EARLY CRETACEOUS INTRUSIVE ROCKS IN XIUYAN-FENGCHENG AREA, EASTERN LIAONING: Geochronology, Geochemistry and Geological Implication

LI Hai-yang; YAN Wei; WU Wen-bin; WANG Xiao-liang; WANG Yu-ping; LI Chao; XU Yang

doi:10.13686/j.cnki.dzyzy.2024.03.004

2024 Vol. 33, No. 3

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Article navigation > Geology and Resources > 2024 > 33(3): 300-309

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LI Hai-yang, YAN Wei, WU Wen-bin, WANG Xiao-liang, WANG Yu-ping, LI Chao, XU Yang. EARLY CRETACEOUS INTRUSIVE ROCKS IN XIUYAN-FENGCHENG AREA, EASTERN LIAONING: Geochronology, Geochemistry and Geological Implication[J]. Geology and Resources, 2024, 33(3): 300-309. doi: 10.13686/j.cnki.dzyzy.2024.03.004

Citation:

LI Hai-yang, YAN Wei, WU Wen-bin, WANG Xiao-liang, WANG Yu-ping, LI Chao, XU Yang. EARLY CRETACEOUS INTRUSIVE ROCKS IN XIUYAN-FENGCHENG AREA, EASTERN LIAONING: Geochronology, Geochemistry and Geological Implication[J]. Geology and Resources, 2024, 33(3): 300-309. doi: 10.13686/j.cnki.dzyzy.2024.03.004

EARLY CRETACEOUS INTRUSIVE ROCKS IN XIUYAN-FENGCHENG AREA, EASTERN LIAONING: Geochronology, Geochemistry and Geological Implication

1.
Liaoning Geology and Mineral Research Institute Co., Ltd., Shenyang 110032, China
2.
Liaoning Geology and Mineral Resources Group Ecological Restoration Co., Ltd., Shenyang 110032, China

Received Date: 20 April 2023

Revised Date: 03 July 2023

Publish Date: 25 June 2024

Abstract

Abstract

The paper studies the geochronology and geochemistry of Qinjialing granodiorite and Hongqiling quartz diorite in Xiuyan-Fengcheng area, eastern Liaoning Province. The LA-ICP-MS zircon U-Pb dating yields the weighted average ages of 127.5±0.9 Ma for Qinjialing granodiorite and 126.5±0.8 Ma for Hongqiling quartz diorite, both of which were formed in the Early Cretaceous. The lithogeochemical analysis results show that the content of SiO₂ in Qinjialling granodiorite is 70.40%-72.28%, with the A/CNK and A/NK values of 0.99-1.06 and 1.44-1.61, respectively. The granodiorite is characterized by relatively enriched LREEs, depleted LILEs (Ba and Sr) and HFSEs (Nb, P and Ti), and enriched Rb, Th, La, Nd, and Hf, with the zircon saturation temperature ranging from 755℃ to 816℃, belonging to peraluminous Ⅰ-type granite, formed by the partial melting of lower crust. The content of SiO₂ in Hongqiling quartz diorite is 56.42%-57.22%, with the A/CNK and A/NK values of 1.04-1.09 and 1.70-1.83, respectively. The quartz diorite is characterized by obvious negative Eu anomaly, depleted Sr, Nb, Ta, Ti and P, and enriched Ba, Rb, K, Zr, Hf and Th. The source material is derived from the crust with minors of mantle-derived component. The Qinjialing granodiorite and Hongqiling quartz diorite were formed in the Early Cretaceous extensional environment of eastern Liaoning, which are closely related to the destruction of North China Craton and lithospheric thinning.
- granodiorite /
- quartz diorite /
- zircon U-Pb dating /
- geochemistry /
- Early Cretaceous /
- eastern Liaoning Province

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References

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