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Geochemistry and fluid inclusions of scheelite-mineralized granodiorite porphyries from southern Anhui Province, China

Published on Oct 1, 2017in Ore Geology Reviews3.39
· DOI :10.1016/j.oregeorev.2017.08.004
Yangyang Wang1
Estimated H-index: 1
(GAU: University of Göttingen),
Alfons van den Kerkhof12
Estimated H-index: 12
(GAU: University of Göttingen)
+ 4 AuthorsYinggeng Wang1
Estimated H-index: 1
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Abstract
Abstract We report petrological, cathodoluminescence (CL), major and trace element analyses and fluid inclusion studies on scheelite (W)-mineralized granodiorite porphyries from Dongyuan and Zhuxiling, southern Anhui Province (China). In Dongyuan, the larger part of the granodiorite porphyry body is mineralized with W concentrations up to 1140 g/t (total WO 3 reserves >140 000 tonnes), whereas in Zhuxiling mineralization is spatially more limited. All mineralized rocks are strongly altered, containing abundant calcite and no fresh plagioclase. W-mineralized rocks show higher K, Pb and lower Na, Sr, Ti contents compared to the non-mineralized ones. Co-variations between mobile elements (K, Na, Pb, Sr, Rb, etc.) and W, combined with petrological observations, demonstrate that fluid alteration must have controlled the mineralization. In quartz from both deposits 4 types of fluid inclusions have been recognized, i.e., aqueous-carbonic (WC-type), aqueous (W-type, subdivided into Wm-type containing minor detected CO 2 and Wn containing no CO 2 ), carbonic (pure CO 2 , C-type) and late secondary aqueous inclusions (LW-type). WC- and LW-type inclusions represent the original magmatic fluids and meteoric waters, respectively. The other inclusions represent evolved magmatic fluids which are closely related to alteration and mineralization. WC-, Wm- and Wn-type inclusions show higher salinity and lower homogenization temperatures, indicating fluid immiscibility with CO 2 effervescence. Additionally, during plagioclase alteration and precipitation of K-feldspar and sericite the K/Na ratio is lowered and Ca released. The precipitation of scheelite must have been promoted by increasing Ca contents in the fluid and also by increasing pH due to CO 2 loss. The present study demonstrates that for granitic rocks without calcareous wall rock, plagioclase breakdown must have been the key factor for scheelite mineralization. The presence of CO 2 -rich fluid indicates that both deposits formed in the same intracontinental extension setting as those in the Nanling region. Thus, the Yanshanian granites from southern Anhui Province may have a great potential for W mineralization, especially the blind ones in deep levels.
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  • Citations (4)
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References129
Newest
Published on Jul 1, 2016in Resource Geology1.11
Hui Wang1
Estimated H-index: 1
,
Chengyou Feng1
Estimated H-index: 1
+ 3 AuthorsJinliang Chen1
Estimated H-index: 1
A granite-related scheelite deposit has been recently discovered in the Wuyi metallogenic belt of southeast China. The veinlet–disseminated scheelite occurs mainly in the inner and outer contact zones of the porphyritic biotite granite, spatially associated with potassic feldspathization and silicification. Re–Os dating of molybdenite intergrowths with scheelite yield a well-constrained isochron age of 170.4 ± 1.2 Ma, coeval with the LA–MC–ICP–MS concordant zircon age of porphyritic biotite gran...
Published on Apr 1, 2016in Ore Geology Reviews3.39
Xiang Wang2
Estimated H-index: 2
(NU: Nanjing University),
Jie Chen2
Estimated H-index: 2
(NU: Nanjing University),
Minghua Ren2
Estimated H-index: 2
(UNLV: University of Nevada, Las Vegas)
Abstract The Nanling Range (Southeast China) is well known for its wolframite-bearing-quartz-vein (WQV) tungsten deposit. This study focuses on the geochemistry and geochronology of zircons from the WQV and challenges the current view of the tungsten mineralization in the Nanling Range. The features of the WQV zircons include: (1) pale brown, murky brown, or orange-red color and translucence under microscope; (2) {110} + {101} type crystal form; (3) weak cathodoluminescence; (4) enrichment of Hf...
Published on Sep 1, 2015in Gondwana Research6.48
Zhihao Mao4
Estimated H-index: 4
(China University of Geosciences),
Jiajun Liu18
Estimated H-index: 18
(China University of Geosciences)
+ 6 AuthorsXiaohong Luo3
Estimated H-index: 3
(NU: Northwestern University)
Abstract Porphyry and skarn deposits in the middle Yangtze Valley within the Northern Yangtze Craton have a combined tungsten resource of ~ 3 million tonnes (Mt) and represent one of the most important tungsten regions in the world. The Dahutang porphyry tungsten deposit, with reserves of > 1 Mt, is one of the largest deposits. Uranium–Pb analyses for the ore-related granitoids yield ages of 147.4 ± 0.58 Ma–148.3 ± 1.9 Ma for porphyritic biotite granite, 144.7 ± 0.47 Ma–146.1 ± 0.64 Ma for fine-...
Published on Jun 1, 2015in Precambrian Research3.83
Jinlong Yao10
Estimated H-index: 10
(NU: Nanjing University),
Liangshu Shu11
Estimated H-index: 11
(NU: Nanjing University)
+ 1 AuthorsJinyi Li13
Estimated H-index: 13
Abstract The Jiangnan orogenic belt in South China defines a subduction-collisional zone between the Yangtze and the Cathaysia blocks. The eastern part of this belt comprises the oceanic Huaiyu terrane, the northeast Jiangxi suture zone and the continental Jiuling terrane. We report zircon U–Pb and Hf isotope data and whole rock geochemistry on the arc magmatic rocks of andesite and basalt occurring as olistostromal blocks, as well as conglomerate in the Dengshan Group above the unconformity bet...
Published on Apr 1, 2015in Ore Geology Reviews3.39
Zhen-Ju Zhou6
Estimated H-index: 6
(CAS: Chinese Academy of Sciences),
Yan-Jing Chen38
Estimated H-index: 38
(CAS: Chinese Academy of Sciences)
+ 3 AuthorsHai-Xiang Zhao3
Estimated H-index: 3
(NU: Nanjing University)
Abstract The Qiangma gold deposit is hosted in the > 1.9 Ga Taihua Supergroup metamorphic rocks in the Xiaoqinling terrane, Qinling Orogen, on the southern margin of the North China Craton. The mineralization can be divided as follows: quartz-pyrite veins early, quartz-polymetallic sulfide veinlets middle, and carbonate-quartz veinlets late stages, with gold being mainly introduced in the middle stage. Three types of fluid inclusions were identified based on petrography and laser Raman spectrosc...
Published on Mar 1, 2015in Ore Geology Reviews3.39
Rongqing Zhang12
Estimated H-index: 12
(NU: Nanjing University),
Jianjun Lu13
Estimated H-index: 13
(NU: Nanjing University)
+ 8 AuthorsWenlan Zhang9
Estimated H-index: 9
(NU: Nanjing University)
Abstract The Nanling Range in South China hosts numerous W–Sn–rare metal deposits associated with several cycles of polygenetic granitic intrusions. In the Wangxianling area of the middle Nanling Range, igneous intrusions include the Wangxianling and Hehuaping granite plutons and more than 20 granite porphyry dykes. The Wangxianling pluton has a central phase of medium-grained tourmaline two-mica granite and a marginal phase of medium-grained tourmaline muscovite granite. The pluton hosts severa...
Published on Mar 1, 2015in Ore Geology Reviews3.39
Zhongliang Wang10
Estimated H-index: 10
(China University of Geosciences),
Liqiang Yang22
Estimated H-index: 22
(China University of Geosciences)
+ 8 AuthorsXiao-Li Zheng4
Estimated H-index: 4
Abstract The Xincheng gold deposit, located in west Jiaodong Peninsula in southeast North China Craton, is a representative mesothermal lode deposit hosted in Late Mesozoic granitoids in Jiaodong. Gold mineralization occurs as disseminated- and stockwork-style ores within the hydrothermal breccias and cataclastic zones controlled by the Jiaojia fault, whereas echelon tensile auriferous veins hosted in the NE- and NNE-trending subsidiary faults cutting the granitoids occur subordinately. Accordin...
Published on Mar 1, 2015in Ore Geology Reviews3.39
Yong-Fei Yang7
Estimated H-index: 7
(PKU: Peking University),
Yan-Jing Chen38
Estimated H-index: 38
(PKU: Peking University)
+ 1 AuthorsNuo Li21
Estimated H-index: 21
(PKU: Peking University)
Abstract The Donggou Mo deposit in the eastern Qinling area, China, is a giant porphyry system discovered based on a targeting concept by using the tectonic model for collisional orogeny, metallogeny and fluid flow (CMF model). Mo mineralization is associated with the Donggou aluminous A-type granite porphyry and was formed during the Early Cretaceous in a tectonic regime of continental extension. The orebodies mainly occur as numerous veinlets in the host-rocks. Hydrothermal ore-forming process...
Published on Mar 1, 2015in Ore Geology Reviews3.39
Pei Ni18
Estimated H-index: 18
(NU: Nanjing University),
XuDong Wang4
Estimated H-index: 4
(NU: Nanjing University)
+ 3 AuthorsTianGang Wang3
Estimated H-index: 3
(NU: Nanjing University)
Abstract Numerous wolframite–quartz vein type tungsten deposits are present in the Gannan metallogenic belt, South China, including the Piaotang and Dangping deposits in the Chong-You-Yu ore cluster, the Dajishan deposit in the Jiulianshan ore cluster, and the Pangushan deposit in the Yushan ore cluster. The ores generally consist of quartz and wolframite, with variable amounts of base metal sulfides. Wolframite and quartz are intergrown, but the genetic relationships between them are still ambi...
Published on Mar 1, 2015in Ore Geology Reviews3.39
Pei Ni18
Estimated H-index: 18
(NU: Nanjing University),
Guo-Guang Wang11
Estimated H-index: 11
(NU: Nanjing University)
+ 5 AuthorsYing-Feng Xu6
Estimated H-index: 6
(NU: Nanjing University)
Abstract The Shapinggou porphyry Mo deposit, one of the largest Mo deposits in Asia, is located in the Dabie Orogen, Central China. Hydrothermal alteration and mineralization at Shapinggou can be divided into four stages, i.e., stage 1 ore-barren quartz veins with intense silicification, followed by stage 2 quartz-molybdenite veins associated with potassic alteration, stage 3 quartz-polymetallic sulfide veins related to phyllic alteration, and stage 4 ore-barren quartz ± calcite ± pyrite veins w...
Cited By4
Newest
Published on May 1, 2019in Ore Geology Reviews3.39
Xiaoxia Duan12
Estimated H-index: 12
(Hefei University of Technology),
Xiao-xia Duan + 3 AuthorsZhen Zhang
Abstract In this study, we explore the chemistry of accessory apatite and zircon as tools to monitor the petrogenetic and metallogenetic processes involved in the formation of the Wushan Cu- and Zhuxiling W (Mo)-mineralization related granodiorite porphyry. The Wushan granitoids are metaluminous with A/CNK of 0.88−1.01, and the Zhuxiling intrusions are weakly peraluminous with higher A/CNK values (1.02−1.12). The Wushan granitoids have e Nd (t) values of -4.6∼-4.7, which, combined with the relat...
Published on Apr 1, 2019in Ore Geology Reviews3.39
Shenghua Wu1
Estimated H-index: 1
(CAS: Chinese Academy of Sciences),
Weidong Sun47
Estimated H-index: 47
(CAS: Chinese Academy of Sciences),
Xudong Wang2
Estimated H-index: 2
(NU: Northeastern University)
Abstract The Dongyuan deposit, in the recently identified world-class porphyry–skarn W metallogenic belt, east Jiangnan Orogen, China, is characterized by a set of nearly parallel and horizontal multi-cycle orebodies within cupolas of porphyritic granodiorite. Almost every orebody from the top to the bottom shows similar vertical changes in vein morphology and mineral assemblage from ≤1 cm quartz–feldspar–scheelite–calcite veins to 1–2 cm quartz–feldspar–muscovite–scheelite veins to 2–5 cm quart...
Published on Jan 1, 2019
Jean-Marc Baele9
Estimated H-index: 9
,
Sophie Decrée11
Estimated H-index: 11
+ 0 AuthorsBrian Rusk
Published on Jan 1, 2019in Mineralium Deposita3.40
Guiqing Xie3
Estimated H-index: 3
,
Jingwen Mao33
Estimated H-index: 33
+ 2 AuthorsZhiyuan Zhang3
Estimated H-index: 3
The Yangjiashan scheelite-bearing deposit (38,663 metric tons of WO3 with an average ore grade of 0.70% WO3) is hosted in quartz veins in a biotite monzogranite intrusion and surrounding slate in the Xiangzhong Metallogenic Province of southern China. The monzogranite has a zircon SHRIMP U–Pb age of 406.6 ± 2.8 Ma (2σ, n = 20, MSWD = 1.4). Cassiterite coexisting with scheelite yields a weighted mean 206Pb/238U age of 409.8 ± 5.9 Ma (2σ, n = 30, MSWD = 0.20), and molybdenite intergrown with schee...
Published on Aug 1, 2018in Ore Geology Reviews3.39
Xiao-Yu Li1
Estimated H-index: 1
(NU: Nanjing University),
Jian-Feng Gao27
Estimated H-index: 27
(CAS: Chinese Academy of Sciences)
+ 3 AuthorsJin-Wei Wu2
Estimated H-index: 2
(NU: Nanjing University)
Abstract The Late Triassic Muguayuan W deposit is located in the middle of the Jiangnan Orogen, South China. This deposit is characterized by veinlet-disseminated W mineralization that developed in the Sanxianba granitic porphyry stock. The ore minerals are mainly scheelite with minor molybdenite and wolframite. Scheelite mineralization was closely related to greisenization and phyllic alteration, and took place in two stages. Stage I involved scheelite ± wolframite ± molybdenite + quartz veinle...
View next paperEvolution of fluids in the Dasuji porphyry Mo deposit on the northern margin of the North China Craton: Constraints from Microthermometric and LA-ICP-MS analyses of fluid inclusions