naa a22 4500 510755585 CHVBK 20180411083121.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s12594-013-0060-4 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0060-4 Field and textural relationship in pelitic schists and gneisses from the area around Mangpu, Darjeeling district, West Bengal [Elektronische Daten] [D. Prakash, S. Tewari] The metasedimentary rocks of the area around Mangpu constitute a portion of the hinge zone of the northern limb of the major synform of Lower Darjeeling Himalaya. The rocks display evidences of multiple deformation and at least three major phases of deformation have been recognized. The time relations between the phases of deformation (D1, D2, D3) and metamorphic crystallization reveal a single major prograde metamorphic event that initiated with the D1 deformation and finally outlasted it. The earlier phase of this metamorphism is essentially regional syn-tectonic lowgrade (greenschist facies) which may be designated (M1, early). This was followed by regional static metamorphism (M1, late) in the post-tectonic phase between D1 and D2 deformations (upper green schist and amphibolite facies). This M1 metamorphism is superposed by later retrogressive metamorphism (M2) during the D2 and D3 deformations (lower greenschist facies). Within the study area four isograds have been delineated by the first appearance of index minerals in the pelitic schists and gneiss which display Barrovian type of metamorphism. Geological Society of India, 2013 Prakash D. Centre of Advanced study in Geology, Banaras Hindu University, 221 005, Varanasi, India aut Tewari S. Centre of Advanced study in Geology, Banaras Hindu University, 221 005, Varanasi, India aut Journal of the Geological Society of India Springer-Verlag 81/4(2013-04-01), 451-454 0016-7622 81:4<451 2013 81 12594 https://doi.org/10.1007/s12594-013-0060-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0060-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Prakash D. Centre of Advanced study in Geology, Banaras Hindu University, 221 005, Varanasi, India aut NATIONALLICENCE 700 1- Tewari S. Centre of Advanced study in Geology, Banaras Hindu University, 221 005, Varanasi, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer-Verlag 81/4(2013-04-01), 451-454 0016-7622 81:4<451 2013 81 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer