Petrogenesis of gold-mineralized magmatic rocks of the Taerbieke area, northwestern Tianshan (western China): Constraints from geochronology, geochemistry and Sr–Nd–Pb–Hf isotopic compositions

Tang, Gong‐Jian; Wang, Qiang; Wyman, Derek A.; Sun, Min; Zhao, Zhen‐Hua; Jiang, Zhenzhen

doi:10.1016/j.jseaes.2013.03.022

Cited by 45 publications

(41 citation statements)

References 107 publications

(143 reference statements)

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“…Most studies have suggested that the North Tianshan Orogen is the product of southward subduction of the North Tianshan Ocean beneath the Yili‐Central Tianshan Block (Allen, Windley, & Zhang, ; Charvet et al, ; Gao, He, & Li, ; Han et al, ; He, Cheng, Xu, Li, & Hao, ; Windley et al, ; Xiao et al, ; Xiao et al, ; Xiao et al, ), although a few have proposed northward subduction of the North Tianshan Ocean beneath the Junggar Terrane (Zhu, Feng, Yang, & Zhang, ). Moreover, there are diverse opinions about the time of closure of the North Tianshan Ocean ranging from Late Devonian to Early Carboniferous (Charvet et al, ; Tang et al, ), Late Carboniferous (Han et al, ; Han, He, Wang, & Guo, ; Han & Zhao, ; Li et al, ; Wang et al, ; Wang, Shu, Cluzel, Faure, & Charvet, ; Wilhem et al, ; Windley et al, ), Late Carboniferous to Early Permian (Allen et al, ; An, Zhu, Wei, & Lai, ), and Late Pemian to Middle Triassic (Xiao et al, ). Therefore, the structural framework and restoration of the North Tianshan are essential for a better understanding of the regional tectonics and the basic architecture of the Altaids (Şengör et al, ; Windley et al, ; Xiao et al, ).…”

Section: Introductionmentioning

confidence: 99%

A new Carboniferous–Permian intra‐oceanic subduction system in the North Tianshan (NW China): Implications for multiple accretionary tectonics of the southern Altaids

et al. 2020

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The North Tianshan in NW China is a key to understanding the accretionary history of the southern Altaids. However, the tectonic setting of the North Tianshan in the Carboniferous‐Permian is debatable, and its amalgamation history is ambiguous. We report new data on the field relations, geochronology and geochemistry of Carboniferous–Jurassic volcanic rocks and sedimentary rocks from the Shichang area in order to constrain the late Palaeozoic–Early Mesozoic tectonic evolution of the North Tianshan. New LA‐ICP‐MS zircon U–Pb dates demonstrate that the Carboniferous–Permian stratigraphy is a tectonic imbrication of Carboniferous–Permian rocks and Carboniferous volcanic rocks were emplaced in Permian volcano‐sedimentary rocks. The 311 ± 2 Ma volcanic rocks are calc‐alkaline, enriched in Light Rare Earth Elements and large‐ion lithophile elements, depleted in high‐field‐strength elements, and have low initial 87Sr/86Sr ratios with positive εNd(t)(+0.3 to +8.6)values. The geochemical‐isotopic data suggest the volcanic rocks were generated in an intra‐oceanic island arc. The turbidite samples 18SC02 (~267 Ma to ~349 Ma) and 18SC09 (~299 Ma to ~369 Ma) have a relatively narrow age range with no Devonian or Precambrian peaks. Our detrital zircon data suggest the presence of a so far unrecognized intra‐oceanic arc, which was isolated from the main Yili‐Central Tianshan and Mosuowan arcs in the Shichang area of the North Tianshan during the Late Carboniferous to Permian. The compiled detrital zircon data from Carboniferous to Jurassic indicates that the North Tianshan intra‐oceanic arc was probably amalgamated with the Mosuowan arc by the Early Triassic, and then accreted to the Yili‐Central Tianshan arc by the Middle‐Late Triassic, as revealed by the changes of zircon provenance of Carboniferous, Permian, Triassic and Jurassic sedimentary rocks. All integrated data suggest that the southern Altaids most likely formed by processes of multiple subduction–accretion and convergence similar to that in the ongoing southwest Pacific.

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Section: Introductionmentioning

confidence: 99%

A new Carboniferous–Permian intra‐oceanic subduction system in the North Tianshan (NW China): Implications for multiple accretionary tectonics of the southern Altaids

et al. 2020

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“…The DVF and plutonic rocks at the Tulasu district show igneous rock associations of basaltic andesite, andesite, rhyolite, gabbro diorite, quartz diorite, granodiorite, diorite porphyry, and porphyritic granite (Figure ). Previous whole‐rock geochemistry studies on these rock suites have identified many similarities, such as calc‐alkaline in composition, LILE and light REE enrichment, negative Nb, Ta, and Ti anomalies (Figure ), and broadly similar ages with regional arc‐related magmatism along the northern Yili Block (An et al, ; Long et al, ; Tang et al, ; Tang et al, ; Wang et al, ; Wang et al, ; Wang et al, ; Wang et al, ; Xia et al, ; Xie et al, ; Xue et al, ). However, these contemporaneous volcanic and plutonic rocks have narrow variability in some trace elements and distinct Sr‐Nd isotopic compositions (Figures and 10a), and thus are not related by any closed system processes.…”

Section: Discussionmentioning

confidence: 90%

“…Sources for whole‐rock Sr‐Nd isotope data: Neoproterozoic basement of the Yili Block (Wang et al, ) and Bayingou ophiolite (Xia et al, ). Sources for zircon Hf isotope data: volcanic rocks (An et al, ; Tang et al, ) and plutonic rocks (Tang et al, ). DM, depleted mantle; LCC, lower continental crust; UCC, upper continental crust [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Resultsmentioning

confidence: 99%

“…Whole rock geochemistry shows that these volcanic and plutonic rocks are either featured with typical continental arc magma signatures (An et al, ; An & Zhu, ; Peng et al, ; Xia et al, ; Zhao, Xue, Symons, et al, ), or display specific geochemical characteristics of adakites (Wang et al, ) or sanukitoids (Tang et al, ; Xie et al, ). This has led to controversial interpretations of their magma sources, including partial melting of mantle wedge peridotites metasomatized by slab‐derived fluids or sediments (An et al, ; An & Zhu, ; Wang et al, ; Xia et al, ; Xue et al, ), and interactions between subducted oceanic crust‐derived melts and mantle wedge with or without crustal contamination (Tang et al, ; Wang et al, ; Xie et al, ). However, the mafic to felsic varieties of the volcanic and plutonic rocks at Tulasu possess similar multi‐element patterns (Figure ), which might also suggest their origination from similar magma sources or from a common parental magma chamber (Tang et al, ; Xue et al, ; Zhao, Xue, Chi, et al, ).…”

Section: Discussionmentioning

confidence: 99%

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Volcanic–plutonic connection and associated Au‐Cu mineralization of the Tulasu ore district, Western Tianshan, NW China: Implications for mineralization potential in Palaeozoic arc terranes

et al. 2020

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Constructing the plutonic–volcanic connections in volcanic arc setting is essential for understanding a variety of magmatic processes from continental crust differentiation to formation of magmatic‐hydrothermal ore deposits. Based on the combination of zircon U–Pb geochronology and Hf isotope and whole‐rock geochemistry and Sr‐Nd isotopes, we evaluated the potential connections between volcanic and plutonic rocks from the Tulasu Basin, the largest epithermal gold ore district in the Chinese Western Tianshan. The peak of volcanism coincides well with the major plutonism, representing an important magma event at ~347–367 Ma. These contemporaneous volcanic and plutonic rocks show broadly similar arc‐related geochemical signatures and zircon in‐situ Hf (εHf[t] = −1.0–14.3) and whole‐rock Nd (εNd[t] = −4.2–4.6) isotopic compositions, indicative of formation from parental magmas derived from a common depleted mantle source metasomatized by slab‐derived melts, despite diverse consequent processes (fractional crystallization, crustal contamination, and magma mixing/mingling) during their differentiation in a subduction‐related setting. Volcanic rocks from the Axi caldera in the centre of the Tulasu district are geochemically less evolved than the coeval porphyritic granite, which indicates that the intrusive rocks might originate from residual melts left behind by extraction of erupted magmas. In contrast, the porphyry Cu mineralized Kexiaxi pluton, which occurs in the margin of the Tulasu district, is compositionally indistinguishable from the coeval volcanic suites. This implies that the Kexiaxi pluton represents the intrusive equivalent of a common magma reservoir feeding the volcanic eruptions, and magma fluxes may have controlled their differentiation. We thus suggest that the depleted mantle derived calc‐alkaline magma, modified during slab‐related melt metasomatism, crustal contamination, and magma mixing may have played an important role in copper enrichment at Kexiaxi. Finally, the relatively water‐rich and fertile nature of arc magma of the Tulasu district indicates high exploration potential for significant porphyry Cu‐Au deposits. The existing alteration‐immobile fertility proxy (V/Sc) for intrusive rocks may also be useful to assess the fertility of cogenetic volcanic rocks, in turn with implications for unexposed porphyry Cu deposits at depths.

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“…Li, Jin, et al, ; Y.J. Li, Li, Tong, Gao, & Tong, ). Many scholars proposed that the Yilianhaerga subduction trench was located in the northern Yining Massif and migrated southward (Cheng & Zhang, ; Tang et al, ; Tang et al, ; Xinjiang Bureau of Geology and Mineral Resources (Xinjiang BGMR), , ; Zhong et al, ), and a bipolar subduction model was proposed by Ge et al (). Distribution and petrology of the volcanic rocks in the Yining Massif clearly hold the key to solve these geological problems.…”

Section: Introductionmentioning

confidence: 99%

Carboniferous tectonic configuration of the Yining Massif in Western Tianshan, NW China

Yang

et al. 2018

Geological Journal

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The tectonic evolution and configuration of the Carboniferous trench‐arc‐basin system (TABS) in the Yining Massif (Western Tianshan, NW China) have long been controversial. The question of the existence of an ancient ocean basin and its subduction polarity is crucial to address this issue. In this study, we suggest that the Early Carboniferous calc‐alkaline volcano‐sedimentary rocks were formed in a fore‐arc/back‐arc basin system, whereas the Late Carboniferous bimodal volcanic rocks and their associated sedimentary rocks were formed under a continental rift setting after the Junggar‐Tarim collision. We propose that the Southern Tianshan ocean basin may have closed in the Late Early Carboniferous, terminating the TABS at Yining. Spatial–temporal distribution of volcanic‐sedimentary rock assemblages suggests that the Early Carboniferous Southern Tianshan ancient ocean basin was similar to the TABS system of the present‐day Japanese island arc.

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Petrogenesis of gold-mineralized magmatic rocks of the Taerbieke area, northwestern Tianshan (western China): Constraints from geochronology, geochemistry and Sr–Nd–Pb–Hf isotopic compositions

Cited by 45 publications

References 107 publications

A new Carboniferous–Permian intra‐oceanic subduction system in the North Tianshan (NW China): Implications for multiple accretionary tectonics of the southern Altaids

A new Carboniferous–Permian intra‐oceanic subduction system in the North Tianshan (NW China): Implications for multiple accretionary tectonics of the southern Altaids

Volcanic–plutonic connection and associated Au‐Cu mineralization of the Tulasu ore district, Western Tianshan, NW China: Implications for mineralization potential in Palaeozoic arc terranes

Carboniferous tectonic configuration of the Yining Massif in Western Tianshan, NW China

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