Petrogenesis and Tectonic Setting of Ore-Associated Intrusive Rocks in the Baiyinnuoer Zn–Pb Deposit, Southern Great Xing’an Range (NE China): Constraints from Zircon U–Pb Dating, Geochemistry, and Sr–Nd–Pb Isotopes

Zhao, Qing; Rong-ge, Xiao; Zhang, Dehui; Zhang, Yanfei; Li, Panpan

doi:10.3390/min10010019

Cited by 9 publications

(2 citation statements)

References 56 publications

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“…Consequently, the Bainaimiao arc belt has been regarded as a Japan-style island arc [37,49,50], Andean-type continental margin arc [20,51], or exotic terrain [42]. In addition, there is controversy about the formation age of the Bainaimiao arc, suggested to be Middle Neoproterozoic [50,52,53] or Ordovician-Silurian [32,51,54,55].…”

Section: Introductionmentioning

confidence: 99%

Middle Silurian–Middle Devonian Magmatic Rocks in the Eastern Segment of the Northern Margin of the North China Craton: Implications for Regional Tectonics

Li,

Chen,

Yang

et al. 2024

Minerals

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This paper presents a detailed study including LA-ICP-MS zircon U-Pb dating, geochemical, zircon Hf isotope, and whole rock Sr-Nd isotope analysis of magmatic rocks from the Yitong County, Jilin Province, NE China. These data are used to better constrain the Middle Silurian–Middle Devonian tectonic evolution in the eastern segment of the northern margin of the North China Craton (NCC). Zircon U-Pb dating results show that the Ximangzhang tonalite formed in the Late Silurian (425 ± 6 Ma); the basalt, andesite, and metamorphic olivine-bearing basalt in the Fangniugou volcanic rocks formed in the Middle Silurian (428 ± 6.6 Ma) and Middle Devonian (388.4 ± 3.9 Ma, and 384.1 ± 4.9 Ma). The Late Silurian tonalites are characterized by high SiO2 and Na2O and low K2O, MgO, FeOT, and TiO2, with an A/CNK ratio of 0.91–1.00, characteristic of calc-alkaline I-type granite. They are enriched in Rb, Ba, Th, U, and K, and depleted in Nb, Sr, P, and Ti, with positive εNd(t) (+0.35) and εHf(t) (+0.44 to +6.31) values, suggesting that they mainly originated from the partial melting of Meso–Neoproterozoic accretionary lower crustal material (basalt). The Middle Silurian basalts are characterized by low SiO2, P2O5, TiO2, and Na2O and high Al2O3, FeOT, and K2O, enriched in Rb, Ba, Th, U, and K and depleted in Nb, Ta, Sr, P, and Ti, indicative of shoshonitic basalt. The Late Silurian tonalites have positive εNd(t) (+4.91 to +6.18) values and primarily originated from depleted mantle magmas metasomatized by subduction fluids, supplemented by a small amount of subducted sediments and crustal materials. The Middle Devonian volcanic rocks exhibit low SiO2, TiO2, and Na2O and high K2O, and MgO, enriched in Rb, K, and LREEs and depleted in Nb, Ta, Sr, and HREEs, characteristic of shoshonitic volcanic rocks. Their εNd(t) (+2.11 to +3.77) and εHf(t) (+5.90 to +11.73) values are positive. These characteristics indicate that the Middle Devonian volcanic rocks primarily originated from depleted mantle magmas metasomatized by subduction fluids, with the addition of crustal materials or subducted sediments during their formation. Based on regional geological data, it is believed that the study area underwent the following evolutionary stages during the Silurian–Devonian period: (1) active continental margin stage of southward subduction of the Paleo–Asian Ocean (PAO) (443‒419 Ma); (2) arc-continent collision stage (419‒405 Ma); (3) post-collision extension stage (404‒375 Ma); (4) active continental margin stage, with the PAO plate subducting southward once again (375‒360 Ma).

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Section: Introductionmentioning

confidence: 99%

Middle Silurian–Middle Devonian Magmatic Rocks in the Eastern Segment of the Northern Margin of the North China Craton: Implications for Regional Tectonics

Li,

Chen,

Yang

et al. 2024

Minerals

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“…Among these deposits, Baiyinnuo'er is the largest skarn Zn-Pb deposit in this region with reserves of 32.74 Mt at average grades of 5.44% Zn, 2.02% Pb, and 31.4 g/t Ag (Zeng et al 2009;Shu et al 2013). Although many previous studies have been conducted focusing on the geology, geochemistry, geochronology, S-Pb isotopes, and fluid inclusions of the Baiyinnuo'er mineralization system (e.g., Zhang and Bao 1990;Zhang et al 1991;Zeng et al 2007Zeng et al , 2009Jia et al 2008;Niu et al 2008;Jiang et al 2011Jiang et al , 2017Shu et al 2011Shu et al , 2013Shu et al , 2017Yi et al 2012;Zhao et al 2020), the timing of the Zn-Pb mineralization remains unclear. Some authors suggested the Triassic granodiorite to be the causative intrusion of the Zn-Pb ores (e.g., Jiang et al 2011), while others believed that the mineralization occurred during the Jurassic (Wang et al 2019) or the Early Cretaceous (Zeng et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Timing of the formation of the Baiyinnuo’er skarn Zn–Pb deposit, NE China: evidence from sulfide Rb–Sr dating

Shu

Niu

et al. 2021

Acta Geochim

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The Baiyinnuo'er deposit in northern China is located in the south section of the Great Xing'an Range, and it is the largest skarn Zn-Pb deposit in the region. Skarn and Zn-Pb orebodies mainly occur between the different units of the Permian Huanggangliang Formation, or within the contact zone between the intrusive rocks and the marble. Although Baiyinnuo'er has been well investigated previously, the timing of the Zn-Pb mineralization is still controversial, largely due to the lack of appropriate ore or alteration minerals that could be directly used for isotopic dating. In this study, we report the results of Rb-Sr isotopic analysis for sphalerite and pyrite samples from the Baiyinnuo'er orebodies, which yielded two isochron ages of 137.4 ± 3.4 and 140.0 ± 7.8 Ma, respectively, constraining the Zn-Pb mineralization time of the deposit as the Early Cretaceous. The data are also consistent with the age of the granitoids in the mining area, indicating a potential genetic relationship between the Early Cretaceous magmatism and mineralization. Many other intrusion-related hydrothermal deposits (including the two typical skarns, Huanggang and Haobugao) in the southern Great Xing'an Range also share similar mineralization ages (i.e., 140-130 Ma). Together, these data suggest an Early Cretaceous mineralization event in this region, and this largescale mineralization could be related to the regional tectonic regime transition from compression to extension as a result of the rollback of the subducted Paleo-Pacific plate. The initial 87 Sr/ 86 Sr ratios of the sphalerite and pyrite samples are 0.70569 and 0.70616, respectively, implying that the ore-forming material could have a significant contribution from the mantle components. The current study shows that sulfide Rb-Sr dating could be used in deciphering the timing of skarn deposit formation.

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The superposition of Cretaceous mineralization events leading to the formation of the large Baiyinnuoer Pb–Zn deposit in NE China

Wang,

Zhao

et al. 2024

Geological Journal

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The Baiyinnuoer Pb–Zn deposit, estimated at 26.57 million metric tonnes (Mt) with grades of 1.77% Pb and 5.21% Zn, is situated in the southern Great Xing'an Range (SGXR) of northeast China. The deposit comprises southern and northern ore belts. The southern belt primarily contains skarn ore bodies (32% of reserves) associated with Triassic granodiorite, while the northern belt is dominated by skarn ore bodies (30% of reserves) related to Triassic diorite porphyry. In addition to Triassic skarn‐type mineralization, the deposit also exhibits Early Cretaceous mineralization. This includes vein‐type occurrences (36% of reserves) within volcanic tuff and syenite porphyry, alongside a small amount of skarn ore bodies (2% of reserves) related to syenite porphyry. LA‐ICP‐MS U–Pb dating of intrusive rocks and garnets was conducted to investigate the timing and genesis of these mineralization events, revealing two distinct stages of skarn‐type mineralization. The first stage, associated with Early Triassic granitoids, dates to 254.6 ± 1.4–241.7 ± 2.7 Ma, while the second stage is closely associated with Early Cretaceous syenite porphyry, constrained to 135.4 ± 1.1–135.2 ± 1.6 Ma. Garnet U–Pb dating in the syenite porphyry‐related skarn yielded an age of 134.9 ± 4.7 Ma; however, due to low U content, reliable dating of garnets associated with Early Triassic granitoid‐related skarn was not feasible. Micro‐thermometry and Laser Raman analyses of fluid inclusions within vein‐type ore bodies highlighted distinct differences between vein‐type mineralization and Early Triassic skarn‐type mineralization. Additionally, in situ sulfur isotope analyses of sphalerite from both Early Triassic and Early Cretaceous ore bodies indicate a magmatic origin for sulfur in both stages. Through comprehensive geological, geochronological, in situ sulfur isotope and fluid inclusion studies, the Baiyinnuoer Pb–Zn deposit is conclusively identified as a large deposit characterized by two distinct periods of mineralization (Early Triassic and Early Cretaceous), akin to several other significant polymetallic deposits in NE China.

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Petrogenesis and Tectonic Setting of Ore-Associated Intrusive Rocks in the Baiyinnuoer Zn–Pb Deposit, Southern Great Xing’an Range (NE China): Constraints from Zircon U–Pb Dating, Geochemistry, and Sr–Nd–Pb Isotopes

Cited by 9 publications

References 56 publications

Middle Silurian–Middle Devonian Magmatic Rocks in the Eastern Segment of the Northern Margin of the North China Craton: Implications for Regional Tectonics

Middle Silurian–Middle Devonian Magmatic Rocks in the Eastern Segment of the Northern Margin of the North China Craton: Implications for Regional Tectonics

Timing of the formation of the Baiyinnuo’er skarn Zn–Pb deposit, NE China: evidence from sulfide Rb–Sr dating

The superposition of Cretaceous mineralization events leading to the formation of the large Baiyinnuoer Pb–Zn deposit in NE China

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