2.9 Ga magmatism in Eastern Hebei, North China Craton

Liou, Peng; Guo, Jinghui; Huang, Guangqing; Fan, Wenbo

doi:10.1016/j.precamres.2017.11.002

Cited by 30 publications

(5 citation statements)

References 51 publications

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“…The supracrustal rafts mainly comprise mafic granulites and amphibolites with a few ultramafic, pelitic, felsic, and BIF interlayers (Geng et al, ; Polat, Kusky, Li, & Fryer, ). Recent zircon dating of felsic gneiss yielded the magmatic age of c. 2.90 Ga and metamorphic age of c. 2.50 Ga (Liou, Guo, Huang, & Fan, ) while mafic granulites, amphibolites, and BIFs from Zunhua and Saheqiao areas show similar magmatic crystallization ages of 2.61–2.52 Ga and two groups of metamorphic ages of 2.53–2.47 and 1.97–1.83 Ga (Fu et al, ; Guo et al, ; Yang & Wei, ; Zhang et al, ). The garnet‐bearing mafic granulites were dated to yield garnet–whole rock Lu–Hf isochron ages of 1,766.6 ± 7.0 and 1,787 ± 22 Ma (Yang & Wei, ).…”

Section: Geological Settingmentioning

confidence: 99%

MetamorphicP‒Tpaths and Zircon U–Pb ages of Archean ultra‐high temperature paragneisses from the Qian’an gneiss dome, East Hebei terrane, North China Craton

Liu

Wei

2020

Journal Metamorphic Geology

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The East Hebei terrane of North China Craton is characterized by the dome-and-keel structure, a common feature in most Archean cratons, where supracrustal rocks of granulite facies commonly occur as enclaves or rafts in tonalite-trondhjemite-granodiorite (TTG) gneisses. The metamorphic P-T paths of the granulites are significant for addressing the Archean tectonic regimes. Two types of granulite facies paragneiss with pelitic and greywacke compositions from the western margin of Qian'an gneiss dome are documented for their petrography, mineral chemistry, phase equilibria modelling using thermocalc, and zircon dating. Anticlockwise P-T paths involving the pre-peak pressure increase to the ultra-high temperature peak conditions and post-peak cooling and decompression processes were recognized. The pre-peak pressure increase process was constrained for a pelitic granulite mainly based on the spinel and cordierite inclusions in garnet and rutile corona around ilmenite, where the transition from spinel to garnet is modelled at 6-7 kbar at a fixed T = 1,000°C.For greywacke granulite, the pre-peak pressure increase evolution can be ascertained from the textural relation that orthopyroxene is surrounded by garnet, and the outwards increasing grossular (from 0.03 to 0.05) in the core of the atoll-like garnet (Grt-A), to occur from ~7 kbar at ~1,000°C. The peak P-T conditions for pelitic granulite are roughly limited to 7-11 kbar/890-1,050°C on the basis of the stability of the inferred peak assemblage involving garnet, perthite, sillimanite, rutile/ilmenite, and quartz. The peak P-T condition for greywacke granulite can be well constrained as 9-10 kbar/>1,000°C on the basis of the maximum grossular content (X Grs = 0.045-0.050) in the core of subhedral garnet (Grt-B) and the mantle of Grt-A together with an average re-integrated anorthite content (X An = 0.07) in K-feldspar.The peak temperature condition is consistent with the ternary feldspar thermometer results mostly of 950-1,020°C for antiperthite and perthite in greywacke granulite, and in accordance with the development of oriented needle-like exsolution of Ti±Fe oxides in garnet from pelitic granulite. The post-peak cooling and decompression process was consistent with the decreasing X Grs in the mantle of Grt-A and core of Grt-B in greywacke sample, and the final-stage cooling conditions can be well constrained from the stability of final assemblages marked by the later growth of biotite, as 8-9 kbar/820-880°C for pelitic granulite and 6-9 kbar/840-890°C for greywacke 330 | LIU and WEI the final pulse of the Neoarchean magmatic activity of TTGs that ranges from c. 2.56 to c. 2.48 Ga with a peak at c. 2.52 Ga. Combining the development of dome-andkeel structures, the penecontemporaneity between the metamorphism of supracrustal rocks and TTG magmatic activity, and also the unique anticlockwise P-T paths, we prefer a vertical sagduction regime to interpret the tectonic evolution of the East Hebei terrane, which may be also significant for other Archean cratons. K E Y...

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Section: Geological Settingmentioning

confidence: 99%

MetamorphicP‒Tpaths and Zircon U–Pb ages of Archean ultra‐high temperature paragneisses from the Qian’an gneiss dome, East Hebei terrane, North China Craton

Liu

Wei

2020

Journal Metamorphic Geology

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“…A C C E P T E D M A N U S C R I P T (Nutman et al, 2011;Han et al, 2014; and our unpublished data) and the ca. 2.9 Ga metavolcanic rocks and TTG gneisses in the Caochang area (Liou et al, 2017) of the Eastern Hebei Province, indicating that the Neoarchean lithological assemblages in the southeastern zone were most likely developed in a tectonic setting of active continental margin. The terrigenous sediments from the paleo-continental block recycled into the mantle along with the subduction of oceanic slab, which may be a main source of K in the sanukitoids.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Neoarchean magmatic arc in the Western Liaoning Province, northern North China Craton: Geochemical and isotopic constraints from sanukitoids and associated granitoids

Liu

Cawood

et al. 2018

Lithos

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The Neoarchean Western Liaoning basement terranes in the northern part of North China Craton chiefly consist of tholeiitic basalts in the north, TTG gneisses and metavolcanic rocks in the northwest, and K-rich granitoids in the southeast. In the southeastern zone, porphyritic monzodioritic-quartz monzodioritic-granodioritic-monzogranitic (MQGM) gneisses are the major lithological assemblage, and locally contain minor xenoliths of TTG gneisses. Based on the major mafic mineral phases, the porphyritic MQGM gneisses can be divided into amphibole-dominated and biotite-dominated groups. Zircon U-Pb isotopic dating indicates that the amphibole-dominated MQGM gneisses, biotite-dominated MQGM gneisses, and tonalitic gneiss xenolith were emplaced during 2546-2529 Ma, 2546-2531 Ma, and at 2563 Ma, respectively. The 2563 Ma tonalitic gneiss xenolith displays geochemical affinities to high-SiO 2 adakites, and may be formed by the partial melting of descending oceanic slabs, with the melt contaminated by mantle peridotite. The amphibole-dominated MQGM gneisses are geochemically analogous to sanukitoids, and their magmatic precursors were formed by partial melting of lithospheric mantle, which was metasomatized by dehydration fluids and melts derived from subducted oceanic sediments and slabs. The magmatic precursors of the biotite-dominated MQGM gneisses were generated by the partial melting of medium-K to high-K mafic rocks at medium pressures. Integrated with previous studies on supracrustal sequences and granitoids in Western Liaoning Province, the Neoarchean lithological assemblages in the southeastern zone were most likely formed in an active continental margin setting.

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“…The DTTG gneisses show similar magmatic crystallization ages of 2.55-2.50 Ga and metamorphic ages of 2.47-2.31 Ga [25,45]. Recently, ~2.9 Ga magmatic event in Zunhua was identified by the results of a comprehensive isotopic investigation of zircons from metamorphosed felsic gneisses and amphibolites [46]. The supracrustal rock series comprise mainly mafic granulites and amphibolites with a few ultramafic, pelitic and Banded Iron Formations (BIF) interlayers [47].…”

Section: Geological Settingmentioning

confidence: 99%

Zircon U-Pb Dating and Metamorphism of Granitoid Gneisses and Supracrustal Rocks in Eastern Hebei, North China Craton

Duan

Wei

et al. 2022

Minerals

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Granitoid gneisses dominated by tonalitic–trondhjemitic–granodioritic (TTG) compositions, with metamorphic supracrustal rocks consisting of sedimentary and volcanic rocks, are widely exposed in the Eastern Hebei terrane, North China Craton (NCC). This study presents systematic zircon U–Pb geochronological and whole-rock geochemical data of the Neoarchean granitoid gneisses and supracrustal rocks in Eastern Hebei. Zircon U–Pb isotopic dating for the representative samples reveals that magmatic precursors of granitoid gneisses were emplaced between 2524 ± 7 and 2503 ± 12 Ma, and the protoliths of the pelitic granulites were deposited in the Late Neoarchean era. Both of them have been subjected to granulite facies metamorphism during 2508 ± 10 to 2468 ± 33 Ma, coeval with the intrusion of syenogranitic pegmatite (2488 ± 5 Ma). Zircon ages of 2.45–2.01 Ga obtained from the analyzed samples were considered mixed data from 2.53–2.48 Ga and 1.9–1.8 Ga and were chronologically meaningless. Paleoproterozoic metamorphic zircon ages of 1.9–1.8 Ga were usually neglected because of hardly being obtained from TTG gneisses and supracrustal rocks. The tectonic regime during the Neoarchean era was considered to be dominated by vertical tectonism in the Eastern Hebei terrane.

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2.9 Ga magmatism in Eastern Hebei, North China Craton

Cited by 30 publications

References 51 publications

MetamorphicP‒Tpaths and Zircon U–Pb ages of Archean ultra‐high temperature paragneisses from the Qian’an gneiss dome, East Hebei terrane, North China Craton

MetamorphicP‒Tpaths and Zircon U–Pb ages of Archean ultra‐high temperature paragneisses from the Qian’an gneiss dome, East Hebei terrane, North China Craton

Neoarchean magmatic arc in the Western Liaoning Province, northern North China Craton: Geochemical and isotopic constraints from sanukitoids and associated granitoids

Zircon U-Pb Dating and Metamorphism of Granitoid Gneisses and Supracrustal Rocks in Eastern Hebei, North China Craton

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2.9 Ga magmatism in Eastern Hebei, North China Craton

Cited by 30 publications

References 51 publications

MetamorphicP‒Tpaths and Zircon U–Pb ages of Archean ultra‐high temperature paragneisses from the Qian’an gneiss dome, East Hebei terrane, North China Craton

MetamorphicP‒Tpaths and Zircon U–Pb ages of Archean ultra‐high temperature paragneisses from the Qian’an gneiss dome, East Hebei terrane, North China Craton

Neoarchean magmatic arc in the Western Liaoning Province, northern North China Craton: Geochemical and isotopic constraints from sanukitoids and associated granitoids

Zircon U-Pb Dating and Metamorphism of Granitoid Gneisses and Supracrustal Rocks in Eastern Hebei, North China Craton

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2.9 Ga magmatism in Eastern Hebei, North China Craton