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Zircon U-Pb geochronology and geochemistry of diorite dikes from Nancha ore deposit in Tonghua area of Jilin and its geological significance
WU Qiong, SUN Fengyue, WANG Li, LIU Jinlong, TIAN Lidan, WANG Fei
Global Geology ›› 2017, Vol. 20 ›› Issue (1) : 21-31.
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Zircon U-Pb geochronology and geochemistry of diorite dikes from Nancha ore deposit in Tonghua area of Jilin and its geological significance
The authors presented geochronology and geochemical data of diorites from Nancha gold deposit in Tonghua region, with the aim to constraining its formation age, magma source and tectonic setting. LA-ICP-MS U-Pb dating results of zircons from the diorites indicate that the rocks were formed in the Middle Jurassic (171±2 Ma, MSWD=1.19). Geochemically, these rocks have SiO2 concentrations of 52.52%-54.90%, K2O of 2.14%-3.84%, Na2O of 3.17%-3.35%, MgO of 7.43%-9.34% and high Mg# of 68.57-72.57. These rocks are characterized by enrichment in large ion lithophile elements(LILE, such as K, Ba, Rb and Sr)and light rare earth elements (LREE), relatively depletion in high field strength elements (HFSE, such as Ta, Nb, Ti and Zr), and heavy rare earth elements (HREE). These characteristics suggest that primary magma of the rocks were derived from the partial melting of mantle with miner crustal contamination, which may related to partial melting of mantle wedge by addition of sediment melt from subducting oceanic crust. Based on former and present studies, the authors consider that the Nancha ore deposit high-Mg diorites were formed in compressional structural setting which is similar to volcanic arc. It could be related to the subduction of the Paleo-Paci-fic plate beneath the Eurasian continent.
zircon U-Pb chronology / geochemistry / diorite / Nancha gold deposit / Tonghua / Jilin
Andersen T. 2002. Correction of common lead in U-Pb analyses that do not report 204Pb. Chemical Geology, 192:59-79.
Atherton M P, Petford N. 1993. Generation of sodium-rich magmas from newly underplated basaltic crust.Nature,362:477-489.
Boynton W V. 1984. Geochemistry of the rare earth elements:meterorite studies//Henderson P.(ed.). Rare Earth Elements Geochemistry. Amsterdam:Elseviver, 63-114.
Chai P, Sun J G, Hou Z Q, et al., 2016. Geological fluid inclusion H-O-S-Pb isotope, and Ar-Ar geochronology constraints on the genesis of the Nancha gold deposit, sou-thern Jilin Province, northeast China. Ore Geology Reviews,72:1053-1071.
Deng J F, Liu C, Feng Y F,et al. 2010. High magnesian andesitic/diorite rocks (HMA) and magnesian andesitic/dioritic rocks (MA):two igneous rock types related to oceanic subduction.Geology in China,37(4):1112-1118. (in Chinese with English abstract)
Deng J F, Mo X X, Luo Z H,et al. 1999. Igneous petrotectonic assemblage and crust-mantle metallogenic system.Earth Science Frontiers,6(2):259-270. (in Chinese with English abstract)
Feng S Z. 1997. Geological features and genesis of Nancha gold deposit in Jilin.Gold Geology,3(3):36-41. (in Chinese with English abstract)
Fu C L, Sun D Y, Zhang X Z,et al. 2010. Discovery and geo-logical significance of the Triassic high-Mg diorite in Hunchun area, Jilin Province.Acta Petrologica Sinica,26(4):1089-1102. (in Chinese with English abstract)
Han S J, Sun J G, Xing S W,et al. 2013. Genetic types, metallogenic epoch and geodynamic settings of endogenetic gold deposits in the continental margin, northeast China.Journal of Jilin University:Earth Science Edition,43(3):716-733. (in Chinese with English abstract)
Hart S R, Reid M R. 1991. Rb/Cs fractionation:A link between granulite metamorphism and the S-process.Geochi-met CosmochimActa,55:2379-2383.
Hua M, Zhang M S. 1997. The ore-controlling factors of tectonic alteration zone-type gold deposit in Proterozoic schist Formation of south Jilin-As an example of Nancha gold deposit inTonghua.Liaoning Geology,14(1):55-62. (in Chinese with English abstract)
Kamei A, Owada M, Nagao T,et al. 2004. High-Mg diorites derived from sanukitic HMA magmas, Kyushulsland, southwest Japan arc:evidence from clinopyroxene and whole rock compositions.Lithos,75(3):359-371.
Li C D, Zhang F Q, Miao L C,et al. 2007. Zircon SHRIMP geochronology and geochemistry of Late Permian high-Mg andesites in Seluohe area, Jilin Province, China.Acta Petrologica Sinica,23(4):767-776. (in Chinese with English abstract)
Li C M. 2009. A review on the minerageny and situ microanalytical dating techniques of zircons. GeologicalSurvey and Research,32(3):161-174. (in Chinese with English abstract)
Li H W, Li C M. 2009. Geological characteristics and genetic analysis of Nancha gold deposit.Jilin Geology,28(3):15-17. (in Chinese with English abstract)
Lin Q, Ge W C, Sun D Y,et al. 1999. Geomechanical signi-ficance of the Mesozoic volcanics in Northeast Asia.Chinese Journal of Geophysics,42(Suppl.):75-84. (in Chinese with English abstract)
Liu Y S, Hu Z C, Gao S,et al. 2008. In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard.Chemical Geo-logy,257(1/2):34-43.
Liu Y S, Gao S, Hu Z C,et al. 2010. Continental and ocea-nic crust recycling-induced melt-oeriotite interactions in the Trans-North China Orogen:U-Pb dating, Hf isotopes and trace elements in zircons from mantle xenoliths.Journal of Petrology,51(1/2):537-571.
Liu Z J,Wang X Y, Tang P F. 2009. Geological features and genesis of Fuxingcun gold deposit in southern Jilin.Gold Science and Technology,17(3):6-11. (in Chinese with English abstract)
Ludwig K R. 2003. Isoplot ageochronological toolkit for Microsoft Execl. Berkeley:Geochronology Center Special Publication, 74.
Pearce J A. 1982. Trace element characteristics of lavas from destructive plate boundaries//Thorpe R S. (ed.) Ande-site:Orogenic andesites and related rocks. New York:John Wiley & Sons, 525-548.
Pei F P, Xu W L, Yang D B,et al. 2008. Mesozoic volcanic rocks in the southern Songliao Basin:zircon U-Pb ages and their constraints on the nature of basin basement.Earth Science-Journal of China University of Geosciences,33(5):603-617. (in Chinese with English abstract)
Peng Y J, Chen Y J. 2007. Location of structural boundary between Ji-Hei orogenic zone and Kaiyuan-Shanchen Town section of North China Platform.Global Geology,26(1):1-6. (in Chinese with English abstract)
Smith E I, Sanchez A, Walker J D,et al. 1999. Geochemistry of mafic magmas in the hurricane volcanic field, Utah:implications for small-and-large-scale chemical variability of the lithosphere mantle.Journal of Geology,107:433-448.
Sun S S, McDonough W F. 1989. Chemical and isotopic systematics of oceanic basalts:implication for mantle composition and processes//Saunder A D,Norry M J (eds.) Magmatism in the ocean basins (volume 42). London:Geological Society London Special Publication, 313-345.
Tang J, Xu W L, Wang F,et al. 2011. Petrogenesis of bimodal volcanic rocks from Maoershan Formation in Zhangguangcai Range:evidence from geochronology and geochemistry.Global Geology,30(4):508-520. (in Chinese with English abstract)
Tatsumi Y. 1982. Origin of high-magnesian andesites in the Setouehi volcanic belt, Southwest Japan, Ⅱ. Melting phase relations at high pressures. Earth and Planet Science Letters,60(2):305-317.
Tatsumi Y. 2001. Geochemical modeling of partial melting of subducting sediments and subsequent melt-mantle interaction:generation of high-Mg andesites in the Setouchi volcanic belt.Southwest Japan Geology,29(4):323-326.
Taylor S R, Mclennan S M. 1995. The geochemical evolution of the continental crust.Reviews of Geophysics,33(2):241-265.
Wang L. 2010. The analysis of genesis of Nancha gold deposit in Jilin Province. Public Communication of Science & Technology,29(6):60, 49. (in Chinese)
Wei H Y, Sun D Y, Ye S Q,et al. 2012. Zircon U-Pb ages and its geological significance of the granitic rocks in the Yichun-Hengang Regang region, southeastern Xiao Hinggan Mountains. Earth Science-Journal of China University of Geosciences,37(Suppl.):50-59. (in Chinese with English abstract)
Wen S, Li B L, Li L B,et al. 2013. Zircon U-Pb age geochemistry of Nanquanyan diorite in Lanjia gold deposit, Jilin Province. Earth Science-Journal of China University of Geosciences,38(2):505-315. (in Chinese with English abstract)
Wu F Y, Yang J H, Wilde S A,et al. 2007. Detrital zircon U-Pb and Hf isotopic constraints on the crustal evolution of North Korea.Precambrian Research.157:155-177.
Wu F Y, Yang J H, Lou C H,et al. 2007a. The Heilongjiang Group:a Jurassic accretionary complex in the Jiamusi Massif at the western Pacific margin of Northeastern China.Island Arc,16(1):156-172.
Wu F Y, Zhao G C, Sun D Y,et al. 2007b. The Hulan Group:its role in the evolution of the Central Asian orogenic belt of NE China.Journal of Asian Earth Sciences,30:542-556.
Wu F Y, Sun D Y, Ge W C,et al. 2011. Geochronology of the phanerozoic granitoids in northeastern China.Journal of Asian Earth Sciences,41(1):1-30.
Xu M J, Xu W L, Wang F,et al. 2013. Geochronology and geochemistry of the Early Jurassic granitoids in the Central Lesser Xing'an Range, NE China and its tectonic implications.Acta Petrologica Sinica, 29(2):354-368. (in Chinese with English abstract)
Xu W L, Pei F P, Gao F H,et al. 2008. Zircon U-Pb age from basement granites in Yishu graben and its tectonic implications. Earth Scienc:Journal of China University of Geosciences,33(2):145-150.
Xu W L, Ji W Q, Pei F P,et al. 2009. Triassic volcanism in eastern Heilongjiang and Jilin provinces, NE China:chronology, geochemistry, and tectonic implications. Journal of Asian Earth Sciences,34(3):392-402. (in Chinese with English abstract)
Yang X M, Yang X Y, Chen S X. 2000. Petrogeochemistry. Hefei:University of Science and Technology of China Press, 1-275.
Zhao Y M, Wang K Y, Cao X L, et al. 1993. A study on the geologic features and geochemistry of the Huanggoushan-Nancha gold deposits, southern Jilin Province. Jilin Geo-logy,12(2):57-65. (in Chinese with English abstract)
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