Anatomy of zircon growth in high pressure granulites: SIMS U–Pb geochronology and Lu–Hf isotopes from the Jiaobei Terrane, eastern North China Craton

Zhao, Lei; Li, Tiesheng; Peng, Peng; Guo, Jinghui; Wang, Wei; Wang, Haozheng; Santosh, M.; Zhai, Mingguo

doi:10.1016/j.gr.2014.10.009

Cited by 75 publications

(22 citation statements)

References 115 publications

(192 reference statements)

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“…Geochemical characteristics and the core-mantle-rim structure of zircon in charnockite further constrain metamorphic anatexis. Extensive U-Pb zircon geochronology studies have assessed the morphology, internal structure, and Th/U ratio of zircon in various rocks (Geisler, Schaltegger, & Tomaschek, 2007;Hoskin & Schaltegger, 2003;Rubatto, 2002;Rubatto, Gebauer, & Compagnoni, 1999;Zhao et al, 2015), which aid in our understanding of the origin of zircon and the geological significance of U-Pb zircon chronology. The two concordant U-Pb analyses of fuzzy mantle oscillatory-zoned zircons yielded a weighted mean 207 Pb/ 206 Pb age of 2,474 ± 15 Ma (Figure 6a), which is likely to represent the diagenetic age of intermediate charnockite.…”

Section: Timing Of Metamorphic Anatexis Of Jining Charnockitementioning

confidence: 99%

Anatectic origin and geological significance of the Neoarchean ~2.5 Ga charnockite in the Jining area, northern North China Craton

et al. 2019

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The Neoarchean charnockite of Yinshan Block has been a hot topic into understanding the Precambrian geology of the North China Craton. Although there is a broad consensus that the charnockite is usually related to granulite‐facies metamorphism, its petrogenesis and tectonics still remain controversial. We present a comparative study of the petrography, geochemistry, and geochronology of charnockite and intermediate–basic granulite in the Jining area along the northern margin of the North China Craton. Inclusions within hypersthene in charnockite are used to identify the peak granulite facies mineral assemblage, with the formation of charnockite being attributed to anatexis of the protolith associated with this granulite‐facies metamorphism. Anatexis occurred mainly during postpeak isothermal decompression, as inferred from the metamorphic evolution and pressure–temperature conditions (granulite and charnockite record peak pressure–temperature conditions of 750°C–1,000°C and 0.8–1.2 GPa and 850°C–975°C and 0.9–1.0 GPa, respectively) derived from analyses of metamorphic minerals using electron probe microanalysis, combined with previous zircon geochronology. Hypersthene in charnockite is interpreted to be a residual or peritectic mineral phase that was present during anatexis, and the charnockite is inferred to have been crystallized from a melt containing abundant residual minerals. Charnockite has similar geochemical characteristics to those of intermediate–basic granulite but differs in several key ways: (a) The charnockite is strongly depleted in the large‐ion lithophile element Cs, the heat‐producing elements U and Th, and the high‐field‐strength elements Nb, Ta, P, and Ti; (b) it is enriched in Sr; and (c) it exhibits both positive and negative Eu anomalies, which are characteristics of granites formed largely by in situ anatexis. Geochemical constraints indicate that the intermediate charnockite and retrograde metamorphic biotite–hornblende gneiss may both be the product of mantle‐derived magma in a magmatic subduction‐related back‐arc extensional environment. This setting provided a hot spot for metamorphic anatexis, with additional heat being provided by the upwelling of asthenospheric mantle. After the cessation of subduction by ~2,470 Ma, a magmatic arc extensional setting developed in the Jining area. The charnockite was involved in Paleoproterozoic orogenesis in the North China Craton and was strongly modified by a ~1,950‐Ma metamorphism event.

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Section: Timing Of Metamorphic Anatexis Of Jining Charnockitementioning

confidence: 99%

Anatectic origin and geological significance of the Neoarchean ~2.5 Ga charnockite in the Jining area, northern North China Craton

et al. 2019

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“…Complex textures and U-Pb zircon ages in high-grade metamorphic rocks can result from multiple episodes of recrystallization, presence of a melt, solid-state processes and fluids, among others (Corfu et al, 2003;Kröner et al, 2014;Zhao et al, 2015).…”

Section: Paleo-and Neoproterozoic Reworking Of Archean Crustmentioning

confidence: 99%

“…On the other hand, ages recorded in mafic granulites (weighted mean 207 Pb/ 206 Pb ages of 2095 ± 15 Ma and 2041 ± 24 Ma, BUY-54-11) and mesocratic gneisses (concordia age of 2087.0 ± 7.3 Ma, BUY-57-11) show more complex textures, including homogeneous cores rims, evidences of dissolution-precipation and anhedral crystals with rounded boundaries, particularly in the case of BUY-57-11. These textures could indicate that these zircons record high-grade metamorphism (Corfu et al, 2003;Zhao et al, 2015), although the presence of prismatic zircon crystals with oscillatory zoning and Th/U > 0.1 may indicate a magmatic origin (Hoskin and Schaltegger, 2003, and references therein). However, Th/U > 0.1 were also reported for zircons in high-grade metamorphic rocks (Santosh et al, 2007;Zhang et al, 2016).…”

Section: Paleo-and Neoproterozoic Reworking Of Archean Crustmentioning

confidence: 99%

The Nico Pérez Terrane (Uruguay): From Archean crustal growth and connections with the Congo Craton to late Neoproterozoic accretion to the Río de la Plata Craton

Oriolo

Oyhantçabal

Basei

et al. 2016

Precambrian Research

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“…The high-pressure granulites were first discovered in the Huai'an-Xuanhua region, and then, similar rocks have been illustrated in the Hengshan, Fuping, Zanhuang, Qianlishan-Helanshan, and Jiaobei regions (Figs. 1 and 2; Zhai et al 1992Zhai et al , 1996Guo et al 1993Guo et al , 2001Guo et al , 2005Li and Qian, 1994;Liu et al 1998Liu et al , 2006Liu et al , 2013Zhao et al 2000Zhao et al , 2005Zhao et al , 2014O'Brien et al 2005;Yin et al 2009Yin et al , 2014Zhou et al 2010;Xiao et al 2010Xiao et al , 2013Tam et al 2012a, b). The existence of high-pressure granulite in the craton has led to an extensive discussion on its tectonic implications, and one debate is whether the genesis of these rocks was similar to those exposure in the Phanerozoic orogens.…”

Section: Distribution Of the Paleoproterozoic Granulites In The Northmentioning

confidence: 99%

“…Similar P-T paths for the Liu et al (2013) mafic and politic granulites have been reconstructed; they are clockwise with an isobaric cooling stage following earlier isothermal decompression stage (Liu et al 1998(Liu et al , 2013Zhou et al 2004;Tam et al 2012a, b). Metamorphic ages range from 1960 to 1790 Ma have been reported in the region (Zhou et al 2008;Tam et al 2011;Liu et al 2013;Zhao et al 2014), though it is unclear whether these ages refer to a single metamorphic event or not.…”

Section: Jiaobei Regionmentioning

confidence: 99%

Paleoproterozoic Granulites in the North China Craton and Their Geological Implications

Guo

Zhai

Peng

et al. 2015

Precambrian Geology of China

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It is well known that there are widespread Paleoproterozoic high-grade rocks, mainly garnet amphibolites and granulites, in the North China Craton. The granulites could be classified into two types, the high-pressure granulites and (ultra-) high-temperature granulites. The high-pressure granulites mainly distribute in the Huai'an-Xuanhua, Hengshan, Fuping, Zanhuang, Qianlishan-Helanshan, and Jiaobei regions (the central and east of the craton), while the (ultra-)high-temperature granulites distribute mainly in the Liangcheng-Jining-Zhuozi and the Daqingshan regions (west of the northern margin of the craton). Nevertheless, (ultra-) high-temperature granulites have been also discovered in northeast Hebei, north Henan, Shandong and Liaoning provinces, and the Korean peninsula, and some drilling cores from under the Ordos basin, though some of them might be formed in the Late Archean. The Paleoproterozoic high-grade metamorphism has partly overprinted on the Late Archean low-to high-grade rocks. Both types of granulites have recorded clockwise P-T paths, which might indicate a process similar to those happened in the Phanerozoic orogenic belts. In the past 20-30 years, several different tectonic models have been introduced to interpret the environments of the Paleoproterozoic granulites in the North China Craton. However, there are several things need to be clarified before any conclusion, e.g., (1) the distribution of the different types of high-grade rocks; (2) the relationship between the high-pressure granulites and the (ultra-)high-temperature granulites; and (3) the exhumation rate and genetic mechanism of these rocks. These Paleoproterozoic high-grade rocks in the North China Craton are more complex than any high-grade rocks in the Phanerozoic orogens, and await further study.

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Anatomy of zircon growth in high pressure granulites: SIMS U–Pb geochronology and Lu–Hf isotopes from the Jiaobei Terrane, eastern North China Craton

Cited by 75 publications

References 115 publications

Anatectic origin and geological significance of the Neoarchean ~2.5 Ga charnockite in the Jining area, northern North China Craton

Anatectic origin and geological significance of the Neoarchean ~2.5 Ga charnockite in the Jining area, northern North China Craton

The Nico Pérez Terrane (Uruguay): From Archean crustal growth and connections with the Congo Craton to late Neoproterozoic accretion to the Río de la Plata Craton

Paleoproterozoic Granulites in the North China Craton and Their Geological Implications

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