Magmatic-hydrothermal evolution of the Cretaceous Duolong gold-rich porphyry copper deposit in the Bangongco metallogenic belt, Tibet: Evidence from U-Pb and 40Ar/39Ar geochronology

Li, Jinxiang; Qin, Kezhang; Li, Guangming; Xiao, Bo; Zhao, Jun‐Hong; Chen, Lei

doi:10.1016/j.jseaes.2011.03.008

Cited by 110 publications

(68 citation statements)

References 44 publications

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“…Duobuza and Bolong porphyry Cu-Au deposits are situated in the study area, and are referred to together as the Duolong PCD (Figure 1c). In this region, the stratigraphy mainly consists of the Middle Jurassic Quse group (MJQ), the Middle-Lower Jurassic Sewa group (MLJS), the Late Cretaceous Meiriqie group (LCM), the Paleogene Kangtuo group (PK), and the Quaternary (Q) (Figure 1c) [11,14]. The regional intrusive rocks were mainly formed in the Middle-Late Yanshan period and all the mineralized porphyries are granodiorite porphyries.…”

Section: Geological Settingmentioning

confidence: 99%

“…Duobuza PCD with a core of mineralized porphyry is surrounded by multiple zones, including the potassic zone, pyritization-phyllic zone, argillic zone, and propylitic zone [11,52]. The pyritization-phyllic zone, argillic zone, and propylitic zone are exposed on the ground surface.…”

Section: Geological Settingmentioning

confidence: 99%

“…The numerous additional and apparently false anomalies in the western area of Duolong PCD are also highlighted (Figure 10a, sites 1 and 3), where the stratigraphy consists of the PK group (Figure 10a, site 1) and the LCM group (Figure 10a, site 3). The LCM group contains dark-red basaltic andesite, dacite and volcanic-clastic rocks that are mainly composed of plagioclase, hornblende and minor pyroxene, and the PK group contains brown-red clay and sandy gravel, and main minerals composed of carbonate, a little chlorite and pyrite [11,52]. The false anomalies in these areas correlate with not only the iron-bearing content but also the low albedo of it.…”

Section: Ferric and Ferrous Iron Abundancementioning

confidence: 99%

“…At present, three porphyry copper belts, namely Yulong, Gangdisi, and Bangong Co-Nujiang River [7][8][9][10][11], have been found in the Tibetan Plateau. Their representative deposits are the PCDs of Yulong, Qulong, and Duolong.…”

Section: Introductionmentioning

confidence: 99%

“…Their representative deposits are the PCDs of Yulong, Qulong, and Duolong. All of them are on either a large or ultra-large scale [7][8][9][10][11][12][13][14], thereby showing great potential for Cu prospecting in the Tibetan Plateau. However, because of its remoteness, severe climate, and rugged topography, the Tibetan Plateau remains vastly underexplored at this "third pole" of the world.…”

Section: Introductionmentioning

confidence: 99%

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Integrating Data of ASTER and Landsat-8 OLI (AO) for Hydrothermal Alteration Mineral Mapping in Duolong Porphyry Cu-Au Deposit, Tibetan Plateau, China

Zhang

et al. 2016

Remote Sensing

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Abstract:One of the most important characteristics of porphyry copper deposits (PCDs) is the type and distribution pattern of alteration zones which can be used for screening and recognizing these deposits. Hydrothermal alteration minerals with diagnostic spectral absorption properties in the visible and near-infrared (VNIR) through the shortwave infrared (SWIR) regions can be identified by multispectral and hyperspectral remote sensing data. Six Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) bands in SWIR have been shown to be effective in the mapping of Al-OH, Fe-OH, Mg-OH group minerals. The five VNIR bands of Landsat-8 (L8) Operational Land Imager (OLI) are useful for discriminating ferric iron alteration minerals. In the absence of complete hyperspectral coverage area, an opportunity, however, exists to integrate ASTER and L8-OLI (AO) to compensate each other's shortcomings in covering area for mineral mapping. This study examines the potential of AO data in mineral mapping in an arid area of the Duolong porphyry Cu-Au deposit(Tibetan Plateau in China) by using spectral analysis techniques. Results show the following conclusions: (1) Combination of ASTER and L8-OLI data (AO) has more mineral information content than either alone; (2) The Duolong PCD alteration zones of phyllic, argillic and propylitic zones are mapped using ASTER SWIR bands and the iron-bearing mineral information is best mapped using AO VNIR bands; (3) The multispectral integration data of AO can provide a compensatory data of ASTER VNIR bands for iron-bearing mineral mapping in the arid and semi-arid areas.

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Ferric and Ferrous Iron Abundancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Integrating Data of ASTER and Landsat-8 OLI (AO) for Hydrothermal Alteration Mineral Mapping in Duolong Porphyry Cu-Au Deposit, Tibetan Plateau, China

Zhang

et al. 2016

Remote Sensing

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Andesitic crustal growth via mélange partial melting: Evidence from Early Cretaceous arc dioritic/andesitic rocks in southern Qiangtang, central Tibet

Hao

Wang

Wyman

et al. 2016

Geochem. Geophys. Geosyst.

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Deciphering the petrogenesis of andesitic/dioritic rocks is fundamental to understanding the formation of the continental crust. Here we present detailed petrology, geochronology, major and trace element, Sr-Nd-Hf-O isotope data for the Early Cretaceous (122 Ma) dioritic rocks in the Bizha area in southern Qiangtang, Tibet. The dioritic rocks are characterized by large ion lithophile elements, Pb, and light rare earth elements but depletion of high field strength elements with slightly enriched and variable eNd (t)

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Subduction of the Bangong-Nujiang Ocean: constraints from granites in the Bangong Co area, Tibet

et al. 2013

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We report geochronologic, whole‐rock geochemical and Sr–Nd isotopic analyses of the granites that are exposed to both the north and the inside of the Bangong–Nujiang Suture (BNS) zone as well as the implications for the Mesozoic history of Tibet. To the north of the BNS, the Larelaxin pluton consists of I‐type quartz diorite and highly fractionated I‐type biotite granite. The Larelaxin pluton is enriched in large‐ion lithophile elements (LILE) but depleted in high‐field‐strength elements (HFSE); therefore, it exhibits the features of volcanic arc rocks. The initial Sr (0.7102 to 0.7215) and negative εNd (t) (−2.91 to −5.20) values imply a mixture of depleted mantle and continental crust. The mean 206Pb/238U zircon age is 168 Ma; we therefore propose that the Bangong–Nujiang Ocean (BNO) had already been subducted beneath the Qiangtang terrain by the middle Jurassic. Inside the BNS, the Rutog granites intruded into the Lagongtang and Duoren formations, which show a continental margin and a forearc basin sedimentary facies, respectively. The mean 206Pb/238U zircon age is 101 Ma. The Rutog granites are monzogranites with a high Na/K ratio (Na2O/K2O > 1) and a high LILE/HFSE ratio, and A/CNK < 1.1. The high Sr/Y ratio (22 to 56) implies that these granites are adakitic. The low initial Sr (0.7044 to 0.7055) and positive εNd (t) (+1.46 to +2.70) values indicate that the protolith of the Rutog granites originated mainly from a depleted source. We attribute the Rutog plutonism to the development of an oceanic arc during the continuing northward subduction of the BNO and propose that the Rutog adakitic granites were formed by melting of the subducted BNO crust with limited crustal contamination. Copyright © 2013 John Wiley & Sons, Ltd.

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Magmatic-hydrothermal evolution of the Cretaceous Duolong gold-rich porphyry copper deposit in the Bangongco metallogenic belt, Tibet: Evidence from U-Pb and 40Ar/39Ar geochronology

Cited by 110 publications

References 44 publications

Integrating Data of ASTER and Landsat-8 OLI (AO) for Hydrothermal Alteration Mineral Mapping in Duolong Porphyry Cu-Au Deposit, Tibetan Plateau, China

Integrating Data of ASTER and Landsat-8 OLI (AO) for Hydrothermal Alteration Mineral Mapping in Duolong Porphyry Cu-Au Deposit, Tibetan Plateau, China

Andesitic crustal growth via mélange partial melting: Evidence from Early Cretaceous arc dioritic/andesitic rocks in southern Qiangtang, central Tibet

Subduction of the Bangong-Nujiang Ocean: constraints from granites in the Bangong Co area, Tibet

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