Genesis of the Hengling magmatic belt in the North China Craton: Implications for Paleoproterozoic tectonics

Peng, Peng; Guo, Jinghui; Zhai, Mingguo; Windley, Brian F.; Li, Tiesheng; Liu, Fu

doi:10.1016/j.lithos.2012.05.021

Cited by 130 publications

(26 citation statements)

References 73 publications

(185 reference statements)

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“…1915 Ma to be the emplacement age of protolith of the Hengshan high-pressure granulites. This was argued by Peng et al [29] from zircon morphology. Zircon in Kröner et al [23] displays typical magmatic oscillatory zoning but has low Th/U ratios with an average of 0.04, very similar to zircon crystallized from anatectic melt [45,46].…”

Section: Discussionmentioning

confidence: 76%

“…Moreover, there are also zircon grains which yield ages of ca. 2.1 Ga in Kröner et al [23], corresponding to the age of weak-deformed mafic dykes in the southern Hengshan [29]. Therefore we are inclined to regard the age ca.…”

Section: Discussionmentioning

confidence: 87%

“…The weak-deformed mafic dykes are dated to have a protolith age of ca. 2.06 Ga [29] and a metamorphic age of 1.85-1.87 Ga using SHRIMP zircon U-Pb method [23,29].…”

Section: Geological Setting and Sample Descriptionsmentioning

confidence: 99%

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Reinterpretation of metamorphic age of the Hengshan Complex, North China Craton

et al. 2013

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Hengshan granulite facies terrane consists of tonalite-trondhjemite-granodiorite (TTG) gneisses and minor high-pressure mafic granulite blocks. LA-ICP-MS zircon dating for two TTG gneiss samples indicates metamorphic ages of 1916.7±9.9 Ma and 1850-1930 Ma, and magmatic protolith age of ca. 2.5 Ga, with similar HREE-rich patterns. Phase equilibria modelling in ZrO 2 -bearing system reveals that zircon abundance varies inversely with melt abundance in suprasolidus metamorphism, zircon growth occurs with melt crystallization during cooling, and thus, the newly grown zircon can only record the age of retrograde metamorphism. Consequently, we suggest that the Hengshan granulite facies terrane experienced slowly uplifting and cooling during 1.85-1.93 Ga in an extensional setting under middle-crust, while the collision orogeny corresponding to peak stage of high-pressure granulite may have happened much earlier. There are two viewpoints about tectonic attributes and evolution of the North China Craton (NCC) in the Neoarchean-Paleoproterozoic. One view argues that the NCC was cratonized by amalgamation of micro-blocks and island arcs at ca. 2.5 Ga [1][2][3][4][5], experienced a series of intra-continent orogenic events of rifting-subduction-accretion-collision from an extensional regime (2.3-2.0 Ga) to a compressional setting (2.01-1.97 Ga) during the Paleoproterozoic [4-6], and followed by high-and medium-pressure granulite facies metamorphism and uplifting during 1.95-1.82 Ga. However, it is still controversial whether the tectonic setting during 1.95-1.82 Ga was dominated by extension related to mantle upwelling [5] or by an orogenic environment of subduction and collision [4]. The other view suggests that the NCC experienced a continuous oceanic subduction since the Neoarchean, a collision between the Yinshan and Ordos Blocks forming the Western Block at ca. 1.95 Ga, and a collision between the Western and Eastern blocks at 1.80-1.89 Ga forming the Trans-North China Orogen, marking the final amalgamation of the NCC [7][8][9][10][11][12][13]. The latter view is popularly supported [14][15][16][17][18][19][20][21]. At present, the metamorphic ages 1.80-1.89 Ga obtained from the Trans-North China Orogen are mostly interpreted as record of a subduction-collision process [12][13][14][15]18,[20][21][22][23][24][25], but a few people suggest that they may represent an age of sustained extension [5]. Therefore, understanding meaning of the metamorphic ages 1.80-1.89 Ga is crucial for elucidating the Paleoproterozoic evolution of the NCC. In this paper, we present LA-ICP-MS zircon U-Pb and trace element data and P-T pseudosection modelling results for tonalite-trondhjemite-granodiorite (TTG) gneisses from the Hengshan high-pressure granulite terrane, for elucidating the behaviours of zircon and melt under granulite facies and recognizing the geological significance of zircon ages.

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 87%

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Reinterpretation of metamorphic age of the Hengshan Complex, North China Craton

et al. 2013

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“…Du et al [49] reported a SHRIMP zircon agr of 2140 ± 14 Ma for basaltic andesite from the lower part of the Hutuo Group. Peng et al [50] recognized 2147 Ma meta-mafic dykes in the Trans-North China Orogen of NCC. Wang et al [51] found 2193 Ma gabbro in the Hengshan region.…”

Section: Provenance Of the Tietonggou Formationmentioning

confidence: 99%

Early Precambrian tectonothermal events of the North China Craton: Constraints from in situ detrital zircon U-Pb, Hf and O isotopic compositions in Tietonggou Formation

et al. 2013

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Clastic sediments and sedimentary rocks are widely used for understanding the formation and evolution of the continental crust. The Tietonggou Formation outcrops in the Xiaoqinling region at the southern margin of the North China Craton (NCC) and has unconformable contacts with the underlying Taihua Complex and overlying Paleoproterozoic Xiong'er Group. It mainly consists of quartzite and its protoliths are mature terrigenous clastic rocks. On the basis of the ages of the youngest detrital zircons from the quartzites and the ages of the Xiong'er Group, the depositional ages of the protoliths of the Tietonggou Formation were well constrained to 1.91-1.80 Ga. The U-Pb isotopic data of detrital zircons from the Formation show a major age peak at ~2.1 Ga, which is consistent with 2.2-2.0 Ga magmatism in the Trans-North China Orogen of the NCC. Taking into account the texctural and compositional maturity of the Tietonggou Formation quartzite, the ~2.1 Ga lithologic units in the Trans-North China Orogen are interpreted as the major source of the Tietonggou Formation. The majority of these ~2.1 Ga detrital zircons mostly have high δ 18 O values (>6.5‰) and negative ε Hf (t) values (-7.8-0.0), with corresponding Hf model ages significantly older than their crystallization ages, indicating that these zircons formed from the partial melting of ancient continental crust. The majority of the 2.8-2.7 Ga and ~2.5 Ga detrital zircons from the Tietonggou Formation had positive ε Hf (t) values, and mantle-like δ 18 O values, suggesting that the NCC has experienced two stages of significant crustal growth in the Neoarchaean at 2.7 and 2.5 Ga, respectively. The Hf isotopic data of detrital zircons from Paleoproterozoic metasedimentary rocks in the Trans-North China Orogen varied mainly toward the reduction of the radiogenic Hf isotope and gradually show a similar trend of the isotope trajectories of crustal evolution. This reveals that the NCC probably has not developed a long-lived subduction to complete the final assembly of the NCC. Alternatively, these maybe imply that the tectonic setting of the NCC substantially changed at ~2.1 Ga, the reduction of the radiogenic Hf isotope could be attributed to the rollback of the subducting slab. North China Craton, Tietonggou Formation, detrital zircon, Hf isotope, O isotope Citation:Diwu C R, Sun Y, Gao J F, et al. Early Precambrian tectonothermal events of the North China Craton: Constraints from in situ detrital zircon

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“…Studies on mafic dykes are more useful to constrain the tectonic environment for their short life span, good capacity to preserve their original chemical characteristics and recording information regarding the chemical composition of the mantle and regional tectonic evolution (Ma et al, 2013;Peng et al, 2012;Wei et al, 2014). In this contribution, a detailed study on petrology, geochronology, geochemistry and Sr-Nd-Hf isotopes for the Zhaiwa mafic dykes in the Taihua Complex (in the southern part of the TNCO) are presented for the first time.…”

Section: Introductionmentioning

confidence: 99%