Geochronology and geochemistry of the granitoids and ore – forming age in the Xiaoyao tungsten polymetallic skarn deposit in the Jiangnan Massif tungsten belt, China: Implications for their petrogenesis, geodynamic setting, and mineralization

Su, Qiangwei; Mao, Jingwen; Wu, Sheng-Hua; Zhang, Zhaochong; Xu, Shengfa

doi:10.1016/j.lithos.2017.11.007

Cited by 44 publications

(13 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Granodiorite has a zircon U-Pb isotope age of 149.4 ± 1.1 Ma, which is consistent with the molybdenite Re-Os age (148.7 ± 2.5 Ma) at the Xiaoyao deposit, suggesting that it is genetically related to skarn formation and mineralization [28]. Paragenetic studies on textural and physicochemical data show that the Xiaoyao skarn may be classified as an oxidized tungsten deposit that can form in an evolving magmatic-hydrothermal system.…”

Section: Implication For Ore-forming Processesmentioning

confidence: 52%

“…The representative trace element analyses from LA-ICP-MS on garnet, pyroxene and scheelite are listed in Table 3; and the chondrite-normalized REE patterns are shown in Figure 7 Sch3 has different REE patterns in a single grain and varying total REE contents of 162.9-890.1 ppm (Figure 7e The chondrite values are from [33]. The granodiorite data are from [28].…”

Section: Trace Element Geochemistrymentioning

confidence: 99%

“…Cathodoluminescence The granitic intrusion in the Xiaoyao mine area comprises granodiorite, granite, and granite porphyry ( Figure 2). The granodiorite has a U-Pb zircon age of 149.4 ± 1.1 Ma [28]. The granodiorite The granitic intrusion in the Xiaoyao mine area comprises granodiorite, granite, and granite porphyry ( Figure 2).…”

Section: Introductionmentioning

confidence: 99%

“…The granodiorite The granitic intrusion in the Xiaoyao mine area comprises granodiorite, granite, and granite porphyry ( Figure 2). The granodiorite has a U-Pb zircon age of 149.4 ± 1.1 Ma [28]. The granodiorite consists mainly of plagioclase (50-55%), K-feldspar (10-15%), quartz (20-25%), biotite (15-20%), and hornblende (3%-5%), with minor apatite, zircon, magnetite, and titanite.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Geochemistry and Origin of Scheelites from the Xiaoyao Tungsten Skarn Deposit in the Jiangnan Tungsten Belt, SE China

Mao

Sun

et al. 2020

Minerals

Self Cite

View full text Add to dashboard Cite

The type, association, variations, and valence states of several metal elements of scheelite can trace the source and evolution of the ore-forming fluids. There are four types of scheelite from the Xiaoyao deposit: (1) scheelite intergrown with garnet in the proximal zone (Sch1a) and with pyroxene in the distal zone (Sch1b), (2) scheelite replaced Sch1a (Sch2a) and crystallized as rims around Sch1b (Sch2b), (3) quartz vein scheelite with oscillatory zoning (Sch3), and 4) scheelite (Sch4) within micro-fractures of Sch3. Substitutions involving Mo and Cd are of particular relevance, and both elements are redox-sensitive and oxidized Sch1a, Sch2b, Sch3 are Mo and Cd enriched, relatively reduced Sch1b, Sch2a, Sch4 are depleted Mo and Cd. Sch1a, Sch2a, Sch3, and Sch4 are characterized by a typical right-inclined rare earth element (REE) pattern, inherited from ore-related granodiorite and modified by the precipitation of skarn minerals. Sch1b and Sch2b are characterized by low light rare earth element/heavy rare earth element (LREE/HREE) ratios, influenced by a shift in fO 2 during fluid-rock alteration. Sch1b, Sch2b and Sch3 have higher Sr contents than those of Sch1a and Sch2a, reveal that host-rock alteration and fluid-rock interaction have elevated Sr contents. The Y/Ho ratios of scheelite gradually increase from skarn to quartz vein stages, due to fluid fractionation caused by fluid-rock interaction. Thus, the variation in REE and trace elements in scheelite in time and space reflects a complex magmatic-hydrothermal process involving various fluid-rock interactions and fluid mixing.Minerals 2020, 10, 271 2 of 22 (CL) imaging has been proven to be an effective technique to reveal internal textures, zoning and trace element distributions in scheelite [3]. However, previous studies did not evaluate dissolution and re-precipitation processes in scheelite from tungsten skarn deposits due to the changing hydrothermal fluids [13,14]. The detailed textural characterization and systematic investigations of scheelite from each stage prior to in situ chemical analysis are critical to constraint the evolution of skarn systems and W ore precipitation.The Jiangnan tungsten belt in the southeastern margin of the Yangtze Craton is a new giant tungsten province with WO 3 reserves over 5.0 million tons [19][20][21][22][23], including the Dahutang (reserves of 1.10 Mt and grade of 0.18%) and the Zhuxi (reserves of 3.44 Mt and grade of 0.54%) deposits, as well as other large-scale tungsten deposits, such as Yangchuling, Xiaoyao, Dongyuan, Zhuxiling deposits [24][25][26]. The present study focuses on the Xiaoyao tungsten skarn deposit, characterized by complex scheelite textural features. The Xiaoyao deposit has reserves of 75,000 tons of WO 3 with an average grade of 0.2% [27]. We present both textural and compositional features for scheelite from the Xiaoyao deposit to evaluate the importance of dissolution and re-precipitation processes in the formation of skarn-related scheelite.

show abstract

Section: Implication For Ore-forming Processesmentioning

confidence: 52%

Section: Trace Element Geochemistrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Geochemistry and Origin of Scheelites from the Xiaoyao Tungsten Skarn Deposit in the Jiangnan Tungsten Belt, SE China

Mao

Sun

et al. 2020

Minerals

Self Cite

View full text Add to dashboard Cite

show abstract

“…发地壳物质重熔, 形成了壳源花岗质岩石及江南钨矿带, 而俯冲板片重熔则形成长江中下游铜矿带, 初步提出其成矿动力学模型(图3(a)) [37,38] . 的岩浆类型, 包括S型和I型花岗质岩石 [5] , 甚至由于中基性-基性火山岩的存在, 在岩浆-热液活动过程中, 其中富含的铜元素被淋滤出并携带进入成矿系统 [37,107] , ; 而当震旦纪、寒武纪和奥陶纪碳酸盐岩与砂页岩互层为围岩, 则形成似层状钨矿体或锡矿体, 例如, 逍遥、香炉山、百丈岩、曾家垄和鸡头山等 [45,46,47,108,109] . [110] .…”

Section: 推测俯冲板片沿这些部位撕裂导致软流圈上升并引unclassified

The world-class Jiangnan tungsten belt: Geologicalcharacteristics, metallogeny, and ore deposit model

Mao

Song

et al. 2020

Chin. Sci. Bull.

Self Cite

View full text Add to dashboard Cite

Petrogenesis of the Late Mesozoic gabbros in the eastern Jiangnan Orogen, South China: Characteristics of the lithospheric mantle

Wang

Yan

et al. 2020

Geological Journal

View full text Add to dashboard Cite

As we know, mantle‐derived mafic rocks can be used to effectively trace the nature of the mantle source and constrain the regional tectonic setting and evolution. Recently, a Late Mesozoic mafic intrusive body (Huangmao pluton) has been found in the eastern Jiangnan Orogen (EJO). In this study, we investigate this pluton using petrography, whole‐rock geochemistry, Sr–Nd–Pb isotopes, and geochronology. The Huangmao pluton is primarily composed of a fine‐grained gabbro‐diabase, which is characterized by consistent SiO2, MgO, Fe2O3T, and TiO2 contents. These gabbros exhibit continental crust‐like trace element signatures, i.e., enriched in large‐ion lithophile elements (LILE), Pb, and light rare earth elements (LREE), but depleted in high‐field‐strength elements (HFSE). In addition, the Huangmao gabbros have moderate initial 87Sr/86Sr ratio (0.7065–0.7080) and slightly negative to weakly positive εNd(t) value (−2.06 to +0.84). Finally, U–Pb zircon dating confirms that the Huangmao pluton was emplaced in the Late Jurassic (152.6 ± 3.1 Ma). Through an integrated geochemical analysis, these Late Mesozoic gabbros were genetically originated from an enriched lithospheric mantle source, which formed by a metasomatic reaction between mantle peridotite and sediment‐derived felsic melt. Consequently, the lithologies of the metasomatite were predominantly pyroxenites with a small amount of pyroxene‐rich peridotites. Considering the large distance between the modern trench and the EJO, the flat‐slab subduction and rollback model of the palaeo‐Pacific Plate is the most reasonable interpretation of the geodynamic setting that resulted in Late Mesozoic magmatism in the EJO.

show abstract

Geochronology and geochemistry of the granitoids and ore – forming age in the Xiaoyao tungsten polymetallic skarn deposit in the Jiangnan Massif tungsten belt, China: Implications for their petrogenesis, geodynamic setting, and mineralization

Cited by 44 publications

References 52 publications

Geochemistry and Origin of Scheelites from the Xiaoyao Tungsten Skarn Deposit in the Jiangnan Tungsten Belt, SE China

Geochemistry and Origin of Scheelites from the Xiaoyao Tungsten Skarn Deposit in the Jiangnan Tungsten Belt, SE China

The world-class Jiangnan tungsten belt: Geologicalcharacteristics, metallogeny, and ore deposit model

Petrogenesis of the Late Mesozoic gabbros in the eastern Jiangnan Orogen, South China: Characteristics of the lithospheric mantle

Contact Info

Product

Resources

About