Geological Observations from a Palaeolake Basin, Lamayuru, Ladakh, Northwestern Himalaya
- 1 Department of Geology, Kurukshetra University, Kurukshetra, India
- 2 Department of Geology, Kurukshetra University, Kurukshetra, India
Abstract
A well known Buddhist monastery of Lamayuru is located in a village about 128 Km West of Leh. It is situated on more than 100 m thick Late Quaternary palaeolake deposits which are surrounded by rocks of Lamayuru Formation. Geologically, the Lamayuru Formation includes the Lamayuru and Namikala flysch deposits of Triassic-Jurassic age. This Formation is composed of shales, schist and phyllites. This Lamayuru Formation forms the base and source of palaeolake deposits. In Late-Pleistocene (35 ka B.P.) the Lamayuru River was dammed due to tectonically triggered landslide and the Lamayuru palaeolake came into existence. The sedimentation in the palaeolake basin commenced at 35 ka B.P. and culminated at 1 ka B.P. The deposits of palaeolake consist of carbonaceous mud, sand, silty clay and matrix supported breccia. The palaeolake deposits are a product of complex interplay of lacustrine, fluvio-deltaic to colluvial processes. The research study shows the prevalence of glacio-lacustrine conditions during the major part of depositional history as evidenced by the dominance of varves in these deposits.
- Thakur, V.C. (1981) Regional Framework Geodynamic Evolution of the Indus-Tsangpo Suture Zone in the Ladakh Himalaya. Earth Science, 72, 89-97. https://doi.org/10.1017/S0263593300009925
- Thakur, V.C. (1980) Tectonics of the Central Crystallines of Western Himalaya. Tectonophysics, 62, 141-151. https://doi.org/10.1016/0040-1951(80)90142-0
- Fort, M., Burbank, D.W. and Freytet, P. (1989) Lacustrine Sedimentation in a Semiarid Alpine Setting: An Example from Ladakh, NW Himalaya. Quaternary Research, 31, 332-350. https://doi.org/10.1016/0033-5894(89)90041-0
- Bagati, T.N. and Thakur, V.C. (1998) Quaternary Basins of Ladakh and Lahaul Spiti in North-Western Himalaya. Current Science, 64, 898-903.
- Kotlia, B.S., Bhalla, M.S., Shah, N. and Rajagopalan, G. (1998) Palaeomagnetic Results from the Pleistocane-Holocene Lake Deposits of Bhimtal and Bhowali (Kumaun Himalaya) and Lamayuru (Ladakh Himalaya) with Reference to the Reversal Events. Journal Geological Society of India, 51, 7-20.
- Shukla, V.K., Kotlia, B.S. and Mathur, P.D. (2002) Sedimentation Pattern in a Trans-Himalayan Quaternary Lake at Lamayuru (Ladakh), India. Sedimentary Geology, 148, 405-424. https://doi.org/10.1016/S0037-0738(01)00160-9
- Cunningham, A. (1854) Ladakh, Physical, Statistical and Historical. London.
- Drew, F. (1875) Jummoo and Kashmir Territories. Stanford, London.
- Dainelli, G. (1922) Studi sul glaciale. In: Spedizione italiane de Fillipi nell’Himalaia Caracorum e Turchestan Cinese (1931-1914). Sec. II. Resultati Geologici e Geografici, 3(1), N. Zanchelli, Bologna.
- Pandey, K. (1975) A Brief History of Lamayuru Monastery. Hindu Art Press, Godowlja.
- Burgisser, H.M., Gansser, A. and Pika, J. (1982) Late Glacial Lake Sediments of the Indus Valley Area, North-Western Himalaya. Eclogae Geologicae Helveticae, 75, 51-63.
- Bagati, T.N., Mazari, R.K. and Rajagopalan, G. (1996) Paleotectonic Implications of Lamayuru Lake (Ladakh). Current Science, 71, 479-482.
- Kotlia, B.S., Shukla, U.K., Bhalla, M.S., Mathur, P.D. and Pant, C.C. (1997) Quaternary Fluvio-Lacustrine Deposits of the Lamayuru Basin, Ladakh Himalaya: Preliminary Multidisciplinary Investigations. Geologic Magazine, 134, 807-812. https://doi.org/10.1017/S0016756897007826
- Kachroo, R.K., Kulshreshta, S.K. and Gupta, V.J. (1984) Upper Pleistocene Ostracods from Lamayuru Ladakh. Geoscience Journal, 5, 63-68.