International Journal For Multidisciplinary Research

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Structural Architectures of Precambrian Metamorphites in and Around Rongmil –Rongjeng Area, East Garo Hills Districts Meghalaya

Author(s) Niva Rani Devi
Country India
Abstract The present work elucidates the Precambrian metamorphites in and around Rongmil-Rongjeng area in the light of their polydeformational episodes that witness four pfases of deformation showing multiple interference patterns in the ductlile to brittle fields. Field as well as microstructural study reveals that all the pre existing depositional fabrics have been affected by BD1, the first phase of deformation under progressive metamorphic phase leading to the formation of most dominant, highly penetrative schistose and gneissose fabrics of rocks of amphibolites facies. The second phase of deformation, BD2 forming NW-SE trending up and down facing folds of probable plane non cylindrical nature, was responsible for layer parallel shortening (buckling) of the mechanically active BS0 and BS1 fabrics in the NW-SE longitudinal compressive tectonics. The third phase folds, BF3 refolded the earlier set of folds into non –plane non cylindrical nature and occur as non coaxial, open warp type gently plunging with near vertical axial plane striking NW-SE direction. BD4, the fourth phase deformation is considered as brittle phase and represents the joints, fractures and fault structures.
Keywords Metamorphites, Rongmil, Rongjeng, Meghalaya
Field Sociology > Geology
Published In Volume 5, Issue 6, November-December 2023
Published On 2023-12-31
Cite This Structural Architectures of Precambrian Metamorphites in and Around Rongmil –Rongjeng Area, East Garo Hills Districts Meghalaya - Niva Rani Devi - IJFMR Volume 5, Issue 6, November-December 2023. DOI 10.36948/ijfmr.2023.v05i06.11346
DOI https://doi.org/10.36948/ijfmr.2023.v05i06.11346
Short DOI https://doi.org/gtbtfn

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