Geochronology, Geochemistry and Sr‐Nd‐Hf Isotopes of Early–Middle Triassic Adakitic Plutons in Central‐eastern Jilin Province, NE China: Constraints on the Non‐synchronous Closure of Paleo‐Asian Ocean

Chao, Shi; Ding, Xiaozhong; Zhou, Xiaodong; Nie, Lanshi; Zhang, Jibiao

doi:10.1111/1755-6724.14906

Cited by 4 publications

(1 citation statement)

References 96 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…330 to 345 Ma;Chen et al, 2017). The presence of adakites in the Nianzi granite unit implies that the previous subduction and collision events had ceased (e.g., Shi et al, 2022); instead, an extensional environment began in the northern NCC, during the Early Triassic period.…”

Section: Tectonic Implicationsmentioning

confidence: 99%

Petrogenesis and Tectonic Implications of the Early Triassic Nianzi Adakitic Granite Unit in the Yanshan Fold and Thrust Belt: New Constraints from U‐Pb Geochronology and Sr‐Nd‐Hf Isotopes

ZHANG,

WU,

et al. 2024

Acta Geologica Sinica (Eng)

View full text Add to dashboard Cite

The Nianzi granite unit, which includes the Nianzi, Xiaolianghou, and Xiawopu granite intrusions, is a significant component in the northern part of the North China Craton (NCC) and is situated in the Yanshan Fold and Thrust Belt (YFTB). However, there is still debate regarding the tectonic evolution history of the YFTB during the late Permian to Triassic period, specifically regarding the timing of subduction and collision between the NCC and Paleo‐Asian ocean. The Nianzi granite unit exhibits unique petrologic, geochronologic, and geochemical signatures that shed light on the tectonic evolution history of the YFTB. This study presents detailed petrology, whole‐rock geochemistry, and Sr‐Nd isotopic, zircon U‐Pb dating, and Lu‐Hf isotopic data of the granites within the Nianzi granite unit. Our findings demonstrate that the granites primarily comprise subhedral K‐feldspar, plagioclase, quartz, minor biotite and hornblende, and accessory titanite, apatite, magnetite, and zircon. Zircon U‐Pb dating indicates that the Xiaolianghou granite was emplaced at 247.5 ± 0.62 Ma. Additionally, the adakitic characteristics of the Nianzi, Xiawopu, and Xiaolianghou granite intrusions, such as high Sr and Ba contents and high ratios of Sr/Y and (La/Yb)N, combined with negative Sr‐Nd and Lu‐Hf isotopes (87Sr/86Sri = 0.705681–0.7057433, ɛNd(t) = −20.97 to −21.98, zircon ɛHf(t) = −9.92 to −20.26), as well as I‐type granite features of high SiO2, Na2O, and K2O/Na2O ratios, enriched Rb, K, Sr, and Ba, and depleted Th, U, Nb, Ta, P, and Ti, suggest that the Nianzi granite unit was mainly derived from the partial melting of a thickened lower crust containing hydrous, calc‐alkaline to high‐K calc‐alkaline, mafic to intermediate metamorphic rocks. In light of these parameters, we further integrate our data with previous studies and conclude that the Nianzi granite unit was generated in a post‐collisional extensional environment during the Early Triassic.

show abstract

Section: Tectonic Implicationsmentioning

confidence: 99%

Petrogenesis and Tectonic Implications of the Early Triassic Nianzi Adakitic Granite Unit in the Yanshan Fold and Thrust Belt: New Constraints from U‐Pb Geochronology and Sr‐Nd‐Hf Isotopes

ZHANG,

WU,

et al. 2024

Acta Geologica Sinica (Eng)

View full text Add to dashboard Cite

show abstract

Neoproterozoic slab window in the western Yangtze Block, South China: Evidence from adakitic granodiorites, gabbro-diorites and high-K granites in the Panxi arc belt

Zhang,

Shi,

Liu

et al. 2024

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

The final closure time of the eastern segment of the Paleo-Asian Ocean: Insights from geochronology and geochemistry of Permian-Triassic sedimentary sequence in Wangqing, Jilin Province, China

Yin,

Liang,

Zheng

et al. 2024

Geol. Mag.

View full text Add to dashboard Cite

The Central Asian Orogenic Belt is the world’s largest accretionary orogenic belt, associated with the closure of the Paleo-Asian Ocean (PAO). However, the final closure timing of the eastern PAO remains contentious. The Permian-Triassic sedimentary sequences in the Wangqing area along the Changchun-Yanji suture zone offer important clues into this final closure. New data on petrology, whole-rock geochemistry, zircon U-Pb geochronology and zircon Hf isotopes of sedimentary rocks from the Miaoling Formation and Kedao Group in Wangqing area provide new insights into the final closure of the eastern end of the PAO. The maximum deposition ages of the Miaoling Formation and Kedao Group have been constrained to the Late Permian (ca. 253 Ma) and early Middle Triassic (ca. 243 Ma), respectively. These sedimentary rocks exhibit similar geochemical characteristics, showing low textural and compositional maturities, implying short sediment transport, with all detrital zircons suggesting their origins from felsic igneous rocks. The εHf(t) values of the Miaoling Formation range from −6.09 to 12.43 and from −2.20 to 7.59 for the Kedao Group, implying these rocks originated from NE China. Considering our new data along with previously published data, we propose that a reduced remnant ocean remained along the Changchun-Yanji suture zone in the early Middle Triassic (ca. 243 Ma), suggesting the final closure of the eastern PAO likely occurred between the latest Middle Triassic and early Late Triassic.

show abstract

Geochronology, Geochemistry and Sr‐Nd‐Hf Isotopes of Early–Middle Triassic Adakitic Plutons in Central‐eastern Jilin Province, NE China: Constraints on the Non‐synchronous Closure of Paleo‐Asian Ocean

Cited by 4 publications

References 96 publications

Petrogenesis and Tectonic Implications of the Early Triassic Nianzi Adakitic Granite Unit in the Yanshan Fold and Thrust Belt: New Constraints from U‐Pb Geochronology and Sr‐Nd‐Hf Isotopes

Petrogenesis and Tectonic Implications of the Early Triassic Nianzi Adakitic Granite Unit in the Yanshan Fold and Thrust Belt: New Constraints from U‐Pb Geochronology and Sr‐Nd‐Hf Isotopes

Neoproterozoic slab window in the western Yangtze Block, South China: Evidence from adakitic granodiorites, gabbro-diorites and high-K granites in the Panxi arc belt

The final closure time of the eastern segment of the Paleo-Asian Ocean: Insights from geochronology and geochemistry of Permian-Triassic sedimentary sequence in Wangqing, Jilin Province, China

Contact Info

Product

Resources

About