Re–Os ages for molybdenum mineralization in the Fengning region of northern Hebei Province, China: New constraints on the timing of mineralization and geodynamic setting

Sihong, Jiang; Qingling, Liang; Bagas, Leon

doi:10.1016/j.jseaes.2013.03.014

Cited by 27 publications

(31 citation statements)

References 26 publications

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“…(a) Tectonic subdivision of the NCC (adapted from Zhao, Sun, Wilde, & Li, ); ECB, Eastern Block; TNCO, Trans‐North China Orogen; WCB, Western Block. (b) Distribution of major molybdenum deposits in the northern margin of the NCC (adapted from Dai et al, ; Jiang, Liang, & Bagas, ; G. R. Wang et al, ); (c) Geological map of the Jining area, Inner Mongolia (adapted from Xu, Chen, Wang, Chen, & Li, ; G. R. Wang et al, ) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Introductionmentioning

confidence: 99%

The formation of the Caosiyao giant porphyry Mo deposit on the northern margin of the North China Craton: Constraints from U―Pb and Re―Os geochronology, whole‐rock geochemistry, Hf isotopes, and oxygen fugacity of the magma

et al. 2018

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The Caosiyao giant porphyry Mo deposit (1.76 Mt), which is the third largest such deposit in China, is located on the northern margin of the North China Craton and associated with the Caosiyao intrusive complex that was emplaced in Archaean metamorphic rocks. The intrusive complex consists of monzogranite and coarse‐, medium‐, and fine‐grained granite porphyries that yield U―Pb ages of 148.5 ± 1.2, 146.4 ± 1.0, 144.6 ± 1.0, and 142.8 ± 3.2 Ma, respectively. Four molybdenite Re―Os model ages range from 143.1 ± 2.4 to 145.3 ± 2.1 Ma, which are consistent with the U―Pb ages for the igneous complex. The geochronological data indicate that the multistage magmatic‐hydrothermal processes were important in the formation of the Caosiyao giant deposit. The rocks of the Caosiyao granitic complex have high contents of silica (SiO2 = 71.7–75.6 wt.%) and total alkalis (mostly K2O + Na2O > 8 wt.%), low contents of CaO and MgO, and exhibit peraluminous high‐K calc‐alkaline to shoshonitic affinities. They are enriched in large‐ion lithophile elements (e.g., K, Rb, U, and Th) and light REEs and depleted in Eu, Ba, Sr, Nb, P, and Ti. The geochemical characteristics indicate advanced fractional crystallization and that the rocks are strongly fractionated I‐type granites. The negative Hf isotopic compositions of the granitic rocks, combined with old two‐stage Hf model ages, indicate the magmas were derived from partial melting of the ancient lower crust of the North China Craton. All the intrusive rocks in the complex have relatively high Ce4+/Ce3+ ratios and oxygen fugacity, which would have facilitated Mo extraction into the melts owing to the much higher solubility of S as sulphate (SO42−) than sulphide (S2−). The magma crystallization temperatures decreased from 882°C to 770°C as the magma evolved. The multistage magmatic‐hydrothermal processes, and the prolonged fractional crystallization, combined with high magma oxygen fugacity are the key factors to form the Caosiyao giant Mo deposit. The tectonic setting of deposit formation was one of extension related to rollback of the subducting Palaeo‐Pacific Plate during the Late Jurassic to Early Cretaceous.

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Section: Introductionmentioning

confidence: 99%

The formation of the Caosiyao giant porphyry Mo deposit on the northern margin of the North China Craton: Constraints from U―Pb and Re―Os geochronology, whole‐rock geochemistry, Hf isotopes, and oxygen fugacity of the magma

et al. 2018

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“…Large‐scale diagenesis and mineralization occurred during the Triassic–Cretaceous. This region's unique geological background and abundant mineral resources have attracted the attention of many scholars (Chen, Zhang, Wang, Pirajno, & Li, ; Dai et al, ; Huang et al, ; Jiang, Liang, & Bagas, ; Nie, Zhang, Du, Jiang, & Liu, ; Pirajno & Zhou, ; Qing et al, ; Wang et al, ; Wu et al, Zeng, Liu, Qin, & Zhang, ; Zeng, Liu, et al, ; Zeng, Yang, et al, ). In recent years, an east–west giant molybdenum ore belt was discovered along the northern margin of the NCC (Chen et al, ; Nie et al, ; Wu, Zhang, Chen, & Wan, ; Zeng et al, ; Zhang et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, an east–west giant molybdenum ore belt was discovered along the northern margin of the NCC (Chen et al, ; Nie et al, ; Wu, Zhang, Chen, & Wan, ; Zeng et al, ; Zhang et al, ). The molybdenum deposits in this metallogenic belt are mainly porphyry, quartz vein, skarn, volcanic, subvolcanic, hydrothermal, and greisen materials (Jiang et al, ; Zeng et al, ) and are mostly related to Mesozoic acidic intrusive rocks (Nie et al, ; Wu et al, ; Zeng et al, ; Zeng, Liu, Chu, et al, ; Zeng, Liu, Zhang, et al, ; Figure 1, Table ). The metallogenic epoch is mainly concentrated in the Indosinian and Yanshanian epochs and has the characteristics of multistage mineralization (Jiang et al, ; Mao, Wang, Zhang, Yu, & Niu, ; Pirajno & Zhou, ; Zeng et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…Guo et al () documented three Re–Os model ages of 147 ± 2, 137 ± 3, and 136 ± 2 Ma for the Dacaoping deposit. Jiang et al () reported a Re–Os molybdenite isochron age of 140.1 ± 3.4 Ma for the Dacaoping deposit and a Re–Os molybdenite isochron age of 236.5 ± 2.2 Ma for the Sadaigoumen deposit. Shen () reported two Re–Os model ages of 238 ± 4 and 237 ± 4 Ma for the Sadaigoumen deposit.…”

Section: Introductionmentioning

confidence: 99%

“…These data show a large range of molybdenite ages in the Dacaoping and Sadaigoumen deposits, from 149 to 134 Ma and from 248 to 236 Ma, respectively. Some scholars believe that these data are worth considering (Jiang et al, ). Coincidentally, the zircon U–Pb ages of granites in the mining area also exhibit large variations (240 to 220 Ma and 140 to 134 Ma).…”

Section: Introductionmentioning

confidence: 99%

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Geochemistry, zircon U–Pb, and molybdenite Re–Os geochronology of the Mo deposit in Fengning region, Hebei Province, China

Sun

Wang

et al. 2018

Geological Journal

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The Dacaoping and Sadaigoumen Mo deposits were recently discovered along the northern margin of the North China Craton. The newly determined Re–Os isochronous age of molybdenite from the Dacaoping Mo deposit is ca. 147 Ma, and the Re–Os model age of molybdenite from the Sadaigoumen Mo deposit is ca. 248 Ma, which represents two of their respective mineralization stages. Combined with previous data, we suggest four phases of mineralization in the Dacaoping and Sabagaogoumen Mo deposits; these phases are 248, 236, 147, and 140 Ma. The Early Triassic monzogranite and Early Cretaceous granodiorite in the Dacaoping Mo deposit and the Middle Triassic monzogranite in the Sabagaogoumen Mo deposit are I‐type granite with similar geochemical characteristics. The Triassic granites formed in a collisional–post‐collisional setting between the North China Plate and the Siberian Plate, and the Cretaceous granodiorite formed from the rapid thinning of the lithosphere. The partial melting of the lower crust is the main reason for their formation, and small amounts of mantle‐derived components were added. Compared to other Mo deposits in the region, we can further divide these Mo deposits into three phases, namely, (a) Triassic (ca. 248–223 Ma), (b) Early–Middle Jurassic (ca. 187–165 Ma), and (c) Late Jurassic–Early Cretaceous (ca. 155–130 Ma), which are consistent with the times of magmatic activity. These activities occurred during the collision and post‐collision between the North China Plate and the Siberian Plate after the Paleo‐Asian Ocean's closure, intracontinental orogeny, and rapid thinning of the lithosphere, respectively.

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A 2D seismic reflection dataset of the Caosiyao giant porphyry Mo deposit in the shallow coverage area in Jining, Inner Mongolia, China

Lin,

Zhang,

Yang

et al. 2023

Geoscience Data Journal

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Prospecting for and exploiting buried mineral deposits is currently challenging. Given their high precision and resolution, reflection seismic methods might be useful in such applications involving deep mineral deposits. However, there are few open seismic datasets available from mineral deposit exploration, especially in hardrock environments. The world‐class Caosiyao porphyry Molybdenum deposit (1.76 Mt) in the Jining area of Inner Mongolia, China, is largely covered by loess layers, which poses challenges to its exploration. Seismic reflection surveys were conducted in to help delineate the deep granite porphyry intrusions and associated orebodies. This paper presents the raw seismic reflection dataset from three profiles on the Caosiyao deposit area, which can be used as a standard dataset for reflection seismic processing in shallow coverage and hardrock areas. Situated at the juxtaposition of the Khondalite Belt and the Trans‐North China Orogen in the northern North China Craton, the Jining region hosts considerable known porphyry Mo deposits. As such, this open dataset can assist research on deep geological structures and hence increase prospecting efficiency in geologically similar areas.

show abstract

Re–Os ages for molybdenum mineralization in the Fengning region of northern Hebei Province, China: New constraints on the timing of mineralization and geodynamic setting

Cited by 27 publications

References 26 publications

The formation of the Caosiyao giant porphyry Mo deposit on the northern margin of the North China Craton: Constraints from U―Pb and Re―Os geochronology, whole‐rock geochemistry, Hf isotopes, and oxygen fugacity of the magma

The formation of the Caosiyao giant porphyry Mo deposit on the northern margin of the North China Craton: Constraints from U―Pb and Re―Os geochronology, whole‐rock geochemistry, Hf isotopes, and oxygen fugacity of the magma

Geochemistry, zircon U–Pb, and molybdenite Re–Os geochronology of the Mo deposit in Fengning region, Hebei Province, China

A 2D seismic reflection dataset of the Caosiyao giant porphyry Mo deposit in the shallow coverage area in Jining, Inner Mongolia, China

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