naa a22 4500 510756735 CHVBK 20180411083125.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s12594-013-0182-8 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0182-8 Fluid inclusion study of the Higher Himalayan quartzitic pelites, Garhwal Himalaya, India: Implications for recrystallization history of metasediments [Elektronische Daten] [Himanshu Sachan, Anubhooti Saxena, Preeti Verma, Santosh Rai, Aditya Kharya] Quartzitic pelites forms a part of Higher Himalayan Crystalline of higher geotectonic zone in Garhwal Himalaya. Quartzitic pelites (locally known as Pandukeshwar Quartzite) in Garhwal Himalaya is sandwiched between high grade metamorphic rocks of Central Crystallines and Badrinath Formation. Fluid inclusion studies are carried out on the detrital, and recrystallized quartz grains of quartzitic pelites to know about the fluid phases present during recrystallization processes at the time of maximum depth of burial. The quartzitic pelite (Pandukeshwar Quartzite) essentially consists of recrystallised quartz with accessory minerals like mica and feldspar. Fluid microthermometry study reveals the presence of three types of fluids: (i) high-salinity brine, (ii) CO2-H2O and (iii) H2O-NaCl. These fluids were trapped during the development of grain and recrystallization processes. The high saline brine inclusions and CO2-H2O fluid with the density of 0.90 to 0.97 gm/cm3 are remnants of provenance area. CO2 density in detrital quartz grains characterise the protolith of the sandstone as granite or metamorphic rock. The H2O-NaCl fluids involved in the recrystallization processes at temperature-pressure of 430-350°C; 4.8 to 0.5 Kbars as constrained by fluid isochores of CO2-H2O and H2O-NaCl inclusions and bulging and subgrain development during recrystallization processes. The re-equilibration of the primary fluid due to elevated internal and confining pressure is evident from features like ‘C' shaped cavities, stretching of the inclusions, their migration and decrepitation clusters. The observed inclusion morphology revealed that the rocks were exhumed along an isothermal decompression path. Geological Society of India, 2013 Fluid Inclusions nationallicence Recrystallization nationallicence P-T condition nationallicence Quartzitic pelites nationallicence Garhwal Himalaya nationallicence Sachan Himanshu Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut Saxena Anubhooti Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut Verma Preeti Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut Rai Santosh Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut Kharya Aditya Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut Journal of the Geological Society of India Springer India 82/5(2013-11-01), 509-518 0016-7622 82:5<509 2013 82 12594 https://doi.org/10.1007/s12594-013-0182-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0182-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sachan Himanshu Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut NATIONALLICENCE 700 1- Saxena Anubhooti Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut NATIONALLICENCE 700 1- Verma Preeti Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut NATIONALLICENCE 700 1- Rai Santosh Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut NATIONALLICENCE 700 1- Kharya Aditya Wadia Institute of Himalayan Geology, 248 001, Dehra Dun, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer India 82/5(2013-11-01), 509-518 0016-7622 82:5<509 2013 82 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer