naa a22 4500 510755321 CHVBK 20180411083120.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s12594-013-0042-6 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0042-6 Petrogenesis of ultramafic-mafic to felsic plutonic rock associations from southern portion of Chhotanagpur Gneissic Complex in Central India: A multi-stage crust-mantle interaction process [Elektronische Daten] [Kasturi Chakraborty, Abhinaba Roy] A granite-granodiorite-gabbro-ultramafic rock association occurs in the southern sector of Chhotanagpur Gneissic Complex in Central India. Field relations show mingling and mixing of mafic and granodioritic magmas along the contacts of the intrusives. Petrographic studies, coupled with analyses of phase compositions and bulk rock major and trace element compositions favor origin of mafic magma from partial melting of sub-continental hybridized lithospheric mantle and subsequent two stage emplacement. Initial ponding of mafic magma at basal crust elevated the geothermal gradient so as to cause partial melting of lower crustal materials and generation of granodioritic melt. Simultaneous emplacement of granodioritic and mafic magmas tapped from basal crustal reservoir at mid-crustal depth resulted in restricted mingling-mixing along the contacts of the contrasting magma types locally producing rocks of dioritic composition. The mode of evolution of this cogenetic mafic-felsic association, when combined with available geochronological data, has important implications in demarcation of the extent of Grenvellian orogen that resulted in amalgamation of the Southern Crustal Province of India (SCP) with the Bundelkhand Craton or Northern Crustal Province (NCP). Geological Society of India, 2013 Granite-granodiorite-gabbro-ultramafic association nationallicence Magma mingling-mixing nationallicence Grenvellian orogen nationallicence Chakraborty Kasturi Geological Survey of India, Southern Region, Hyderabad, India aut Roy Abhinaba Presidency University, Kolkata, India aut Journal of the Geological Society of India Springer-Verlag 81/3(2013-03-01), 309-329 0016-7622 81:3<309 2013 81 12594 https://doi.org/10.1007/s12594-013-0042-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0042-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chakraborty Kasturi Geological Survey of India, Southern Region, Hyderabad, India aut NATIONALLICENCE 700 1- Roy Abhinaba Presidency University, Kolkata, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer-Verlag 81/3(2013-03-01), 309-329 0016-7622 81:3<309 2013 81 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer