Paleoproterozoic oceanic subduction in the North China Craton: Insights from the metamorphic P–T–t paths of the Chicheng Mélange in the Hongqiyingzi Complex

Zhang, Yuanyuan; Wei, Chunjing; Chu, Hong

doi:10.1016/j.precamres.2020.105671

Cited by 27 publications

(8 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2a) and one retrograded eclogite (Fig. 2b) are consistent with previous results which suggest that the eclogite facies metamorphism for the Chicheng mélange possibly occurred at 1.80-1.85 Ga 30,31,38 . This event is also consistent with the formation timing of TNCO [26][27][28] .…”

Section: Discussionsupporting

confidence: 91%

“…The retrograded eclogites and serpentinized peridotites are exposed as tectonic lenses within the gneisses of the Archean Hongqiyingzi complex (Fig. 1b), which are interpreted as parts of Late Archean-Early Paleoproterozoic oceanic lithosphere [29][30][31] . The gneisses represent meta-volcano-sedimentary units 30,31 , and the retrograded eclogites and peridotites represent fragments of tholeiitic oceanic crust 32 and sub-oceanic lithospheric mantle, respectively 29,33 .…”

Section: Geological Background and Samplesmentioning

confidence: 99%

“…1b), which are interpreted as parts of Late Archean-Early Paleoproterozoic oceanic lithosphere [29][30][31] . The gneisses represent meta-volcano-sedimentary units 30,31 , and the retrograded eclogites and peridotites represent fragments of tholeiitic oceanic crust 32 and sub-oceanic lithospheric mantle, respectively 29,33 . Together, they experienced eclogite-facies metamorphism at 1.85-1.80 Ga 30,31 , and then exhumed to amphibolite facies at 326-300 Ma 31,34,35 .…”

Section: Geological Background and Samplesmentioning

confidence: 99%

See 2 more Smart Citations

Retrograded Eclogite From Chicheng, North China Craton: New Insights Into the Fidelity of U-Pb-Hf-O Isotopes in Zircon During High-grade Metamorphism

Zou

Zhang

Santosh³

2021

Preprint

View full text Add to dashboard Cite

Zircon is the most abundantly used mineral for dating igneous and metamorphic events and for tracing source characteristics. Understanding the geochemical behavior of the U-Pb-Hf-O isotope systems during high-grade metamorphism is therefore important for accurate interpretation of the isotopic information. We report zircon U-Pb-Hf-O isotopes and trace elements of retrograded eclogites and host gneisses from Chicheng, North China Craton, with the aim to obtain new insights into the fidelity of U-Pb-Hf-O isotopes in zircon as recorders of high-grade metamorphism. U-Pb dating suggested that the Chicheng mélange experienced eclogite facies metamorphism at ~1.84 Ga, and then exhumed to amphibolite facies at 320–300 Ma. Zircons with Paleoproterozoic ages formed in metamorphic melts-derived from the gneiss during the eclogite facies metamorphism. Zircons with ages of 300–320 Ma formed by recrystallization of peak metamorphic zircons during fluid-assisted amphibolite-facies retrograde metamorphism. This process led to the near-complete resetting not only of U-Pb ages but also of Hf-O isotopic compositions of the peak metamorphic zircons, while preserve REE patterns. These results contrast with the sluggish Hf diffusion rate predicted from experimental studies, and support findings that isotopic data from metamorphic zircons in retrograded high-grade metamorphic rocks need not be faithful recorders of their sources.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Geological Background and Samplesmentioning

confidence: 99%

Section: Geological Background and Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Retrograded Eclogite From Chicheng, North China Craton: New Insights Into the Fidelity of U-Pb-Hf-O Isotopes in Zircon During High-grade Metamorphism

Zou

Zhang

Santosh³

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…e tectonic evolution of the central part of the northern margin of the North China Craton has become a hot academic research focus in recent years. As a significant component of the dismembered ophiolite mélange of the Hongqiyingzi Complex [1], the retrograded eclogite which recorded the evolution history of the Paleoasian Ocean has been attracting more and more attention [2][3][4][5][6][7][8][9]. e tectonic evolution of the Chicheng retrograded eclogite can be classified into four stages [10]: (1) the protolith formation stage, (2) the peak eclogite facies stage, (3) the granulite facies stage, and (4) the amphibolite facies stage.…”

Section: Introductionmentioning

confidence: 99%

“…e tectonic evolution of the Chicheng retrograded eclogite can be classified into four stages [10]: (1) the protolith formation stage, (2) the peak eclogite facies stage, (3) the granulite facies stage, and (4) the amphibolite facies stage. Previous chronology studies shows that the metamorphic age of the retrograded eclogite are still under disputes: 325 Ma of SHRIMP zircon U-Pb age was recommended as the peak metamorphic age by Ni et al [10]; 355 Ma of SHRIMP zircon U-Pb age was proposed as the peak metamorphic age by Kong et al [11]; 1847-1840 Ma of SIMS zircon U-Pb age was recommended as the peak metamorphic age by Liu et al [1]; 1.85-1.80 Ga, 460-420 Ma, and 360-270 Ma of zircon U-Pb age was proposed as the peak metamorphic age, retrograded metamorphic age, and amphibolite fancies metamorphic age, respectively, by Zhang et al [8].…”

Section: Introductionmentioning

confidence: 99%

Zircon U–Pb Dating and Lu‐Hf Isotope of the Retrograded Eclogite from Chicheng, Northern Hebei Province, China

Kong

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

We report zircon U–Pb ages and Lu-Hf isotopic data from two sample of the retrograded eclogite in the Chicheng area. Two groups of the metamorphic zircons from the Chicheng retrograded eclogite were identified: group one shows characteristics of depletion in LREE and flat in HREE curves and exhibit no significant Eu anomaly, and this may imply that they may form under eclogite facies metamorphic condition; group two is rich in HREE and shows slight negative Eu anomaly indicated that they may form under amphibolite facies metamorphic condition. Zircon Lu-Hf isotopic of εHf from the Chicheng eclogite has larger span range from 6.0 to 18.0, which suggests that the magma of the eclogite protolith may be mixed with partial crustal components. The peak eclogite facies metamorphism of Chicheng eclogite may occur at 348.5–344.2 Ma and its retrograde metamorphism of amphibolite fancies may occur at ca. 325.0 Ma. The Hongqiyingzi Complex may experience multistage metamorphic events mainly including Late Archean (2494–2448 Ma), Late Paleoproterozoic (1900–1734 Ma, peak age = 1824.6 Ma), and Phanerozoic (495–234 Ma, peak age = 323.7 Ma). Thus, the metamorphic event (348.5–325 Ma) of the Chicheng eclogite is in accordance with the Phanerozoic metamorphic event of the Hongqiyingzi Complex. The eclogite facies metamorphic age of the eclogite is in accordance with the metamorphism (granulite facies or amphibolite facies) of its surrounding rocks, which implied that the tectonic subduction and exhumation of the retrograded eclogite may cause the regional metamorphism of garnet biotite plagioclase gneiss.

show abstract

Plate tectonics in relation to mantle temperatures and metamorphic properties

Kusky

2020

Sci. China Earth Sci.

View full text Add to dashboard Cite

Paleoproterozoic oceanic subduction in the North China Craton: Insights from the metamorphic P–T–t paths of the Chicheng Mélange in the Hongqiyingzi Complex

Cited by 27 publications

References 87 publications

Retrograded Eclogite From Chicheng, North China Craton: New Insights Into the Fidelity of U-Pb-Hf-O Isotopes in Zircon During High-grade Metamorphism

Retrograded Eclogite From Chicheng, North China Craton: New Insights Into the Fidelity of U-Pb-Hf-O Isotopes in Zircon During High-grade Metamorphism

Zircon U–Pb Dating and Lu‐Hf Isotope of the Retrograded Eclogite from Chicheng, Northern Hebei Province, China

Plate tectonics in relation to mantle temperatures and metamorphic properties

Contact Info

Product

Resources

About