 | | Journal (article/letter/editorial) | | tectonic activity along the northern margin of India Dilip Saha* Geological Studies Unit, Indian Statistical...Statistical Institute, 203 B.T. Road, Kolkata 700108, India a r t i c l e i n f o a b s t r a c t Article...of Eastern Himalaya, namely the Daling Group in Sikkim and the Bomdila Group in Arunachal Pradesh, provide...sea/ocean along the northern margin of Paleoproterozoic India. Such deformation fabrics are absent in the upper...formations in the Lesser Himalaya of Darjeeling-Sikkim indicating influence of older orogeny. Kinematic |  | | Journal (article/letter/editorial) | | Banaras Hindu University, Varanasi, Uttar Pradesh, India The paper presents the petrological and geochronological...Banaras Hindu University, Varanasi, Uttar Pradesh, India. Email: dprakashbhu@gmail.com from the area characteristically...gioclase‐biotite‐sillimanite‐(kyanite)‐garnet‐ilmenite‐rutile along with Medium‐ to high‐grade crystalline...Himalaya are Early to Middle Miocene rang- the Sikkim‐Darjeeling Himalayan region, the rock units are...Petrological studies of the HHCS in Darjeeling‐Sikkim area have been carried out by a number of workers |  | | Journal (article/letter/editorial) | | along Darjeeling–Tista transect, Eastern Himalaya, India: constraints from textural relationship, phase equilibria...Uttar Pradesh, India 2 Wadia Institute of Himalayan Geology, Dehradun, Uttarakhand, India The Darjeeling–Tista...Geology, Banaras Hindu University, Varanasi-221005, India. E-mail: suparnatewari87@gmail.com Carmichael (1970)...and Eastern Sikkim, respectively. All these preliminary findings in the Darjeeling–Sikkim Himalaya were...(Uttarakhand, Nepal) and Eastern Himalaya (Darjeeling–Sikkim, Bhutan, Arunachal Pradesh) (Fig. 1a). The shortening |  | | Journal (article/letter/editorial) | | development of inverted metamorphism in the Darjeeling-Sikkim region of the eastern Himalaya A. MOHAN Department...Geology, Banaras Hindu University, Varanasi 221005, India B. F. WINDLEY AND M. P. SEARLE Department of Geology...Leicester LE1 7RH, UK ABSTRACT The Darjeeling-Sikkim region provides a classic example of inverted Himalayan...thrusting that occurred as a result of the collision of India with Eurasia. Mallet (1874) was amongst the earliest...the metamorphic zones in Darjeeling and eastern Sikkim respectively. These preliminary findings were further |  | Catlos, E. J., Dubey, C. S., Harrison, T. M., Edwards, M. A. (2004) Late Miocene movement within the Himalayan Main Central Thrust shear zone, Sikkim, north-east India. Journal of Metamorphic Geology, 22 (3) 207-226 doi:10.1111/j.1525-1314.2004.00509.x | Journal (article/letter/editorial) | | Himalayan Main Central Thrust shear zone, Sikkim, north-east India E. J. CATLOS,1 C. S. DUBEY,2 T. M. HARRISON3...edu) 2 Department of Geology, University of Delhi, India 3 Research School of Earth Sciences, The Australian...A-1090, Austria ABSTRACT In the Sikkim region of north-east India, the Main Central Thrust (MCT) juxtaposes...immediately underlie the thrust, and the large-scale South Tibet Detachment System (STDS) bounds the northern...monazite ages indicate that the MCT shear zone in the Sikkim region was active at c. 22, 14–15 and 12–10 Ma |  | Gaidies, F., Petley-Ragan, A., Chakraborty, S., Dasgupta, S., Jones, P. (2015) Constraining the conditions of Barrovian metamorphism in Sikkim, India:P-T-tpaths of garnet crystallization in the Lesser Himalayan Belt. Journal of Metamorphic Geology, 33 (1) 23-44 doi:10.1111/jmg.12108 | Journal (article/letter/editorial) | | Barrovian Accepted Article metamorphism in Sikkim, India: P –T –t paths of garnet b Institut crystallization... Silchar, Assam, India Institute of Science Education and Research, Kolkata, India ABSTRACT Garnet...staurolite zones of the Lesser Himalayan Belt in Sikkim is modelled utilizing Gibbs free energy minimization...from the inverted Barrovian metamorphic zones of Sikkim with forward-modelling of metamorphic crystallization...exhumation associated with the Himalayan orogeny in Sikkim and provides new constraints on models of associated |  | Mottram, Catherine M., Warren, Clare J., Regis, Daniele, Roberts, Nick M.W., Harris, Nigel B.W., Argles, Tom W., Parrish, Randall R. (2014) Developing an inverted Barrovian sequence; insights from monazite petrochronology. Earth and Planetary Science Letters, 403. 418-431 doi:10.1016/j.epsl.2014.07.006 | Journal (article/letter/editorial) | | geochronology a b s t r a c t In the Himalayan region of Sikkim, the well-developed inverted metamorphic sequence...conditions of ∼580 ◦ C and 8.5 kbar at ∼16 Ma in the south, and 9–10 Ma in the north. In the southern transect...the Himalayan Main Central Thrust in the Sikkim region of India. Petrochronology techniques that combine...ca. 4–6 Ma around the exposed MCT rocks in the Sikkim Himalaya and (3) the timing of melting in the hanging...footwall. Overall, our data show that the MCT in Sikkim was active for at least 11 Ma during the Miocene |  | | Journal (article/letter/editorial) | | 2004.00522.x Inverted metamorphic sequence in the Sikkim Himalayas: crystallization history, P–T gradient...Sciences, Jadavpur University, Kolkata 700 032, India 2 Department of Geosciences, University of Arizona...Geological Survey of India, Kolkata 700 016, India ABSTRACT The metapelitic rocks of the Sikkim Himalayas show...with the observed trend(s) of P–T variation in Sikkim and in other sections. A discussion is presented...structural and petrological study of the IMS in the Sikkim Himalayas (Neogi et al., 1998; Ganguly et al., |  | Zhang, Zeming, Xiang, Hua, Dong, Xin, Li, Wangchao, Ding, Huixia, Gou, Zhengbin, Tian, Zuolin (2017) Oligocene HP metamorphism and anatexis of the Higher Himalayan Crystalline Sequence in Yadong region, east-central Himalaya. Gondwana Research, 41. 173-187 doi:10.1016/j.gr.2015.03.002 | Journal (article/letter/editorial) | | orogenic belt generated through the collision of India with Eurasia. Our CE P petrological study and...quartz, plagioclase, K-feldspar, rutile and AC ilmenite, and a late sillimanite- and/or cordierite-bearing...belt is a typical collisional orogen produced by India-Asia D collision during Cenozoic. As this belt...Himalayan orogen and extrusion of the HHCS. IP T In Sikkim and Yadong region in east-central Himalaya, the...Crd=cordierite, Grs=grossular, Grt=garnet, Ilm=ilmenite, Kfs=K-feldspar, Ky=kyanite, Ms=muscovite, |  | | Report (edition) | | HkwfoKku % ,d eSuqvy A MANUAL OF THE GEOLOGY OF INDIA fo'ks"k izdk'ku laa- 77 Special Publication No....Hkkjrh; HkwoSKkfud losZ{k.k GEOLOGICAL SURVEY OF INDIA PGSI-458 65-2022 (DSK-II) 1851 Hkkjrh; HkwoSKkfud...GEOLOGICAL SURVEY OF INDIA Hkkjr dk HkwfoKku % ,d eSuqvy A MANUAL OF THE GEOLOGY OF INDIA fo'ks"k izdk'ku...izdkf'kr Published by order of the Government of India 2022 INDIA, GEOLOGICAL SURVEY (2022) Compiled by S...Published by Director General, Geological Survey of India, 27, Jawaharlal Nehru Road, Kolkata-700016 First |  | | Report (chapter) | | Himalaya was regarded as evidence for a diachronous India–Asia collision. Despite the along-strike regional...by the tectonic activities associated with the India–Asia collision and intervening island arc(s) and...information related to the timing of the onset of the India–Asia collision, crustal shortening, regional deformation...authors have reported the timing of first contact of India with Asia around 65–50 Ma (e.g. Patriat & Achache...timing of the India– Asia collision. Guillot et al. (2008) suggested a diachronous India–Asia collision |  | | Journal (article/letter/editorial) | | crustal melting in the Higher Himalayan Crystallines (Sikkim, Eastern Himalaya) inferred from trace element-constrained...Higher Himalayan Crystalline (HHC) exposed in Sikkim, India. The metapelites underwent pervasive partial...Education and Research, Salt Lake, Kolkata 700064, India 31 and 17 Ma, but widespread and diachronous across...lenses. We identify two sections of the HHC in Sikkim that traversed similar P–T conditions at different...known orogenic process—the ongoing collision of India with Asia. The rocks are recent and no overprinting |  | Mottram, Catherine M., Warren, Clare J., Halton, Alison M., Kelley, Simon P., Harris, Nigel B.W. (2015) Argon behaviour in an inverted Barrovian sequence, Sikkim Himalaya: The consequences of temperature and timescale on 40 Ar/ 39 Ar mica geochronology. Lithos, 238. 37-51 doi:10.1016/j.lithos.2015.08.018 | Journal (article/letter/editorial) | | Argon behaviour in an inverted Barrovian sequence, Sikkim Himalaya: The consequences of temperature and timescale...the associated inverted metamorphic zone in the Sikkim region of the eastern Himalaya. This transect provides...setting During the Eocene to recent collision of India and Asia (e.g. Najman et al., 2010 and references...Himalayan region of Darjeeling-Sikkim (collectively known as the Sikkim Himalaya), the MCT is exposed...tectonic processes underpinning the formation of the Sikkim Himalayan MCT zone sequence differ from those operating |  | Harris, N. B. W., Caddick, M., Kosler, J., Goswami, S., Vance, D., Tindle, A. G. (2004) The pressure-temperature-time path of migmatites from the Sikkim Himalaya. Journal of Metamorphic Geology, 22 (3) 249-264 doi:10.1111/j.1525-1314.2004.00511.x | Journal (article/letter/editorial) | | pressure–temperature–time path of migmatites from the Sikkim Himalaya N. B. W. HARRIS,1 M. CADDICK,2 J. KOSLER...hanging wall of the Main Central Thrust (MCT) from Sikkim has provided a unique insight into the pressure–temperature–...probably in response to movement on the MCT and on the South Tibetan detachment to the north. Key words: garnet...garnet zoning; migmatite; pseudosection; Sikkim Himalaya; Sm–Nd dating. INTRODUCTION Understanding the...orogenic channel. The Main Central Thrust The MCT in Sikkim Crustal thickening during the Himalayan orogeny |  | Clarke, G. L., Bhowmik, S. K., Ireland, T. R., Aitchison, J. C., Chapman, S. L., Kent, L. (2016) Inverted Oligo-Miocene metamorphism in the Lesser Himalaya Sequence, Arunachal Pradesh, India; age and grade relationships. Journal of Metamorphic Geology, 34 (8) 805-820 doi:10.1111/jmg.12202 | Journal (article/letter/editorial) | | the Lesser Himalaya Sequence, Arunachal Pradesh, India; age and grade relationships G.L. CLARKE1, S.K....Indian Institute of Technology, Kharagpur-721 302, India 3 Research School of Earth Sciences, Australian... recent precise geochronological work from the Sikkim Himalaya indicates systematic relationships between...Himalayan orogen; and (2) oblique convergence between India and Myanmar beneath the Indo-Burman range (Ding...occur with varying proportions of tourmaline and ilmenite. The lower boundary of the biotite zone has This |  | | Journal (article/letter/editorial) | | Himalayan Crystalline (HHC) pelitic migmatites, Sikkim Himalaya National Geophysical Research Institute...Hyderabad 500007, India Abstract Higher Himalayan Crystalline (HHC) complex of the Sikkim Himalaya predominantly...al., 1987; Hickmott and Shimizu, 1990). In the Sikkim region, the lithounits display a horse-shoe shaped...of north-dipping normal faults constituting the South Tibetan Detachment System (STDS). The HHC predominantly...Himalayan Crystalline (HHC) pelitic migmatites of Sikkim Himalaya by using the distribution of trace elements |  | | Journal (article/letter/editorial) | | Characterisation of a garnet population from the Sikkim Himalaya: insights into the rates and mechanisms...schist from the Lesser Himalayan Sequence of Sikkim (India) provides insight into the rates and kinetic...Mangan M 27˚30’’ SIKKIM 24-99 Gangtok RT BHUTAN MCT Darjeeling RT MBT The Sikkim Himalaya is situated...situated in northeast India, near the eastern syntaxis of the Himalayan orogen (Fig. 1). The large-scale...large-scale structure of Sikkim closely resembles that of other Himalayan regions, resulting from the continued |  | | Journal (article/letter/editorial) | | garnet-grade metapelite from the Barrovian sequence of the Sikkim Himalaya is assessed using quantified LA-ICP-MS...crystallised garnet population in a metapelite from the Sikkim Himalaya. A LA-ICP-MS raster mapping technique...context and sample description The Sikkim Himalaya, located in north-east India, comprises a well-documented...biotite, quartz and plagioclase, with accessory ilmenite, tourmaline, allanite, apatite and zircon. A full...sigmoidal inclusion trails comprising aligned ilmenite, apatite, allanite and flattened quartz that are |  | Mukhopadhyay, Dilip K., Chakraborty, Sumit, Trepmann, Claudia, Rubatto, Daniela, Anczkiewicz, Robert, Gaidies, Fred, Dasgupta, Somnath, Chowdhury, Priyadarshi (2017) The nature and evolution of the Main Central Thrust: Structural and geochronological constraints from the Sikkim Himalaya, NE India. Lithos, 282. 447-463 doi:10.1016/j.lithos.2017.01.015 | Journal (article/letter/editorial) | | geochronological constraints from the Sikkim Himalaya, NE India Dilip K. Mukhopadhyay, Sumit Chakraborty...geochronological constraints from the Sikkim Himalaya, NE India, LITHOS (2017), doi:10.1016/j.lithos.2017...geochronological constraints from the Sikkim Himalaya, NE India SC R Dilip K. Mukhopadhyaya, Sumit Chakrabortyb*...Institute of Technology Roorkee, 247667 Roorkee, India b Institut für Geologie, Mineralogie und Geophysik...Sciences, Jamia Millia Islamia, New Delhi-110025, India. *Corresponding Author- Sumit Chakraborty, Institut |  | | Journal (article/letter/editorial) | | the Lesser and Higher Himalayan domains of Sikkim, India K. FAAK,1 S. CHAKRABORTY1 AND S. DASGUPTA2 1...DC-35 ⁄ 1, Sector 1, Salt Lake, Kolkata-700 064, India ABSTRACT The metamorphic history of the Himalayas...Himalayan (LH) and the Higher Himalayan (HH) domains in Sikkim. These have similar bulk chemical compositions...retrograde phase in some rocks. Minor phases are ilmenite, chlorite, titanite and rutile. The rocks were...pre-Himalayan. Key words: metabasites; P–T path; Sikkim Himalaya; thermobarometry. INTRODUCTION Most |  | Neogi, S., Dasgupta, S., Fukuoka, M. (1998) High P-T Polymetamorphism, Dehydration Melting, and Generation of Migmatites and Granites in the Higher Himalayan Crystalline Complex, Sikkim, India. Journal of Petrology, 39 (1) 61-99 doi:10.1093/petroj/39.1.61 | Journal (article/letter/editorial) | | in the Higher Himalayan Crystalline Complex, Sikkim, India SUDIPTA NEOGI1, SOMNATH DASGUPTA2∗ AND MASATO...SURVEY OF INDIA, CENTRAL PETROLOGICAL LABORATORIES, 15 KYD STREET, CALCUTTA-700 016, INDIA 2 DEPARTMENT...SCIENCES, JADAVPUR UNIVERSITY, CALCUTTA-700 032, INDIA 3 DEPARTMENT OF EARTH AND PLANETARY SCIENCES,...lithostatic gradient, which suggests that the HHC in Sikkim represents an inverted Barrovian sequence. This...Higher Himalayan Crystalline Complex (HHC) in Sikkim, India, consists of pelitic migmatites interlayered |  | Chakraborty, S., Anczkiewicz, R., Gaidies, F., Rubatto, D., Sorcar, N., Faak, K., Mukhopadhyay, D.K., Dasgupta, S. (2016) A review of thermal history and timescales of tectonometamorphic processes in Sikkim Himalaya (NE India) and implications for rates of metamorphic processes. Journal of Metamorphic Geology, 34 (8) 785-803 doi:10.1111/jmg.12200 | Journal (article/letter/editorial) | | timescales of tectonometamorphic processes in Sikkim Himalaya (NE India) and implications for rates of metamorphic...Bengal 700073 India 6 Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India 7 Department...Uttarakhand 247667, India ABSTRACT The lesser and greater Himalayan sequences (LH and GH) in Sikkim have been...well-preserved sequences in the northeast Indian state of Sikkim that have been studied using a variety of modern...lesser and greater Himalayan (LH and GH) rocks of Sikkim and then discuss how these reveal a complex array |  | | Book | | Chakrabarti Director (retd.), Geological Survey of India AMSTERDAM • BOSTON • HEIDELBERG • LONDON • NEW...Medlicott (Memoirs of the Geological Survey of India, vol. 3, 1864) was the first attempt to provide...a part of the Himalaya. “A Manual of geology of India, Part II: extra-peninsular area” by H.B. Medlicott... as there was little geological information on Sikkim, Bhutan, and Arunachal available at that time,...all the geotectonic units from the north to the south and from the east to the west. In a treatise like |  | Ding, Huixia, Zhang, Zeming, Dong, Xin, Tian, Zuolin, Xiang, Hua, Mu, Hongchen, Gou, Zhengbin, Shui, Xinfang, Li, Wangchao, Mao, Lingjuan (2016) Early Eocene ( c . 50 Ma) collision of the Indian and Asian continents: Constraints from the North Himalayan metamorphic rocks, southeastern Tibet. Earth and Planetary Science Letters, 435. 64-73 doi:10.1016/j.epsl.2015.12.006 | Journal (article/letter/editorial) | | of investigations, the nature and timing of the India–Asia collision remain debated. In the western Himalaya...2007), Namche Barwa Syntaxis (Zhang et al., 2015a), Sikkim and Yadong (Kellett et al., 2013; Rubatto et al...key constraint on the nature and timing of the India–Asia collision in southeastern Tibet. Methods of...Himalayan Arc (Fig. 1; Yin and Harrison, 2000). From south to north in increasing structural height they are:...separated from the underlying Siwalik Group by the south vergent Main Boundary Thrust (MBT); the Higher Himalayan |  | Phukon, Purbajyoti, Sen, Koushik, Singh, Praveen Chandra, Sen, Aranya, Srivastava, Hari B., Singhal, Saurabh (2019) Characterizing anatexis in the Greater Himalayan Sequence (Kumaun, NW India) in terms of pressure, temperature, time and deformation. Lithos, 344. 22-50 doi:10.1016/j.lithos.2019.04.018 | Journal (article/letter/editorial) | | anatexis in the Greater Himalayan Sequence (Kumaun, NW India) in terms of pressure, temperature, time and deformation...anatexis in the Greater Himalayan Sequence (Kumaun, NW India) in terms of pressure, temperature, time and deformation...anatexis in the Greater Himalayan Sequence (Kumaun, NW India) in terms of pressure, temperature, time and deformation...Dehradun-248001; India 2 Department of Earth Science; Indian Institute of Technology Bombay; India 3 Department...Institute of Science; Banaras Hindu University; India NU ABSTRACT: SC *Corresponding Author: koushik |
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