Re-Os Geochronology and Sulfur Isotopes of the Lyangar W-Mo Deposit: Implications for Permian Tectonic Setting in South Tianshan Orogen, Uzbekistan

Zhou, Quan; Chen, Guihai; Nurtaev, Bakhtiar; Shukurov,; Han, Sang-Min; Wang, Hong; Xiao, Jing; A, Yu

doi:10.3390/min9090534

Cited by 4 publications

(6 citation statements)

References 50 publications

(46 reference statements)

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“…Bismuth minerals are also widely developed in silverpolymetallic ores and are represented by Ag-bursaite, pilsenite, wittite, galeno-bismuthite, and cannizzarite. Bursaite, platinite, heyrovskite, and weibulite are less common and have been found in the Koytash deposit [17]. Mass spectrometric analysis of monomineralic sulphide fractions in skarn-rare-metal ores has shown that they are elevated in chalcopyrite, but their pyrrhotite content is twice as low.…”

Section: Methodsmentioning

confidence: 99%

Identification of mineral associations in skarn-rare-metallic deposits in Western Uzbekistan

et al. 2023

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This article solves the applied scientific problem of identifying mineral carriers and mineral associations of platinum mineralization in the skarn-gold-rare metal Koytash and Lyangar deposits. One of the applied research tasks was to identify the forms of mineral carriers and mineral associations of platinum-metal mineralization for these deposits. We carried out geological fieldwork of the Koytash and Lyangar deposits, which included a sampling of sulphide-rare metal and silver-polymetallic ores, and conducted laboratory studies by using mass spectrometry, atomic absorption, electron microprobe, and other modern methods. This article addresses the complex formation of sulphide-rare-metal and silver-polymetallic ores of the above-mentioned deposits. The formation of mineral associations bearing rare-metal (W-Mo) mineralization that formed in the early alkaline stage, in almost all sites, is completed by sulphide-rare metal and silver-polymetallic mineralization that often carry industrial-grade concentrations of noble and other metals. We have identified a recommended location for the concomitant extraction of useful components, the mineral composition, and the impure elements in them. These data show the prospects of sulphide-rare metals and sulphidepoly-metallic ores in the Koytash deposit for precious metals, bismuth, etc.

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Section: Methodsmentioning

confidence: 99%

Identification of mineral associations in skarn-rare-metallic deposits in Western Uzbekistan

et al. 2023

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“…The Lyangar W-Mo skarn deposit is located in the South Nuratau district at the contact zone between the Middle F I G U R E 1 (a) Schematic tectonic map of Asia, showing the location of the south Tianshan Orogen (modified after Sengör et al, 1993;Zhou et al, 2019). (b) Tectonic map of the south Tianshan Orogen and the location of key mineral deposits (modified after Seltmann et al, 2014;Kempe et al, 2016;Dolgopolova et al, 2017) F I G U R E 2 Schematic geological map of the Lyangar W-Mo deposit (modified from Soloviev & Kryazhev, 2018a) Carboniferous rocks and the Aktau pluton (Figure 2).…”

Section: Deposit Geologymentioning

confidence: 99%

“…(a) Schematic tectonic map of Asia, showing the location of the south Tianshan Orogen (modified after Sengör et al, 1993; Zhou et al, 2019). (b) Tectonic map of the south Tianshan Orogen and the location of key mineral deposits (modified after Seltmann et al, 2014; Kempe et al, 2016; Dolgopolova et al, 2017)…”

Section: Regional Geologymentioning

confidence: 99%

“…The STOB is located in the southwest margin of the CAOB. It was formed by the continental collision between Tarim Craton and Kazakhstan‐Yili blocks (Klemd et al, 2015; Zhou et al, 2019) (Figure 1b).…”

Section: Regional Geologymentioning

confidence: 99%

“…However, the STOB is also endowed with a number of significant skarn W and W‐Mo deposits (Dolgopolova et al, 2017; Soloviev & Kryazhev, 2018a; Soloviev & Kryazhev, 2018b). The Lyangar deposit is a typical example of skarn W‐Mo deposit related to widely distributed Permian intrusive rocks formed in the post‐collisional tectonic settings in the south Tianshan terrane (Soloviev & Kryazhev, 2018a; Zhou et al, 2019). Previous studies have recognized that the intrusive rocks in the district are composed of dioritic rocks to high‐Si (SiO 2 > 70%) granites and the latter accounts for major W‐Mo mineralization.…”

Section: Introductionmentioning

confidence: 99%

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Extremely fractionated magmas linked with W mineralization: Evidence from the LyangarW‐Modeposit, South Tianshan Orogenic Belt

et al. 2022

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Tungsten (W) deposits are commonly related to the exsolution of magmatic‐hydrothermal fluids from high‐Si granites (SiO2 > 70%). However, whether the W‐related high‐Si granitic magma is produced via partial melting of metasedimentary source rocks or by high degree of fractional crystallization remains controversial. Here we present new geochronological and geochemical data on the intrusions associated with the Lyangar W‐Mo skarn deposit in the Southern Tianshan Orogenic Belt, Uzbekistan. Our new U–Pb zircon age data show that the major intrusion exposed in the region are ca. 280 Ma biotite gabbroic diorite and biotite granite and about 260 Ma porphyritic granite and muscovite porphyritic granite. The molybdenite grains in the skarn rocks and orebodies show weighted Re‐Os ages of 261.4 ± 7.8 Ma and 261.1 ± 3.8 Ma, respectively. In combination with the field contact, we confirm that the muscovite porphyritic granite is genetically related to the W mineralization. The gradual transition from the porphyritic granite to muscovite porphyritic granite, similar mineral assemblages and geochemical variations indicate that they are co‐magmatic, and that the porphyritic granite represents less evolved member. Rhyolite‐MELTS modeling further reinforces that the muscovite porphyritic granites can be produced by high degree of fractional crystallization (~33%, including ~1.2% biotite, ~27% plagioclase, ~2% alkali‐feldspar, ~0.21% Fe‐Ti oxides, and ~2.7% amphibole) of the porphyritic granite magma. On the basis of the positive ƐHf(t) values (+3.03 to +6.02), high‐SiO2 contents and CIPW characters, the porphyritic granite is considered to have formed from dehydration melting at low pH2O of juvenile basaltic source rocks around 16 kbar and 850–1000°C. Our study demonstrates that extreme fractional crystallization of granitic magma plays a significant role in W enrichment in the granitic melt.

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Geoecological and geochemical assessment of the impact of NMMC mining enterprises on the environment

Shukurov,

Sharafutdinov,

Rashidov

et al. 2024

E3S Web of Conf.

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Study of the dynamics of natural and man-made processes and their impact on the environment in the hills of Uzbekistan; study of ecological and geochemical processes occurring in technogenic and natural landscapes of mining enterprises of the NMMC; Conducting geochemical and analytical studies to identify the contents and distribution of toxic and other associated elements in technogenic waste from NMMC mining enterprises, soils, and plants in connection with their impact on the ecology of the environment. Study of geochemical features of the productive valuable and toxic element`s behavior in space and time in industrial waste area Geological and geochemical mapping of soil, plants and water sources. Study of the chemical composition, behavior and forms of occurrence of toxic elements (in soils, water streams, dust, gases, smoke) in the water area and in the vicinity of the Navoi Mining and Metallurgical Combine - geochemical ecology. As a result of investigations of initial samples by using mass spectrometric analysis, the limits of fluctuations and average contents of not only toxic elements, but also other associated elements were revealed.

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Re-Os Geochronology and Sulfur Isotopes of the Lyangar W-Mo Deposit: Implications for Permian Tectonic Setting in South Tianshan Orogen, Uzbekistan

Cited by 4 publications

References 50 publications

Identification of mineral associations in skarn-rare-metallic deposits in Western Uzbekistan

Identification of mineral associations in skarn-rare-metallic deposits in Western Uzbekistan

Extremely fractionated magmas linked with W mineralization: Evidence from the LyangarW‐Modeposit, South Tianshan Orogenic Belt

Geoecological and geochemical assessment of the impact of NMMC mining enterprises on the environment

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