Three periods of gold mineralization in the Liaodong Peninsula, North China Craton

Zhang, Peng; Kou, Linlin; Yang, Zhao

doi:10.1080/00206814.2021.2009046

Cited by 6 publications

(3 citation statements)

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“…The northern margin of the NCC is the most important gold belt in China, and many previous studies have examined the mineralization age and tectonic setting of gold deposits. The results show that gold mineralization occurred in the Permian–Triassic, Jurassic and Early Cretaceous (Li et al 2018; Zeng et al 2021; Zhang et al 2022b; Song et al 2023; Zhao et al 2023), formed during closure of the Palaeo-Asian Ocean, subduction of the Palaeo-Pacific Plate and an extensional setting associated with rollback of the Palaeo-Pacific Plate (Zhu et al 2015; Wu et al 2019), respectively. In this study, we determined that magmatism and mineralization at Jinying occurred during the Early Cretaceous, and the formation of the deposit likely occurred in an extensional setting controlled by the rollback of the Palaeo-Pacific Plate.…”

Section: Discussionmentioning

confidence: 99%

Genesis of the Jinying gold deposit, southern Jilin Province, NE China: Constraints from geochronology and isotope geochemistry

Zhang,

Wu,

et al. 2023

Geol. Mag.

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The Jinying gold deposit is located in southern Jilin Province in northeast China and is representative of the large Early Cretaceous gold deposits in this area. To better understand ore genesis of this deposit, a multi-isotope integrated analysis of U–Pb–Rb–Sr–He–Ar–S has been carried out. Laser ablation inductively coupled plasma–mass spectrometry (LA–ICP–MS) dating of zircons from the granodiorite porphyry and dioritic porphyrite in the study area yields ages of 172.1 ± 1.2 Ma and 122.5 ± 0.8 Ma, suggesting that corresponding intrusion occurred in the Middle Jurassic and the Early Cretaceous. Rb–Sr dating of the pyrite yields an isochron age of 120 ± 3 Ma, suggesting that gold mineralization occurred in the Early Cretaceous. The fluid inclusions in pyrite yield 3He/4He ratios clustered within a small range from 0.08 to 0.13 Ra, 40Ar/36Ar ratios between 331.6 and 351.3, and mantle He in the range of 1.0–1.6%, indicating that the ore-forming fluids originated from a mixed crustal and mantle source. The in situ S isotopic values of pyrite vary between + 0.1 ‰ and + 2.8 ‰, suggesting that the ore-related sulphur came from the deep magmatic source. Combined with the geological history of the study area, it can be concluded that the gold mineralization was possibly related to the extensional setting associated with the rollback of the Palaeo-Pacific Plate.

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Section: Discussionmentioning

confidence: 99%

Genesis of the Jinying gold deposit, southern Jilin Province, NE China: Constraints from geochronology and isotope geochemistry

Zhang,

Wu,

et al. 2023

Geol. Mag.

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“…The LA–ICP–MS zircon U–Pb ages for the Queshan biotite monzogranite obtained in the present study (158–153 Ma) are within the uncertainty of the results of Zhang and Zhang (2008). In addition, numerous dates have been reported for the Kunyushan (Guo et al, 2005; He et al, 2021; Zhang, 2002; Zhang et al, 2010; Zhao, Wang, Liu, Wang, & Pan, 2016) and Wendeng granitoids (Guo et al, 2005; Wang et al, 2012) that also generally agree with the dates presented in the present study, indicating that Late Jurassic granites are widespread throughout the Sulu orogenic belt in eastern Jiaodong.…”

Section: Discussionmentioning

confidence: 99%

Petrogenesis and geodynamic setting of the Late Jurassic Queshan adakitic granite, Jiaodong Peninsula, southeastern North China Craton: Zircon U–Pb geochronological, geochemical, and Lu–Hf isotopic evidence

Dang

et al. 2022

Geological Journal

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Late Mesozoic granites are present throughout the Jiaodong Peninsula in eastern China, but the petrogenesis of these granites, the magma sources, and the geodynamic setting of the magmatism remain unclear. This paper presents new zircon U–Pb geochronological and Lu–Hf isotopic and whole‐rock geochemical data for the Late Jurassic Queshan pluton in the Shandong Peninsula, an area that represents the boundary between the Jiaobei and Sulu ultrahigh‐pressure (UHP) terranes. Laser ablation–inductively coupled plasma–mass spectrometry zircon U–Pb dating yields Late Jurassic ages from 158 ± 1 to 153 ± 1 Ma for the pluton in addition to a small number of inherited zircons that yield ages that cluster at 2410, 1831–1776, 750, and 209–202 Ma. Zircons from different samples have similar 176Hf/177Hf values (0.281926–0.282255) and variably negative εHf (t) values that range from −26.5 to −15.1 (weighted mean of −22.9 ± 0.9). The corresponding two‐stage Hf model ages range from 2,869 to 2,154 Ma, with a weighted mean value of 2,645 ± 54 Ma. These data indicate that the magmas that formed the Queshan pluton were derived from multiple sources, including the lower crust of the North China (NCC) and Yangtze (YC) cratons, as well as collision‐related alkaline rocks. The whole‐rock geochemical compositions of the samples indicate that the granites are weakly peraluminous, are high‐K and calc‐alkaline with I‐type affinities, and have high contents of Sr, low contents of Y and Yb, high (La/Yb)N and Sr/Y values, and positive Eu anomalies (δEu = 1.20–1.65), indicating an adakitic affinity. This indicates that the Queshan granites formed from magmas generated by partial melting of a thickened region of the crust (>50 km) associated with eclogite, garnet amphibolite, or amphibolite residual material. The genesis of the Late Jurassic granites are also likely to have been influenced by the collisional orogeny between the NCC and YC and continued subduction of the Izanagi Plate. Thickening of the lower crust associated with this continental collisional event occurred before the magmatism, with further compression and thickening of the lower crust caused by the low‐angle subduction of the Izanagi Plate beneath northeastern China being the main geodynamic driver of the formation of the granites in this region.

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“…3; Zhu et al, 2020;Yan et al, 2021;Ren et al, 2023), accompanied by the occurrence of Cu, Mo, and decratonization-type gold deposits (Wu et al, 2021;Yan et al, 2021;Yang et al, 2021;Zhu et al, 2024). Typical gold deposits in the Wulong-Sidaogou and Xinfang regions have metallogenic ages of ca.120 Ma (Zhang et al, 2022b).…”

Section: Geological Overview Of the Jiaodong And Liaodong Peninsulas ...mentioning

confidence: 99%

Origin of the Bohai Sea, North China Craton and implication for bi-directional back-arc extension in East Asia continental margin

Chen,

Chen

2024

Preprint

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Abstract. The Bohai Sea in eastern China is located in the back-arc extensional regime due to westward subduction of the Pacific Plate underneath the Eurasian Plate. It is one of the regions with frequent earthquakes. Previous recognition of the origin of the Bohai Sea was limited by the understanding of back-arc extensional mode perpendicular to the subduction zone in eastern Asian continental margin. In this paper, a new model for the genesis of the Bohai Sea is proposed, based on the construction of major fault system and investigation of several main boundaries enclosing the Bohai Sea. Through field investigation and analyses of tectonic landforms and boundary faults on the northwest coast of the Bohai Sea and eastern and western margins of the Liaodong Peninsula, and geological correlation of the Liaodong and Jiaodong Peninsulas and surrounding areas, we revealed a left-lateral strike-slip fault between the northwest coast of the Liaodong Bay and western margin of the Liaodong Peninsula, and proposed a right-lateral strike-slip fault between the eastern margin of the Liaodong Peninsula and northwestern margin of the Jiaodong Peninsula. This mode of movement may have been resulted from the NE stretching which is parallel to the subduction zone in northwestern Pacific margin. Therefore, we suggest that the formation of the Bohai Sea is resulted from the superimposition of the NE extension parallel to the subduction zone on the NW extension perpendicular to the subduction zone. We speculate that the two-direction extension perpendicular and parallel to the subduction zone should be the basic pattern of the back-arc extension with spherical-geometric effect.

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Three periods of gold mineralization in the Liaodong Peninsula, North China Craton

Cited by 6 publications

References 64 publications

Genesis of the Jinying gold deposit, southern Jilin Province, NE China: Constraints from geochronology and isotope geochemistry

Genesis of the Jinying gold deposit, southern Jilin Province, NE China: Constraints from geochronology and isotope geochemistry

Petrogenesis and geodynamic setting of the Late Jurassic Queshan adakitic granite, Jiaodong Peninsula, southeastern North China Craton: Zircon U–Pb geochronological, geochemical, and Lu–Hf isotopic evidence

Origin of the Bohai Sea, North China Craton and implication for bi-directional back-arc extension in East Asia continental margin

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