Geodynamic setting and ore formation of the Younusisayi thorium deposit in the Altyn orogenic belt, NW China

Huang, Ya‐Qi; Wu, Mingqian; Bishikwabo, Germain; Yu, Hao‐Cheng; Qiao, Bao-Xing; Zhao, Zhigang; Qiu, Kaibin

doi:10.1016/j.oregeorev.2021.104552

Cited by 8 publications

(6 citation statements)

References 59 publications

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“…Formation times of granites and granitic pegmatite Li-Be deposits in the CAB. The granite ages of the NAB are from [90][91][92][93][94][95][96][97][98][99][100][101]; the granite ages of the CAB are from [46][47][48]60,62,[88][89][90][102][103][104][105]. Igneous crystallization and mineralization ages of Li-Be deposits are consistent with the literature in Figure 1.…”

Section: Formation Times Of the Tashitaban LI Granitic Pegmatitessupporting

confidence: 73%

Geochronology and Geochemistry of Granitic Pegmatites from Tashidaban Li Deposit in the Central Altun Tagh, Northwest China

Kang,

Ma,

Zhang

et al. 2024

Minerals

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The Central Altun orogenic system is a result of the amalgamation of multiple micro-continental blocks and island arcs. This complex system originated from subduction–accretion–collision processes in the Proto-Tethys Ocean during the Early Paleozoic. Research has reported the discovery of several Li-Be granitic pegmatite deposits in the Central Altun Block, including the North Tugeman granitic pegmatite Li-Be deposit, Tugeman granitic pegmatite Be deposit, Tashisayi granitic pegmatite Li deposit, South Washixia granitic pegmatite Li deposit, and Tamuqie granitic pegmatite Li deposit. The Tashidaban granitic pegmatite Li deposit has been newly discovered along the northern margin of the Central Altun Block. Field and geochemical studies of the Tashidaban granitic pegmatite Li deposit indicate: (1) Spodumene pegmatites and elbaite pegmatites, as Li-bearing granitic pegmatites that form the Tashidaban granitic pegmatite Li deposit, intrude into the two-mica schist, and marble of the Muzisayi Formation of the Tashidaban Group. (2) Columbite–tantalite group minerals and zircon U-Pb dating results indicate that the mineralization age of Tashidaban Li granitic pegmatites is 450.2 ± 2.4 Ma with a superimposed magmatic event at around 418–422 Ma later. (3) Whole-rock geochemical results indicate that the Kumudaban rock sequence belongs to the S-type high-K to calc-alkaline granites and the Tashidaban Li granitic pegmatites originated from the extreme differentiation by fractional crystallization of the Kumdaban granite pluton.

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Section: Formation Times Of the Tashitaban LI Granitic Pegmatitessupporting

confidence: 73%

Geochronology and Geochemistry of Granitic Pegmatites from Tashidaban Li Deposit in the Central Altun Tagh, Northwest China

Kang,

Ma,

Zhang

et al. 2024

Minerals

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“…The intensive Late Jurassic-Early Cretaceous magmatic activity also resulted in the emplacement of some granitoids in the form of small hypabyssal intrusions, such as the Xiaohekou, Lengshuigou, and Chigou granitic stocks in Zhashui-Shanyang area [63][64][65][66]. The Xiajiadian, Wangjiaping, and other Carlin gold deposits are 50 km away from the porphyry skarn Cu-Mo deposits, such as Chigou and Lengshuigou in Zhashui-Shanyang area [67][68][69][70][71][72]. These ages (150-145 Ma) of the Chigou and Lengshuigou Cu-Mo deposits in the Zhashui-Shanyang district are consistent with the dolomite Sm-Nd age of 139.6 ± 0.98 Ma, which represents the age of Au mineralization in Xiajiadian Carlin-type Au deposit.…”

Section: Source Of the Granitoid Stocks And Its Implicationsmentioning

confidence: 99%

Geochronology and Geochemistry of the Granite Porphyry from the Qinglingou Gold Deposit, South Qinling, China: Implication for Petrogenesis and Mineralization

et al. 2022

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The Zhashui-Shanyang ore cluster area is one of the most important gold polymetallic ones in northwestern China. The Qinglingou gold deposit is a newly discovered small-scale deposit in the Zhashui-Shanyang area. Gold mineralization closely related to acid intrusive rocks has been found for the first time in this area. In this paper, the geochronology, whole-rock geochemistry, and isotope signature of the granite porphyries in the deposit are studied. They are characterized by variable medium SiO2 (67.22–71.72 wt.%), high K2O + Na2O contents (6.54–10.34 wt.%), and variable Al2O3 (14.47–15.10 wt.%) values. The A/CNK ratios range from 0.90 to 1.23, and the A/NK ratios vary from 1.14 to 1.48. These rocks also contain biotite and amphiboles and are similar to peraluminous and high-K calc-alkaline I-type granites. The Qinglingou granite porphyries show relative enrichment of Rb, Th, and K, and depletion of Nb, Ta, P, Ti, and other high field strength elements. These porphyries are enriched in light rare earth elements relative to heavy rare earth elements with weak negative Eu anomalies (δEu = 0.63–0.89), which is interpreted to be the best age of crystallization of the Qinglingou porphyries. LA–ICPMS zircon U–Pb dating yields an age of 211 ± 1.2 Ma (n=16, MSWD=0.39). The close spatial relationship between the ore bodies and granite porphyry dikes indicates that this age may represent the metallogenic age in this area. The zircons have 176Hf/177Hf ratios ranging from 0.282625 to 0.282702, the εHf(t) values are near 0 and the two-stage zircon Hf model ages range from 1121 to 1296 Ma. These data indicate that the Qinglingou granite porphyries were derived from the interplay between mantle- and crustal-derived magmas. We therefore propose that there is potential gold in carbonate rocks at the periphery of porphyry-skarn copper-molybdenum deposits.

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“…The crystallization ages of the alkaline rocks from the Luxi Terrane are in the range of 122-131 Ma, corresponding to the peak time of lithospheric destruction of the NCB (120-130 Ma) [54,55]. In addition, the lithospheric destruction mainly occurred in eastern NCB due to the subduction of the Izanagi plate during the Early Cretaceous [42,[56][57][58][59][60][61][62][63][64][65][66][67][68]. Hence, the subducting Izanagi plate during the Late Mesozoic may have played an important role in the lithospheric destruction of the NCB.…”

Section: Tectonic Implicationsmentioning

confidence: 99%

“…The Izanagi plate subducted beneath the NCB during the Jurassic, resulting in the thickening of the lower crust [60][61][62]. Asthenosphere upwelling and partial melting of the lithospheric mantle were caused by the rollback of the subducting Izanagi plate during the Early Cretaceous [59,[62][63][64][65][66].…”

Section: Tectonic Implicationsmentioning

confidence: 99%

Partial Melting of Lithospheric Mantle and Formation of the Early Cretaceous Alkaline Rocks in the Guandimiao REE Deposit, Luxi Terrane, Eastern China

Qiu

Zhi

et al. 2022

Minerals

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The Luxi Terrane (eastern China) exposes widespread Early Cretaceous alkaline rocks, whereas their petrogenesis remains controversial, including fractional crystallization, partial melting and crustal contamination regime. Here, we present petrology, geochemistry, sphene U-Pb geochronology and trace element data from the syenogranite, quartz syenite and quartz monzonite of the Guandimiao alkaline complex rocks to investigate their petrogenesis. Geochemical data suggest that these alkaline rocks show alkalic and peralkaline characters, and high Ga/Al ratios, SiO2, light rare-earth element (LREE), Zr and Nb, and low MgO, CaO, Eu contents, corresponding to A-type granites. Sphene trace elements in syenogranite and quartz monzonite show obvious fractionation between LREE and heavy rare-earth element (HREE) and high Th/U ratios, indicating a magmatic origin. They yield U-Pb lower intercept ages of 128 ± 2.3 Ma and 127 ± 1.3 Ma, representing the crystallization ages of these alkaline rocks. The negative correlations between CaO, Fe2O3 (Total), MgO, P2O5, TiO2, MnO and the pronounced depletion in Nb, Ta and Ti suggest that the alkaline rocks were formed by fractional crystallization. Additionally, the positive correlation between La/Hf and La, Th and Th/V, Ce/Yb and K2O, and Tb/Yb and Yb suggest that the alkaline melts are generated by partial melting. Such high Rb/Nb, (Th/Nb)N and Nb/Th ratios indicate crustal contamination during the magma emplacement. We, therefore, propose the magma source of the alkaline rocks in the Guandimiao complex originated by partial melting of lithospheric mantle, which experienced fractional crystallization and crustal contamination processes during its emplacement. Such complex alkaline rocks were probably formed in an extensional back-arc setting induced by the retreat of the subducting Izanagi plate.

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Geodynamic setting and ore formation of the Younusisayi thorium deposit in the Altyn orogenic belt, NW China

Cited by 8 publications

References 59 publications

Geochronology and Geochemistry of Granitic Pegmatites from Tashidaban Li Deposit in the Central Altun Tagh, Northwest China

Geochronology and Geochemistry of Granitic Pegmatites from Tashidaban Li Deposit in the Central Altun Tagh, Northwest China

Geochronology and Geochemistry of the Granite Porphyry from the Qinglingou Gold Deposit, South Qinling, China: Implication for Petrogenesis and Mineralization

Partial Melting of Lithospheric Mantle and Formation of the Early Cretaceous Alkaline Rocks in the Guandimiao REE Deposit, Luxi Terrane, Eastern China

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