Petrologic genesis of ore-bearing porphyries in Tiegelongnan giant Cu (Au, Ag) deposit, Tibet and its implications for the dynamic of Cretaceous mineralization, Duolong

林彬,; Lin, Bin; 方向,; Fang, Xiang-Min; 王艺云,; Wang, Yi-Yun; 杨欢欢,; Yang, Huanhuan; 贺文,; Wen, He

doi:10.18654/1000-0569/2019.03.03

Cited by 15 publications

(10 citation statements)

References 42 publications

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“…Magmatic emplacements and mineralizations are relevant to the E–W‐ and NE‐trending faults, whose intersections are favourable places for mineral prospecting. The NW‐trending faults formed later than regional mineralization and destroyed parts of the earlier ore bodies (Lin et al, 2019).…”

Section: Regional Geologymentioning

confidence: 99%

“…It is also the second porphyry‐epithermal mineralization system with more than 10 million tons of Cu resources and 100 tons of Au resources in a single deposit in the Chinese mainland (the first one being the Zijinshan deposit, with 2.32 million tons of Cu resources and 310 tons of Au resources developed; W. Y. Liu, 2015). The deposit geology (Li et al, 2015; Tang et al, 2014, 2016; Y. Y. Wang et al, 2018), geochronology (Fang et al, 2015; Lin et al, 2019; Lin, Tang, et al, 2017; Q. Wang et al, 2015; H. H. Yang, Fang, et al, 2022; X. N. Zhang et al, 2018), hydrothermal fluids (He et al, 2017; Sun et al, 2015; C. Yang et al, 2014), ore‐forming material sources (Lin, Tang, et al, 2017; Y. Y. Wang et al, 2017), preservation and denudation (Song et al, 2017; H. H. Yang, Fang, et al, 2022; H. H. Yang, Wang, et al, 2022) of this deposit have all been previously investigated.…”

Section: Introductionmentioning

confidence: 99%

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Geology and metallogenesis of the Tiegelongnan Cu–Au–Ag deposit, Duolong ore district, Tibet

et al. 2022

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The Tiegelongnan deposit is a giant deposit (>10 million tons Cu resources with an average grade of 0.53%) located in the west of the Bangong Co‐Nujiang metallogenic Belt, where typical porphyry and epithermal types of alteration and mineralization are developed. A compilation of geological features and mineralogical studies revealed that the Tiegelongnan deposit developed two stages of hydrothermal alteration. The early stage was related to porphyry emplacement, developing potassic, phyllic and propylitic alterations, telescoped by the late advanced argillic alteration in the shallow levels. Correspondingly, two stages of mineralization occurred, the early porphyry‐type mineralization being overlapped by the late high‐sulfidation epithermal mineralization. Due to differences in pH, log fO2, K+ activity and temperature of ore‐forming fluids, distinct sulfide minerals of low to extremely high sulfidation states, such as chalcopyrite, tennantite, enargite and covellite, precipitated throughout the entire hydrothermal process. The Tiegelongnan deposit is a complex porphyry metallogenetic system of ‘multiple structures’. The Early Cretaceous andesitic volcanic rocks of the Meiriqiecuo Formation exposed on the surface act as a cap for the ore body, beneath which an oxidizing‐leaching zone lies. Under the cap and the oxidizing‐leaching zone, a porphyry ore body is remoulded by high‐grade high‐sulfidation epithermal hydrothermal mineralization, which gradually transitions to continuous porphyry‐type mineralization at depth.

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Section: Regional Geologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geology and metallogenesis of the Tiegelongnan Cu–Au–Ag deposit, Duolong ore district, Tibet

et al. 2022

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“…The Duolong area is approximately 50 km long and 18 km wide and is one of the biggest porphyry Cu regions in China. In addition to the five major porphyry deposits, it also hosts three small deposits, namely, Gaerqin, Sena, and Nadun, and several porphyry prospects (Figure 5; Li et al, 2017a;Zhu et al, 2015c;Lin et al, 2019b). These porphyry deposits in the BNMB are associated with Cretaceous porphyries.…”

Section: Porphyry Copper Depositsmentioning

confidence: 99%

“…The sedimentary rocks consist of conglomerate, sandstone, metamorphic siltstone, and slate (Figure 3). The Early Cretaceous andesite in the Duolong district is recognized as post-ore cover that protects the ore deposits, such as Frontiers in Earth Science frontiersin.org the Tiegelongnan deposit, from erosion (Lin et al, 2017;Song et al, 2017;Tang et al, 2017;Song et al, 2018;Lin et al, 2019b;Yang et al, 2020a;Yang et al, 2020b). The Early Cretaceous andesite in the central BNSZ and NLB hosts several porphyry deposits, such as the Wugacuo and Saideng deposits (Wang et al, 2017a;Wang et al, 2017b;CGS report).…”

Section: Magmatismmentioning

confidence: 99%

“…The accretionary wedge, along with the northward subduction of the Bangong-Nujiang oceanic crust, provides the main geological background for the formation of the Duolong world-class ore cluster. All deposits in the Duolong district are associated with the Early Cretaceous (123-115 Ma) intermediate-felsic porphyries (Lin et al, 2019a;Lin et al, 2019b;Yang et al, 2020a) and are characterized by abundant F, Cl, Cu, and Au in a high oxidation state. These intermediate-felsic porphyries contributed to the formation of the Duolong porphyry Cu-Au deposit (Li et al, 2013;Li et al, 2014;Li et al, 2015;Li et al, 2016).…”

Section: Relationship With Tectonic Evolutionmentioning

confidence: 99%

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Metallogeny in the Bangong–Nujiang belt, central Tibet, China: A review

et al. 2023

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The Bangong–Nujiang metallogenic belt consists of scattered Tethyan oceanic blocks, mainly distributed underneath the margins of the Qiangtang and Lhasa terranes in central Tibet. A new world-class metallogenic belt has been reported in this region recently, based on the geological mapping and ore deposit prospecting over the last two decades. It currently comprises inferred resources of 30 Mt Cu and 500 t Au, together with several Cr–Ni, Fe, and W (Mo) resources, forming a significant potential area for future mineral exploration. These metals are mainly hosted in porphyry copper, skarn copper, skarn iron, orogenic gold, quartz-vein tungsten, and ophitic chromite deposits. The mineral deposits in the Bangong–Nujiang metallogenic belt have been widely recognized in different localities, including the southern edge of the southern Qiangtang block, part of the north Lhasa block, and even part of the central Lhasa block, indicating they were formed in variable geological settings, from the initial opening, subduction, and collision to the extension of the Bangong–Nujiang Ocean. Specifically, five major tectonic events contributed to mineralization, including the stage 1 (240–165 Ma) initial opening of the Bangong–Nujiang Ocean, stage 2 (165–145 Ma) oceanic subduction, stage 3 (145–100 Ma) close of the ocean, stage 4 (100–65 Ma) continent–continent collisional orogenesis, and stage 5 (65–0 Ma) post-orogenesis. At stage 1, Cr–Ni deposits were formed during the initial opening of the ocean; porphyry–epithermal Cu (Au), skarn Fe, and minor orogenic Au deposits were formed at stage 2 and stage 3; a younger pulse of a few porphyry–skarn Cu ± Mo and orogenic Au deposits were formed during stage 4; finally, W(Mo) deposits were generated in stage 5. In general, porphyry Cu systems, orogenic Au, and skarn Cu polymetallic deposits that occurred in the subduction and post-collision settings related W(Mo) deposits have the most potential for future exploration. An in-depth investigation of several scientific problems, such as addressing the tectonic setting, magmatism, and metallogeny of this region and genetic linkage of these deposit preservations to plateau uplift, is essential for the future success of exploration in the Bangong–Nujiang metallogenic belt.

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Exploring a lost ocean in the Tibetan Plateau: Birth, growth, and demise of the Bangong-Nujiang Ocean

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et al. 2022

Earth-Science Reviews

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Petrologic genesis of ore-bearing porphyries in Tiegelongnan giant Cu (Au, Ag) deposit, Tibet and its implications for the dynamic of Cretaceous mineralization, Duolong

Cited by 15 publications

References 42 publications

Geology and metallogenesis of the Tiegelongnan Cu–Au–Ag deposit, Duolong ore district, Tibet

Geology and metallogenesis of the Tiegelongnan Cu–Au–Ag deposit, Duolong ore district, Tibet

Metallogeny in the Bangong–Nujiang belt, central Tibet, China: A review

Exploring a lost ocean in the Tibetan Plateau: Birth, growth, and demise of the Bangong-Nujiang Ocean

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