| title_short | Petrogenesis and tectonic implications of Early Cretaceous I-type granites from offshore drilling in east of the Fuzhou City, Southeast China |
| title_sort | petrogenesis and tectonic implications of early cretaceous i type granites from offshore drilling in east of the fuzhou city southeast china |
| topic | Cretaceous Granite Offshore Petrogenesis Southeast China Geochemistry |
| url | http://www.sciencedirect.com/science/article/pii/S2772883825000500 |
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