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40Ar/39Ar isochron ages of lawsonite blueschists from Jiuquan in the northern Qilian Mountain, NW China, and their tectonic implications

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  • Geochemistry
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Chinese Science Bulletin

Abstract

Using laser 40Ar/39Ar dating method, we have gotten the metamorphic ages of lawsonite blueschist and epidote blueschist from Jiuquan, northern Qilian Mountain, NW China. The high quality laser 40Ar/39Ar dating of glaucophane from lawsonite blueschist gives an isochron age of 413±5 Ma. The isochron age obtained from phengite in epidote blueschist is 415±7 Ma. These data, combining with peak metamorphic P-T conditions and regional geological setting, allow us to infer that the lower limit of the ages of the prograde subduction metamorphism from lawsonite blueschist facies to epidote blueschist facies occurred at ca. 413–415 Ma, which also suggests that the formation of lawsonite blueschist in the northern Qilian Mountain maybe resulted from the corner flow in the cold subduction zone. This study shows that the final closing time of the northern Qilian remnant oceanic basin is about 413–415 Ma, which also represents the convergent age between the North China Craton and the Qaidam block.

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References

  1. Dong S B. The general features and distributions of the glaucophane schist belts of China (in Chinese). Acta Geol Sin, 1989, 3: 273–284

    Google Scholar 

  2. Wu H Q, Feng Y M, Hou Y. The discovery of Ordovician lawsonite-glaucophane schist in the middle section of the northern Qilian Mountain, Sunan County, Gansu Province, and its significance (in Chinese). Geol Rev, 1990, 3: 277–280

    Google Scholar 

  3. Wu H Q, Feng Y M, Song S G. Metamorphism and deformation of blueschist belts and their implications, North Qilian Mountain, China. J Met Geol, 1993, 11: 523–536

    Article  Google Scholar 

  4. Song S G. Metamorphic geology of blueschists, eclogites and ophiolites in the North Qilian Mountain. In: 30th IGC Field Trip Guide T392. Beijing: Geological Publishing House, 1996. 40

    Google Scholar 

  5. Zhang L F, Wang Q J, Song S G. Lawsonite blueschist in Northern Qilian, NW China: PT pseudosections and petrologic implications. J Asian Earth Sci, 2009, 35: 354–366

    Article  Google Scholar 

  6. Zuo G, Wu H Q. A bisubduction collision orogenic model of Early Paleozoic in the middle part of North Qilian area (in Chinese). Adv Earth Sci, 1997, 12: 315–323

    Google Scholar 

  7. Wang Q, Liu X Y. On Caledonian polycyclic paired metamorphic belts of Qilian Mountain, northwest China. In Huang T K, Li C Y, eds. Contributions to Tectonics of China and Adjacent Regions (in Chinese). Beijing: Geological Publishing House, 1981. 92–101

    Google Scholar 

  8. Song S G. Tectonic evolution of subductive complex belts in the North Qilian Mountain (in Chinese). Adv Earth Sci, 1997, 12: 351–365

    Google Scholar 

  9. Xiao X, Chen G, Zhu Z. A preliminary study on the tectonics of ancient ophiolites in the Qilian Mountain, Northwest China (in Chinese). Acta Geol Sin, 1978, 52: 281–295

    Google Scholar 

  10. Zhang Q, Sun X M, Zhou D J, et al. The characteristics of North Qilian ophiolites, forming settings and their tectonic significance (in Chinese). Adv Earth Sci, 1997, 12: 366–393

    Google Scholar 

  11. Feng Y M, He S P. Orogenic Process of the Qilian Mountain (in Chinese). Beijing: Geological Publishing House, 1996

    Google Scholar 

  12. Xia L, Xia Z, Xu X. Dynamics of tectono-volcano-magmatic evolution from the northern Qilian Mountain, China (in Chinese). Northwest Geosci, 1995, 16: 1–28

    Google Scholar 

  13. Leake B E, Woolley A R, Arps C E, et al. Nomenclature of amphiboles: Report of the subcommittee on amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. Am Miner, 1997, 82: 1019–1037

    Google Scholar 

  14. De Capitani C, Brown T H. The computation of chemical equilibrium in complex systems containing ono-ideal solutions. Geochim Cosmochim Acta, 1987, 51: 2639–2652

    Article  Google Scholar 

  15. Deino A L, Orsi G, Vita S D, et al. The age of the Neapolitan Yellow Tuff caldera-forming eruption (Campi Flegrei caldera-Italy) assessed by 40Ar/39Ar dating method. J Volcanol Geotherm Res, 2004, 133: 157–170

    Article  Google Scholar 

  16. Kuiper K F, Deino A, Hilgen F J, et al. Synchronizing rock clocks of Earth history. Science. 2008, 30: 500–504

    Article  Google Scholar 

  17. Riley T R, Leat P T, Curtis M L, et al. Early-Middle Jurassic dolerite dykes from western Dronning Maud Land (Antarctica): Identifying mantle sources in the Karoo large igneous province. J Petrol 2005, 46: 1489–1524

    Article  Google Scholar 

  18. Cloos M. Flow melanges: Numerical modeling and geologic constraints on their origin in the Franciscan subduction complex. California. GSA Bull, 1982, 93: 330–345

    Article  Google Scholar 

  19. Cloos M. Thermal evolution of convergent plate margins: Thermal modeling and reevaluation of isotopic Ar-ages for blueschists in the Franciscan complex of California. Tectonics, 1985, 4: 421–433

    Article  Google Scholar 

  20. Anczkiewicz R, Platt J P, Thirlwall M T, et al. Franciscan subduction off to a slow start: Evidence from high-precision Lu-Hf garnet ages on high grade-blocks. Earth Planet Sci Lett, 2004, 225: 147–161

    Article  Google Scholar 

  21. Laura F, Giovanni C, Laura C, et al. 39Ar/40Ar dating of high-pressure rocks from the Ligurian Alps: Evidence for a continuous subduction-exhumation cycle. Earth Planet Sci Lett, 2005, 240: 668–680

    Article  Google Scholar 

  22. Laura F, Laura C, Marco S, et al. Ophiolite mélange zone records exhumation in a fossil subduction channel, Geology, 2007, 35: 499–502

    Article  Google Scholar 

  23. Daniela R, Jörg H. Exhumation as fast as subduction. Geology, 2001, 29: 3–6

    Article  Google Scholar 

  24. Song S G, Zhang L F, Niu Y L, et al. Zircon U-Pb SHRIMP ages of eclogites from the North Qilian Mountain in NW China and their tectonic implication. Chinese Sci Bull, 2004, 49: 848–852

    Google Scholar 

  25. Zhang J X, Meng F C, Wan Y S. A cold Early Palaeozoic subduction zone in the North Qilian Mountain, NW China: Petrological and U-Pb geochronological constraints. J Metamorph Geol, 2007, 25: 285–304

    Article  Google Scholar 

  26. Liu Y J, Neubauer F, Genser J, et al. 40Ar/39Ar ages of blueschist facies politic schists from Qingshuigou in the Northern Qilian Mountain, western China. Island Arc, 2006, 15: 187–198

    Article  Google Scholar 

  27. Song S, Niu Y, Zhang L F, et al. Tectonic evolution of early Paleozoic HP metamorphic rocks in the North Qilian Mountain, NW China: New perspectives. J Asian Earth Sci, 2009, 35: 285–297

    Article  Google Scholar 

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Authors and Affiliations

  1. The Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education of China; School of Earth and Space Sciences, Peking University, Beijing, 100871, China

    YiHui Lin, LiFei Zhang, JianQing Ji, QianJie Wang & ShuGuang Song

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  1. YiHui Lin
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  2. LiFei Zhang
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  3. JianQing Ji
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  4. QianJie Wang
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  5. ShuGuang Song
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Correspondence to LiFei Zhang.

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Lin, Y., Zhang, L., Ji, J. et al. 40Ar/39Ar isochron ages of lawsonite blueschists from Jiuquan in the northern Qilian Mountain, NW China, and their tectonic implications. Chin. Sci. Bull. 55, 2021–2027 (2010). https://doi.org/10.1007/s11434-010-3239-8

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  • DOI: https://doi.org/10.1007/s11434-010-3239-8

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