Abstract:
Igneous dykes and sills were collected from Dronning Maud Land during the field season 2000-2001. The aim was to measure ages of volcanism during flood basalt events in Dronning Maud Land associated with the breakup of Gondwana.
The style and volume of magmatism varies between margins from large volume flood basalts such as the Parana or Deccan provinces to less volumetric margins such as the southern part of the South Atlantic. This CASE (Collaborative Awards in Science and Engineering) studentship was intended to provide support to study the evolution of the break-up of Africa and East Antarctica which occurred in the early Jurassic. An extended period of magmatism has been suggested for this margin associated with complex extensional tectonics. A combined geochronological / geochemical approach was used to understand the evolution of the crust and sub-continental lithospheric mantle during the break-up of one central portion of the Gondwana super continent.
Keywords:
Ar-Ar isotopic dating, Gondwana, Jurassic, basalt, continental break-up, crust, dyke, lithospheric mantle, magmatism, sill
| Access Constraints: | Requests for data can be made via the UK Polar Data Centre (UK PDC) at BAS. |
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| Use Constraints: | Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ |
| Creation Date: | 2007-06-08 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
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| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Adela Fazel |
| Role(s) | Investigator |
| Name | Prof Simon P Kelley |
| Role(s) | Investigator |
| Name | Dr Philip Leat |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | Fazel, A. 2006. Dykes as Tracers of Continental Break-up Argon Geochronology of Mesozoic Volcanic Rocks of Western Dronning Maud Land, Antarctica Supervisors: Simon Kelley (Open University), Phil Leat (British Antarctic Survey), Chris Hawkesworth (University of Bristol) Riley TR, Leat PT, Curtis ML, Millar IL, Duncan RA and Fazel A. 2005. Early-middle jurassic dolerite dykes from western Dronning Maud Land (Antarctica): Identifying mantle sources in the Karoo large igneous province. Journal of Petrology. 46 (7), 1489-1524 Kelley, S., Fazel, A., Leat P. and Hawkesworth, C. 2003. Repeated Dyke Intrusions in Dronning Maud Land over 1000 Ma: Similarities and Differences through Time. Antarctic Funding Initiative, Second Workshop, New Hall, Cambridge, 2-3 October 2003 Fazel, A, S.P. Kelley, P.T. Leat and C Hawkesworth. 2003. Dykes as Tracers of Continental Break-up: Argon Geochronology of Mesozoic Flood Basalts of Western Dronning Maud Land, Antarctica. European Geophysical Society 2003. Geophysical Research Abstracts, Vol. 5, 00047 Fazel, A, S.P. Kelley, P.T. Leat and C Hawkesworth. 2003. Dykes as Tracers of Continental Break-up: Argon Geochronology of Mesozoic Flood Basalts of Western Dronning Maud Land, Antarctica. EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #47, 2003EAEJA.47F Kelley, S., Fazel, A., Leat, P. and Hawkesworth, C. 2002. Dykes as Tracers of Continental Break-Up: Argon Geochronology of Mesozoic Volcanic Rocks of Dronning Maud Land, Antarctica. Antarctic Funding Initiative, First Workshop, New Hall, Cambridge, 24 Sep 2002 |
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| Lineage: | ||
| Project: |
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| Temporal Coverage: | |
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| Start Date | 2000-09-01 |
| End Date | 2006-12-01 |
| Paleo Temporal Coverage: | |
| Paleo Start Date | N/A |
| Paleo End Date | N/A |
| Chronostratigraphic Unit | JURASSIC |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -74 |
| Northernmost | -72 |
| Longitude | |
| Westernmost | -5.5 |
| Easternmost | 1 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Dronning Maud Land |
| Location | Antarctica |
| Detailed Location | Ahlmannrygen |
| Location | Antarctica |
| Detailed Location | Kirwanveggen |
| Location | Antarctica |
| Detailed Location | Straumsvola |
| Location | Antarctica |
| Detailed Location | Sverdrupfjella |
| Data Storage: | Samples are managed by the British Antarctic Survey (BAS), Geological Data Manager and held in the rock store.There are approximately 250kg of rocks, reference numbers Z1851-Z1875. The data analysis associated with this dataset is also managed by the Geological Data Manager please see the related dataset http://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/00251 for more information. This data was collected in conjuction with members of the MAMOG (Magmatism as a monitor of Gondwana break-up processes) party. The data for MAMOG is also managed by the Geological Data Manager and held in the rock store. The rocks have the reference numbers Z1658-Z1681, Z1751-Z1795 and Z1801-Z1839. |
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