Late Jurassic–Early Cretaceous granitoid magmatism in Eastern Qinling, central-eastern China: SHRIMP zircon U–Pb ages and tectonic implications

Mao, Jingwen; Xie, Guiqing; Pirajno, Franco; Ye, H. S.; Wang, Y. B.; Li, Y. F.; Xiang, Junfeng; Zhao, Hongying

doi:10.1080/08120090903416203

Cited by 296 publications

(105 citation statements)

References 56 publications

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“…They intruded into the Archean amphibolite facies metamorphic rocks or Proterozoic to early Paleozoic unmetamorphosed volcanic-sedimentary sequences throughout the southern margin of the NCC (Fig. 1B) (Mao et al, 2010). The mafic intrusions in this region, dominated by mafic dykes or stocks, were mainly emplaced the Archean metamorphic rocks during Mesoproterozoic (Peng et al, 2008), and sporadically during late Mesozoic (Wang et al, 2008).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…The overthickened lithosphere underwent extensional thinning that triggered further asthenospheric upwelling, mafic magma underplating, and melting of the middle-lower crust (Fig. 12B) (Mao et al, 2010;Wu et al, 2005). The voluminous felsic magma emplaced along the Luanchuan fault belt and generated the peraluminous granites, such as the monzogranite in the Xiong'er and Taihua Groups (Fig.…”

Section: Implications For Tectonic Evolutionmentioning

confidence: 99%

“…160-135 Ma) in the southern margin of the NCC form a roughly northwest-southeast-trending belt, also implying formation of the thickened crust before late Jurassic ( Fig. 12B; Gao et al, 2010;Li et al, 2012b;Mao et al, 2010;Zhao et al, 2012). In the Waifangshan area, the 148-135 Ma Heyu adakitic pluton marks the transformation of the lithosphere from thickening to thinning in the southern margin of the NCC (Gao et al, 2010;Li et al, 2012b).…”

Section: Implications For Tectonic Evolutionmentioning

confidence: 99%

“…Late Mesozoic granitoid intrusions in the southern margin of the NCC were formed in two main magmatic intervals, the late Jurassic to early and the early , in distinct tectonic settings (Mao et al, 2010). Many researchers have demonstrated that the 160-135 Ma adakitic granites were produced by partial melting of thickened lower continental crust Lithos 206-207 (2014) [65][66][67][68][69][70][71][72][73][74][75][76][77][78] (Ding et al, 2011;Gao et al, 2010;N.…”

Section: Introductionmentioning

confidence: 99%

“…Mao et al, 2011), crust-mantle interaction and the tectonic evolution of the NCC (e.g. Mao et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Petrogenesis of the early Cretaceous intermediate and felsic intrusions at the southern margin of the North China Craton: Implications for crust–mantle interaction

Gao¹,

Zhao²,

Bao³

et al. 2014

Lithos

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Section: Geological Backgroundmentioning

confidence: 99%

Section: Implications For Tectonic Evolutionmentioning

confidence: 99%

Section: Implications For Tectonic Evolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Mao et al, 2011), crust-mantle interaction and the tectonic evolution of the NCC (e.g. Mao et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Petrogenesis of the early Cretaceous intermediate and felsic intrusions at the southern margin of the North China Craton: Implications for crust–mantle interaction

Gao¹,

Zhao²,

Bao³

et al. 2014

Lithos

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Hydrothermal mineralization at the Dahu Au–Mo deposit in the Xiaoqinling gold field, Qinling Orogen, central China

Zhang

2014

Geological Journal

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The Xiaoqinling gold field in central China is the second largest orogenic Au province in China. In the Xiaoqinling area, the Dahu Au-Mo deposit is typical because it is one of the five early-discovered large gold deposits, but also unique for its northernmost location and Mo-association. This study shows that the deposit is a fault-controlled lode system formed by a three-stage hydrothermal process. The early-stage pyrite-quartz veins are structurally deformed and broken. The middle-stage molybdenite-pyrite-quartz stockworks (mostly coaxial) infill the cracks of the early-stage veins and minerals. The late-stage open-space filling quartz-carbonate veinlets show a comb-like texture. The early-and late-stage quartz only contains the fluid inclusions of CO 2 -H 2 O and H 2 O-NaCl types, respectively, suggesting an evolution from CO 2 -rich to CO 2 -poor; whereas the middle-stage quartz contains fluid inclusions of CO 2 -H 2 O, H 2 O-NaCl, pure CO 2 and daughter mineralbearing types, supporting a boiling fluid system, because they can occur in a microscopic domain of a single crystal, homogenize divergently at similar temperatures clustering between 293 and 410°C, and show contrasting salinities of <13.6 wt.% and >26.3 wt.% NaCl equiv. The inclusions in early-stage quartz are homogenized at 402-503°C, with salinities of 4.5-10.4 wt.% NaCl equiv.; and those in late-stage quartz are homogenized at temperatures of <251°C, with salinities of 14.4-14.8 wt.% NaCl equiv. The trapping pressures of inclusions are estimated to be 138-331 MPa in the early stage and 78-237 MPa in the middle stage, implying that the fluid system alternately fluctuated from lithostatic to hydrostatic, which was controlled by a fault-valve mechanism at depths of >11 km and~7.8 km, respectively. Hydrogen and oxygen isotope signatures indicate that the fluids originated from metamorphic devolatilization in the early stage, then mixed with meteoric water in the middle stage, and finally replaced by meteoric water in the late stage. Hence, it is concluded, that metal precipitation at the Dahu deposit was mainly caused by fluid boiling, followed by fluid mixing, along with a trans-compressing at the transitional zone from a magmatic arc to back-arc basin, which resulted from the Triassic northward subduction of the Mian-Lue oceanic slab.

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Ore geology and fluid inclusion study of the Donggebi giant porphyry Mo deposit, Eastern Tianshan, NW China

Wang

Yang

et al. 2014

Geological Journal

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The Donggebi giant porphyry Mo deposit in Hami city, Xinjiang Province, NW China, was formed in the Triassic in the Jueluotage metallogenic belt of Eastern Tianshan. Mo mineralization is associated with the Donggebi porphyritic granite, occurring as numerous stockworks in the altered wall rocks. The hydrothermal ore‐forming process can be divided into four stages, from early to late, characterized by veinlets composed of (1) quartz + K‐feldspar ± beryl ± pyrite ± tourmaline; (2) quartz + molybdenite ± K‐feldspar ± tourmaline ± fluorite ± beryl; (3) quartz + polymetallic sulphides ± fluorite; and (4) quartz + calcite ± fluorite. Three types of fluid inclusions (FIs) are distinguished in this study based on petrographic and microthermometric criteria, i.e. carbonic (C‐type), aqueous (W‐type) and solid‐bearing fluid inclusions (S‐type). All three types of FIs can be observed in the quartz, beryl and fluorite formed in stages 1, 2 and 3, while the stage 4 minerals only contain aqueous inclusions. The FIs in minerals of stages 1, 2, 3 and 4 yield homogenization temperatures of 261–443, 210–385, 152–304 and 159–263 °C, respectively, and salinities of ≤9.3 wt.% NaCl equiv., without consideration of the contribution from daughter minerals. The maximum estimated pressure decrease from 193 MPa in stage 1, through 182 MPa in stage 2, to 129 MPa in stage 3, suggesting the maximum mineralizing depths decreased from 8.4, through 7.9, to 5.6 km, and possibly occurred at 5.6–7.9 km. Therefore, the ore‐forming fluids at Donggebi are characterized by high‐temperature, CO2‐bearing and NaCl‐poor and then progressively evolved to CO2‐poor and lower‐temperature. Copyright © 2014 John Wiley & Sons, Ltd.

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Late Jurassic–Early Cretaceous granitoid magmatism in Eastern Qinling, central-eastern China: SHRIMP zircon U–Pb ages and tectonic implications

Cited by 296 publications

References 56 publications

Petrogenesis of the early Cretaceous intermediate and felsic intrusions at the southern margin of the North China Craton: Implications for crust–mantle interaction

Petrogenesis of the early Cretaceous intermediate and felsic intrusions at the southern margin of the North China Craton: Implications for crust–mantle interaction

Hydrothermal mineralization at the Dahu Au–Mo deposit in the Xiaoqinling gold field, Qinling Orogen, central China

Ore geology and fluid inclusion study of the Donggebi giant porphyry Mo deposit, Eastern Tianshan, NW China

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