The Zaderzhninskoe gold deposit: Mineral composition, fluid inclusions, and age (South Verkhoyansk region)

This article discusses the peculiarities of mineral composition and a fluid inclusions (FIs further in the text) study of the Kholtoson W and Inkur W deposits located within the Dzhida W-Mo ore field (Southwestern Transbaikalia, Russia). The Mo mineralization spatially coincides with the apical part of the Pervomaisky stock (Pervomaisky deposit), and the W mineralization forms numerous quartz veins in the western part of the ore field (Kholtoson vein deposit) and the stockwork in the central part (Inkur stockwork deposit). The ore mineral composition is similar at both deposits. Quartz is the main gangue mineral; there are also present muscovite, K-feldspar, and carbonates. The main ore mineral of both deposits is hubnerite. In addition to hubnerite, at both deposits, more than 20 mineral species were identified; they include sulfides (pyrite, chalcopyrite, galena, sphalerite, bornite, etc.), sulfosalts (tetrahedrite, aikinite, stannite, etc.), oxides (scheelite, cassiterite), and tellurides (hessite). The results of mineralogical and fluid inclusions studies allowed us to conclude that the Inkur W and the Kholtoson W deposits were formed by the same hydrothermal fluids, related to the same ore-forming system. For both deposits, the fluid inclusion homogenization temperatures varied within the range ~195–344 °C. The presence of cogenetic liquid- and vapor-dominated inclusions in the quartz from the ores of the Kholtoson deposit allowed us to estimate the true temperature range of mineral formation as 413–350 °C. Ore deposition occurred under similar physical-chemical conditions, differing only in pressures of mineral formation. The main factors of hubnerite deposition from hydrothermal fluids were decreases in temperature.

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Genesis of the Xinfang Gold Deposit, Liaodong Peninsula: Insights from Fluid Inclusions and S-Sr Isotopic Constraints

Journal of Earth Science ◽

10.1007/s12583-020-1074-7 ◽

2021 ◽

Vol 32 (1) ◽

pp. 68-80

Author(s):

Shuaijie Liu ◽

Bin Chen ◽

Jiahao Zheng ◽

Chuang Bao ◽

Guochun Zhao

Keyword(s):

Gold Deposit ◽

Fluid Inclusions ◽

Liaodong Peninsula ◽

Isotopic Constraints

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Microthermometric and stable isotopic (O and H) characteristics of fluid inclusions in the porphyry related Çöpler (İliç - Erzincan) gold deposit, central eastern Turkey

Open Geosciences ◽

10.2478/s13533-012-0173-0 ◽

2014 ◽

Vol 6 (2) ◽

Cited By ~ 2

Author(s):

Oktay Canbaz ◽

Ahmet Gökce

Keyword(s):

Gold Deposit ◽

Fluid Inclusions ◽

Native Gold ◽

Homogenization Temperature ◽

Early Mesozoic ◽

Wide Range ◽

Stable Isotopic ◽

Water Field ◽

Two Phases ◽

Opaque Minerals

AbstractThe Çöpler gold deposit occurs within the stockwork of quartz hosted by the Çöpler granitoid (Eosen) and by surrounding metasediments of Keban metamorphic (Late Paleozoic - Early Mesozoic) and the Munzur limestones (Late Carboniferous - Early Cretaceous).Native gold accompanied by small amounts of chalcopyrite, pyrite, magnetite, maghemite, hematite, fahlerz, marcasite, bornite, galena, sphalerite, specular hematite, goethite, lepidochrosite and bravoitic pyrite within the stockwork ore veinlets. In addition, epidote (pistazite - zoisite), garnet, scapolite, chlorite, tremolite/actinolite, muscovite and opaque minerals were determined within the veinlets occurred in skarn zones.The study of fluid inclusions in quartz veinlets showed that the hydrothermal fluids contain CaCl2, MgCl2 and NaCl and the salinities of the two phases (L+V) inclusions range from 1.7 to 20.6% NaCl equivalent. Salinity values up to 44% were determined within the halite bearing three phases inclusions. Their homogenization temperature values have a wide range from 145.0 to 380.0°C, indicative of catathermal/hypothermal to epithermal conditions. The δ 18O and δD values of the fluid inclusion waters from the Çöpler granitoid correspond to those assigned to Primary Magmatic Water, those from the metasediments of Keban metamorphics fall outside of the Primary Magmatic and are within the Metamorphic Water field. A sample from a quartz vein within the skarn zone hosted by the Munzur limestones has a particularly low δD value.The results suggest that fluids derived from the granitoids were mixed with those derived from the metasediments of Keban metamorphics and the the Munzur limestones and resulting in quartz veinlets in these lithologies and the formation of stockwork ores. In view of the occurrence, the features described and processes envisaged for this study area may be applicable in similar settings.

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Fluid evolution and ore genesis of the Lianhuashan lode gold deposit, northern North China Craton: evidence from fluid inclusions and H–O–C–S–Pb isotopes

Arabian Journal of Geosciences ◽

10.1007/s12517-021-08850-1 ◽

2021 ◽

Vol 14 (23) ◽

Author(s):

Kaituo Shi ◽

Keyong Wang ◽

Rui Wang

Keyword(s):

Gold Deposit ◽

Fluid Inclusions ◽

North China Craton ◽

North China ◽

Pb Isotopes ◽

Ore Genesis ◽

Lode Gold ◽

Fluid Evolution ◽

Lode Gold Deposit

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The Mineral Characteristics and Occurrence of Gold in Nali Gold Deposit, Guangxi

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.936.2383 ◽

2014 ◽

Vol 936 ◽

pp. 2383-2388

Author(s):

Zhi Wen Li ◽

Cheng Dong Liu ◽

Xuan Qing Zhao ◽

Jian Hui Lu ◽

Guo Lin Guo

Keyword(s):

Gold Deposit ◽

Mineral Composition ◽

Electron Probe ◽

Mining Area ◽

Optical Microscope ◽

Analysis Techniques ◽

Mineral Characteristics ◽

Ore Minerals

Using the analysis techniques of polarizing optical microscope and electron probe, mineral composition, ore texture and structure and the occurrence of Au in the primary ore are studied. The research shows that the main ore minerals in the ore include realgar, pyrite and arsenopyrite etc. Sulfur-stibarsen is the main carrier of Au, and is the major associated mineral of realgar, surrounded mainly by realgar, and partly is the associated mineral of arsenopyrite. The existence of visible gold and microscopic gold in the ore of this mining area can be excluded, and the gold might exist mainly in the form of inclusion gold, which is the so-called “nanoAu”.

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Fluid Inclusions and Rare Earth Elements of the Badu Gold Deposit, Guangxi, China: Implications for Mineralization

Acta Geologica Sinica - English Edition ◽

10.1111/1755-6724.12379_29 ◽

2014 ◽

Vol 88 (s2) ◽

pp. 1118-1119 ◽

Cited By ~ 2

Author(s):

Peirong LI ◽

Baocheng PANG ◽

Baohua WANG ◽

Yuanqiang LI ◽

Yequan ZHOU ◽

...

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Gold Deposit ◽

Fluid Inclusions

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Petrogenesis of Ultramafic Lamprophyres from the Terina Complex (Chadobets Upland, Russia): Mineralogy and Melt Inclusion Composition

Minerals ◽

10.3390/min10050419 ◽

2020 ◽

Vol 10 (5) ◽

pp. 419 ◽

Cited By ~ 2

Author(s):

Ilya Prokopyev ◽

Anastasiya Starikova ◽

Anna Doroshkevich ◽

Yazgul Nugumanova ◽

Vladislav Potapov

Keyword(s):

Mineral Composition ◽

Fractional Crystallization ◽

Fluid Inclusions ◽

Siberian Craton ◽

Melt Inclusions ◽

Melt Inclusion ◽

Inclusion Composition ◽

Accessory Minerals ◽

Secondary Minerals ◽

Peridotite Mantle

The mineral composition and melt inclusions of ultramafic lamprophyres of the Terina complex were investigated. The rocks identified were aillikites, mela-aillikites, and damtjernites, and they were originally composed of olivine macrocrysts and phenocrysts, as well as phlogopite phenocrysts in carbonate groundmass, containing phlogopite, clinopyroxene and feldspars. Minor and accessory minerals were fluorapatite, ilmenite, rutile, titanite, and sulphides. Secondary minerals identified were quartz, calcite, dolomite, serpentine, chlorite, rutile, barite, synchysite-(Ce), and monazite-(Ce). Phlogopite, calcite, clinopyroxene, Ca-amphibole, fluorapatite, magnetite, and ilmenite occurred as daughter-phases in melt inclusions. The melt inclusions also contained Fe–Ni sulphides, synchysite-(Ce) and, probably, anhydrite. The olivine macrocrysts included orthopyroxene and ilmenite, and the olivine phenocrysts included Cr-spinel and Ti-magnetite inclusions. Crystal-fluid inclusions in fluorapatite from damtjernites contain calcite, clinopyroxene, dolomite, and barite. The data that were obtained confirm that the ultramafic lamprophyres of the Terina complex crystallized from peridotite mantle-derived carbonated melts and they have not undergone significant fractional crystallization. The investigated rocks are considered to be representative of melts that are derived from carbonate-rich mantle beneath the Siberian craton.

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