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研究生: 丁氏 惠
Hue-Thi Dinh
論文名稱: Structural and metamorphic evolution of the Day Nui Con Voi massif, Northeast Vietnam
Structural and metamorphic evolution of the Day Nui Con Voi massif, Northeast Vietnam
指導教授: 葉孟宛
Yeh, Meng-Wan
學位類別: 碩士
Master
系所名稱: 地球科學系
Department of Earth Sciences
論文出版年: 2015
畢業學年度: 103
語文別: 英文
論文頁數: 115
中文關鍵詞: Day Nui Con Voi40Ar/39Ar datingRed River Shear Zone
英文關鍵詞: Day Nui Con Voi, 40Ar/39Ar dating, Red River Shear Zone
論文種類: 學術論文
相關次數: 點閱:93下載:17
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  • The Day Nui Con Voi massif in North Vietnam is the southernmost part of the Red River Shear Zone in Southeast Asia. It is a narrow NW-SE trending high-grade metamorphic zone composed of amphibolite, migmatite, mylonite and gneiss. Structural analyses suggest that Day Nui Con Voi experienced at least 3 generations of ductile deformation. The oldest Dn-2 event formed NNW-SSE striking upright folds. The Sn-2 foliations parallel sillimanite and mymerkite indicated the Dn-2 event should occurred around amphibolite facies (>600 °C) metamorphic condition. The Dn-1 event is associated with subhorizontal folds with subhorizontal fold axial plane Sn-1 within the central region of the massif. The mineral assemblages of sillimanite + biotite + quartz + plagioclase + K-feldpar + muscovite suggest that the temperature of Dn-1 deformation is around 600 to 550°C. The Dn-1 structures are refolded by Dn, which formed a dome like structure with NW-SE striking Sn fold axial plane. Sillimanite boudinage necks filled by muscovite indicates that the Dn happened at lower temperature (<550oC). The youngest ductile deformation formed mylonite zone with left-lateral kinematic indicators on both limbs of the dome. Structural and petrological analyses suggest that left-lateral shearing happen synchronously with doming event (Dn deformation). Our new 40Ar/39Ar age data shows the cooling age of hornblende about 26 Ma, phlogopite from 23 to 24 Ma and K-feldspar from 21 to 23 Ma. Muscovite represents the age of both cooling and crystallization ages from 22 to 24 Ma. Basing on different age of different minerals relating to different closure temperatures, cooling history of the Day Nui Con Voi massif is reconstructed. Combining results of petrological analyses and cooling history, we constrains that left-lateral shearing event likely occurred during 26 ~ 22 Ma causing rapid cooling of the massif. From these conclusions, we propose that strike slip movement along Red River Shear Zone may not relate to opening of the South China Sea.

    The Day Nui Con Voi massif in North Vietnam is the southernmost part of the Red River Shear Zone in Southeast Asia. It is a narrow NW-SE trending high-grade metamorphic zone composed of amphibolite, migmatite, mylonite and gneiss. Structural analyses suggest that Day Nui Con Voi experienced at least 3 generations of ductile deformation. The oldest Dn-2 event formed NNW-SSE striking upright folds. The Sn-2 foliations parallel sillimanite and mymerkite indicated the Dn-2 event should occurred around amphibolite facies (>600 °C) metamorphic condition. The Dn-1 event is associated with subhorizontal folds with subhorizontal fold axial plane Sn-1 within the central region of the massif. The mineral assemblages of sillimanite + biotite + quartz + plagioclase + K-feldpar + muscovite suggest that the temperature of Dn-1 deformation is around 600 to 550°C. The Dn-1 structures are refolded by Dn, which formed a dome like structure with NW-SE striking Sn fold axial plane. Sillimanite boudinage necks filled by muscovite indicates that the Dn happened at lower temperature (<550oC). The youngest ductile deformation formed mylonite zone with left-lateral kinematic indicators on both limbs of the dome. Structural and petrological analyses suggest that left-lateral shearing happen synchronously with doming event (Dn deformation). Our new 40Ar/39Ar age data shows the cooling age of hornblende about 26 Ma, phlogopite from 23 to 24 Ma and K-feldspar from 21 to 23 Ma. Muscovite represents the age of both cooling and crystallization ages from 22 to 24 Ma. Basing on different age of different minerals relating to different closure temperatures, cooling history of the Day Nui Con Voi massif is reconstructed. Combining results of petrological analyses and cooling history, we constrains that left-lateral shearing event likely occurred during 26 ~ 22 Ma causing rapid cooling of the massif. From these conclusions, we propose that strike slip movement along Red River Shear Zone may not relate to opening of the South China Sea.

    Acknowledgments Abstract I List of figures IV List of tables VI List of minerals abbreviation VI Chapter 1: Introduction 1 1.1. Tectonic models for formation of Red River Shear Zone (RRSZ) 1 1.2. Relationship between RRSZ and opening of South China Sea (SCS) 2 1.3. The hypothesis of this studies 4 Chapter 2: Geological setting 5 Chapter 3: Methods 9 3.1. Structural and petrological methods 9 3.2. 40Ar/ 39Ar dating 10 Chapter 4: Results 13 4.1. Structural and petrological analysis 13 4.1.1. Dn-2 deformation event 15 4.1.2. Dn-1 deformation event 25 4.1.3. Dn deformation event 28 4.2. 40Ar/ 39Ar results 34 4.2.1. Hornblende 36 4.2.2. Phlogopite 37 4.2.3. Muscovite (White Mica) 44 4.2.4. K-feldspar 50 Chapter 5: Interpretations 54 Chapter 6: Discussions 57 6. 1. Timing of left-lateral shearing along RRSZ 57 6.2. Relationship between RRSZ and opening of South China Sea (SCS) 60 6.3. Tectonic evolution of Day Nui Con Voi massif 61 Chapter 7: Conclusions 67 References 68 Appendix 74

    Anczkiewicz, R., Viola, G., Müntener, O., Thirlwall, M.F., Villa, I.M., Quong, N.Q., 2007. Structure and shearing conditions in the Day Nui Con Voi massif: Implications for the evolution of the Red River shear zone in northern Vietnam. Tectonics 26, TC2002.
    Barker, A.J., 2013. Introduction to metamorphic textures and microstructures. Routledge.
    Briais, A., Patriat, P., Tapponnier, P., 1993. Updated interpretation of magnetic anomalies and seafloor spreading stages in the South China Sea: Implications for the Tertiary tectonics of Southeast Asia. Journal of Geophysical Research: Solid Earth (1978–2012) 98, 6299-6328.
    Brownlow, A., 1996. Geochemistry, 580 pp. Prentice-Hall, Old Tappan, NJ.
    Burchfiel, B.C., 2004. 2003 Presidential address: New technology, new geological challenges. GSA today 14, 4-9.
    Cande, S.C., Kent, D.V., 1995. Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and Cenozoic. Journal of Geophysical Research: Solid Earth (1978–2012) 100, 6093-6095.
    Carter, A., Roques, D., Bristow, C., Kinny, P., 2001. Understanding Mesozoic accretion in Southeast Asia: significance of Triassic thermotectonism (Indosinian orogeny) in Vietnam. Geology 29, 211-214.
    Chung, S.-L., Lee, T.-Y., Lo, C.-H., Wang, P.-L., Chen, C.-Y., Yem, N.T., Hoa, T.T., Genyao, W., 1997. Intraplate extension prior to continental extrusion along the Ailao Shan-Red River shear zone. Geology 25, 311-314.
    Clark, M.K., Royden, L.H., 2000. Topographic ooze: Building the eastern margin of Tibet by lower crustal flow. Geology 28, 703-706.
    England, P., Houseman, G., 1985. Role of lithospheric strength heterogeneities in the tectonics of Tibet and neighbouring regions. Nature 315, 297-301.
    England, P., Houseman, G., 1986. Finite strain calculations of continental deformation: 2. Comparison with the India‐Asia collision zone. Journal of Geophysical Research: Solid Earth (1978–2012) 91, 3664-3676.
    Forster, M., Lister, G., 2004. The interpretation of 40 Ar/39 Ar apparent age spectra produced by mixing: application of the method of asymptotes and limits. Journal of Structural Geology 26, 287-305.
    Gilley, L.D., Harrison, T.M., Leloup, P., Ryerson, F., Lovera, O.M., Wang, J.H., 2003. Direct dating of left‐lateral deformation along the Red River shear zone, China and Vietnam. Journal of Geophysical Research: Solid Earth (1978–2012) 108.
    Godin, L., Grujic, D., Law, R., Searle, M., 2006. Channel flow, ductile extrusion and exhumation in continental collision zones: an introduction. Geological Society, London, Special Publications 268, 1-23.
    Harrison, T.M., 1982. Diffusion of 40Ar in hornblende. Contributions to Mineralogy and Petrology 78, 324-331.
    Harrison, T.M., Célérier, J., Aikman, A.B., Hermann, J., Heizler, M.T., 2009. Diffusion of 40 Ar in muscovite. Geochimica et Cosmochimica Acta 73, 1039-1051.
    Harrison, T.M., Leloup, P., Ryerson, F., Tapponnier, P., Lacassin, R., Chen, W., 1996. Diachronous initiation of transtension along the Ailao Shan-Red River shear zone, Yunnan and Vietnam. WORLD AND REGIONAL GEOLOGY, 208-226.
    Haugerud, R.A., Kunk, M.J., 1988. ArAr: A Computer Program for Reduction of 40Ar-39Ar Data. US Geological Survey.
    Jolivet, L., Beyssac, O., Goffé, B., Avigad, D., Lepvrier, C., Maluski, H., Thang, T.T., 2001. Oligo‐Miocene midcrustal subhorizontal shear zone in Indochina. Tectonics 20, 46-57.
    Kelley, S., Wartho, J., 2000. Rapid kimberlite ascent and the significance of Ar-Ar ages in xenolith phlogopites. Science 289, 609-611.
    Kunk, M.J., Burton, W.C., 1999. 40Ar/39 Ar Age-spectrum Data for Amphibole, Muscovite, Biotite, and K-feldspar Samples from Metamorphic Rocks in the Blue Ridge Anticlinorium, Northern Virginia. Citeseer.
    Leloup, P.H., Arnaud, N., Lacassin, R., Kienast, J., Harrison, T., Trong, T., Replumaz, A., Tapponnier, P., 2001. New constraints on the structure, thermochronology, and timing of the Ailao Shan‐Red River shear zone, SE Asia. Journal of Geophysical Research: Solid Earth (1978–2012) 106, 6683-6732.
    Leloup, P.H., Harrison, T.M., Ryerson, F., Wenji, C., Qi, L., Tapponnier, P., Lacassin, R., 1993. Structural, petrological and thermal evolution of a Tertiary ductile strike‐slip shear zone, Diancang Shan, Yunnan. Journal of Geophysical Research: Solid Earth (1978–2012) 98, 6715-6743.
    Leloup, P.H., Lacassin, R., Tapponnier, P., Schärer, U., Zhong, D., Liu, X., Zhang, L., Ji, S., Trinh, P.T., 1995. The Ailao Shan-Red River shear zone (Yunnan, China), Tertiary transform boundary of Indochina. Tectonophysics 251, 3-84.
    Lepvrier, C., Faure, M., Van, V.N., Van Vu, T., Lin, W., Trong, T.T., Hoa, P.T., 2011. North-directed Triassic nappes in Northeastern Vietnam (East Bac Bo). Journal of Asian Earth Sciences 41, 56-68.
    Maluski, H., Lepvrier, C., Jolivet, L., Carter, A., Roques, D., Beyssac, O., Tang, T.T., Thang, N.D., Avigad, D., 2001a. Ar–Ar and fission-track ages in the Song Chay Massif: Early Triassic and Cenozoic tectonics in northern Vietnam. Journal of Asian Earth Sciences 19, 233-248.
    Maluski, H., Lepvrier, C., Jolivet, L., Carter, A., Roques, D., Beyssac, O., Tang, T.T., Thang, N.D., Avigad, D., 2001b. Ar–Ar and fission-track ages in the Song Chay Massif: Early Triassic and Cenozoic tectonics in northern Vietnam. Journal of Asian Earth Sciences 19, 233-248.
    McDougall, I., Harrison, T.M., 1999. Geochronology and Thermochronology by the 40Ar/39Ar Method. Oxford University Press.
    Metcalfe, I., 2006. Palaeozoic and Mesozoic tectonic evolution and palaeogeography of East Asian crustal fragments: the Korean Peninsula in context. Gondwana Research 9, 24-46.
    Nam, T.N., Toriumi, M., Itaya, T., 1998. P–T–t paths and post-metamorphic exhumation of the Day Nui Con Voi shear zone in Vietnam. Tectonophysics 290, 299-318.
    Palin, R., Searle, M., Waters, D., Parrish, R., Roberts, N., Horstwood, M., Yeh, M.W., Chung, S.L., Anh, T., 2013. A geochronological and petrological study of anatectic paragneiss and associated granite dykes from the Day Nui Con Voi metamorphic core complex, North Vietnam: constraints on the timing of metamorphism within the Red River shear zone. Journal of Metamorphic Geology 31, 359-387.
    Passchier, C.W., Trouw, R.A., 1996. Microtectonics. Springer.
    Searle, M., 2006. Role of the Red River Shear zone, Yunnan and Vietnam, in the continental extrusion of SE Asia. Journal of the Geological Society 163, 1025-1036.
    Searle, M.P., Elliott, J., Phillips, R., Chung, S.-L., 2011. Crustal–lithospheric structure and continental extrusion of Tibet. Journal of the Geological Society 168, 633-672.
    Searle, M.P., Yeh, M.-W., Lin, T.-H., Chung, S.-L., 2010. Structural constraints on the timing of left-lateral shear along the Red River shear zone in the Ailao Shan and Diancang Shan Ranges, Yunnan, SW China. Geosphere 6, 316-338.
    Spear, F.S., Kohn, M.J., Cheney, J.T., 1999. P-T paths from anatectic pelites. Contributions to Mineralogy and Petrology 134, 17-32.
    Siivola, J., Schmid, R., 2007. Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web version 01.02. 07.
    Steiger, R.H., Jäger, E., 1977. Subcommission on geochronology: convention on the use of decay constants in geo-and cosmochronology. Earth and planetary science letters 36, 359-362.
    Tapponnier, P., Lacassin, R., Leloup, P.H., Schärer, U., Dalai, Z., Haiwei, W., Xiaohan, L., Shaocheng, J., Lianshang, Z., Jiayou, Z., 1990. The Ailao Shan/Red River metamorphic belt: tertiary left-lateral shear between Indochina and South China.
    Tapponnier, P., Peltzer, G., Armijo, R., 1986. On the mechanics of the collision between India and Asia. Geological Society, London, Special Publications 19, 113-157.
    Tapponnier, P., Peltzer, G., Le Dain, A., Armijo, R., Cobbold, P., 1982. Propagating extrusion tectonics in Asia: New insights from simple experiments with plasticine. Geology 10, 611-616.
    Taylor, B., Hayes, D.E., 1983. Origin and history of the South China Sea basin. The Tectonic and Geologic Evolution of Southeast Asian Seas and Islands: Part 2, 23-56.
    Viola, G., Anczkiewicz, R., 2008. Exhumation history of the Red River shear zone in northern Vietnam: New insights from zircon and apatite fission-track analysis. Journal of Asian Earth Sciences 33, 78-90.
    Wagner, G., 1968. Fission track dating of apatites. Earth and Planetary Science Letters 4, 411-415.
    Wang, P.-L., Lo, C.-H., Chung, S.-L., Lee, T.-Y., Lan, C.-Y., Van Thang, T., 2000. Onset timing of left-lateral movement along the Ailao Shan–Red River Shear Zone: 40Ar/39Ar dating constraint from the Nam Dinh Area, northeastern Vietnam. Journal of Asian Earth Sciences 18, 281-292.
    Wang, P.-L., Lo, C.-H., Lee, T.-Y., Chung, S.-L., Lan, C.-Y., Yem, N.T., 1998. Thermochronological evidence for the movement of the Ailao Shan–Red River shear zone: a perspective from Vietnam. Geology 26, 887-890.
    Whitehead, J., Reynolds, P.H., Spray, J.G., 1996. 40Ar/39Ar age constraints on Taconian and Acadian events in the Quebec Appalachians. Geology 24, 359-362.
    Yeh, M.-W., Lee, T.-Y., Lo, C.-H., Chung, S.-L., Lan, C.-Y., Anh, T.T., 2008. Structural evolution of the Day Nui Con Voi metamorphic complex: Implications on the development of the Red River Shear Zone, Northern Vietnam. Journal of Structural Geology 30, 1540-1553.
    Yeh, M.-W., Wintsch, R., Liu, Y.-C., Lo, C.-H., Chung, S.-L., Lin, Y.-L., Lee, T.-Y., Wang, Y.C., Stokes, M., 2014. Evidence for Cool Extrusion of the North Indochina Block along the Ailao Shan Red River Shear Zone, a Diancang Shan Perspective. The Journal of Geology 122, 567-590.
    Żelaźniewicz, A., Hòa, T.T., Larionov, A.N., 2013. The significance of geological and zircon age data derived from the wall rocks of the Ailao Shan–Red River Shear Zone, NW Vietnam. Journal of Geodynamics 69, 122-139.
    Zhang, L.-S., Schärer, U., 1999. Age and origin of magmatism along the Cenozoic Red River shear belt, China. Contributions to Mineralogy and Petrology 134, 67-85.
    Zhang, R.Y., Lo, C.H., Chung, S.L., Grove, M., Omori, S., Iizuka, Y., Liou, J.G., Tri, T.V., 2013. Origin and Tectonic Implication of Ophiolite and Eclogite in the Song Ma Suture Zone between the South China and Indochina Blocks. Journal of Metamorphic Geology 31, 49-62.

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