Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-23T16:15:51.190Z Has data issue: false hasContentIssue false
  • English
  • Français

Late Triassic porphyries in the Zhongdian arc, eastern Tibet: origin and implications for Cu mineralization

Published online by Cambridge University Press:  02 September 2019

Pengsheng Dong Open the ORCID record for Pengsheng Dong [Opens in a new window] ,
Guochen Dong ,
Zhuanrong Sun ,
Huawei Li ,
Jiahui Tang  and
Hongyun Zhu
Pengsheng Dong
Affiliation:
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
Guochen Dong*
Affiliation:
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
Zhuanrong Sun
Affiliation:
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
Huawei Li
Affiliation:
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
Jiahui Tang
Affiliation:
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
Hongyun Zhu
Affiliation:
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
*
Author for correspondence: Guochen Dong, Email: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Whole-rock and Sr–Nd–Pb isotopic composition data, zircon Hf isotopic data and zircon U–Pb ages were obtained for the Late Triassic porphyries in the Zhongdian arc, eastern Tibet. These porphyries are intermediate and metaluminous and are enriched in large ion lithophile elements and depleted in high field strength elements. Moreover, they have weak negative Eu anomalies, high Sr and Ba contents, and high Sr/Y ratios. Different mineral geothermobarometers suggest that the porphyries in the Zhongdian arc crystallized at c. 640–829 °C and pressures of 2.1–2.8 kbar at depths shallower than 8 km. The porphyries have a calculated water content of 4.47–4.94 wt % and a relatively high magmatic oxygen fugacity. These porphyries were emplaced mainly at 230–203 Ma with a peak at 218–215 Ma. The Sr–Nd–Pb–Hf isotope data suggest that the porphyries in the Zhongdian arc were derived from a mixed melt of 50–65 % asthenospheric mantle and 35–50 % eclogite from the western Yangtze lower crust that experienced low-degree partial melting of 2–10 %. Subsequent fractional crystallization resulted in the decreasing trends of the major- and trace-element contents. The high Sr/Y and La/Yb values are the result of the low degree of partial melting of the western Yangtze lower crust rather than fractional crystallization, because no linear relationship was noted between Sr/Y or La/Yb and SiO2. The mixed melts from the lower crust and asthenospheric mantle provided a fertile magma source, and subsequent fractional crystallization under the favourable magmatic conditions of high water content and high oxidation state resulted in the formation of the porphyry Cu–Au deposits.

Keywords

high Sr/YSr–Nd–Pb–Hf isotopesporphyry Cu mineralizationZhongdian arceastern Tibet
Type
Original Article
Information
Geological Magazine , Volume 157 , Issue 2 , February 2020 , pp. 275 - 288
Copyright
© Cambridge University Press 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Cao, K, Xu, JF, Chen, JL, Huang, XX, Ren, JB, Zhao, XD and Liu, ZX (2016) Double-layer structure of the crust beneath the Zhongdian arc, SW China: U–Pb geochronology and Hf isotope evidence. Journal of Asian Earth Sciences 115, 455–67.CrossRefGoogle Scholar
Cao, K, Yang, ZM, Xu, JF, Fu, B, Li, WK and Sun, MY (2018) Origin of dioritic magma and its contribution to porphyry Cu–Au mineralization at Pulang in the Yidun terrane, eastern Tibet. Lithos 304–307, 436–49.CrossRefGoogle Scholar
Castillo, PR, Janney, PE and Solidum, RU (1999) Petrology and geochemistry of Camiguin Island, southern Philippines: insights to the source of adakites and other lavas in a complex arc setting. Contributions to Mineralogy and Petrology 134, 33–51.CrossRefGoogle Scholar
Chang, CF (1997) Geology and Tectonics of Qinghai–Xizang Plateau. Beijing: Science Press.Google Scholar
Chen, YL, Luo, ZH and Liu, C (2001) New recognition of Kangding–Mianning metamorphic complexes from Sichuan, western Yangtze craton: evidence from Nd isotopic composition. Earth Science Journal of China University of Geosciences 26, 279–85 (in Chinese with English Abstract).Google Scholar
Chen, BW, Wang, KY, Liu, WJ, Cai, ZJ, Zhang, QW, Peng, XJ, Qiu, YZ and Zheng, YZ (1987) Geotectonics of the Nujiang–Lancangjiang–Jinshajiang Region. Beijing: Geological Publishing House (in Chinese).Google Scholar
Chen, JL, Xu, JF, Ren, JB, and Huang, XX (2017) Late Triassic E-MORB-like basalts associated with porphyry Cu-deposits in the southern Yidun continental arc, eastern Tibet: evidence of slab-tear during subduction? Ore Geology Reviews 90, 1054–62.CrossRefGoogle Scholar
Chen, JL, Xu, JF, Ren, JB, Huang, XX and Wang, BD (2014) Geochronology and geochemical characteristics of Late Triassic porphyritic rocks from the Zhongdian arc, eastern Tibet, and their tectonic and metallogenic implications. Gondwana Research 26, 492–504.CrossRefGoogle Scholar
Defant, MJ and Drummond, MS (1990) Derivation of some modern arc magmas by melting of young subducted lithosphere. Nature 347, 662–5.CrossRefGoogle Scholar
Fan, WM, Wang, YJ, Zhang, AM, Zhang, FF and Zhang, YZ (2010) Permian arc–back-arc basin development along the Ailaoshan tectonic zone: geochemical, isotopic and geochronological evidence from the Mojiang volcanic rocks, Southwest China. Lithos 119, 553–68.CrossRefGoogle Scholar
Foley, SF and Wheller, GE (1990) Parallels in the origin of the geochemical signatures of island arc volcanics and continental potassic igneous rocks: the role of residual titanates. Chemical Geology 85, 1–18.CrossRefGoogle Scholar
Gao, Y, Santosh, M, Hou, Z, Wei, R, Ma, G, Chen, Z and Wu, J (2012) High Sr/Y magmas generated through crystal fractionation: evidence from Mesozoic volcanic rocks in the northern Taihang orogen, North China Craton. Gondwana Research 22, 152–68.CrossRefGoogle Scholar
Gao, X, Yang, LQ, Meng, JY and Zhang, LJ (2017) Zircon U–Pb, molybdenite Re–Os geochronology and Sr–Nd–Pb–Hf–O–S isotopic constraints on the genesis of Relin Cu–Mo deposit in Zhongdian, Northwest Yunnan, China. Ore Geology Reviews 91, 945–62.CrossRefGoogle Scholar
Geng, JZ, Li, HK, Zhang, J, Zhou, HY and Li, HM (2011) Zircon Hf isotope analysis by means of LA–MC–ICPMS. Geological Bulletin of China 30, 1508–13 (in Chinese with English abstract).Google Scholar
Gill, JB (1981) Orogenic Andesites and Plate Tectonics. New York: Springer.CrossRefGoogle Scholar
Hart, SR (1984) A large-scale isotope anomaly in the Southern Hemisphere mantle. Nature 309, 753–7.CrossRefGoogle Scholar
He, DF, Zhu, WG, Zhong, H, Ren, T, Bai, ZJ and Fen, HP (2013) Zircon U–Pb geochronology and elemental and Sr–Nd–Hf isotopic geochemistry of the Daocheng granitic pluton from the Yidun terrane, SW China. Journal of Asian Earth Sciences 67–68, 1–17.Google Scholar
Hou, ZQ (1993) Tectono-magmatic evolution of the Yidun island-arc and geodynamic setting of Kuroko-type sulfide deposits in Sanjiang region, SW China. Resource Geology Special Issue 17, 336–50.Google Scholar
Hou, ZQ, Wang, LQ, Zaw, K, Mo, XX, Wang, MJ, Li, DM and Pan, GT (2003) Postcollisional crustal extension setting and VHMS mineralization in the Jinshajiang orogenic belt, southwestern China. Ore Geology Reviews 22, 177–99.Google Scholar
Hou, Z, Zaw, K, Pan, G, Mo, X, Xu, Q, Hu, Y and Li, X (2007) Sanjiang Tethyan metallogenesis in S.W. China: tectonic setting, metallogenic epochs and deposit types. Ore Geology Reviews 31, 48–87.CrossRefGoogle Scholar
Jin, CH, Fan, WY, Zhang, Y, Zhang, H, Shen, ZW and Gao, JH (2013) Trace element composition and U–Pb chronology of zircons in monzonite porphyry from the Langdu copper deposit in Zhongdian and their geological significance. Geotectonica et Metallogenia 37, 267–72 (in Chinese with English abstract).Google Scholar
Kinny, PD and Mass, R (2003) Lu–Hf and Sm–Nd isotope systems in zircon. Reviews in Mineralogy and Geochemistry 53, 327–41.CrossRefGoogle Scholar
Kong, H, Xi, XS, Jin, ZM and Deng, DW (2003) Preliminary study of Sm–Nd isotopic geochronology from manning complex in Kangdian area. Journal of Mineralogy and Petrology 23, 85–90 (in Chinese with English abstract).Google Scholar
Kong, DX, Xu, JF and Chen, JL (2016) Oxygen isotope and trace element geochemistry of zircons from porphyry copper system: implications for Late Triassic metallogenesis within the Yidun Terrane, southeastern Tibetan Plateau. Chemical Geology 441, 148–61.CrossRefGoogle Scholar
Lai, AQ, Li, WC, Liu, XL, Yang, FC and Li, Z (2016) Zircon U–Pb dating, geochemical characteristics of Songnuo quartz monzonite porphyries in the Geza arc, Yunnan province, and their geological significance. Geological Review 62, 955–69 (in Chinese with English abstract).Google Scholar
LaTourrette, T, Hervig, RL and Holloway, JR (1995) Trace element partitioning between amphibole, phlogopite, and basanite melt. Earth and Planetary Science Letters 135, 13–30.CrossRefGoogle Scholar
Leng, CB, Zhang, XC, Hu, RZ, Wang, SX, Zhong, H, Wang, WQ and Bi, XW (2012) Zircon U–Pb and molybdenite Re–Os geochronology and Sr–Nd–Pb–Hf isotopic constraints on the genesis of the Xuejiping porphyry copper deposit in Zhongdian, Northwest Yunnan, China. Journal of Asian Earth Sciences 60, 31–48.CrossRefGoogle Scholar
Li, WC, Zeng, PS, Hou, ZQ and White, NC (2011) The Pulang porphyry copper deposit and associated felsic intrusions in Yunnan Province, southwest China. Economic Geology 106, 79–92.Google Scholar
Ling, WL, Duan, RC, Xie, XJ, Zhang, YQ, Zhang, JB, Cheng, JP, Liu, XM and Yang, HM (2009) Contrasting geochemistry of the Cretaceous volcanic suites in Shandong province and its implications for the Mesozoic lower crust delamination in the eastern North China craton. Lithos 113, 640–58.CrossRefGoogle Scholar
Liu, YS, Hu, ZC, Gao, S, Gunther, D, Xu, J, Gao, CG and Chen, HH (2008) In situ analysis of major and trace elements anhydrous minerals by LA–ICP–MS without applying an internal standard. Chemical Geology 257, 34–43.CrossRefGoogle Scholar
Liu, XL, Li, WC and Zhang, N (2016) Zircon U–Pb age and geochemical characteristics of the quartz monzonite porphyry from the Zhuoma deposit, Yunnan, China. Bulletin of Mineralogy, Petrology and Geochemistry 35, 109–17 (in Chinese with English abstract).Google Scholar
Lu, YJ, Loucks, RR, Fiorentini, ML, Yang, ZM and Hou, ZQ (2015) Fluid flux melting generated postcollisional high Sr/Y copper ore-forming water-rich magmas in Tibet. Geology 43, 583–6.CrossRefGoogle Scholar
Ma, Q, Zheng, JP, Xu, YG, Griffin, WL and Zhang, RS (2015) Are continental “adakites” derived from thickened or foundered lower crust? Earth and Planetary Science Letters 419, 125–33.CrossRefGoogle Scholar
Maniar, PD and Piccoli, PM (1989) Tectonic discrimination of granitoids. Geological Society of America Bulletin 101, 635–43.2.3.CO;2>CrossRefGoogle Scholar
Martin, H, Smithies, RH, Rapp, R, Moyen, JF and Champion, D (2005) An overview of adakite, tonalite–trondhjemite–granodiorite (TTG), and sanukitoid: relationships and some implications for crustal evolution. Lithos 79, 1–24.CrossRefGoogle Scholar
Middlemost, EAK (1994) Naming materials in the magma/igneous rock system. Earth Science Reviews 37, 215–24.CrossRefGoogle Scholar
Moore, GM and Carmichael, ISE (1998) The hydrous phase equilibria (to 3 kbar) of an andesite and basaltic andesite from western Mexico: constraints on water content and conditions of phenocryst growth. Contributions to Mineralogy and Petrology 130, 304–19.CrossRefGoogle Scholar
Mutch, EJF, Blundy, JD, Tattitch, BC, Cooper, FJ and Brooker, RA (2016) An experimental study of amphibole stability in low-pressure granitic magmas and a revised Al-in-hornblende geobarometer. Contributions to Mineralogy and Petrology 171, 85. doi: 10.1007/s00410-016-1298-9.CrossRefGoogle Scholar
Pullen, A, Kapp, P, Gehrels, GE, Vervoort, JD and Ding, L (2008) Triassic continental subduction in central Tibet and Mediterranean-style closure of the Paleo-Tethys Ocean. Geology 36, 351–4.CrossRefGoogle Scholar
Qian, Q and Hermann, J (2013) Partial melting of lower crust at 10–15 kbar: constraints on adakite and TTG formation. Contributions to Mineralogy and Petrology 165, 1195–24.CrossRefGoogle Scholar
Rapp, RP (1995) Dehydration melting of metabasalt at 8–32 kbar: implications for continental growth and crust-mantle recycling. Journal of Petrology 36, 891–931.CrossRefGoogle Scholar
Reid, AJ, Wilson, CJL and Liu, S (2005) Structural evidence for the Permo-Triassic tectonic evolution of the Yidun Arc, eastern Tibetan Plateau. Journal of Structural Geology 27, 119–37.CrossRefGoogle Scholar
Reid, A, Wilson, CJL, Shun, L, Pearson, N and Belousova, E (2007) Mesozoic plutons of the Yidun Arc, SW China: U/Pb geochronology and Hf isotopic signature. Ore Geology Reviews 31, 88–106.CrossRefGoogle Scholar
Ren, JB, Xu, JF and Chen, JL (2011) Zircon geochronology and geological implications of ore-bearing porphyries from Zhongdian arc. Acta Petrologica Sinica 27, 2591–9 (in Chinese with English abstract).Google Scholar
Richards, JP (2011) High Sr/Y arc magmas and porphyry Cu±Mo±Au deposits: just add water. Economic Geology 106, 1075–81.CrossRefGoogle Scholar
Richards, JP and Kerrich, R (2007) Special paper: adakite-like rocks: their diverse origins and questionable role in metallogenesis. Economic Geology 102, 537–76.CrossRefGoogle Scholar
Ridolfi, F, Renzulli, A and Puerini, M (2010) Stability and chemical equilibrium of amphibole in calc–alkaline magmas: an overview, new thermobarometric formulations and application to subduction–related volcanoes. Contributions to Mineralogy and Petrology 160, 45–66.CrossRefGoogle Scholar
Roger, F, Jolivet, M and Malavieille, J (2010) The tectonic evolution of the SongpanGarzê (North Tibet) and adjacent areas from Proterozoic to Present: a synthesis. Journal of Asian Earth Sciences 39, 254–69.CrossRefGoogle Scholar
Sisson, TW, Ratajeski, K, Hankins, WB and Glazner, AF (2005) Voluminous granitic magmas from common basaltic sources. Contributions to Mineralogy and Petrology 148, 635–61.CrossRefGoogle Scholar
Sun, WD, Huang, RF, Li, H, Hua, YB, Zhang, CC, Sun, SJ, Zhang, LP, Ding, X, Li, CY, Zartmana, RE and Ling, MX (2015) Porphyry deposits and oxidized magmas. Ore Geology Reviews 65, 97–131.CrossRefGoogle Scholar
Sun, SS and McDonough, WF (1989) Chemical and isotopic systematics of oceanic basalts: implication for mantle compositions and processes. In Magmatism in the Ocean Basins (eds Saunders, AD and Norry, MJ), pp. 313–45. Geological Society of London, Special Publication no. 42.CrossRefGoogle Scholar
Wang, XS, Bi, XW, Leng, CB, Zhong, H, Tang, HF, Chen, YW, Yin, GH, Huang, DZ and Zhou, MF (2014) Geochronology and geochemistry of Late Cretaceous igneous intrusions and Mo–Cu–(W) mineralization in the southern Yidun terrane, SW China: implications for metallogenesis and geodynamic setting. Ore Geology Reviews 61, 73–95.CrossRefGoogle Scholar
Wang, P, Dong, GC, Santosh, M, He, WY, Li, XF and Dong, ML (2016) Zircon U–Pb geochronology, geochemistry and Hf isotopes of the Late Cretaceous Hongshan intrusion, western Yunnan. Geological Journal 51, 308–23.CrossRefGoogle Scholar
Wang, P, Dong, GC, Santosh, M, Li, XF and Dong, ML (2017) Triassic ore-bearing and barren porphyries in the Zhongdian Arc of SW China: implications for the subduction of the Palaeo-Tethys Ocean. International Geology Review 59, 1490–505.CrossRefGoogle Scholar
Wang, XF, Metcalfe, I, Jian, P, He, LQ and Wang, CS (2000) The Jinshajiang–Ailaoshan suture zone, China: tectonostratigraphy, age and evolution. Journal of Asian Earth Sciences 18, 675–90.CrossRefGoogle Scholar
Wang, BQ, Zhou, MF, Chen, WT, Gao, JF and Yan, DP (2013) Petrogenesis and tectonic implications of the Triassic volcanic rocks in the northern Yidun Terrane, Eastern Tibet. Lithos 175–176, 285–301.CrossRefGoogle Scholar
Wang, BQ, Zhou, MF, Li, JW and Yan, DP (2011) Late Triassic porphyritic intrusions and associated volcanic rocks from the Shangri-La region, Yidun terrane, Eastern Tibetan Plateau: adakitic magmatism and porphyry copper mineralization. Lithos 127, 24–38.CrossRefGoogle Scholar
Watson, EB and Harrison, TM (1983) Zircon saturation revisited: temperature and composition effects in a variety of crustal magma types. Earth and Planetary Science Letters 64, 295–304.CrossRefGoogle Scholar
Winther, KT (1996) An experimentally based model for the origin of tonalitic and trondhjemitic melts. Chemical Geology 127, 43–59.CrossRefGoogle Scholar
Winther, KT and Newton, RC (1991) Experimental melting of hydrous low-K tholeiite: evidence on the origin of Archaean cratons. Geological Society of Denmark Bulletin 39, 213–28.Google Scholar
Wu, T, Xiao, L, Wilde, SA, Ma, CQ and Zhou, JX (2017) A mixed source for the Late Triassic Garzê-Daocheng granitic belt and its implications for the tectonic evolution of the Yidun arc belt, eastern Tibetan Plateau. Lithos 288–289, 214–30.CrossRefGoogle Scholar
Xiao, L, He, Q, Pirajno, F, Ni, PZ, Du, JX and Wei, QR (2008) Possible correlation between a mantle plume and the evolution of Paleo-Tethys Jinshajiang Ocean: evidence from a volcanic rifted margin in the Xiaru–Tuoding area, Yunnan, SW China. Lithos 100, 112–26.CrossRefGoogle Scholar
Xu, SJ, Yu, HB, Wang, RC, Lu, HP and Fang, Z (2002) Sm–Nd and Rb–Sr isotopic ages of Shaba granulite from Western Sichuan province and their geological significance. Geological Journal of China Universities 8, 399–406 (in Chinese with English abstract).Google Scholar
Yang, TN, Hou, ZQ, Wang, Y, Zhang, HR and Wang, ZL (2012) Late Paleozoic to Early Mesozoic tectonic evolution of northeast Tibet: evidence from the Triassic composite western Jinsha–Garze–Litang suture. Tectonics 31, 1–20.CrossRefGoogle Scholar
Yin, A and Harrison, TM (2000) Geologic evolution of the Himalayan–Tibetan orogen. Annual Review of Earth and Planetary Sciences 28, 211–80.CrossRefGoogle Scholar
Zeng, PS, Li, WC, Wang, HP and Li, H (2006) The indosinian Pulang superlarge porphyry copper deposit in Yunnan, China: petrology and chronology. Acta Petrologica Sinica 22, 989–1000 (in Chinese with English abstract).Google Scholar
Zhang, CC, Sun, WD, Wang, JT, Zhang, LP, Sun, SJ and Wu, K (2017) Oxygen fugacity and porphyry mineralization: a zircon perspective of Dexing porphyry Cu deposit, China. Geochimica et Cosmochimica Acta 206, 343–63.CrossRefGoogle Scholar
Zindler, A and Hart, S (1986) Chemical geodynamics. Annual Review of Earth and Planetary Sciences 14, 493–571.CrossRefGoogle Scholar
Supplementary material: File

Dong et al. supplementary material

Dong et al. supplementary material

Download Dong et al. supplementary material(File)
File 443.4 KB