Alteration and mineralization styles of the orogenic disseminated Zhenyuan gold deposit, southeastern Tibet: Contrast with carlin gold deposit

Li, Huajian; Wang, Qingfei; Deng, Jun; Yang, Lin; Dong, Chaoyi; Yu, Huazhi

doi:10.1016/j.gsf.2019.01.008

Cited by 32 publications

(2 citation statements)

References 61 publications

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“…Mineralization styles mainly occur as thick quartz veins, quartz-vein arrays, and replacement and disseminated ores, which are mostly hosted in the greenschist-facies sedimentary or mafic rocks. The Au of orogenic gold deposits precipitate from the low-salinity H 2 O-CO 2 (CH 4 , N 2 ) fluid through the sulfidation during fluid-rock interaction or fluid phase separation during hydrofracturing (Li et al, 2019a(Li et al, , b, 2022Yang et al, 2022), and the host structures mainly include anticlines, fault jogs or fault intersections (Fig. 12b; Groves et al, 1998Groves et al, , 2005Groves et al, , 2018Goldfarb and Groves, 2015;Wang et al, 2020bWang et al, , 2021.…”

Section: Contrast Between Jiaodong-type Orogenic and Intrusion-relate...mentioning

confidence: 99%

The Formation of the Jiaodong Gold Province

Deng

WANG

LIU

et al. 2022

Acta Geologica Sinica (Eng)

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Gold deposits in Jiaodong, termed Jiaodong‐type, are tectonically located in the southeastern margin of the North China Craton. Their major features are reviewed in this paper to highlight the differences between Jiaodong deposits and other genetic types of gold deposits. The mineralization was synchronized with asthenosphere upwelling indicated by syn‐ore OIB‐like mafic dike and large‐scale crustal thinning suggested by decrease of Sr/Y from pre‐ore to syn‐ore granites. Asthenosphere upwelling induced by the roll‐back of Paleo‐Pacific Plate drove partial melting of lithospheric mantle and devolatilization, which induced the release of the ore‐forming fluids. In concomitant with magmatic records, mineralization migrated from the western Jiaobei terrane (133–127 Ma) to the eastern Sulu orogenic belt (114–108 Ma), corresponding to the eastward roll‐back of Paleo‐Pacific Plate. Gold mineralization in Jiaodong formed in the transitions of ductile to brittle deformation, rapid to slow crustal uplift, and regional compression to extension. In the regional‐scale, the gold deposits in the Jiaobei terrane are mostly situated at intersections between NE‐trending faults and EW‐trending basement faults, and gold orebodies dominantly controlled by the lithologic contacts between Precambrian metamorphic rocks and Mesozoic granites. The mineralization was dominated by the disseminated‐veinlet ores related to quartz–sericite alteration in strong cataclasite‐breccia zone, with subsidiary thick quartz‐sulfide veins developed in secondary fault zones. The ore‐forming fluids belong to a H2O–CO2–NaCl±CH4 system and show minor variations in salinity among different types of ore. Structure‐fluid feedback involving fluid‐rock reaction and hydrofracturing triggered the fluid phase separation and resultant gold deposition. The Jiaodong gold deposits are distinct from orogenic and intrusion‐related gold deposits in terms of tectonic setting, origin of ore‐forming fluids, and mechanism of gold deposition.

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Section: Contrast Between Jiaodong-type Orogenic and Intrusion-relate...mentioning

confidence: 99%

The Formation of the Jiaodong Gold Province

Deng

WANG

LIU

et al. 2022

Acta Geologica Sinica (Eng)

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“…Gold deposits are widely developed in the various ore provinces of the world. In the literature, a significant proportion of hydrothermal vein gold deposits are classified as orogenic in metamorphic terranes, and they display large variations in their mineralization age and style [1][2][3][4][5]. A feature of the mineral composition of these deposits is the constant presence of pyrite and arsenopyrite in varying proportions.…”

Section: Introductionmentioning

confidence: 99%

Gold–Sulfide Mineralization in the Manitanyrd Region, Polar Urals, Russia

et al. 2023

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This article describes the characteristics of gold–sulfide–quartz and gold–sulfide (gold–arsenic) ore occurrences in the Manitanyrd region of the Polar Urals. Ore occurrences are confined to NE-trending shear zones and have the common features of a geological structure. The host rocks are metamorphosed volcanic and volcanic–sedimentary rocks. We analyzed the mineral and chemical composition of the ore mineralization in all studied ore occurrences, showing that they belong to the same mineral type—pyrite–arsenopyrite, with a variable ratio of the main minerals. Arsenic pyrite is present in all ore occurrences. Two stages of ore formation were distinguished: early gold–pyrite–arsenopyrite with finely dispersed gold and late gold–galena–chalcopyrite–sphalerite with coarse gold, fahlore, and sulfosalts Pb, Cu, Bi, Sb. Native gold of the first generation, finely dispersed in arsenopyrite and pyrite, had an average to high fineness (800‰–1000‰) with a relatively low dispersion. Native gold of the second generation was larger, and its fineness in ore occurrences varied; in one of them, it varied from 300‰ to 950‰, while in others, it varied from 800‰ to 950‰. The isotope composition of sulfur in sulfides (δ34S) ranged between −0.2‰ and −8.0‰. δ34S values of sulfides in the range of −0.2‰ to −3.5‰ were similar to meteorite, indicating the participation of a single deep magmatic source of sulfur in the ore formation. According to the study of fluid inclusions, the formation of ore quartz veins occurs in the temperature range of 467–109 °C. The similarity of the geological–structural, mineralogical–geochemical, and isotope–geochemical features of the gold–sulfide–quartz and gold–sulfide occurrences in the area suggest their formation in a single hydrothermal system.

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Formation, Preservation, and Metallogenic Fertility of Juvenile Crust in the Eastern Tethyan Collisional Orogens

Hou

2024

Modern Approaches in Solid Earth Sciences

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Alteration and mineralization styles of the orogenic disseminated Zhenyuan gold deposit, southeastern Tibet: Contrast with carlin gold deposit

Cited by 32 publications

References 61 publications

The Formation of the Jiaodong Gold Province

The Formation of the Jiaodong Gold Province

Gold–Sulfide Mineralization in the Manitanyrd Region, Polar Urals, Russia

Formation, Preservation, and Metallogenic Fertility of Juvenile Crust in the Eastern Tethyan Collisional Orogens

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