福建锦城187Ma花岗岩的发现: 对华南沿海早侏罗世构造演化的制约

Qian Liu; Jin Hai Yu; Bin Su; Qin Wang; Hong Feng Tang; Hai Xu; Xiang Cui

福建锦城187Ma花岗岩的发现: 对华南沿海早侏罗世构造演化的制约

Translated title of the contribution: Discovery of the 187Ma granite in Jincheng area, Fujian Province: constraint on Early Jurassic tectonic evolution of Southeastern China

Qian Liu^*, Jin Hai Yu, Bin Su, Qin Wang, Hong Feng Tang, Hai Xu, Xiang Cui

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

This study presents bulk geochemical and zircon U-Pb-Hf isotopic results for the Jincheng granite and Niutouwei granodiorite in the Fuqing area, coastal Fujian Province. LA-ICP-MS zircon U-Pb dating results show that the Jincheng granite has an crystallization age of 187 ± IMa, which is the firstly found Early Jurassic magmatism in the coastal Fujian Province, and the Niutouwei granodiorite is 130 ± IMa, representing a stage of Late Yanshanian (Cretaceous) magmatism. The Jincheng granite is high-K calc- alkaline, and characterized by high contents of SiO₂, alkali and Fe₂ O₂^T. It is depleted in HFSE ( Nb, Ta, Ti) , and enriched in LREE and LILE, such as Ba, Sr with high Rb/Sr (1.31 ∼ 1. 93 ) ratios and low Rb/Ba ( 0. 26 ∼ 0. 29 ) , Eu/Eu * ( 0. 30 ∼ 0. 56 ) , La/Yb (5. 69 ∼ 18. 39) , Sr/Y (2.24 ∼ 2. 29) ratios. The Jincheng granite is typical I-type granite with the volcanic arc granitic (VAG) geochemical characteristics, and formed in the subduction-related tectonic setting. The Niutouwei granodiorite has higher Mg, Ca, Ba, Sr contents, lower SiO ₂, K, Nb, Ta contents and lower Rb/Sr (0. 27) , Rb/Ba (0. 09) ratios and higher Eu/Eu* (0. 98) , La/Yb ( 16. 87) , Sr/Y ( 19. 08) ratios than the Jincheng granite. The Niutouwei granodiorite is also calc-alkaline I-type granite with the VAG geochemical characteristics similar to the Jincheng granite, and formed in the continental arc environment. The Jincheng granite and Niutouwei granodiorite have similar Hf isotopic compositions of zircons with positive ε_Hf(t) values (2. 18 ∼ 4. 73 and 1.25 ∼ 4. 15 respectively) and Hf model ages ( ∼ 1.OGa) , suggesting that they originated from similar source, a Neoproterozoic juvenile crust. Coupled with previous data, this paper points out that the Jincheng granite has genetic relationship with the coeval magmatism (194 ∼ 172Ma) in the Nanling Range, implying that the subduction of paleo-Pacific plate probably started from Early Jurassic time. Consequently, the transition from the Tethys orogenic regime to the paleo-Pacific tectonic regime in the Southeast China probably occurred before Early Jurassic, approximately from 205Ma to 190Ma.

Translated title of the contribution	Discovery of the 187Ma granite in Jincheng area, Fujian Province: constraint on Early Jurassic tectonic evolution of Southeastern China
Original language	Chinese
Pages (from-to)	3575-3589
Number of pages	15
Journal	Acta Petrologica Sinica
Volume	27
Issue number	12
Publication status	Published - 2011
Externally published	Yes

Keywords

Early Jurassic granite
Pingtan-Dongshan metamorphic belt
The subduction of paleo-Pacific plate
Zircon U-Pb-Hf isotope analyses

Cite this

@article{4ce01ab71ed549b7930fbf5df1597008,

title = "福建锦城187Ma花岗岩的发现: 对华南沿海早侏罗世构造演化的制约",

abstract = "This study presents bulk geochemical and zircon U-Pb-Hf isotopic results for the Jincheng granite and Niutouwei granodiorite in the Fuqing area, coastal Fujian Province. LA-ICP-MS zircon U-Pb dating results show that the Jincheng granite has an crystallization age of 187 ± IMa, which is the firstly found Early Jurassic magmatism in the coastal Fujian Province, and the Niutouwei granodiorite is 130 ± IMa, representing a stage of Late Yanshanian (Cretaceous) magmatism. The Jincheng granite is high-K calc- alkaline, and characterized by high contents of SiO2, alkali and Fe2 O2T. It is depleted in HFSE ( Nb, Ta, Ti) , and enriched in LREE and LILE, such as Ba, Sr with high Rb/Sr (1.31 ∼ 1. 93 ) ratios and low Rb/Ba ( 0. 26 ∼ 0. 29 ) , Eu/Eu * ( 0. 30 ∼ 0. 56 ) , La/Yb (5. 69 ∼ 18. 39) , Sr/Y (2.24 ∼ 2. 29) ratios. The Jincheng granite is typical I-type granite with the volcanic arc granitic (VAG) geochemical characteristics, and formed in the subduction-related tectonic setting. The Niutouwei granodiorite has higher Mg, Ca, Ba, Sr contents, lower SiO 2, K, Nb, Ta contents and lower Rb/Sr (0. 27) , Rb/Ba (0. 09) ratios and higher Eu/Eu* (0. 98) , La/Yb ( 16. 87) , Sr/Y ( 19. 08) ratios than the Jincheng granite. The Niutouwei granodiorite is also calc-alkaline I-type granite with the VAG geochemical characteristics similar to the Jincheng granite, and formed in the continental arc environment. The Jincheng granite and Niutouwei granodiorite have similar Hf isotopic compositions of zircons with positive εHf(t) values (2. 18 ∼ 4. 73 and 1.25 ∼ 4. 15 respectively) and Hf model ages ( ∼ 1.OGa) , suggesting that they originated from similar source, a Neoproterozoic juvenile crust. Coupled with previous data, this paper points out that the Jincheng granite has genetic relationship with the coeval magmatism (194 ∼ 172Ma) in the Nanling Range, implying that the subduction of paleo-Pacific plate probably started from Early Jurassic time. Consequently, the transition from the Tethys orogenic regime to the paleo-Pacific tectonic regime in the Southeast China probably occurred before Early Jurassic, approximately from 205Ma to 190Ma.",

keywords = "Early Jurassic granite, Pingtan-Dongshan metamorphic belt, The subduction of paleo-Pacific plate, Zircon U-Pb-Hf isotope analyses",

author = "Qian Liu and Yu, {Jin Hai} and Bin Su and Qin Wang and Tang, {Hong Feng} and Hai Xu and Xiang Cui",

year = "2011",

language = "Chinese",

volume = "27",

pages = "3575--3589",

journal = "Acta Petrologica Sinica",

issn = "1000-0569",

publisher = "Science Press",

number = "12",

}

TY - JOUR

T1 - 福建锦城187Ma花岗岩的发现

T2 - 对华南沿海早侏罗世构造演化的制约

AU - Liu, Qian

AU - Yu, Jin Hai

AU - Su, Bin

AU - Wang, Qin

AU - Tang, Hong Feng

AU - Xu, Hai

AU - Cui, Xiang

PY - 2011

Y1 - 2011

N2 - This study presents bulk geochemical and zircon U-Pb-Hf isotopic results for the Jincheng granite and Niutouwei granodiorite in the Fuqing area, coastal Fujian Province. LA-ICP-MS zircon U-Pb dating results show that the Jincheng granite has an crystallization age of 187 ± IMa, which is the firstly found Early Jurassic magmatism in the coastal Fujian Province, and the Niutouwei granodiorite is 130 ± IMa, representing a stage of Late Yanshanian (Cretaceous) magmatism. The Jincheng granite is high-K calc- alkaline, and characterized by high contents of SiO2, alkali and Fe2 O2T. It is depleted in HFSE ( Nb, Ta, Ti) , and enriched in LREE and LILE, such as Ba, Sr with high Rb/Sr (1.31 ∼ 1. 93 ) ratios and low Rb/Ba ( 0. 26 ∼ 0. 29 ) , Eu/Eu * ( 0. 30 ∼ 0. 56 ) , La/Yb (5. 69 ∼ 18. 39) , Sr/Y (2.24 ∼ 2. 29) ratios. The Jincheng granite is typical I-type granite with the volcanic arc granitic (VAG) geochemical characteristics, and formed in the subduction-related tectonic setting. The Niutouwei granodiorite has higher Mg, Ca, Ba, Sr contents, lower SiO 2, K, Nb, Ta contents and lower Rb/Sr (0. 27) , Rb/Ba (0. 09) ratios and higher Eu/Eu* (0. 98) , La/Yb ( 16. 87) , Sr/Y ( 19. 08) ratios than the Jincheng granite. The Niutouwei granodiorite is also calc-alkaline I-type granite with the VAG geochemical characteristics similar to the Jincheng granite, and formed in the continental arc environment. The Jincheng granite and Niutouwei granodiorite have similar Hf isotopic compositions of zircons with positive εHf(t) values (2. 18 ∼ 4. 73 and 1.25 ∼ 4. 15 respectively) and Hf model ages ( ∼ 1.OGa) , suggesting that they originated from similar source, a Neoproterozoic juvenile crust. Coupled with previous data, this paper points out that the Jincheng granite has genetic relationship with the coeval magmatism (194 ∼ 172Ma) in the Nanling Range, implying that the subduction of paleo-Pacific plate probably started from Early Jurassic time. Consequently, the transition from the Tethys orogenic regime to the paleo-Pacific tectonic regime in the Southeast China probably occurred before Early Jurassic, approximately from 205Ma to 190Ma.

AB - This study presents bulk geochemical and zircon U-Pb-Hf isotopic results for the Jincheng granite and Niutouwei granodiorite in the Fuqing area, coastal Fujian Province. LA-ICP-MS zircon U-Pb dating results show that the Jincheng granite has an crystallization age of 187 ± IMa, which is the firstly found Early Jurassic magmatism in the coastal Fujian Province, and the Niutouwei granodiorite is 130 ± IMa, representing a stage of Late Yanshanian (Cretaceous) magmatism. The Jincheng granite is high-K calc- alkaline, and characterized by high contents of SiO2, alkali and Fe2 O2T. It is depleted in HFSE ( Nb, Ta, Ti) , and enriched in LREE and LILE, such as Ba, Sr with high Rb/Sr (1.31 ∼ 1. 93 ) ratios and low Rb/Ba ( 0. 26 ∼ 0. 29 ) , Eu/Eu * ( 0. 30 ∼ 0. 56 ) , La/Yb (5. 69 ∼ 18. 39) , Sr/Y (2.24 ∼ 2. 29) ratios. The Jincheng granite is typical I-type granite with the volcanic arc granitic (VAG) geochemical characteristics, and formed in the subduction-related tectonic setting. The Niutouwei granodiorite has higher Mg, Ca, Ba, Sr contents, lower SiO 2, K, Nb, Ta contents and lower Rb/Sr (0. 27) , Rb/Ba (0. 09) ratios and higher Eu/Eu* (0. 98) , La/Yb ( 16. 87) , Sr/Y ( 19. 08) ratios than the Jincheng granite. The Niutouwei granodiorite is also calc-alkaline I-type granite with the VAG geochemical characteristics similar to the Jincheng granite, and formed in the continental arc environment. The Jincheng granite and Niutouwei granodiorite have similar Hf isotopic compositions of zircons with positive εHf(t) values (2. 18 ∼ 4. 73 and 1.25 ∼ 4. 15 respectively) and Hf model ages ( ∼ 1.OGa) , suggesting that they originated from similar source, a Neoproterozoic juvenile crust. Coupled with previous data, this paper points out that the Jincheng granite has genetic relationship with the coeval magmatism (194 ∼ 172Ma) in the Nanling Range, implying that the subduction of paleo-Pacific plate probably started from Early Jurassic time. Consequently, the transition from the Tethys orogenic regime to the paleo-Pacific tectonic regime in the Southeast China probably occurred before Early Jurassic, approximately from 205Ma to 190Ma.

KW - Early Jurassic granite

KW - Pingtan-Dongshan metamorphic belt

KW - The subduction of paleo-Pacific plate

KW - Zircon U-Pb-Hf isotope analyses

UR - http://www.scopus.com/inward/record.url?scp=84977982139&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84977982139

VL - 27

SP - 3575

EP - 3589

JO - Acta Petrologica Sinica

JF - Acta Petrologica Sinica

SN - 1000-0569

IS - 12

ER -

福建锦城187Ma花岗岩的发现: 对华南沿海早侏罗世构造演化的制约

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