Unravelling the complexities in high-grade rocks using multiple techniques : the Achankovil Zone of southern India
The Achankovil Zone of southern India forms a distinct isotopic and structural boundary separating the Madurai Block to the north from the Trivandrum Block to the south. We combine isotopic and trace element geochemistry of major and accessory phases with phase equilibria modelling to provide quanti...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Springer
2015
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| Online Access: | http://purl.org/au-research/grants/arc/FT120100340 http://hdl.handle.net/20.500.11937/7639 |
| _version_ | 1848745427782860800 |
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| author | Taylor, Richard Clark, Christopher Johnson, Tim Santosh, M. Collins, A. |
| author_facet | Taylor, Richard Clark, Christopher Johnson, Tim Santosh, M. Collins, A. |
| author_sort | Taylor, Richard |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The Achankovil Zone of southern India forms a distinct isotopic and structural boundary separating the Madurai Block to the north from the Trivandrum Block to the south. We combine isotopic and trace element geochemistry of major and accessory phases with phase equilibria modelling to provide quantitative constraints on the timing and conditions of peak metamorphism and the nature of the protoliths within the Achankovil Zone. The results suggest a clockwise pressure–temperature path with peak metamorphic temperatures of up to 950 °C at pressures of around 0.7 GPa followed by high temperature decompression. The metamorphic peak occurred at 545–512 Ma. U–Pb and Hf isotopic analysis of detrital zircon shows the rocks have a strong affinity with the southern part of the Madurai Block. The Achankovil Zone is interpreted as the reworked southern margin of the Madurai Block, which was metamorphosed during the final stages of the assembly of Gondwana. |
| first_indexed | 2025-11-14T06:17:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-7639 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:17:11Z |
| publishDate | 2015 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-76392018-03-29T09:05:39Z Unravelling the complexities in high-grade rocks using multiple techniques : the Achankovil Zone of southern India Taylor, Richard Clark, Christopher Johnson, Tim Santosh, M. Collins, A. Zircon geochronology Phase equilibria modelling Achankovil Zone Gondwana Metamorphism The Achankovil Zone of southern India forms a distinct isotopic and structural boundary separating the Madurai Block to the north from the Trivandrum Block to the south. We combine isotopic and trace element geochemistry of major and accessory phases with phase equilibria modelling to provide quantitative constraints on the timing and conditions of peak metamorphism and the nature of the protoliths within the Achankovil Zone. The results suggest a clockwise pressure–temperature path with peak metamorphic temperatures of up to 950 °C at pressures of around 0.7 GPa followed by high temperature decompression. The metamorphic peak occurred at 545–512 Ma. U–Pb and Hf isotopic analysis of detrital zircon shows the rocks have a strong affinity with the southern part of the Madurai Block. The Achankovil Zone is interpreted as the reworked southern margin of the Madurai Block, which was metamorphosed during the final stages of the assembly of Gondwana. 2015 Journal Article http://hdl.handle.net/20.500.11937/7639 10.1007/s00410-015-1147-2 http://purl.org/au-research/grants/arc/FT120100340 Springer restricted |
| spellingShingle | Zircon geochronology Phase equilibria modelling Achankovil Zone Gondwana Metamorphism Taylor, Richard Clark, Christopher Johnson, Tim Santosh, M. Collins, A. Unravelling the complexities in high-grade rocks using multiple techniques : the Achankovil Zone of southern India |
| title | Unravelling the complexities in high-grade rocks using multiple techniques : the Achankovil Zone of southern India |
| title_full | Unravelling the complexities in high-grade rocks using multiple techniques : the Achankovil Zone of southern India |
| title_fullStr | Unravelling the complexities in high-grade rocks using multiple techniques : the Achankovil Zone of southern India |
| title_full_unstemmed | Unravelling the complexities in high-grade rocks using multiple techniques : the Achankovil Zone of southern India |
| title_short | Unravelling the complexities in high-grade rocks using multiple techniques : the Achankovil Zone of southern India |
| title_sort | unravelling the complexities in high-grade rocks using multiple techniques : the achankovil zone of southern india |
| topic | Zircon geochronology Phase equilibria modelling Achankovil Zone Gondwana Metamorphism |
| url | http://purl.org/au-research/grants/arc/FT120100340 http://hdl.handle.net/20.500.11937/7639 |