Geology, mineralization, and fluid inclusion characteristics of the Chorukh-Dairon W–Mo–Cu skarn deposit in the Middle Tien Shan, Northern Tajikistan

Soloviev, Serguei G.; Kryazhev, S. G.

doi:10.1016/j.oregeorev.2016.06.021

Cited by 37 publications

(8 citation statements)

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“…337 to 315 Ma) pulse in the Almalyk porphyry Cu‐Au‐Mo district (Cheng et al, 2017; Zhao et al, 2017), and the late (ca. 306–298 Ma) pulse in the Chorukh‐Dairon skarn W‐Mo(‐Cu‐Au) district (Khalimov et al, 2022; Soloviev et al, 2024a; Soloviev & Kryazhev, 2017; Volkov et al, 1990). Whereas the early pulse can be associated with subduction‐related magmatism, the late pulse appears to be post‐collisional (Soloviev et al, 2024a).…”

Section: Discussionmentioning

confidence: 99%

“…During the Early Devonian to Late Carboniferous, the 'Nikolaev Line' represented a zone of intracontinental, possibly backarc rifting associated with a north-dipping subduction, whereas in the Late Carboniferous to Permian it was part of a larger continental collision structure between the Kazakhstan-Northern Tien Shan and Tarim microcontinents (Jenchuraeva, 2001). F I G U R E 1 Regional tectonic setting and the major Late Palaeozoic gold, tungsten and other deposits of the Tien Shan metallogenic belt ('Tien Shan Gold Belt') (modified after Biske & Seltmann, 2010;Biske et al, 2013;Kudrin et al, 1990;Seltmann & Porter, 2005;Seltmann et al, 2011Seltmann et al, , 2014Soloviev & Kryazhev, 2017Soloviev et al, 2024bSoloviev et al, , 2024cYakubchuk et al, 2005Yakubchuk et al, , 2012.…”

Section: Tectonic and Metallogenic Setting Of The ' Nikolaev Line'mentioning

confidence: 99%

“…Regional tectonic setting and the major Late Palaeozoic gold, tungsten and other deposits of the Tien Shan metallogenic belt (‘Tien Shan Gold Belt’) (modified after Biske & Seltmann, 2010; Biske et al, 2013; Kudrin et al, 1990; Seltmann & Porter, 2005; Seltmann et al, 2011, 2014; Soloviev & Kryazhev, 2017, 2018; Soloviev et al, 2024b, 2024c; Yakubchuk et al, 2005, 2012). …”

Section: Regional Tectonic and Metallogenic Settingmentioning

confidence: 99%

“…; Bortnikov et al, 1996; Cole et al, 2000; Kempe et al, 2016; Mao et al, 2004; Seltmann et al, 2020). There are also various (from oxidized through redox‐intermediate to reduced) skarn W deposits (Soloviev, 2011, 2015; Soloviev & Kryazhev, 2017, 2018). The northern segments of the belt are characterized by the presence of intense Cu‐Au(‐Mo) porphyry and skarn mineralization, including the world‐class Almalyk Cu‐Mo‐Au porphyry deposit (Seltmann et al, 2014; Seltmann & Porter, 2005).…”

Section: Regional Tectonic and Metallogenic Settingmentioning

confidence: 99%

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Late Palaeozoic potassic igneous rocks of the Molo‐Sarychat pluton in the eastern Kyrgyz Tien Shan: Geochemistry, U–Pb zircon geochronology and implications for related skarn‐porphyry Mo‐W‐Cu‐Au mineralization

Soloviev,

Kryazhev,

Semenova

et al. 2024

Geological Journal

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The Molo‐Sarychat multiphase pluton is situated along the fault systems of the ‘Main Structural Line of Tien Shan’ (known also as the ‘Nikolaev Line’). It comprises mafic to intermediate (monzodiorite, monzonite) and silicic (quartz monzonite, monzogranite and leucogranite‐alaskite) rocks, followed by the late mafic (monzodiorite‐porphyry to lamprophyre) dikes. Isotopic U‐Pb zircon dating of quartz monzonite and monzogranite indicates their Early Permian age (ca. 293 to 286 Ma). The rocks appear to have been produced by remelting of a partially crystallized (mush) magma batch at deeper levels, which is evident by the presence of zircon antecrysts dated at some 306 to 320 Ma. These geochronological data are consistent with a post‐collisional setting of the pluton that occurred after the cessation of subduction, which affected the Middle Tien Shan in the Late Palaeozoic. Geochemical signatures of the igneous rocks from the Molo‐Sarychat pluton correspond to high‐K calc‐alkaline to shoshonitic series intrusions emplaced in a post‐collisional setting. An initial shoshonitic magma was produced by a low‐degree partial melting of the metasomatically enriched upper mantle, with amphibole fractionation in a deep (lower crustal) magma chamber. In this evolution, a generation, under the influence of mantle‐supplied fluids and heat, granitic magmas in the crustal protolith can be suggested, with further mixing/mingling of the mantle‐derived mafic (shoshonitic) magma and mantle‐induced crustal granitic magma, followed by the magma fractionation and emplacement at shallower crustal levels. The skarn‐porphyry Mo‐Cu‐W(‐Au) mineralization associated with the Molo‐Sarychat pluton complements the group of similar deposits associated with high‐K calc‐alkaline to shoshonitic series intrusions in the Middle Tien Shan and globally. The characteristic Mo‐W‐Cu‐Au metal assemblage and the high endowment in W and particularly Mo can be related to the fertilization of subduction‐modified subcontinental mantle in these metals, and its subsequent involvement in the magma generation in post‐collisional setting. A certain role of crustal magma sources in the strong Mo endowment can be considered that would be consistent with some A‐type granitoid affinity of the igneous rocks. The Early Permian age of these high‐potassic intrusions supporting their post‐collisional emplacement is remarkably similar to the age of hydrothermal alteration assemblages, previously reported for the super‐large Kumtor Au deposit situated in a similar post‐collisional setting nearby.

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Section: Discussionmentioning

confidence: 99%

Section: Tectonic and Metallogenic Setting Of The ' Nikolaev Line'mentioning

confidence: 99%

Section: Regional Tectonic and Metallogenic Settingmentioning

confidence: 99%

Section: Regional Tectonic and Metallogenic Settingmentioning

confidence: 99%

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Late Palaeozoic potassic igneous rocks of the Molo‐Sarychat pluton in the eastern Kyrgyz Tien Shan: Geochemistry, U–Pb zircon geochronology and implications for related skarn‐porphyry Mo‐W‐Cu‐Au mineralization

Soloviev,

Kryazhev,

Semenova

et al. 2024

Geological Journal

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“…The Cu ± Au-W-Mo mineralization assemblages in skarn deposits are generally related to magma with high potassium, water content and oxygen fugacity (Soloviev, 2015;Soloviev and Kryazhev, 2017). Previous studies have shown that the source magma of quartz monzonite porphyry in Mamupu had such characteristics (Zhang et al, 2022a).…”

Section: Implications For Metallogeny and Regional Explorationmentioning

confidence: 98%

Texture and Geochemistry of Multi‐stage Hydrothermal Scheelite in the Mamupu Cu‐Au‐Mo(‐W) Deposit, Eastern Tibet: Implications for Tungsten Mineralization in the Yulong Belt

ZHANG,

TANG,

LIN

et al. 2024

Acta Geologica Sinica (Eng)

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Multistage tungsten mineralization was recently discovered in the Mamupu copper‐polymetallic deposit in the southern Yulong porphyry copper belt (YPCB), Tibet. This paper reports the results of cathodoluminescence, trace element and Sr isotope analyses of Mamupu scheelite samples, designed to better constrain the mechanism of W mineralization and sources of ore‐forming fluids. Three different types of scheelite are identified in the Mamupu deposit: scheelite A (Sch A) mainly occurs in breccias during the prograde stage, scheelite B (Sch B) forms in the chlorite‐epidote alteration zone in the retrograde stage, and scheelite C (Sch C) occurs in distal quartz sulfide veins. The extremely high Mo content and negative Eu anomaly in Sch A represent high oxygen fugacity in the prograde stage. Compared with ore‐related porphyries, Sch A has a similar REE pattern, but with higher ΣREE, more depleted HREE, and slightly lower (87Sr/86Sr)i ratios, and these features suggest that Sch A is genetically related to ore‐related porphyries, but the extensive interaction with carbonate surrounding rocks affects the final REE and Sr isotopic composition. Sch B shows dark (Sch B‐I) and light (Sch B‐II) domains under CL images. From Sch B‐I to Sch B‐II, LREEs are gradually depleted, and MREEs are gradually enriched. Sch C has the highest LREE/HREE ratio, which indicates that it inherited the geochemical characteristics of fluids after the precipitation of HREE‐rich minerals such as diopside, and garnet in the early prograde stage. The Mo content in Sch B and Sch C gradually decreased, indicating that the oxygen fugacity of the fluids changed from oxidation in the early stage to reduction in the later stage, and the turbulent Eu anomaly in Sch B and Sch C indicates that the Eu anomaly in the Mamupu scheelite is not only controlled by oxygen fugacity. The extensive interaction of magmatic‐hydrothermal fluids and carbonate provides the necessary Ca2+ for the precipitation of scheelite in the Mamupu deposit.

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Introduction

Müller¹,

Groves²

2018

Potassic Igneous Rocks and Associated Gold-Copper Mineralization

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Geology, mineralization, and fluid inclusion characteristics of the Chorukh-Dairon W–Mo–Cu skarn deposit in the Middle Tien Shan, Northern Tajikistan

Cited by 37 publications

References 53 publications

Late Palaeozoic potassic igneous rocks of the Molo‐Sarychat pluton in the eastern Kyrgyz Tien Shan: Geochemistry, U–Pb zircon geochronology and implications for related skarn‐porphyry Mo‐W‐Cu‐Au mineralization

Late Palaeozoic potassic igneous rocks of the Molo‐Sarychat pluton in the eastern Kyrgyz Tien Shan: Geochemistry, U–Pb zircon geochronology and implications for related skarn‐porphyry Mo‐W‐Cu‐Au mineralization

Texture and Geochemistry of Multi‐stage Hydrothermal Scheelite in the Mamupu Cu‐Au‐Mo(‐W) Deposit, Eastern Tibet: Implications for Tungsten Mineralization in the Yulong Belt

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