Sclavia Craton

TheSclavia Cratonis a lateArcheansupercratonthought to be parental to theSlaveandWyoming CratonsinNorth America,theDharwar Cratonin southern India, and theZimbabwe Cratoninsouthern Africa.Sclavia was proposed byBleeker 2003who estimated the number of Archean cratons to be about 35; cratonic fragments which he suggested were derived from a single or a few supercratons.

The break-up of Sclavia, and possibly other continents or supercratons, can be linked to a global pulse ofmagmaticactivity around 2.33–2.1Gyaprobably caused by increasedmantle plumeactivity. Related results of this mantle activity include the 2.3Ga-oldPrecambriandyke swarmsin theDharwar Cratonin southern India which were emplaced in only five million years. Similar swarms have been found in what is today Antarctica, Australia, Finland, Greenland, and North America.

There is growing evidences that support that the Slave and Dharwar cratons shared a common history through the Archean but the exact configuration of the Archean supercraton from which they were derived is unknown.

Kenorland,a proposed supercontinent, is a "one-piece" alternative to three separate supercratons:Superia,Vaalbara,and Sclavia.

References

Notes

Sources

• Bleeker, W. (2003). "The Late Archaean Record, a Puzzle in ca. 35 Pieces".Lithos.71(2): 99–134.Bibcode:2003Litho..71...99B.doi:10.1016/j.lithos.2003.07.003.
• Ernst, R. E. (2007).Global record of large igneous provinces [LIPs] and its use in paleocontinental reconstructions.GSA Denver Annual Meeting.Retrieved14 May2016.
• French, J. E.; Heaman, L. M. (2010)."Precise U–Pb dating of Paleoproterozoic mafic dyke swarms of the Dharwar craton, India: implications for the existence of the Neoarchean supercraton Sclavia".Precambrian Research.183(3): 416–441.Bibcode:2010PreR..183..416F.doi:10.1016/j.precamres.2010.05.003.Retrieved14 May2016.
• Lubnina, N.; Slabunov, A. (2011).Neoarchean supercontinent Kenorland: paleomagnetic and geologic evidence(PDF).Geophysical Research Abstracts. Vol. 13.Retrieved14 May2016.