Monazite EMP age constraints on deformation along ductile shear zones in the Delhi Fold Belt: implications on Neoproterozoic tectonic evolution of NW India
The in-situ “chemical” Th–U–Pb dating of monazite with the electron microprobe is used to unravel the Neoproterozoic tectono-thermal history of the “Erinpura Granite” terrane in the foreland of the Delhi Fold Belt (DFB) in the NW Indian craton. These granitoids are variably deformed and show effects...
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| Format: | Journal Article |
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Elsevier Science BV
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/21648 |
| _version_ | 1848750648574607360 |
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| author | Just, J. Shulz, B. de Wall, H. Jourdan, Fred Pandit, M. |
| author_facet | Just, J. Shulz, B. de Wall, H. Jourdan, Fred Pandit, M. |
| author_sort | Just, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The in-situ “chemical” Th–U–Pb dating of monazite with the electron microprobe is used to unravel the Neoproterozoic tectono-thermal history of the “Erinpura Granite” terrane in the foreland of the Delhi Fold Belt (DFB) in the NW Indian craton. These granitoids are variably deformed and show effects of shearing activity. Monazites from the Erinpura granitoids recorded two main events; (1) protolith crystallization at 863 ± 23 Ma and (2) recrystallization and formation of new Th-poor monazite at 775 ± 26 Ma during shear overprint. Some components of the Erinpura granitoids, such as the Siyawa Granite and granites exposed near Sirohi town, show evidence of migmatization. This migmatization event is documented by anatexis and associated monazite crystallization at 779 ± 16 Ma. The age data indicate an overlap in timing between anatectic event and ductile shear deformation. The end of the tectono-thermal event in the Sirohi area is constrained by a 736 ± 6 Ma Ar–Ar muscovite age data from the ductile shear zone. |
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| format | Journal Article |
| id | curtin-20.500.11937-21648 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:40:10Z |
| publishDate | 2011 |
| publisher | Elsevier Science BV |
| recordtype | eprints |
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| spelling | curtin-20.500.11937-216482019-02-19T05:35:00Z Monazite EMP age constraints on deformation along ductile shear zones in the Delhi Fold Belt: implications on Neoproterozoic tectonic evolution of NW India Just, J. Shulz, B. de Wall, H. Jourdan, Fred Pandit, M. Shear zone CHIME/EPMA monazite dating Ar-Ar muscovite age NW India Erinpura granite The in-situ “chemical” Th–U–Pb dating of monazite with the electron microprobe is used to unravel the Neoproterozoic tectono-thermal history of the “Erinpura Granite” terrane in the foreland of the Delhi Fold Belt (DFB) in the NW Indian craton. These granitoids are variably deformed and show effects of shearing activity. Monazites from the Erinpura granitoids recorded two main events; (1) protolith crystallization at 863 ± 23 Ma and (2) recrystallization and formation of new Th-poor monazite at 775 ± 26 Ma during shear overprint. Some components of the Erinpura granitoids, such as the Siyawa Granite and granites exposed near Sirohi town, show evidence of migmatization. This migmatization event is documented by anatexis and associated monazite crystallization at 779 ± 16 Ma. The age data indicate an overlap in timing between anatectic event and ductile shear deformation. The end of the tectono-thermal event in the Sirohi area is constrained by a 736 ± 6 Ma Ar–Ar muscovite age data from the ductile shear zone. 2011 Journal Article http://hdl.handle.net/20.500.11937/21648 10.1016/j.gr.2010.08.002 Elsevier Science BV fulltext |
| spellingShingle | Shear zone CHIME/EPMA monazite dating Ar-Ar muscovite age NW India Erinpura granite Just, J. Shulz, B. de Wall, H. Jourdan, Fred Pandit, M. Monazite EMP age constraints on deformation along ductile shear zones in the Delhi Fold Belt: implications on Neoproterozoic tectonic evolution of NW India |
| title | Monazite EMP age constraints on deformation along ductile shear zones in the Delhi Fold Belt: implications on Neoproterozoic tectonic evolution of NW India |
| title_full | Monazite EMP age constraints on deformation along ductile shear zones in the Delhi Fold Belt: implications on Neoproterozoic tectonic evolution of NW India |
| title_fullStr | Monazite EMP age constraints on deformation along ductile shear zones in the Delhi Fold Belt: implications on Neoproterozoic tectonic evolution of NW India |
| title_full_unstemmed | Monazite EMP age constraints on deformation along ductile shear zones in the Delhi Fold Belt: implications on Neoproterozoic tectonic evolution of NW India |
| title_short | Monazite EMP age constraints on deformation along ductile shear zones in the Delhi Fold Belt: implications on Neoproterozoic tectonic evolution of NW India |
| title_sort | monazite emp age constraints on deformation along ductile shear zones in the delhi fold belt: implications on neoproterozoic tectonic evolution of nw india |
| topic | Shear zone CHIME/EPMA monazite dating Ar-Ar muscovite age NW India Erinpura granite |
| url | http://hdl.handle.net/20.500.11937/21648 |