Zircon U-Pb geochronology and Hf isotopic constraints on petrogenesis of Carnian Huanglonggou granodiorites inWulonggou area of Eastern Kunlun Orogen, NW China

doi:10.3969/j.issn.1673-9736.2018.02.02

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世界地质(英文版) ›› 2018, Vol. 21 ›› Issue (2) : 91-107. DOI: 10.3969/j.issn.1673-9736.2018.02.02

论文

Zircon U-Pb geochronology and Hf isotopic constraints on petrogenesis of Carnian Huanglonggou granodiorites inWulonggou area of Eastern Kunlun Orogen, NW China

SONG Kai, DING Qingfeng, ZHANG Qiang

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Zircon U-Pb geochronology and Hf isotopic constraints on petrogenesis of Carnian Huanglonggou granodiorites inWulonggou area of Eastern Kunlun Orogen, NW China

SONG Kai, DING Qingfeng, ZHANG Qiang

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摘要

The Wulonggou area located in the Eastern Kunlun Orogen in NW China is characterized by extensive granitoid magmatism,ductile faulting and orogenic gold mineralization.The Huanglonggou granodiorite is cut by an orogenic gold-bearing fault.This study investigated the major and trace-element compositions,zircon U-Pb dates and zircon Hf isotopic compositions of the Huanglonggou granodiorite.One Huanglonggou granodiorite sample yielded a weighted mean U-Pb zircon age of ~221 Ma (Carnian).The Carnian granodiorite is metaluminous,with high alkalis contents of 6.37%-8.86%,high Al₂O₃ contents of 15.41%-16.19%,high Sr contents of (426-475)×10^-6,relatively high Sr/Y ratios,high (La/Yb)_Nvalues and low HREE,suggesting an adakite type high-SiO₂ granite.The Huanglonggou granodiorite sample has zircon ε_Hf(t) values ranging from-4.4 to+1.1.These Hf isotopic data suggest that the Carnian granodiorite was likely derived from the partial melting of subducted Paleo-Tethys oceanic slab.It is suggested that the Late Triassic granodiorite was emplaced during the northward subduction of Paleo-Tethys oceanic slab.Orogenic gold mineralization in the Wulonggou area formed after the emplacement of the Late Triassic intrusive rocks.

Abstract

导出引用

SONG Kai, DING Qingfeng, ZHANG Qiang. Zircon U-Pb geochronology and Hf isotopic constraints on petrogenesis of Carnian Huanglonggou granodiorites inWulonggou area of Eastern Kunlun Orogen, NW China[J]. 世界地质(英文版). 2018, 21(2): 91-107 https://doi.org/10.3969/j.issn.1673-9736.2018.02.02

SONG Kai, DING Qingfeng, ZHANG Qiang. Zircon U-Pb geochronology and Hf isotopic constraints on petrogenesis of Carnian Huanglonggou granodiorites inWulonggou area of Eastern Kunlun Orogen, NW China[J]. Global Geology. 2018, 21(2): 91-107 https://doi.org/10.3969/j.issn.1673-9736.2018.02.02

参考文献

Andersen T. 2002. Correction of common lead in U-Pb analyses that do not report ²⁰⁴Pb.Chemical Geology,192(1/2):59-79.
Batchelor R A, Bowden P. 1985. Petrogenetic interpretation of granitoid rock series using multicationic parameters.Chemical Geology,48(1):43-55.
Belousova E A, Griffin W L, O'Reilly S Y,et al. 2002. Igneous zircon, trace element composition as an indicator of source rock type.Contribution to Mineralogy and Petrology,143(5):602-622.
Bian Q T, Zhao D S, Ye Z R,et al. 2002. A preliminary study of the Kunlun-Qilian-Qinling suture system:Acta Geoscientia Sinica,23:501-508. (in Chinese with English abstract)
Bouvier A, Vervoort J D, Patchett P J. 2008. The Lu-Hf and Sm-Nd isotopic composition of CHUR:Constraints from unequilibrated chondrites and implications for the bulk composition of terrestrial planets. Earth and Planetary Science Letters,273(1/2):48-57.
Boynton W V. 1984. Geochemistry of the rare earth elements:meteorites studies//Henderson P. (ed.) Rare earth element geochemistry. New York:Elservier, 63-114.
Castillo P R. 2012. Adakite petrogenesis.Lithos,134:304-316.
Chappell B W. 1999. Aluminium saturation in I-and S-type granites and the characterization of fractionated haplogranites.Lithos,46(3):535-551.
Chen N S, Sun M, Wang Q Y,et al. 2007. EMP chemical ages of monazites from central zone of the eastern Kunlun Orogen, records of multi-tectonometamorphic events.Chinese Science Bulletin,52(16):2252-2263.
Defant M J, Drummond M S. 1990. Derivation of some modern arc magmas by melting of young subduction lithosphere.Nature,347:662-665.
Deng W M. 1998. Cenozoic intraplate volcanic rocks in the northern Qinghai-Xizang Plateau. Beijing:Geological Publishing House, 180. (in Chinese with English abstract)
Ding Q F, Jiang S Y. Sun F Y. 2014. Zircon U-Pb geochronology, geochemical and Sr-Nd-Hf isotopic compositions of the Triassic granite and diorite dikes from the Wulonggou mining area in the Eastern Kunlun Orogen, NW China. Petrogenesis and tectonic implications.Lithos,205:266-283.
Ding Q F, Liu F, Yan W. 2015. Zircon U-Pb geochronology and Hf isotopic constraints on the petrogenesis of Early Triassic granites in the Wulonggou area of the Eastern Kunlun Orogen, Northwest China.International Geology Review,57(13):1-20.
FIQGS (First Institute of Qinghai Geology Survey). 2010. Exploration report for Hongqigou-Shenshuitan gold deposits in Wulonggou area in Dulan County in Qinghai province. Xining:First Institute of Qinghai Geology Survey Report, 161. (in Chinese)
Gou J, Sun D, Ren Y,et al. 2013. Petrogenesis and geodynamic setting of Neoproterozoic and Late Paleozoic magmatism in the Manzhouli-Erguna area of Inner Mongolia, China:Geochronological, geochemical and Hf isotopic evidence.Journal of Asian Earth Sciences,68:114-137.
Griffin W L, Pearson N J, Belousova E,et al. 2000. The Hf isotope composition of cratonic mantle, LAM-MC-ICP-MS analysis of zircon megacrysts in kimberlites.Geochimica et Cosmochimica Acta,64(1):133-147
Griffin W L, Wang X, Jackson S E,et al. 2002. Zircon chemistry and magma mixing, SE China, in-situ analysis of Hf isotopes, Tonglu and Pingtan igneous complexes:Lithos,61(3):237-269.
Hoskin P W O, Black L P. 2000. Metamorphic zircon formation by solid-state recrystallization of protolith igneous zircon.Journal of Metamorphic Geology,18(4):423-439.
Hou K J, Li Y H, Zou T R,et al. 2007. Laser ablation-MC-ICP-MS technique for Hf isotope microanalysis of zircon and its geological applications.Acta Petrologica Sinica,23(10):2595-2604.
Jiang C F, Yang J S, Feng B G,et al. 1992. Opening closing tectonics of Kunlun Shan. Beijing:Geological Publishing House, Geological Memoirs,5:217. (in Chinese with English abstract)
Jiang Y H, Jiang S Y, Dai B Z,et al. 2009. Middle to Late Jurassic felsic and mafic magmatism in southern Hunan Province, Southeast China:implications for a continental arc to rifting.Lithos,107(3/4):185-204.
Jiang Y H, Jin G D, Liao S Y,et al. 2010. Geochemical and Sr-Nd-Hf isotopic constraints on the origin of Late Triassic granitoids from the Qinling orogen, central China, Implications for a continental arc to continent-continent collision:Lithos,117(1/2/3/4):183-197.
Jiang Y H, Liu Z, Jia R Y,et al. 2012, Miocene potassic granite-syenite association in western Tibetan Plateau:Implications for shoshonitic and high Ba-Sr granite genesis.Lithos,134:146-162.
Liu Y J, Genser J, Neubauer F,et al. 2005, ⁴⁰Ar/³⁹Ar mineral ages from basement rocks in the Eastern Kunlun Mountains, NW China, and their tectonic implications.Tectonophysics,398(1/2/3/4):199-224.
Liu Y S, Gao S, Hu Z C,et al. 2010b. Continental and oceanic crust recycling-induced melt-peridotite interactions in the Trans-North China Orogen:U-Pb dating, Hf isotopes and trace elements in zircons of mantle xenoliths.Journal of Petrology,51(1/2):537-571.
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 Geology,257(1/2):34-43.
Liu Y S, Hu Z C, Zong K Q,et al. 2010c. Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS.Chinese Science Bulletin,55(15):1535-1546.
Lu L, Zhang Y L, Wu Z H,et al. 2013. Zircon U-Pb dating of Early Paleozoic granites from the East Kunlun Mountains and its geological significance.Acta Geoscientica Sinica,34(4):447-454. (in Chinese with English abstract)
Lu L. 2011. Study on the ore-controlling structure of Wulonggou gold deposit in East Kunlun Mountain; master's degree thesis. Beijing:Chinese Academy of Geological Sciences. (in Chinese with English abstract)
Ludwig K R. 2003. ISOPLOT 3.00, a geochronology toolkit for Microsoft Excel. Berkeley:Berkeley Geochronological Center Special Publication.
Maniar P D, Piccoli P M. 1989. Tectonic discrimination of granitoids.Geological Society of America Bulletin,101(5):635-643.
Martin H, Smithies R H, Rapp R,et al. 2005. An overview of adakite, tonalite-trondhjemite-granodiorite (TTG), and sanukitoid, relationships and some implications for crustal evolution:Lithos,79(1/2):1-24.
McDonough W F, Sun S S. 1995. The composition of the earth.Chemical Geology,120(3/4):223-253.
Middlemost E A K. 1994. Naming materials in the magma/igneous rock system.Earth Science Reviews,37(3/4):215-224.
Morrison G W. 1980. Characteristics and tectonic setting of the shoshonite rock association.Lithos,13(1):97-108.
Pearce J A, Harris N B W, Tindle A G. 1984. Trace element discrimination diagrams for the tectonic interpretation of granitoid rocks. Journal of Petrology,25(4):956-983.
Rapp R P, Watson E B, Miller C F. 1991. Partial melting of amphibolite/eclogite and the origin of Archaean trondhjemites and tonalites.Precambrian Research,51(1/2/3/4):1-25.
Rickwood P C. 1989. Boundary lines within petrologic diagrams which use oxides of major and minor elements.Lithos,22(4):247-263.
Rollison H. 1993. Using geochemical data:Evaluation, presentation, interpretation. London:Longman Scientific and Technical, 352.
Sisson T W, Ratajeski K, Hankins W B,et al. 2005. Voluminous granitoid magmas from common basaltic sources.Contributions to Mineralogy and Petrology,148(6):635-661.
Watson E. B, Harrison T M. 1983. Zircon saturation revisited:temperature and composition effects in a variety of crustal magma types.Earth and Planetary Science Letters,64(2):295-304.
Wu C Z, Liu S H, Gu L X,et al. 2011, Formation mechanism of the lanthanide tetrad effect for a topaz-and amazonite-bearing leucogranite pluton in eastern Xinjiang, NW China.Journal of Asian Earth Sciences,42(5SI):903-916.
Wu F Y, Yang Y H, Xie L W. 2006. Hf isotopic compositions of the standard zircons and baddeleyites used in U-Pb geochronology.Chemical Geology,234(1/2):105-126.
Yang J S, Robinson P T, Jiang C F,et al. 1996. Ophiolites of the Kunlun Mountains, China and their tectonic implication.Tectonophysics,258(1/2/3/4):215-231.
Yang J S, Wu C L, Shi R D,et al. 2002. Miocene and Pleistocene shoshonitic volcanic rocks in the Jingyuhu area, north of the Qinghai-Tibet Plateau.Acta Petrologica Sinica,18(2):161-176.
Yang S Y, Jiang S Y, Jiang Y H,et al. 2011. Geochemical, zircon U-Pb dating and Sr-Nd-Hf isotopic constraints on the age and petrogenesis of an Early Cretaceous volcanic-intrusive complex at Xiangshan, Southeast China.Mineralogy and Petrology,101(1/2):21-48.
Yin H F, Zhang K X. 1997. Characteristics of the eastern Kunlun orogenic Belt.Earth Science-Journal of China University of Geosciences,22(4):339-342. (in Chinese with English abstract)
Yuan C, Sun M, Xiao W J,et al. 2009, Garnet-bearing tonalitic porphyry from East Kunlun, Northeast Tibetan Plateau, implications for adakite and magmas from the MASH ZoneInternational Journal of Earth Sciences,98(6):1489-1510.
Zhang J Y, Ma C Q, Li J W,et al. 2017. A possible genetic relationship between orogenic gold mineralization and post-collisional magmatism in the eastern Kunlun Orogen, western China.Ore Geology Reviews,81:342-357.