Abstract
New40Ar-39Ar thermochronological results from the Ladakh region in the India-Asia collision zone provide a tectono-thermal evolutionary scenario. The characteristic granodiorite of the Ladakh batholith near Leh yielded a plateau age of 46.3 ± 0.6 Ma (2σ). Biotite from the same rock yielded a plateau age of 44.6 ± 0.3 Ma (2σ). The youngest phase of the Ladakh batholith, the leucogranite near Himya, yielded a cooling pattern with a plateau-like age of ∼ 36 Ma. The plateau age of muscovite from the same rock is 29.8 ±0.2 Ma (2σ). These ages indicate post-collision tectono-thermal activity, which may have been responsible for partial melting within the Ladakh batholith. Two basalt samples from Sumdo Nala have also recorded the post-collision tectono-thermal event, which lasted at least for 8 MY in the suture zone since the collision, whereas in the western part of the Indus Suture, pillow lava of Chiktan showed no effect of this event and yielded an age of emplacement of 128.2 ±2.6 Ma (2σ). The available data indicate that post-collision deformation led to the crustal thickening causing an increase in temperature, which may have caused partial melting at the base of the thickened crust. The high thermal regime propagated away from the suture with time.
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References
Ahmad T, Thakur V C, Islam R, Khanna P P and Mukherjee P K 1998 Geochemistry and geodynamic implications of magmatic rocks from the Trans-Himalayan arc;Geochem. J. 32 383–404
Ahmad T, Tanaka T, Sachan H K, Asahara Y, Islam R and Khanna P P 2003 Geochemical and isotopic constraints on the age and origin of the Nidar Ophiolitic Complex, Indus Suture Zone, Ladakh India, Abstracts; 18thHim. Kara. Tibet workshop 15
Beck R A, Burbank D W, Sercombe W J, Riley G W, Bery J R, Afzal J, Khan A M, Jurgen H, Cheema A, Shafique N A, Lawrence R D and Khan M A 1995 Stratigraphic evidence for an early collision between northwest India and Asia;Nature 373 55–58
Bhutani R, Pande K and Desai N 2003 Age of the Karakoram fault activation: an40Ar-39Ar geochronological study of Shyok suture zone in northern Ladakh, India;Curr. Sci. 84 1454–1458
Brookfield M E and Reynolds P H 1981 Late Cretaceous emplacement of Indus Suture Zone, ophiolitic mélange and an Eocene-Oligocene magmatic arc on the northern edge of the Indian plate;Earth Planet. Sci. Lett. 55 157–162
Clift P D, Carter A, Krol M and Kirby E 2002 Constraints on India-Eurasia collision in the Arabian sea region taken from the Indus group, Ladakh Himalaya, India; In:The tectonic and climate evolution of the Arabian sea region (ed) Clift P Det al, Spec. Publ. Geol. Soc. London 195
Colchen M, Mascle G and Van Haver T 1986 Some aspects of collision tectonics in the Indus Suture Zone, Ladakh; In:Collision Tectonics, (eds) Coward M P and RiesSpec. Publ. Geol. Soc. London 19 173–184
de Sigoyer J, Chavagnac V, Villa I M, Luais B, Guillot S, Cosca M and Mascle G 2000 Dating the Indian continental subduction and collisional thickening in the Northwest Himalaya: Multichronology of the Tso Morari eclogites;Geology 28 487–490
de Sigoyer J, Guillot S and Dick P 2004 Exhumation of the ultrahigh-pressure Tso Morari unit in eastern Ladakh (NW Himalaya): A case study;Tectonics 23 1–18
Dewey J F and Burk K C A 1973 Tibetan, Variscan and Precambrian basement reactivation: products of continental collision;J. Geol. 81 683–692
Dewey J F, Cande S and Pitman W C 1989 Tectonic evolution of the India/Eurasia collision zone;Eclogae. Geol. Helve. 82 717–734
Dubey A K 2004 Structural evolution of Himalaya: field studies, experimental models, and implications for seismicity;Him. Geol. 25 33–50
George M T, Harris N and Butler R W H 1993 The tectonic implications of contrasting granite magmatism between the Kohistan island arc and the Nanga Parbat-Harmosh massif, Pakistan Himalaya; In:Himalayan tectonics, (eds) Treloar P J and Searle M PSpec. Publ. Geol. Soc. London 74 173–191
Guillot S, Garzanti E, Baratoux D, Marquer D, Maheo G and de Sigoyer J 2003 Reconstructing the total shortening history of the NW Himalaya;Geochem., Geophys., Geosyst. 7 1–22
Hebert R, Beaudoin G, Varfalvy V, Huot F, Wang C S and Liu Z F 2000 Yarlung Zangbo ophiolites, Southern Tibet revisited;Earth Sci. Front. 7 124–126
Honegger K, Dietrich V, Frank W, Ganser A, Thoni M and Trommsdrof V 1982 Magmatism and metamorphism in the Ladakh Himalayas (the Indus-Tsangpo suture zone);Earth Planet. Sci. Lett. 60 253–292
Kohn M J and Parkinson C D 2002 Petrologic case for Eocene slab break off during the India-Asian collision;Geology 30 591–594
Krol M A, Zeitler P K and Copeland P 1996 Episodic unroofing of the Kohistan Batholith, Pakistan: Implications from K-feldspar thermochronology;J. Geophys. Res. 101 28, 149–28, 164
Le Fort P 1986 Metamorphism and magmatism during Himalayan Collision. In:Collision tectonics (eds) Coward M P and Ries A CSpec. Publ. Geol. Soc. London 19 159–172
Lovera O M, Grove M and Harrison T M 1989 The40Ar/39Ar thermochronometry for slowly cooled samples having a distribution of diffusion domain sizes;J. Geophys. Res. 94 17,917–17,935
Lovera O M, Heizler M T and Harrison T M 1993 Argon diffusion domains in K-feldspar, II: Kinetic properties of MH-10;Contrib. Mineral. Petrol. 113 381–393
Maheo G, Bertrand H, Guillot S, Villa I M, Keller F and Capiez P 2004 The south Ladakh ophiolites (NW Himalaya, India): an intra-oceanic tholeiitic arc origin with implication for the closure of the Neo-Tethys;Chem. Geol. 203 273–303
McDougall I and Harrison T M 1999Geochronology and Thermochronology by 40Ar/39 Ar method (Oxford University Press)
Parrish R R and Tirrul R 1989 U-Pb age of the Baltoro granite, northwest Himalaya, and implications for zircon inheritance and monazite U-Pb systematics;Geology 17 1076–1079
Patriat P and Achache J 1984 India-Eurasia collision chronology has implications for crustal shortening and driving mechanism of plates;Nature 311 615–621
Petterson M G and Windley B F 1985 Rb-Sr dating of the Kohistan arc-batholith in the Trans-Himalaya of north Pakistan, and tectonic implications;Earth and Planet. Sci. Lett. 74 45–57
Reuber I 1986 Geometry of accretion and oceanic thrusting of the Spongtang ophiolite, Ladakh Himalaya;Nature 321 592–596
Reuber I 1989 The Dras Arc: two successive volcanic events on eroded oceanic crust;Tectonophysics 161 93–106
Reynolds P H, Brookfield M E, Halifex G and McNutt R H 1983 The age and nature of Mesozoic-Tertiary magmatism across the Indus Suture Zone, in Kashmir and Ladakh (NW India and Pakistan);Geol. Rund. 72 981–1004
Rowley D B 1996 Age of initiation of collision between India and Asia: A review of stratigraphic data;Earth and Planet. Sci. Lett. 145 1–13
Scharer U, Copeland P, Harrison T M and Searle M P 1990 Age cooling history and origin of post-collisional leucogranites in the Karakoram batholith: A multisystem isotope study, N. Pakistan;J. Geol. 98 233–251
Searle M, Corfield R I, Stephenson B and McCarron J 1997 Structure of the North Indian continental margin in the Ladakh-Zanskar Himalayas: Implications for the timing of obduction of the Spongtang ophiolite, India-Asia collision and deformation events in the Himalaya;Geol. Mag. 134 297–316
Searle M P, Khan M A, Fraser J E, Gough S J and Jan M Q 1999 The tectonic evolution of the Kohistan-Karakoram collision belt along the Karakoram Highway transect, north Pakistan;Tectonics 18 929–949
Sharma K K and Gupta K R 1978 Some observations on the geology of Indus and Shyok valleys between Leh and Panamik, District Ladakh, Jammu and Kashmir, India;Recent Researches in Geology 7 133–143
Sharma K K and Choubey V M 1983 Petrology, geochemistry and geochronology of the southern margin of the Ladakh batholith between Upshi and Chumathang; In:Geology of the Indus Suture Zone of Ladakh (eds) Thakur V C and Sharma K K 41–60
Sharma K K 1990 Petrology, Geochemistry and Geochronology of the Ladakh Batholith and its role in the evolution of Ladakh magmatic arc; In: Geology and Geodynamic Evolution of the Himalayan Collision Zone; (ed) Sharma K KPhysics and Chemistry of the Earth 17 173–193
Sinha A K and Upadhyay R 1993 Mesozoic Neo-Tethyn pre-orogenic deep marine sediments along Indus-Yarlung Suture Himalaya;Terra Nova 5 461–473
Sorkhabi R B, Jain A K, Nishimura S, Itaya T, Lal N, Manickavasagam R M and Tagami T 1994 New age constraints on cooling and unroofing history of the Trans-Himalayan Ladakh Batholith (Kargil area), NW India;Proc. Indian Acad. Sci. (Earth Planet. Sci.) 103 83
Thakur V C and Bhat M I 1983 Interpretation of Tectonic Environment of Nidar Ophiolite: A Geochemical approach; In:Geology of Indus Suture Zone of Ladakh (eds) Sharma K K and Thakur V C 21–31
Thakur V C and Misra D K 1983 Ophiolitic mélanges in the Indus suture zone: lithological descriptions and structural features; In: Geology of Indus Suture Zone of Ladakh (ed) Sharma K K and Thakur V C 79–91
Treloar P J, Rex D C, Guise P G, Coward M P, Searle M P, Windley B F, Petterson M G, Jan M Q and Luff IW 1989 K/Ar and Ar/Ar geochronology of the Himalayan collision in NW Pakistan: constraints on the timing of suturing, deformation, metamorphism and uplift;Tectonics 8 881–909
Upadhyay R 2002 Straitigraphy and tectonics of Ladakh, eastern Karakoram, western Tibet and western Kunlun;J. Geol. Soc. India 59 447–467
Venketesan T R, Pande K and Gopalan K 1993 Did Deccan volcanism pre-date the Cretacious/Tertiary transition?;Earth and Planet. Sci. Lett. 119 181–189
Virdi N S 1987 Northern margin of the Indian Plate—some litho-tectonic constraints;Tectonophysics 134 29–38
Weinberg R F and Dunlap W J 2000 Growth and deformation of the Ladakh Batholith, northwest Himalayas: Implications for timing of continental collision and origin of calc-alkaline batholith;J. Geol. 108 303–320
Wyllie P J 1984 Constraints imposed by experimental petrology on possible and impossible magma sources and products;Phil. Trans. Roy. Soc. London A310 439–456
Zeitler P K and Fitz Gerald J D 1986 Saddle shaped40Ar/39 age spectra from Young, microstructurally complex potassium feldspars;Geochim. Cosmochim. Acta 50 1185–1199
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Bhutani, R., Pande, K. & Venkatesan, T.R. Tectono-thermal evolution of the India-Asia collision zone based on40Ar-39Ar thermochronology in Ladakh, India. J Earth Syst Sci 113, 737–754 (2004). https://doi.org/10.1007/BF02704033
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DOI: https://doi.org/10.1007/BF02704033