东海盆地宝云亭花岗岩潜山的形成与演化过程：来自锆石U-Pb同位素年代学与岩石地球化学的约束

刘建斌; 李宁; 刘彬; 赵洪; 周虎; 岳勇

doi:10.3799/dqkx.2026.124

Volume 51 Issue 5

May 2026

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Article Navigation > Earth Science > 2026 > 51(5): 1997-2010

Liu Jianbin, Li Ning, Liu Bin, Zhao Hong, Zhou Hu, Yue Yong, 2026. Formation and Evolution Process of Baoyunting Granite Buried Hill in the East China Sea Basin: Constraints from Zircon U-Pb Isotopic Geochronology and Petrogeochemistry. Earth Science, 51(5): 1997-2010. doi: 10.3799/dqkx.2026.124

Citation:

Liu Jianbin, Li Ning, Liu Bin, Zhao Hong, Zhou Hu, Yue Yong, 2026. Formation and Evolution Process of Baoyunting Granite Buried Hill in the East China Sea Basin: Constraints from Zircon U-Pb Isotopic Geochronology and Petrogeochemistry. Earth Science, 51(5): 1997-2010. doi: 10.3799/dqkx.2026.124

Citation:

Liu Jianbin, Li Ning, Liu Bin, Zhao Hong, Zhou Hu, Yue Yong, 2026. Formation and Evolution Process of Baoyunting Granite Buried Hill in the East China Sea Basin: Constraints from Zircon U-Pb Isotopic Geochronology and Petrogeochemistry. Earth Science, 51(5): 1997-2010. doi: 10.3799/dqkx.2026.124

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Formation and Evolution Process of Baoyunting Granite Buried Hill in the East China Sea Basin: Constraints from Zircon U-Pb Isotopic Geochronology and Petrogeochemistry

doi: 10.3799/dqkx.2026.124

Liu Jianbin^{1
,
,},
Li Ning¹,
Liu Bin^{2, 3
,
,
,},
Zhao Hong¹,
Zhou Hu¹,
Yue Yong¹

1.
Shanghai Branch of CNOOC (China) Ltd., Shanghai 200335, China
2.
School of Geosciences, Yangtze University, Wuhan 430100, China
3.
Hubei Engineering Research Center of Unconventional Petroleum Geology and Engineering, Wuhan 430100, China

Received Date: 2026-04-08
Publish Date: 2026-05-25

Abstract

Abstract

Current understanding remains limited regarding the formation age, petrological composition, genetic mechanisms, and tectonic evolution of the granite encountered in the Baoyunting buried hill within the East China Sea basin. This study presents an integrated zircon U-Pb geochronological and petrogeochemical investigation on granites from two key exploration wells in the Baoyunting area. The objectives are to determine the petrogenesis and deep-seated geodynamic setting of these granites, and to further unravel their formation and evolution processes. Zircon LA-ICP-MS U-Pb dating reveals crystallization ages of 106.9-108.8 Ma for the Baoyunting granites, while the overlying pyroclastic rocks yield younger ages of 35.9-41.3 Ma. The granitic pluton primarily comprises granite and granodiorite, exhibiting geochemical affinities to high-Sr/Y granites or adakitic rocks. Combined petrological and geochemical evidence suggests that the Baoyunting granites originated from partial melting of basaltic rocks within a thickened lower crust during the Early Cretaceous. Integrating the results with regional multidisciplinary data, it proposes that these granites formed in a tectonic setting associated with the Paleo-Pacific Plate slab rollback during the late Early Cretaceous. The evolution of the Baoyunting granite buried hill involved three distinct stages: (1) pluton emplacement, (2) uplift-denudation, and (3) subsidence.
- granite buried hill,
- zircon U-Pb geochronology,
- petrogenesis,
- Baoyunting,
- East China Sea basin,
- geochemistry

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References(54)

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Formation and Evolution Process of Baoyunting Granite Buried Hill in the East China Sea Basin: Constraints from Zircon U-Pb Isotopic Geochronology and Petrogeochemistry

doi: 10.3799/dqkx.2026.124

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