LA-ICP-MS zircon U-Pb age and geochemical characteristics of the acid intrusive rocks in the Lhaguo Tso area of Bangong-Nujiang suture zone, Tibet

  • Yufeng Zhong
  • Ji Duo
  • Qinggao Zeng
  • Xiaoyu Huang
  • Qiang Ye
  • Haiyong Liu
GCEC 2017
Part of the following topical collections:
  1. Global Sustainability through Geosciences and Civil Engineering


The Bangong-Nujiang suture zone lies in the central part of the Tibetan Plateau. It is not only an important plate suture zone, which has direct controlling effect on magmatic activities and tectonic evolution of South Qiangtang and North Gangdese, but it is also an important metallogenic belt. Its tectonic evolution is closely related to the evolution history of the whole Tibetan plateau. In this paper, zircon U-Pb dating of the acid intrusive rocks in Lhaguo Tso has been conducted. Chronologically, the rock types are medium-fine-grained granodiorite (γδaK1) → medium-grained granodiorite (γδbK1) → fine-grained biotite adamellite (ηγβaK1) → medium-fine-grained biotite adamellite (ηγβbK1). The formation time ranges from 113.7 to 100.3 Ma, and the magmatic activity is concentrated in Lower Cretaceous, coincided with the Lower Cretaceous magmatism of the Northern Gangdese terrane. The intrusive rocks in the research area are characterized by high silica (SiO2 = 59.96~78.03%), potassium-rich (K2O = 2.04~4.71%), alkali-rich (K2O + Na2O = 6.08~8.5%), peralkaline to peraluminous (A/CNK = 0.89~1.25), and high calc-alkaline to shoshonitic. The intrusive rocks in each stage are obviously enriched with LREE and high field elements (such as Th, Ta, Hf), and relatively depleted large ion lithophile elements (such as Ba, K, Sr). Total REE ranges from 82.53 × 10−6 to 203.91 × 10−6, with LREE/HREE of 82.53 × 10−6~203.91 × 10−6, (La/Sm)N of 1.68~14.77, (Gd/Yb)N of 0.92~1.84, and middle negative Eu anomalies (δEu = 0.07~0.94). Based on the above discussions, we propose that the geochemical characteristics of these intrusive rocks are consistent with those of arc-type magmas worldwide. Comprehensive research shows that Lhaguo Tso intrusive rocks in the Bangong-Nujiang Tethys ocean crust of southward subduction background, formed in a typical island arc tectonic background, suggesting that the Bangong-Nujiang ocean in the Lower Cretaceous (113~100 Ma) is still under the southward subduction of the Northern Gangdese terrane, may not have been closed.


Bangong-Nujiang suture zone Zircon U-Pb Lower Cretaceous Intrusive rocks Lhaguo Tso Tibet 



We are grateful to all members of the 1:50000 regional geological survey of Nieercuo for their work. We thank Prof. Zeng for help with the manuscript. Finally, we thank two anonymous reviewers and the editors for insightful comments that improved this paper.

Funding information

This research was supported by the program of China Geological Survey (DD20160026).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.


  1. Andersen T (2002) Correction of common lead in U-Pb analyses that do not report 204Pb. Chem Geol 192:59–79. CrossRefGoogle Scholar
  2. Batchelor B, Bowden P (1985) Petrogenetic interpretation of granitoid rock series using multicationic parameters. Chem Geol 48:43–55. CrossRefGoogle Scholar
  3. Chappell BW, White AJR (1992) I-and S-type granites in the Lachlan Fold Belt[J]. Trans R Soc Edinb Earth Sci 83:1–26Google Scholar
  4. Coira B, Mahlburg Kay S, Viramonte J (1994) Upper Cenozoic magmatic evolution of the Argetine Puna: a model for changing subduction geometry. Int Geol Rev 35:677–720. CrossRefGoogle Scholar
  5. Crofu F, Hanchar JM, Hoskin PW (2003) Atlas of zircon textures. Rev Mineral Ge-ochemy 53:469–495. CrossRefGoogle Scholar
  6. Deng JF, Xiao QH, Su SG, Liu C, Zhao GC, Wu ZX, Liu Y (2007) Igneous petrotectonic assemblages and tectonic settings: a discussion. Geol J China Univ 13(3):392–402 (in Chinese with English abs.\
  7. Fan JJ, Li C, Wang M, Xie CM (2014) Discussion on closure time of Bangong Lake-Nujiang suture zone: constraints from oceanic island and formation. In: Annual meeting of Chinese Geoscience Union (CGU), 1912-1913 (in Chinese with English abs. )Google Scholar
  8. Gao SB, Zheng YY, Wang JS, Zhang Z, Yang C (2011) The geochronology and geochemistry of intrusive rocks in Bange area: Constraints on the evolution time of the Bangong Lake-Nujiang ocean basin. Acta Petrol Sin 27(7):1973–1982 in Chinese with English abs. ). https://doi. org/1000–0569/2011/027 (07)−1973–82Google Scholar
  9. Geng QR, Pan GT, Wang LQ, Peng ZM, Zhang Z (2011) Tethyan evolution and metallogenic geological background of the Bangong co-Nujiang belt and the Qiangtang massif in Tibet. Geol Bull China 30(8):1261–1274 (in Chinese with English abs. ).
  10. Gutscher MA, Maury R, Eissen JP (2000) Can slab melting be caused by flat subdution? Geology 28(6):535–538. CrossRefGoogle Scholar
  11. Li JG and Qu D (1993) CuoQin-Namucuo suture zone geological characteristics and prospecting significance. Geology of Tibet 10(2):38–44 (in Chinese with English abstract)Google Scholar
  12. Li XH, Li WX, Li ZX (2007) Further discussion on the genesis types and tectonic significance of early Yanshanian granites in Nanling [J]. Chinese Sci Bull 52(9):981–991 (in Chinese)Google Scholar
  13. Maniar PD, Piccoli PM (1989) Tectonic discrimination of granitoids. Geol Soc Am Bull 101(5):635–643.
  14. Mo XX, Deng JF, Dong FL, Yu XH, Wang Y, Zhou S, Yang WG (2001) Volcanic petrotectonic assemblages in Sanjiang orogenic belt, SW China and implication for tectonics. Geol J China Univ 7(2):121–138 in Chinese with English abs.Google Scholar
  15. Pan GT, Ding J. Yao DS (2003) Geology map of Qinghai-Tibet plateau and its adjacent areas. Mapping Publishing House of Chengdu 1–47(in Chenese)Google Scholar
  16. Pan GT, Mo XX, Hou ZQ, Zhu DC, Wang LQ, Li GM, Zhao ZD, Geng QR, Liao ZL (2006) Spatial-temporal framework of the Gangdese Orogenic Belt and its evolution. Acta Petrol Sin 22(3):521–533 in Chinese with English abs.Google Scholar
  17. Pan GT, Wang LQ, Li RS et al (2012) Tectonic evolution of the Qinghai-Tibet plateau. J Asia Earth Sci 53:3–14 (in Chinese with English abs). CrossRefGoogle Scholar
  18. Pearce JA (1996) Sources and setting of granitic rocks. Episodes 19(4):120–125Google Scholar
  19. Peccerillo A, Taylor SR (1976) Geochemistry of eocene calc-alkaline volcanic rocks from the Kastamonu area, northern Turkey. Contrib Mineral Petrol 58(1):63–81CrossRefGoogle Scholar
  20. Ramos VA (1999) Plate tectonic setting of the andean cordillera. Episodes 22(3):183–190Google Scholar
  21. Rowley DB, Xue F, Tucker RD (1997) Ages of ultra-high pressure metamorphic and source orthognisses from the eastern Dabie Shan: U/Th zircon geochronology. Earth Planet Sci Lett 151:191–203CrossRefGoogle Scholar
  22. Sun SS and McDonough WF (1989) Chemical and isotopic systematics of oceanic basalts: Implications for the mantle composition and processes. In: Saunders AD and Norry MJ (eds) Magmatism in Ocean Basins. Geological Society, Special Publications, London, 42:313–345CrossRefGoogle Scholar
  23. Tibet Bureau of Geology and Minerals Resources (1993) The field geological records of Tibet. Geological Publishing House, Beijing, pp 264–393 (in Chinese)Google Scholar
  24. Wang BD, Xu JF, Zeng QG et al (2007) Geochemistry and genesis of Lhaguo Tso ophiolite in south of Gerze area, Center Tibet[J]. Acta Petrologica Sinica 2(6):1521-1530.
  25. Wei SG, Tang JX, Song Y, Liu ZB, Wang Q, Lin B, He W, Feng J (2017) Petrogenesis, zircon U-Pb geochronology and Sr-Nd-Hf isotopes of the intermediate-felsic volcanic rocks from the Duolong deposit in the Bangonghu-Nujiang suture zone, Tibet and its tectonic singnificance. Acta Petrol Sin 91(1):132–150 in Chinese with English abs.Google Scholar
  26. Wolf MB, London D (1994) Apatite dissolution into peraluminous haplogranitic melts: an experimental study of solubilities and mechanisms. Geochimica et Cosmochimica Acta 58(19):4127–4145CrossRefGoogle Scholar
  27. Wu GY, Wang XP, Zhong DL (1999) Early Cretaceous Andean-type arc volcanic in SE Tibet, China. Acta Petrol Sin 15(3):422–429 in Chinese with English abs.Google Scholar
  28. Xiao XC, Li TD (2000) The tectonic evolution and uplift mechanism of the Qinghai-Tibet plateau. Guangdong Science and Technology Press, Guangzhou, 83–122, 138–190 (in Chinese with English abstract)Google Scholar
  29. Zhang YX, Zhang KJ, Li B, Wang Y et al (2007) Zircon SHRIMP U-Pb geochronology and petrogenesis of the plagiogranites from the Lagkor Lake ophiolite Gerze, Tibet, China. Chinese Science Bulletin 52(1):100–106 (in Chinese).
  30. Zhang XF, Li YG, Cao XM, Qu XM, Xin HB, Wang J, Du DD (2014) LA-ICP-MS zircon U-Pb age and geochemical characteristics of the acid intrusive rocks in the western part of Bangong Lake-Nujiang River suture zone. Geological Bulletin of China 33(7):984–994 in Chinese with English abs.Google Scholar
  31. Zhu DC, Pan GT, Mo XX et al (2006) Identification of the Mesozoic oIB-type basalts in central Qinghai-Tibetan Plateau: geochronogy, geochemistry and their tectonic setting. Acta Geol Sinica 80:1312–1328 (in Chinese with English abstract).
  32. Zhu D, Pan G, Mo X et al (2007) Petrogenesis of volcanic rocks in the Sangxiu Formation, central segment of Tethyan Himalaya: A probable example of plume–lithosphere interaction[J]. J Asia Earth Sci 29(2-3):0–335. CrossRefGoogle Scholar
  33. Zhu DC, Pan GT, Chung SL, Liao ZL, Wang LQ, Li GM (2008a) SHRIMP zircon age and geochemical constrains on the origin of Lower Jurassic volcanic rocks from the Yeba Formation, Southern Gangdese, South Tibet. Int Geol Rev 50:442–471. CrossRefGoogle Scholar
  34. Zhu DC, Pan GT, Wang LQ, Mo XX, Zhao ZD, Zhou CY, Liao ZL, Dong GC, Yuan SH (2008b) Spatial and temporal variations of Mesozoic magmatic rocks in the Gangdese belt, Tibet and discussions on geodynamic setting-related issues involved in their generation. Geol Bull China 27(9):1535–1550 (in Chinese with English abs. )Google Scholar
  35. Zhu DC, Zhao ZD, Pan GT, Lee HY, Kang ZQ, Liao ZL et al (2009) Early cretaceous subduction-related adakite-like rocks of the gangdese belt, southern tibet: products of slab melting and subsequent melt–peridotite interaction? J Asian Earth Sci 34(3):298–309. CrossRefGoogle Scholar
  36. Zhu DC, Zhao ZD, Niu Y, Mo XX, Chung SL, Hou ZQ et al (2011) The lhasa terrane: record of a microcontinent and its histories of drift and growth. Earth Planet Sci Lett 301(1–2):241–255. CrossRefGoogle Scholar

Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.Geological Prospecting Team of Sichuan Geological and Mineral BureauChengduChina
  2. 2.Chengdu University of TechnologyChengduChina
  3. 3.ChengduChina
  4. 4.Chinese Academy of EngineeringBeijingChina
  5. 5.Geological Survey Institute of TibetLhasaChina

Personalised recommendations