SIMS U-Pb zircon dating and Re-Os isotopic analysis of the Hulu Cu-Ni deposit, eastern Tianshan, Central Asian Orogenic Belt, and its geological significance

Han, Chunming; Xiao, Wenjiao; Zhao, Guochun; Su, Ben‐Xun; Sakyi, Patrick Asamoah; Ao, Songjian; Wan, Bo; Zhang, Jien; Zhang, Zhiyong

doi:10.3190/jgeosci.146

Cited by 31 publications

(3 citation statements)

References 70 publications

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“…Mafic‐ultramafic magmatic age histogram of the Palaeozoic eastern Tianshan Orogen (data source: J. P. Chen et al, 2016; B. Y. Chen et al 2018 Deng et al, 2020; Feng et al, 2018; C. Han et al, 2010, 2013b; B. F. Han, Ji, Song, Chen, & Li, 2004; J. Y. Li et al, 2006; Y. J. Mao et al, 2016; Qin et al, 2011; San et al, 2010; Shi et al, 2018; Su et al, 2011, 2014; Y. Sun et al, 2019; T. Sun, Qian, Li, et al, 2013b; D. M. Tang et al, 2009, 2011; Y. W. Wang, Wang, Wang, & Long, 2009; H. Wu et al, 2005; Xia et al, 2008; Y. Zhao et al, 2015; Zhao et al, 2018a; M. F. Zhou et al, 2004; G. C. Zhou et al, 2019)…”

Section: Discussionmentioning

confidence: 99%

Geochronology and geochemistry of a newly identified Permian hornblende gabbro suite in Aqishan–Yamansu Belt, eastern Tianshan, NW China: Implications on petrogenesis and tectonic setting

et al. 2021

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Permian mafic‐ultramafic intrusions have great significance for understanding the geodynamic evolution of the Late Palaeozoic eastern Tianshan Orogen due to containing important information on the nature of mantle sources, crust–mantle interaction, and magmatic differentiation. Increasingly, more Permian mafic‐ultramafic intrusions are discovered in the Jueluotage belt, especially in the Kangguer ductile shear zone, whereas the mafic‐ultramafic intrusions in the Aqishan–Yamansu belt are ill‐informed. In this study, we provide zircon U–Pb geochronological, geochemical, and Sr–Nd–Pb–Hf isotopic data of a newly identified hornblende gabbro suite at the Shaquanzi Fe–Cu deposit in the Aqishan–Yamansu Belt. Zircon U–Pb dating results indicate that the Shaquanzi hornblende gabbro was emplaced at Early Permian (ca. 274–265 Ma). The rocks are calc‐alkaline and have arc‐like geochemical features, including enrichments in large‐ion lithophile elements (LILEs: Rb, Ba, K, Pb and Sr) and light rare‐earth elements (LREEs: Nb, Ta, Zr, Hf, and Ti), and depletions in high‐field‐strength elements (HFSEs) with markedly negative Nb and Ta anomalies. The rocks also exhibit depleted‐mantle isotopic signatures, with positive bulk‐rock εNd(t) values of +3.34 to +4.44 and positive zircon εHf(t) values of +2.8 − +8.7, which are relatively more enriched than those of coeval mafic‐ultramafic intrusions from the Kangguer ductile shear zone, but similar to those in the Central Tianshan Massif. We suggest that the Shaquanzi mafic intrusion suite was generated by 10–30% partial melting of a depleted‐mantle source at over 85 km depth, corresponding to the garnet to garnet‐spinel stability field. And the mantle source had likely been metasomatized by slab‐derived fluids of previous subduction. Integrating with geochemical data of the coeval mafic‐ultramafic and felsic intrusive rocks in the adjacent tectonic belts of eastern Tianshan Orogen, we speculate that the Shaquanzi mafic intrusion was formed in a post‐collision extensional setting, probably triggered by slab breakoff. Metasomatism of the depleted lithospheric mantle had likely occurred during the pre‐Permian subduction of the Kangguer oceanic slab.

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Section: Discussionmentioning

confidence: 99%

Geochronology and geochemistry of a newly identified Permian hornblende gabbro suite in Aqishan–Yamansu Belt, eastern Tianshan, NW China: Implications on petrogenesis and tectonic setting

et al. 2021

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“…Most are wholerock K-Ar or Sm-Nd ages; only a few were obtained by a Re-Os method (Han et al 2013). Because of alteration, whole rock K-Ar and Sm-Nd ages provide poor constraints on the timing of the magmatism and mineralization in this area, though.…”

Section: Geochronological Frameworkmentioning

confidence: 99%

“…1; Han et al 2013). In our study we focus on three of them that are located in two different tectonic units: the Dananhu-Tousuquan arc system (Xiangshan intrusion) and the Beishan rift terrane (Poshi and Luodong intrusions).…”

Section: Geology Of Mineral Depositsmentioning

confidence: 99%

Age and tectonic setting of magmatic sulfide Cu-Ni mineralization in the Eastern Tianshan Orogenic Belt, Xinjiang, Central Asia

Han

Xiao²,

Zhao³

et al. 2013

J. Geosci.

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During the Late Paleozoic, extensive magmatism and associated ore deposits were developed in the Eastern Tianshan Orogenic Belt (the Central Asian Orogenic Belt, NW China). In order to better constrain the petrogenesis of the intrusions in the area, we performed major-and trace-element whole-rock geochemical analyses as well as in situ zircon U-Pb and Hf isotopic analyses from the Xiangshan, Luodong and Poshi batholiths. Voluminous 276-284 Ma ultramafic and mafic rocks (associated with magmatic Cu-Ni sulfide deposits of the same age) have variable Hf isotopic compositions (ε Hf (t) = −10.3 to +14.3), indicating an origin via the contamination of depleted mantle-derived magma by variable amounts of ancient lower crust. The large mafic-ultramafic complexes were emplaced most likely during closure of the ancient Tianshan Ocean, resulting in the formation of several magmatic Cu-Ni sulfide deposits in the Early Permian times.

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Palaeozoic tectonic evolution and magmatism in the Kalatag area, East Tianshan, NW China: Evidence from the geochronology and geochemistry of intrusive rocks

et al. 2022

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The Kalatag area contains many intrusive rocks of Late Ordovician to Permian age and hosts polymetallic deposits that are associated with magmatism. It is a key area for revealing the nature and genesis of the Palaeozoic rocks in East Tianshan. The intrusive rocks of different periods preserve useful information regarding the tectonomagmatic history of the Kalatag area. Zircon U–Pb geochronological, Hf isotopic, Sr–Nd isotopic, and whole‐rock geochemical analyses are reported for the intrusions from the Meiling ore district, Yudai ore district, and Kalatag pluton to reveal their petrogenesis and geodynamic setting. The LA–ICP–MS zircon U–Pb analyses suggest that the quartz diorite from the Kalatag pluton formed at 420–432 Ma, and the quartz diorite porphyry from the Yudai ore district formed at 436–439 Ma. The zircons from the quartz diorite and quartz diorite porphyry mainly yield high εHf(t) values (12.2–16.2) and very young Hf model ages (TDM = 0.41–0.56 Ga; TDMC = 0.49–0.56 Ga), which are consistent with a depleted mantle origin. The geochemical characteristics of the granites and quartz diorites from the Kalatag pluton and diorite porphyry from the Meiling ore district exhibit typical subduction‐related features such as enrichment in LILEs and LREEs and depletion in HFSEs. These diorites have moderate Mg# (30–47), positive εNd(t) values (4.2–5.6), and young Nd model ages (0.62–0.83 Ga), which are consistent with a depleted mantle origin that is accompanied by limited crustal assimilation. Based on the regional geology and geochemical evidence and previous studies, the Ordovician–Carboniferous rocks from the Kalatag area are considered to have formed in an island‐arc setting and were probably formed by a subduction event.

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SIMS U-Pb zircon dating and Re-Os isotopic analysis of the Hulu Cu-Ni deposit, eastern Tianshan, Central Asian Orogenic Belt, and its geological significance

Cited by 31 publications

References 70 publications

Geochronology and geochemistry of a newly identified Permian hornblende gabbro suite in Aqishan–Yamansu Belt, eastern Tianshan, NW China: Implications on petrogenesis and tectonic setting

Geochronology and geochemistry of a newly identified Permian hornblende gabbro suite in Aqishan–Yamansu Belt, eastern Tianshan, NW China: Implications on petrogenesis and tectonic setting

Age and tectonic setting of magmatic sulfide Cu-Ni mineralization in the Eastern Tianshan Orogenic Belt, Xinjiang, Central Asia

Palaeozoic tectonic evolution and magmatism in the Kalatag area, East Tianshan, NW China: Evidence from the geochronology and geochemistry of intrusive rocks

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