Magmatism and metamorphism of the Early Precambrian basement in the Bayan Obo area, Inner Mongolia: Zircon SHRIMP U-Pb dating and LA-MC-ICPMS Hf analysis

董春艳,; Dong, Chunyan; 马铭株,; Ma, Mingzhu; 颉颃强,; Xie, Huixiang; 章雨旭,; Zhang, Yuxu; 万渝生,; Wan, Yusheng

doi:10.18654/1000-0569/2021.02.06

Cited by 9 publications

(4 citation statements)

References 28 publications

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“…Moreover, the Late Carboniferous–Permian period witnessed the most intense magmatic activity along the NMNCC, resulting in extensive rock formations. This period includes the development of gabbro and diorite around 330–300 Ma in the Siziwang Banner area (Zhang et al, 2004; Zhang, Liu, Han, He, & Huang, 2007; Zhang, Zhao, Song, Yang, Hu, & Wu, 2007; Zhou et al, 2009), the formation of (ultra)ferromagnesian‐diorite‐granite around 330–300 Ma in the northern Hebei region (Zhang, Zhao, & Kroner, 2009; Zhang, Zhao, & Song, 2007; Zhao et al, 2004), and the widespread occurrence of Permian diorite‐granite rock formations dating from 250–300 Ma (Jian et al, 2008; Liu et al, 2010; Wang, 2014, 2021; Zhang, Zhao, & Liu, 2009). These magmatic rocks constitute the primary source materials for the sedimentary strata.…”

Section: Discussionmentioning

confidence: 99%

Detrital zircon U–Pb geochronology and geochemistry of sandstones in the Siziwang Banner, Central Inner Mongolia: Implication for tectonic evolution

Gao,

Li,

Liu

et al. 2024

Geological Journal

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The central Inner Mongolia, located at the intersection of the northern margin of the North China Craton (NCC) and the Central Asian Orogenic Belt, is crucial for deciphering the Late Palaeozoic tectonic evolution associated with the subduction and closure of the Palaeo‐Asian Ocean (PAO). Our study focused on petrology, detrital zircon LA–ICP–MS U–Pb geochronology and whole‐rock geochemistry for the Late Carboniferous to Permian sandstones within the Shuanmazhuang, Dahongshan, Naobaogou, and Laowopu formations in Siziwang Banner, central Inner Mongolia. This comprehensive analysis shed light on the dynamic interplay between the NCC and the South Mongolia Block. Detrital zircon U–Pb ages in investigated samples mainly cluster between 250 and 2650 Ma, with significant peaks at 2.4–2.5 Ga, 1.8–2.0 Ga, 400–430 Ma, and 250–320 Ma, respectively. The geochemistry data are characterized by SiO2 contents (56.29–77.95 wt. %), Na2O / K2O ratios (0.45–1.58) and SiO2/Al2O3 ratios between 4.33 and 7.44. Moreover, they exhibit the slight enrichment in large ion lithophile elements (Rb and Ba) and the depletion in high field strength elements (Nb, Ta, Th, and U). These facts indicate that the sedimentary detritus predominantly originates from felsic sources, probably deriving from the Late Carboniferous–Permian continental island arc‐related intermediate‐acid igneous rocks, the Late Ordovician‐Silurian magmatic rocks in the Bainaimiao arc and the basements of the NCC. Furthermore, our present results also suggest that during the Early–Middle Permian, accelerating oceanic crust subduction triggered significant magmatic events in Siziwang Banner, leading to rapid uplift and the erosion of arc magmatic rocks, as well as the abundant corresponding sediments. Subsequently, the gradual convergence and eventual collision between the NCC and the Southern Mongolian Block took place at the end of the Permian, representing final closure of the PAO.

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Section: Discussionmentioning

confidence: 99%

Detrital zircon U–Pb geochronology and geochemistry of sandstones in the Siziwang Banner, Central Inner Mongolia: Implication for tectonic evolution

Gao,

Li,

Liu

et al. 2024

Geological Journal

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“…2017; Dong et al . 2021). In these late Neoarchaean gneisses, there are local middle to late Palaeoproterozoic plutonic rocks (Liu, J. H. et al .…”

Section: Discussionmentioning

confidence: 99%

“…1) where the late Palaeoproterozoic tectonothermal events were relatively weak, with most of the late Neoarchaean meta-plutonic rocks having magmatic zircon ages >2500 Ma (e.g. Jian et al 2012;Ma et al 2013;Liu, J. H. et al 2017;Dong et al 2021). In these late Neoarchaean gneisses, there are local middle to late Palaeoproterozoic plutonic rocks (Liu, J. H. et al 2013;Liu, S. J. et al 2013;Wan et al 2013;Liu et al 2014).…”

Section: B Whole-rock Nd Isotopesmentioning

confidence: 99%

Establishing the occurrence of late Neoarchaean – earliest Palaeoproterozoic magmatism in the Daqingshan area, northwestern North China Craton: SIMS U–Pb zircon dating, Lu–Hf and Sm–Nd isotopes and whole-rock geochemistry

Dong

Wilde

et al. 2023

Geol. Mag.

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Daqingshan is located in the northwestern North China Craton where late Neoarchaean supracrustal rocks occur widely, but where magmatic zircon ages have rarely been reported for plutonic rocks. In this study, we report SIMS U–Pb zircon ages and Hf isotope, whole-rock element and Nd isotope compositions for 12 magmatic samples, including TTG, quartz monzonitic and monzogranitic gneisses, and meta-gabbroic and dioritic rocks. They have magmatic zircon ages of 2530–2469 Ma; some samples have ages of <2.48 Ga likely influenced by late Palaeoproterozoic tectonothermal events, making their ages less reliable. TTG gneisses have low Sr/Y and La/Yb ratios, with whole-rock ϵNd(t) and in situ magmatic zircon ϵHf(t) values of +1.2 to +2.4 and −1.1 to +6.2, respectively. Quartz monzonite and monzogranite gneisses and gabbroic to dioritic rocks have similar Nd–Hf isotope compositions to the TTG gneisses. The absence of zircon >2.6 Ga in the early Precambrian rocks suggests that the Sanggan Group may have formed in an oceanic environment, whereas the TTG rocks formed as a result of partial melting of the basaltic rocks of the Sanggan Group under relatively low-pressure conditions. Combined with previous studies, the main conclusions are that in the Daqingshan area, late Neoarchaean magmatism was widespread, the late Mesoarchaean – early Neoarchaean was an important period of juvenile continental crustal growth, and the late Neoarchaean supracrustal and plutonic rocks most likely formed in an arc environment. These are common signatures for Neoarchaean crustal evolution throughout much of the North China Craton, and also globally.

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“…Bayan Obo is also the second largest niobium (Nb) deposit in the world. Table I shows the typical chemical composition of the ore. More than 80% of the light REE resources in China are distributed in the Bayan Obo region, Inner Mongolia, Northern China (Wu et al, 1996;Fan et al, 2010).…”

Section: Bayan Obo Ree−fe−nb Depositmentioning

confidence: 99%

Development and beneficiation technology of rare earth ores in China

Chen

Potgieter

2022

J. S. Afr. Inst. Min. Metall.

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The demand for rare earth elements (REE) is increasing rapidly owing to the emergence of new clean-energy and defense-related technologies. China's dominates the world production of REE. In this paper, we review the ore characteristics of four typical REE deposits in China and discuss the conventional beneficiation techniques, including gravity and magnetic separation, flotation, and hydrometallurgical processing of these ores. Some of the latest laboratory findings and industrial applications, as well as the development of novel reagents for REE processing in China are presented. The REE beneficiation technologies developed and employed in China could constitute a good case study for many other emerging projects being explored around the world.

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Magmatism and metamorphism of the Early Precambrian basement in the Bayan Obo area, Inner Mongolia: Zircon SHRIMP U-Pb dating and LA-MC-ICPMS Hf analysis

Cited by 9 publications

References 28 publications

Detrital zircon U–Pb geochronology and geochemistry of sandstones in the Siziwang Banner, Central Inner Mongolia: Implication for tectonic evolution

Detrital zircon U–Pb geochronology and geochemistry of sandstones in the Siziwang Banner, Central Inner Mongolia: Implication for tectonic evolution

Establishing the occurrence of late Neoarchaean – earliest Palaeoproterozoic magmatism in the Daqingshan area, northwestern North China Craton: SIMS U–Pb zircon dating, Lu–Hf and Sm–Nd isotopes and whole-rock geochemistry

Development and beneficiation technology of rare earth ores in China

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