Rotation of the Falklands microplate reassessed after recognition of discrete Jurassic and Cretaceous dyke swarms

Petroleum Geoscience

Volumn 15, Issue 3, 2009, Pages 279-287

  Stone, P ^a   Kimbell, G S ^a   Richards, P C ^a  

^a BRITISH GEOLOGICAL SURVEY   (United Kingdom)

Author keywords

Dykes; Falkland Islands; Gondwana break up; Magnetic modelling; South Atlantic

Indexed keywords

DYKES; FALKLAND ISLANDS; GONDWANA BREAK-UP; MAGNETIC MODELLING; SOUTH ATLANTIC;

OCEANOGRAPHY; ROTATION;

TECTONICS;

AEROMAGNETIC SURVEY; CONTINENTAL BREAKUP; CRETACEOUS; DIKE SWARM; GONDWANA; JURASSIC; MAGNETIC ANOMALY; MICROPLATE; NUMERICAL MODEL; PLATE MOTION; PLATE TECTONICS; TECTONIC ROTATION;

ATLANTIC ISLANDS; ATLANTIC OCEAN; ATLANTIC OCEAN (SOUTH); FALKLAND ISLANDS (MALVINAS);

EID: 70149083474     PISSN: 13540793     EISSN: None     Source Type: Journal    
DOI: 10.1144/1354-079309-847     Document Type: Article

References (33)

1. Adie, R.J. 1952. The position of the Falkland Islands in a reconstruction of Gondwanaland. Geological Magazine, 89, 401-410.
2. Aldiss, D.T. & Edwards, E.J. 1999. The Geology of the Falkland Islands. British Geological Survey Technical Report, WC/99/10.
3. Andersson, J.G. 1907. Contributions to the geology of the Falkland Islands. Wissenschaftliche Ergebnisse der Schwedischen Sudpolar-expedition 1901-1903, 3 (Lief. 2).
4. Baker, H.A. 1924. Final Report on Geological Investigations in the Falkland Islands, 1920-1922. Government Printer, Stanley.
5. Barker, P.F. 1999. Evidence for a volcanic rifted margin and oceanic crustal structure for the Falkland Plateau Basin. Journal of the Geological Society, London, 156, 889-900.
6. Besse, J. & Courtillot, V. 2002. Apparent and true polar wander and the geometry of the geomagnetic field over the last 200 Myr. Journal of Geophysical Research, 107(B11), 2300, DOI: 10.1029/2000JB000050.
7. Cingolani, C.A. & Varela, R. 1976. Investigaciones geologicas y geochrono- logicas en el extremo sur de la isla Gran Malvina, sector do Cabo Belgrano (Cabo Meredith), Islas Malvinas. In: Actas del sexto congreso Geologico Argentino, Buenos Aires, 457-473.
8. Curtis, M.L. & Hyam, D.M. 1998. Late Palaeozoic to Mesozoic structural evolution of the Falkland Islands: a displaced segment of the Cape Fold Belt. Journal of the Geological Society, London, 155, 115-129.
9. Darwin, C. 1846. On the geology of the Falkland Islands. Quarterly Journal of the Geological Society, London, 2, 267-274.
10. Duncan, R.A., Hooper, P.R., Rehacek, J., Marsh, J.S. & Duncan, A.R. 1997. The timing and duration of the Karoo igneous event, southern Gondwana. Journal of Geophysical Research, 102, 18 127-18 138.
11. Du Toit, A.L. 1937. Our Wandering Continents. Oliver & Boyd, Edinburgh.
12. Greenway, M.E. 1972. The geology of the Falkland Islands. British Antarctic Survey Scientific Reports, 76.
13. Halle, T.G. 1911. On the geological structure and history of the Falkland Islands. Bulletin of the Geological Institution of the University of Uppsala, 11, 115-229.
14. Hodgkinson, R. 2002. Structural studies in the Falkland Islands, South Atlantic. PhD thesis, University of Birmingham.
15. Hunter, M.A. & Lomas, S.A. 2003. Reconstructing the Siluro-Devonian coastline of Gondwana: insights from the sedimentology of the Port Stephens Formation, Falkland Islands. Journal of the Geological Society, London, 160,459-476.
16. Hyam, D.M., Marshall, J.A.E., Bull, J.M. & Sanderson, D.J. 2000. The structural boundary between East and West Falkland: new evidence for movement history and lateral extent. Marine and Petroleum Geology, 17, 13-26.
17. Jacobs, J., Thomas, R.J., Armstrong, R.A. & Henjes-Kunst, F. 1999. Age and thermal evolution of the Mesoproterozoic Cape Meredith Complex, West Falkland. Journal of the Geological Society, London, 156, 917-928.
18. 39Ar age data. Geology, 33,745-748.
19. Marshall, J.E.A. 1994. The Falkland Islands: a key element in Gondwana palaeogeography. Tectonics, 13, 499-514.
20. Mitchell, C., Taylor, G.K., Cox, K.G. & Shaw, J. 1986. Are the Falkland Islands a rotated microplate? Nature, 319, 131-134.
21. Mitchell, C., Ellam, R.M. & Cox, K.G. 1999. Mesozoic dolerite dykes of the Falkland Islands: petrology, petrogenesis and implications for geochemical provinciality in Gondwanaland low-Ti basaltic rocks. Journal of the Geological Society, London, 156, 901-916.
22. 39Ar ages for dykes from the Falkland Islands with implications for the break up of southern Gondwanaland. Journal of the Geological Society, London, 151, 79-81.
23. Pedley, R.C., Busby, J.P. & Dabek, Z.K. 1993. GRAVMAG user manual - interactive 2.5D gravity and magnetic modelling. British Geological Survey Technical Report WK/93/26/R.
24. Richards, P.C., Gatliff, R.W., Quinn, M.F., Williamson, J.P. & Fannin, N.G.T. 1996. The geological evolution of the Falkland Islands continental shelf. In: Storey, B.C., King, E.C. & Livermore, R.A. (eds) Weddell Sea Tectonics and Gondwana Break-up. Geological Society, London, Special Publications, 108, 105-128.
25. Riley, T.R., Leat, P.T., Curtis, M.L., Millar, I.L., Duncan, R.A. & 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, 1489-1524.
26. Stone, P., Richards, P.C., Kimbell, G.S., Esser, R.P. & Reeves, D. 2008. Cretaceous dykes discovered in the Falkland Islands: implications for regional tectonics. Journal of the Geological Society, London, 165, 1-4.
27. Storey, B.C., Curtis, M.L., Ferris, J.K., Hunter, M.A. & Livermore, R.A. 1999. Reconstruction and break-out model for the Falkland Islands within Gondwana. Journal of African Earth Sciences, 29, 153-163.
28. Taylor, G.K. & Shaw, J. 1989. The Falkland Islands: New palaeomagnetic data and their origin as a displaced terrane from southern Africa. In: Hillhouse, J.W. (ed.) Deep Structure and Past Kinematics of Accreted Terranes. Geophysical Monographs, 50, 59-72.
29. Thistlewood, L., Leat, P.T., Millar, I.L., Storey, B.C. & Vaughan, A.P.M. 1997. Basement geology and Palaeozoic-Mesozoic mafic dykes from the Cape Meredith Complex, Falkland Islands: a record of repeated intracontinental extension. Geological Magazine, 134, 355-367.
30. Thomas, R.J., Jacobs, J. & Weber, K. 1997. Geology of the Mesoproterozoic Cape Meredith Complex, West Falkland. In: Ricci, C.A. (ed.) The Antarctic Region: Geological Evolution and Processes. Terra Antarctica Publication, Siena, 21-30.
31. Thomson, K. 1998. When did the Falklands rotate? Marine and Petroleum Geology, 15, 723-736.
32. Thomson, K., Hegarty, K.A., Marshallsea, S.J. & Green, P.F. 2002. Thermal and tectonic evolution of the Falkland Islands: implications for hydrocarbon exploration in the adjacent offshore region. Marine and Petroleum Geology, 19, 95-116.
33. Trewin, N.H., Macdonald, D.I.M. & Thomas, C.G.C. 2002. Stratigraphy and sedimentology of the Permian of the Falkland Islands: lithostratigraphic and palaeoenvironmental links with South Africa. Journal of the Geological Society, London, 159, 5-19.