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Kar, Rajib
- Superposed Folding, Transposed Fabric Growth in Granulite Facies Condition: Implications for Possible Hiatus in Structural History in a Granulite Complex of the Eastern Ghats Belt, India
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Authors
Affiliations
1 Department of Geology, J K College, Purulia - 723 101, IN
1 Department of Geology, J K College, Purulia - 723 101, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 4 (2008), Pagination: 569-581Abstract
The granulite complex around Jenapore, Orissa bears the imprints of three deformations, of which first two (D1 and D2,) are strong events and related to pervasive deformational fabrics S1, and S2, respectively. Sector-wise structural analyses reveal that regional F1 folds, product of D1 deformation, are isoclinal, reclined, while the regional F2, folds, product of D2, deformation, are upright with overall gentle easterly plunges. Also, the polyclinal and non cylindrical nature of regional F2 prior to F3 folding is evident. This geometrical relation and certain key features such as (1) transposition/cross-cutting of early deformation fabric by later ones, (2) different modes of recrystallization during separate deformation episodes, (3) distinct deformational regime and response of materials related to deformation fabrics and (4) recrystallization of early fabric to a new one under granulite facies condition, definitely indicate a hiatus between D1 and D2 deformations.Keywords
Fold Geometry, Deformation Fabrics, Hiatus, Structural History, Eastern Ghats Granulite Belt.- Imprints of Early Deformation Structures, Fabric Development and Mineral Growth in the High Mg-Al Sapphirine Granulites, Eastern Ghats Granulite Belt, India
Abstract Views :181 |
PDF Views:2
Authors
Rajib Kar
1,
S. Bhattacharya
2
Affiliations
1 Department of Geology J K College, Puruha - 723 101, IN
2 Geological Studies Unit, Indian Statistical Institute 203 B T Road Kolkata 700035, IN
1 Department of Geology J K College, Puruha - 723 101, IN
2 Geological Studies Unit, Indian Statistical Institute 203 B T Road Kolkata 700035, IN