Zircon geochronology, geochemistry and stable isotopes of the Wang’ershan gold deposit, Jiaodong Peninsula, China

Li, Yujie; Li, Shengrong; Santosh, M.; Liu, Sheng‐Ao; Zhang, Long; Li, Wentao; Song, Yueqin; Wang, Bi-Xue

doi:10.1016/j.jseaes.2015.03.036

Cited by 17 publications

(5 citation statements)

References 63 publications

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“…Meanwhile, the He-Ar and Sr-Nd isotopic data prefer to a lithospheric mantle source. The 3 He/ 4 He and 40 Ar/ 36 Ar ratios reported from the Jiaodong gold ores range from 0% to 42% (average of 6%) and from 314 to 5950 (average of 1200), respectively (Shen et al, 2013;Xue et al, 2013;Li and Santosh, 2014), which are consistent with the mantlederived fluids during the gold mineralization (Li et al, 2015;Deng et al, 2020b). The widespread premineralization mafic dikes, showing typical arc-like geochemical signatures, are considered to have a metasomatized lithospheric mantle source (Deng et al, 2017).…”

Section: Source Of Ore-forming Fluids and Metallogenic Modelmentioning

confidence: 86%

The Formation of the Jiaodong Gold Province

Deng

WANG

LIU

et al. 2022

Acta Geologica Sinica (Eng)

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Gold deposits in Jiaodong, termed Jiaodong‐type, are tectonically located in the southeastern margin of the North China Craton. Their major features are reviewed in this paper to highlight the differences between Jiaodong deposits and other genetic types of gold deposits. The mineralization was synchronized with asthenosphere upwelling indicated by syn‐ore OIB‐like mafic dike and large‐scale crustal thinning suggested by decrease of Sr/Y from pre‐ore to syn‐ore granites. Asthenosphere upwelling induced by the roll‐back of Paleo‐Pacific Plate drove partial melting of lithospheric mantle and devolatilization, which induced the release of the ore‐forming fluids. In concomitant with magmatic records, mineralization migrated from the western Jiaobei terrane (133–127 Ma) to the eastern Sulu orogenic belt (114–108 Ma), corresponding to the eastward roll‐back of Paleo‐Pacific Plate. Gold mineralization in Jiaodong formed in the transitions of ductile to brittle deformation, rapid to slow crustal uplift, and regional compression to extension. In the regional‐scale, the gold deposits in the Jiaobei terrane are mostly situated at intersections between NE‐trending faults and EW‐trending basement faults, and gold orebodies dominantly controlled by the lithologic contacts between Precambrian metamorphic rocks and Mesozoic granites. The mineralization was dominated by the disseminated‐veinlet ores related to quartz–sericite alteration in strong cataclasite‐breccia zone, with subsidiary thick quartz‐sulfide veins developed in secondary fault zones. The ore‐forming fluids belong to a H2O–CO2–NaCl±CH4 system and show minor variations in salinity among different types of ore. Structure‐fluid feedback involving fluid‐rock reaction and hydrofracturing triggered the fluid phase separation and resultant gold deposition. The Jiaodong gold deposits are distinct from orogenic and intrusion‐related gold deposits in terms of tectonic setting, origin of ore‐forming fluids, and mechanism of gold deposition.

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Section: Source Of Ore-forming Fluids and Metallogenic Modelmentioning

confidence: 86%

The Formation of the Jiaodong Gold Province

Deng

WANG

LIU

et al. 2022

Acta Geologica Sinica (Eng)

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“…Furthermore, some gold deposits or occurrences were located near or hosted within the Early Cretaceous granitic plutons containing MMEs in the eastern NCC (Figure 3a) and are considered to be closely related to the plutons. In particular, the Guojialing granodiorite is believed to be associated with the Wang'ershan gold deposit in the Jiaodong area [92]. Although the studied Sanguliu granodiorite did not serve as a metallogenic intrusion of the Wulong gold deposit in the Liaodong area, the pluton shares a similar material source with the Wulong gold mineralization.…”

Section: Magma Mixing and Gold Mineralizationmentioning

confidence: 89%

The Early Cretaceous Granitoids and Microgranular Mafic Enclaves of Sanguliu Pluton, the Liaodong Peninsula: Implications for Magma Mixing and Decratonic Gold Mineralization in the Eastern North China Craton

Chen

et al. 2022

Minerals

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Some Early Cretaceous granitoids characterized by abundant mafic microgranular enclaves (MMEs) formed by magma mixing have been associated with gold deposits in the eastern North China Craton (NCC). However, the genetic connection of magma mixing with gold mineralization remains unclear. The zircon U–Pb ages and in situ Lu-Hf isotopic compositions, whole-rock major- and trace-element and Sr–Nd–Pb isotopic compositions, as well as EPMA biotite compositions, were presented for the Sanguliu granodiorite and enclaves in the Liaodong Peninsula in order to obtain insights into the spatial and temporal distribution, and internal connection of magma mixing with the decratonic gold deposits in the eastern NCC. The Sanguliu granodiorite yielded coeval formation ages with the enclaves (~123 Ma), and their acicular apatites and plagioclase megacrysts suggest that the enclaves were formed by mixing between mafic and felsic magmas. Geochemically, the Sanguliu granodiorite is high-K calc-alkaline I-type granite, with an initial 87Sr/86Sr ratio of 0.70552 to 0.71470 and strongly negative εNd(t) (−11.4 to −21.3) and zircon in situ εHf(t) values (−15.1 to −25.4), indicating that the felsic magmas were ancient lower crust with the involvement of mantle-derived materials. Meanwhile, the enclaves have high MgO (4.18 to 6.17 wt.%), Cr (45.91 to 290.04 ppm), and Ni (19.65 to 88.18 ppm) contents, with high Mg# values of 50 to 57 at intermediate SiO2 contents (53.68 to 55.78 wt.%), highly negative εNd(t) values (mostly −18.42 to −22.03), and in situ zircon εHf(t) values (−18.6 to −22.7), indicating that the mafic magma was mainly derived from the enriched lithospheric mantle. Furthermore, the biotites from the Sanguliu granodiorite clustered between the MH and NNO buffers in the Fe2+–Fe3+–Mg diagram. This, combined with the high Ce/Ce* ratios (1.30 to 107.18) of the zircons, indicates that the primary magmas forming the Sanguliu granodiorite had a high oxygen fugacity, which is favorable for gold mineralization. These findings, together with previous studies of the Early Cretaceous granitoids with enclaves in the eastern NCC, suggest that magma mixing commonly occurred during 110–130 Ma and is temporally, spatially, and genetically related to decratonic gold systems in eastern NCC.

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“…The majority of gold deposits in the Jiaodong Peninsula, especially those hosted by altered rocks, are temporally and spatially associated with NE‐trending faults (e.g., the ZFZ) and are located at the contact between Mesozoic granitoids and Precambrian basement rocks (Figure ; Charles et al, ; Charles et al, ; Deng et al, ; Deng et al, ). Muscovite from schist in the ZPF yields an 40 Ar/ 39 Ar plateau age of 134.26 ± 0.34 Ma (Lin et al, ), indicating that the Guojialing pluton was emplaced slightly later than the formation of the ZPF (Y. J. Li et al, ). Biotite from the Guojialing granodiorite yields an 40 Ar/ 39 Ar date of ca.…”

Section: Discussionmentioning

confidence: 99%

Geochronological framework of the Damoqujia gold deposit, Jiaodong Peninsula, China: Implications for the timing and geologic setting of gold mineralization

et al. 2019

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The Damoqujia gold deposit in the Jiaodong Peninsula in eastern China contains more than 60 t of gold and is hosted mainly by Mesozoic granitoids. The orebodies comprise pyrite-sericite-silica altered rocks and exhibit Jiaojia-type mineralization.Although the Damoqujia deposit is an important gold producer in the Zhaoping Fault Zone, the age and tectonic setting of metallogenesis are poorly constrained. Here, we employ precise U-Pb dating of zircon and 40 Ar/ 39 Ar dating of hydrothermal sericite from the Damoqujia gold deposit to constrain the age of mineralization, which we integrate with previous studies to understand the tectonic setting of the deposit.The major intrusions exposed in the deposit are the Jurassic monzogranite to the west and the Cretaceous granodiorite to the east. Uranium-Pb dating of zircon from the monzogranite, granodiorite, pre-ore hydrothermally altered lamprophyre dyke, and post-ore unaltered gabbro-diorite dyke yield concordia ages of 160 ± 1, 130 ± 1, 125 ± 1, and 120 ± 1 Ma, respectively. Based on these geochronological data, we suggest that the age of gold mineralization at Damuqujia occurred at 124-121 Ma.Sericite from the auriferous quartz-pyrite veinlet in the Damoqujia deposit yields a plateau age of 122.8 ± 0.9 Ma, representing the precise age of gold mineralization.Our geochronological data indicate that gold mineralization occurred at 123 Ma and are consistent with the timing of the main gold mineralization event in the Jiaobei Terrane at 125-120 Ma. The geodynamic setting of the study area during this time is generally considered to have been dominated by subduction of the Palaeo-Pacific Plate beneath the Eurasian continent, with accompanying lithospheric delamination, asthenospheric upwelling, and intense craton destruction. The gold mineralization at Damoqujia was closely associated with continental extension during the Mesozoic.

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Zircon geochronology, geochemistry and stable isotopes of the Wang’ershan gold deposit, Jiaodong Peninsula, China

Cited by 17 publications

References 63 publications

The Formation of the Jiaodong Gold Province

The Formation of the Jiaodong Gold Province

The Early Cretaceous Granitoids and Microgranular Mafic Enclaves of Sanguliu Pluton, the Liaodong Peninsula: Implications for Magma Mixing and Decratonic Gold Mineralization in the Eastern North China Craton

Geochronological framework of the Damoqujia gold deposit, Jiaodong Peninsula, China: Implications for the timing and geologic setting of gold mineralization

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