Geochemical and isotopic constraints on the genesis of the Jueluotage native copper mineralized basalt, Eastern Tianshan, Northwest China

Zhang, Dayu; Zhou, Taofa; Yuan, Feng; Fiorentini, Marco L.; Said, Nuru; Lu, Yongjun; Pirajno, Franco

doi:10.1016/j.jseaes.2013.04.043

Cited by 33 publications

(2 citation statements)

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“…1c, Xiao et al, 2004Wang et al, 2014). The Yamansu arc predominantly comprises Carboniferous arc-related volcanic rocks, including basalts, andesites and minor rhyolites interbedded with fine-grained clastic sediments (Zhang et al, 2013;Hou et al, 2014). The Kanggurtag suture represents a 5 to 24 km wide and ~600 km long accretionary complex, which can be subdivided into two major tectonic assemblages: Devonian to Carboniferous meta-basaltic lavas, volcaniclastic rocks, deep-sea turbidites, sandstones and limestones in the southern part, and ophiolitic slices in the northern part (Yang et al, 1996;Xiao et al, 2004).…”

Section: Geological Backgroundmentioning

confidence: 99%

Carboniferous bimodal volcanic rocks in the Eastern Tianshan, NW China: Evidence for arc rifting

et al. 2017

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Detailed geochronological, geochemical and Sr-Nd isotopic data are presented for late Paleozoic volcanic rocks in the Dashitou area from the Eastern Tianshan, NW China, aiming to constrain their petrogenesis and tectonic implications. The Dashitou volcanic rocks show a bimodal distribution in composition, with dominant rhyolite and subordinate basalt. LA-ICPMS zircon U-Pb age indicates that the volcanic rocks were erupted at 330 ± 3 Ma. The basaltic rocks are medium-K calc-alkaline, enriched in light rare earth element (LREE) and large ion lithophile element (LILE; Ba and U), and depleted in high field strength element (HFSE; Nb, Ta and Ti). These features, together with their depleted isotopic signature (initial 87 Sr/ 86 Sr = 0.7035 to 0.7039, ε Nd (t) = 6.8 to 7.1), suggest that they were likely derived from a depleted mantle source metasomatized by subduction-related fluids. The rhyolitic rocks are high-K calc-alkaline, and exhibit characteristics of A 2-type granite, with typical enrichment in alkalis, Zr and Nb, and depletion in Sr, P and Ti. They are characterized by positive ε Nd (t) values (6.2-6.5) with young Nd model ages (0.57-0.58 Ga). Results of MELTS modeling imply that they were unlikely produced by fractional crystallization of coeval basaltic rocks. Instead, they were probably generated by partial melting of juvenile basaltic crust as a result of magma underplating. The geochemical and Sr-Nd isotopic characteristics, coupled with regional geology, indicate that the formation of the Dashitou bimodal volcanic rocks involves an extensional regime associated with a subduction-related environment. The rifting of the Dananhu-Harlik arc in response to the retreat of the subducting Northern Tianshan oceanic lithosphere may account for the Dashitou bimodal volcanic rocks.

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Section: Geological Backgroundmentioning

confidence: 99%

Carboniferous bimodal volcanic rocks in the Eastern Tianshan, NW China: Evidence for arc rifting

et al. 2017

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“…Spectral analysis showed that they contain oxides of copper, rare and valuable metals whose recovery requires advanced technologies (Zhang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The results of magnetic separation use in ore processing of metalliferous raw basalt of Volyn region

Malanchuk¹,

Malanchuk²,

Корнієнко³

et al. 2016

Min. miner. depos.

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Purpose. To determine the effectiveness of the electric field use in ore processing for extraction of native copper concentrate from raw basalt, to identify the most technologically advanced grain-size classes of the feed stock. To define the nature of the relationship between the amount of recoverable concentrate and the main dominant factorsseparator field density and the coarseness of the prepared raw material. Methods.We used the substantiated physical and chemical methods of elemental, mineral, fractional, particle size distribution analysis of the basalt rock mass under processing, methods of laboratory, semi-industrial and industrial research into crushing, grinding, classification, and electromagnetic separation processes at the stages of ore preparation of raw materials for the production of metalliferous industrial products. The methods of statistical modeling and experimental results regression analysis have been applied. Findings.The preferred grain-size classes in the process of ore preparation and classification of basalt rock components for electrostatic separation were determined. The dependences of copper concentrate production from basalt, tuff and lava-breccia on the electrostatic field density while changing grain-size classes in the initial product were worked out. The regression dependences of the copper concentrate output on various relationships between grain-size classes in the initial material and the electric field density were obtained.Originality. The content of native copper in basalt, lava breccia and tuff was established and the preferred grain-size classes in the process of ore preparation were identified. It is for the first time that the magnetic susceptibility of all three components of basalt raw material was determined, and the influence of the magnetic field on the output of titano-magnetite concentrate was shown as well as the rational grain size of ore preparation was detrmined. The dependences of the copper concentrate output have been established and the efficiency of the electrical separation in complex processing of basalt raw material has been proved. Practical implications.The obtained research results indicate the feasibility of complex processing of basalt raw material, on the grounds of which the method of its treatment was developed.

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Lithological and geochemical constraints on the magma conduit systems of the Huangshan Ni-Cu sulfide deposit, NW China

et al. 2016

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Geochemical and isotopic constraints on the genesis of the Jueluotage native copper mineralized basalt, Eastern Tianshan, Northwest China

Cited by 33 publications

References 75 publications

Carboniferous bimodal volcanic rocks in the Eastern Tianshan, NW China: Evidence for arc rifting

Carboniferous bimodal volcanic rocks in the Eastern Tianshan, NW China: Evidence for arc rifting

The results of magnetic separation use in ore processing of metalliferous raw basalt of Volyn region

Lithological and geochemical constraints on the magma conduit systems of the Huangshan Ni-Cu sulfide deposit, NW China

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