Hot orogens and supercontinent amalgamation: A Gondwanan example from southern India
The Southern Granulite Terrane in southern India preserves evidence for regional-scale high to ultrahigh temperature metamorphism related to the amalgamation of the supercontinent Gondwana. Here we present accessory mineral (zircon and monazite) geochronological and geochemical datasets linked to th...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier BV
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/14947 |
| _version_ | 1848748759457988608 |
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| author | Clark, Christopher Healy, D. Johnson, Tim Collins, A. Taylor, Richard Santosh, M. Timms, Nicholas Eric |
| author_facet | Clark, Christopher Healy, D. Johnson, Tim Collins, A. Taylor, Richard Santosh, M. Timms, Nicholas Eric |
| author_sort | Clark, Christopher |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The Southern Granulite Terrane in southern India preserves evidence for regional-scale high to ultrahigh temperature metamorphism related to the amalgamation of the supercontinent Gondwana. Here we present accessory mineral (zircon and monazite) geochronological and geochemical datasets linked to the petrological evolution of the rocks as determined by phase equilibria modelling. The results constrain the duration of high to ultrahigh temperature (> 900 °C) metamorphism in the Madurai Block to be c. 40 Ma with peak conditions achieved c. 60 Ma after the formation of an orogenic plateau related to the collision of the microcontinent Azania with East Africa at c. 610 Ma. A 1D numerical model demonstrates that the attainment of temperatures > 900 °C requires that the crust be moderately enriched in heat producing elements and that the duration of the orogenic event is sufficiently long to allow conductive heating through radioactive decay. Both of these conditions are met by the available data for the Madurai Block. Our results constrain the length of time it takes for the crust to evolve from collision to peak P–T (i.e. the prograde heating phase) then back to the solidus during retrogression. This evolution illustrates that not all metamorphic ages date sutures. |
| first_indexed | 2025-11-14T07:10:09Z |
| format | Journal Article |
| id | curtin-20.500.11937-14947 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:10:09Z |
| publishDate | 2015 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-149472017-09-13T15:02:14Z Hot orogens and supercontinent amalgamation: A Gondwanan example from southern India Clark, Christopher Healy, D. Johnson, Tim Collins, A. Taylor, Richard Santosh, M. Timms, Nicholas Eric Gondwana supercontinent Phase equilibria modelling High temperature metamorphism Southern India U–Pb geochronology The Southern Granulite Terrane in southern India preserves evidence for regional-scale high to ultrahigh temperature metamorphism related to the amalgamation of the supercontinent Gondwana. Here we present accessory mineral (zircon and monazite) geochronological and geochemical datasets linked to the petrological evolution of the rocks as determined by phase equilibria modelling. The results constrain the duration of high to ultrahigh temperature (> 900 °C) metamorphism in the Madurai Block to be c. 40 Ma with peak conditions achieved c. 60 Ma after the formation of an orogenic plateau related to the collision of the microcontinent Azania with East Africa at c. 610 Ma. A 1D numerical model demonstrates that the attainment of temperatures > 900 °C requires that the crust be moderately enriched in heat producing elements and that the duration of the orogenic event is sufficiently long to allow conductive heating through radioactive decay. Both of these conditions are met by the available data for the Madurai Block. Our results constrain the length of time it takes for the crust to evolve from collision to peak P–T (i.e. the prograde heating phase) then back to the solidus during retrogression. This evolution illustrates that not all metamorphic ages date sutures. 2015 Journal Article http://hdl.handle.net/20.500.11937/14947 10.1016/j.gr.2014.11.005 Elsevier BV fulltext |
| spellingShingle | Gondwana supercontinent Phase equilibria modelling High temperature metamorphism Southern India U–Pb geochronology Clark, Christopher Healy, D. Johnson, Tim Collins, A. Taylor, Richard Santosh, M. Timms, Nicholas Eric Hot orogens and supercontinent amalgamation: A Gondwanan example from southern India |
| title | Hot orogens and supercontinent amalgamation: A Gondwanan example from southern India |
| title_full | Hot orogens and supercontinent amalgamation: A Gondwanan example from southern India |
| title_fullStr | Hot orogens and supercontinent amalgamation: A Gondwanan example from southern India |
| title_full_unstemmed | Hot orogens and supercontinent amalgamation: A Gondwanan example from southern India |
| title_short | Hot orogens and supercontinent amalgamation: A Gondwanan example from southern India |
| title_sort | hot orogens and supercontinent amalgamation: a gondwanan example from southern india |
| topic | Gondwana supercontinent Phase equilibria modelling High temperature metamorphism Southern India U–Pb geochronology |
| url | http://hdl.handle.net/20.500.11937/14947 |