Isotopic characterization and petrogenetic modeling of Early Cretaceous mafic diking—Lithospheric extension in the North China craton, eastern Asia

Deng, Jun; Liu, Xuefei; Wang, Qingfei; Dilek, Yıldırım; Liang, Yayun

doi:10.1130/b31609.1

Cited by 152 publications

(59 citation statements)

References 105 publications

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“…The range of densities of type 1 H 2 O-CO 2 inclusions was 0.516-1.017 g/cm 3 (mean 0.886 g/cm 3 ). The range of type 2 aqueous inclusions was 0.506-0.937 g/cm 3 . All in all, the density of fluid Sizhuang gold deposit ranged between 0.506 to 1.017 g/cm 3 .…”

Section: Salinity and Densitymentioning

confidence: 94%

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Ore-Fluid Evolution of the Sizhuang Orogenic Gold Deposit, Jiaodong Peninsula, China

et al. 2019

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The Sizhuang gold deposit with a proven gold resource of >120 t, located in northwest Jiaodong Peninsula in China, lies in the southern part of the Jiaojia gold belt. Gold mineralization can be divided into altered rock type, auriferous quartz vein type, and sulfide-quartz veinlet in K-feldspar altered granite. According to mineral paragenesis and mineral crosscutting relationships, three stages of metal mineralization can be identified: early stage, main stage, and late stage. Gold mainly occurs in the main stage. The petrography and microthermometry of fluid inclusion shows three types of inclusions (type 1 H2O–CO2 inclusions, type 2 aqueous inclusions, and type 3 CO2 inclusions). Early stage quartz-hosted inclusions have a trapped temperatures range 303–390 °C. The gold-rich main stage contains a fluid-inclusion cluster with both type 1 and 2 inclusions (trapped between 279 and 298 °C), and a wide range of homogenization temperatures of CO2 occurs to the vapor phase (17.6 to 30.5 °C). The late stage calcite only contains type 1 inclusions with homogenization temperatures between 195 and 289 °C. With evidences from the H–O isotope data and the study of water–rock interaction, the metamorphic water of the Jiaodong Group is considered to be the dominating source for the ore-forming fluid. The ore-fluid belonged to a CO2–H2O–NaCl system with medium-low temperature (160–360 °C), medium-low salinity (3.00–11.83 wt% NaCl eq.), and low density (1.51–1.02 g/cm3). Fluid immiscibility caused by pressure fluctuation is the key mechanism in inducing gold mineralization in the Sizhuang gold deposit.

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Section: Salinity and Densitymentioning

confidence: 94%

“…The giant Jiaodong gold deposit, with more than 4500 t proven gold reserves [1], is the most important gold producer of China [2,3]. More than 150 deposits in Jiaodong area are generally divided into two styles, Jiaojia-style and Linglong-style [4].…”

Section: Introductionmentioning

confidence: 99%

Ore-Fluid Evolution of the Sizhuang Orogenic Gold Deposit, Jiaodong Peninsula, China

et al. 2019

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“…Some examples of the different gold mineralization styles are shown in Figure . In this study, we integrate the regional studies published by Deng, Zhai, Yang, Xiao, and Sun (); Lu et al (), and Charles et al () that document pre‐gold structures, structures that were active and possibly reactivated during gold mineralization (Deng, Liu, Wang, Dilek, & Liang, ; H. Li, Geng, et al, ; L. Q. Yang, Deng, Wang, Zhang, et al, ), and post‐gold structures (Deng et al, ; Zhan & Zhu, ; R. Zhao et al, ), with other published data (Deng et al, ; S. Li et al, ; Zeng, Liu, Liu, Shen, & Zhang, ) and new data collected by the authors (R. H. Li, and this paper) in an attempt to evaluate the mechanism of concentration of these world‐class gold deposits. The extensive structural data from the sources referenced above are consolidated and reviewed in an attempt to explain the broadly E–W corridor of the larger gold deposits in the Jiaobei Uplift, which contain more than 80% of the gold resources in the Jiaodong Province, despite the general NNE‐ to NE‐trend of individual gold deposits along the major ore‐controlling faults (Figure ).…”

Section: Introductionmentioning

confidence: 95%

“…These granitoids, mainly the older suite, also host most of the major gold deposits in the Jiaobei Terrane. They were subsequently intruded by 130–110 Ma mafic to intermediate dikes (Deng et al, ; L. Li, Li et al, ) and the 118–110 Ma Aishan granitoids of both I‐type and A‐type affinities (Goss, Wilde, Wu, & Yang, ; L. Q. Yang, Deng, et al, ).…”

Section: Tectonic Settingmentioning

confidence: 99%

Regional structural control on the distribution of world‐class gold deposits: An overview from the Giant Jiaodong Gold Province, China

Deng

Yang

et al. 2018

Geological Journal

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The Jiaodong gold province in northeastern China is the country's premier gold resource and globally one of the most important gold provinces. The late Early Cretaceous gold metallogeny in this belt remains an enigma as it is hosted in the Archean Jiaobei Terrane of the North China Block and, to a lesser extent, within the Palaeoproterozoic Sulu Terrane of the South China Block.The driving force for widespread Late Jurassic and Early Cretaceous granitic magmatism, the switchover from a compressional to extensional tectonic regime, and gold mineralization are considered to be a combination of plate subduction with lithospheric delamination and consequent asthenospheric upwelling. Although many aspects related to the genesis of the gold deposits in Jiaodong have been resolved, the spatial distribution of the world-class gold deposits in this belt, which is of vital importance to brownfields and greenfields exploration, has been poorly understood in terms of the structural evolution of the province. In the northwestern segment of the Jiaobei Terrane, the world-class gold deposits of Sanshandao in the west, through Jiaojia, to Linglong in the east define a broadly E-W corridor. This corridor links a series of east-verging jogs on ore-controlling NNE-trending oblique-slip faults that are subparallel to an lithospheric-scale Tan-Lu Fault to the west. There is cryptic evidence that these jogs line up in the E-W trend due to reactivation of Palaeoproterozoic to Mesozoic faults and folds that were part of the structural architecture of the terranes prior to the gold event. These jogs induced deviations in the local principal stresses relative to regional equivalent stresses, with resultant heterogeneous strain, increased rock permeability, and focussed ore-fluid ingress. Both disseminated/ microbreccia-stockwork and vein-type gold deposits formed in this corridor, with the former being predominant and the latter having a higher gold grade. In contrast, predominant vein-type gold deposits in the eastern segment of the Jiaobei and Sulu terranes tend to form N-S corridors.These vein-type ores may relate to rotational strain induced by movement on pairs of more linear NNE-trending faults with the same kinematic movement sense.

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“…During the Late Jurassic to Cretaceous (140-90 Ma), a subducting oceanic slab rollback occurred (Figure 12b; Deng et al, 2017), triggering the upwelling of the asthenosphere and the lithospheric thinning of the eastern NCC (in particular, the thinning effect reached its climax at 130-120 Ma; e.g., Mao & Wang, 2000;Wu et al, 2003aWu et al, , 2008Y. H. Jiang et al, 2005;Zhu et al, 2011), forming a series of mafic-felsic magmatic rocks and large-scale gold mineralization (e.g., Liaodong;…”

Section: Implications For the Heterogeneous Decratonizationmentioning

confidence: 99%

Initial decratonization of the eastern North China Craton: New constraints from geochronology, geochemistry, and Hf isotopic compositions of Mesozoic igneous rocks in the Qingchengzi district

et al. 2019

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Herein, new zircon U-Pb ages, whole-rock major and trace element geochemistry, and Hf isotopes are presented for four Mesozoic granitic rock samples within the Qingchengzi district, eastern China. These data provide precise age and petrogenesis information with respect to the Mesozoic intrusions in the Qingchengzi district, which further constrain the initial decratonization process of the eastern North China Craton (NCC). The zircon U-Pb data reveal that these granitoids are emplaced in the following two stages: Triassic (243-220 Ma) and Middle Jurassic (∼164 Ma). These Mesozoic rocks (lithology: syenogranite, monzogranite, and biotite granite) contain high concentrations of silica (68.94-77.07 wt.%) and total alkali (7.35-9.71 wt.%) together with low concentrations of MgO (0.07-0.98 wt.%), total Fe 2 O 3 (0.81-2.92 wt.%), and CaO (0.17-1.80 wt.%), and they are characterized by an enrichment of large-ion lithophile elements (LILEs; e.g., Rb, Cs, and K) and light rare earth elements (LREEs)in addition to depletion of high-field-strength elements (HFSEs; e.g., Nb, Ta, and Ti) and heavy rare earth elements (HREEs), indicating that these Mesozoic rocks are similar to I-type granitoids. The ε Hf (t) values of the magmatic zircons in these granitoids range from −18.7 to −11.4. Such geochemical characteristics indicate that these granitoid formations were generated by the partial melting of the ancient lower crustal material. However, the occurrence of mafic microgranular enclaves in the Shuangdinggou monzogranite implies the mixing of the mantle-derived magmas.Combined with the results of the previous research, these new data indicate that initial decratonization of the eastern NCC occurred during the Triassic period in response to the collision and amalgamation of the Yangtze Craton and NCC. During the Jurassic, the dynamic mechanism of lithospheric thinning was overprinted owing to the subduction of the Paleo-Pacific Plate. Furthermore, cratonic destruction reached its peak during the Early Cretaceous, which could be related to the asthenospheric upwelling induced by the rollback of the subducting oceanic slab.[Correction added on 21 October 2019, after first online publication: Funding information has been added.]

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Isotopic characterization and petrogenetic modeling of Early Cretaceous mafic diking—Lithospheric extension in the North China craton, eastern Asia

Cited by 152 publications

References 105 publications

Ore-Fluid Evolution of the Sizhuang Orogenic Gold Deposit, Jiaodong Peninsula, China

Ore-Fluid Evolution of the Sizhuang Orogenic Gold Deposit, Jiaodong Peninsula, China

Regional structural control on the distribution of world‐class gold deposits: An overview from the Giant Jiaodong Gold Province, China

Initial decratonization of the eastern North China Craton: New constraints from geochronology, geochemistry, and Hf isotopic compositions of Mesozoic igneous rocks in the Qingchengzi district

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