Xiongcun, Tibet: A telescoped system of veinlet-disseminated Cu (Au) mineralization and late vein-style Au (Ag)-polymetallic mineralization in a continental collision zone

Xu, Wei; Feng-chu, Pan; Qu, Xiaoming; Hou, Zhenshan; Yang, Zhen; Chen, Weishi; Yang, Dan; Cui, Yanhe

doi:10.1016/j.oregeorev.2009.04.004

Cited by 24 publications

(14 citation statements)

References 54 publications

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“…ferrous iron oxidation) inducing sulfate reduction and corresponding oxygen fugacity fluctuations (Sun et al, 2004;Liang et al, 2009). This is supported by the common occurrence of magnetite in porphyry copper deposits (Vila and Sillitoe, 1991;Mao et al, 2006;Imai et al, 2007b;Khashgerel et al, 2008;Liang et al, 2009;Xu et al, 2009) (Eq. (1)).…”

Section: Introductionmentioning

confidence: 81%

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The link between reduced porphyry copper deposits and oxidized magmas

Sun

Liang

Ling

et al. 2013

Geochimica et Cosmochimica Acta

350

118

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Section: Introductionmentioning

confidence: 81%

“…The Xiongcun (also named as Xietongmen) porphyry Cu-Au deposit is located in the southern rim of the Gangdese orogenic belt in southern Tibet (Tafti et al, 2009;Xu et al, 2009). The Cu-Au mineralization is associated with quartz diorite porphyry, which intrudes the Early Jurassic volcanic sequence (Tafti et al, 2009).…”

Section: Xiongcun Porphyry Cu-au Depositmentioning

confidence: 99%

The link between reduced porphyry copper deposits and oxidized magmas

Sun

Liang

Ling

et al. 2013

Geochimica et Cosmochimica Acta

350

118

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“…Several conceptual models have been proposed to explain the different styles of Cu Porphyry mineralization (Bliss, 1992;Gruen, Heinrich, & Schroeder, 2010;Sillitoe, 1999Sillitoe, , 2010Sillitoe & Gappe, 1984;Volkov et al, 2006;Xu et al, 2009). In Iran, all known porphyry copper mineralization occurs in the Cenozoic UrumiehDokhtar orogenic belt (Figure 1).…”

Section: Conceptual Modelmentioning

confidence: 99%

Predictive Cu porphyry potential mapping using fuzzy modelling in Ahar–Arasbaran zone, Iran

Pazand

Hezarkhani

2018

Geology, Ecology, and Landscapes

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Fuzzy set theory was successfully used to map areas of copper porphyry mineralization potential in the Ahar-Arasbaran district of Iran. Proximity to geological features is translated into fuzzy membership functions based upon qualitative and quantitative knowledge of spatial associations between known Cu porphyry occurrences and geological features in the area. Fuzzy sets of favourable lithology, geochemical anomaly, geophysical anomaly, structural feature, and alterations are combined using fuzzy logic as the inference engine. The fuzzy predictive maps delineate 84% of the known Cu porphyry occurrences. The results demonstrate the usefulness of a geologically constrained fuzzy set approach to map mineral potential and to redirect surficial exploration work in the search for yet undiscovered Cu porphyry mineralization in the mining district. The method described is applicable to other mining districts elsewhere.

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“…A copper-gold epithermal deposit model was suggested by and Xu et al (2005), whereas Qin et al (2005) interpreted the deposits in the Xietongmen district to represent VHMS-type deposits similar to the Eskay Creek deposit in British Columbia, Canada. Xu et al (2009) posited that the Xietongmen deposit is a "telescopic system of veinlet-disseminated" mineralization related to an "immature porphyry system" that was overprinted by a low-sulfidation epithermal system. Regardless of its origin, most previous workers have considered the Xietongmen deposit to be Eocene in age and at least temporally, if not genetically, related to a large Eocene batholith located immediately east of the deposit (e.g., Xu et al, 2006Xu et al, , 2009.…”

Section: Introductionmentioning

confidence: 99%

“…Xu et al (2009) posited that the Xietongmen deposit is a "telescopic system of veinlet-disseminated" mineralization related to an "immature porphyry system" that was overprinted by a low-sulfidation epithermal system. Regardless of its origin, most previous workers have considered the Xietongmen deposit to be Eocene in age and at least temporally, if not genetically, related to a large Eocene batholith located immediately east of the deposit (e.g., Xu et al, 2006Xu et al, , 2009. Tafti et al (2006Tafti et al ( , 2009 and Tafti (2011), followed by Tang et al (2010) and Lang et al (2014), presented more comprehensive data, including wellconstrained isotopic dates, which demonstrate that coppergold mineralization in the Xietongmen district formed in the Middle Jurassic as a cluster of typical copper-gold porphyry deposits in a calc-alkaline magmatic arc setting in the Lhasa terrane prior to its accretion to Asia.…”

Section: Introductionmentioning

confidence: 99%

Geology and Geochronology of the Xietongmen (Xiongcun) Cu-Au Porphyry District, Southern Tibet, China

Tafti

Lang²,

Mortensen

et al. 2014

Economic Geology

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The Xietongmen district is located 260 km west-southwest of Lhasa in the Tibet Autonomous Region, China. The district occurs within the Gangdese belt, which forms the eastern part of the Trans-Himalayan magmatic belt and is the product of complex magmatic activity that began during the Late Triassic or Early Jurassic and ended in the Eocene. The Xietongmen Cu-Au and Newtongmen Cu-Au-Mo deposits contain a total measured and indicated resource of approximately 610 million metric tons, with additional mineralization in the Langtongmen and Olitongmen Cu-Au prospects. Porphyry mineralization in the Xietongmen district formed during Middle Jurassic volcanic arc activity in the Lhasa terrane, prior to its accretion to the southern margin of Eurasia, and establishes that an economically important, but only recently recognized, metallogenic event is present in the region.Rock types in the Xietongmen district range from Early Jurassic to Eocene in age. Early Jurassic (~188−177 Ma) volcanic, volcaniclastic, and coeval intrusive rock types are crosscut by Middle Jurassic (176−171 Ma) hornblende diorite and quartz diorite porphyry dikes and stocks, including intrusions related to porphyry Cu-Au ± Mo mineralization. The Jurassic igneous assemblage was intruded by mafic dikes between the Late Jurassic and the Cretaceous, then by an Eocene (50−47 Ma) biotite granodiorite batholith and related dikes, and finally by, volumetrically minor lamprophyre dikes. The most important structures in the Xietongmen district are four E-striking, moderately N-dipping, sinistral-oblique thrust faults. Crosscutting and suturing relationships between the TSF-2 thrust fault, located in the south part of the district, and intrusions dated to between 174 and 180 Ma constrain the main stage of thrust fault activity to the Middle Jurassic. The Contact and Adit-1 thrust faults truncate the Xietongmen deposit and form the footwall and hanging wall to mineralization, respectively. Numerous zones of cataclasis deform the Xietongmen deposit between these bounding thrust surfaces. The strongly deformed Langtongmen Cu-Au prospect is located ~1.3 km west of the Xietongmen deposit and occurs in the immediate hanging wall of the Adit-1 thrust fault. The Newtongmen deposit and the Olitongmen Cu-Au prospect occur to the north in the hanging wall to the SBF thrust fault and are not strongly deformed.Mineralization and hydrothermal features in the Xietongmen district are fully compatible with porphyry Cu-Au ± Mo deposits. Alteration, vein types, and mineralization are zoned around quartz diorite porphyry intrusions. Early K silicate alteration and related veins occur within and proximal to the intrusions and contain the highest grade mineralization. In the Xietongmen deposit, the grade of mineralization decreases outward from a core of early biotite-rich K silicate alteration, through a transitional zone in which early K silicate alteration is partially overprinted by quartz-sericite-pyrite alteration, to a peripheral zone of poorly mineralized quartz-sericite-pyrit...

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Xiongcun, Tibet: A telescoped system of veinlet-disseminated Cu (Au) mineralization and late vein-style Au (Ag)-polymetallic mineralization in a continental collision zone

Cited by 24 publications

References 54 publications

The link between reduced porphyry copper deposits and oxidized magmas

The link between reduced porphyry copper deposits and oxidized magmas

Predictive Cu porphyry potential mapping using fuzzy modelling in Ahar–Arasbaran zone, Iran

Geology and Geochronology of the Xietongmen (Xiongcun) Cu-Au Porphyry District, Southern Tibet, China

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