The breakup of Rodinia: did it start with a mantle plume beneath South China?

Details The breakup of Rodinia: did it start with a mantle plume beneath South China? The breakup of Rodinia: did it start with a mantle plume beneath South China?

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999e%26psl.173..171l&link_type=abstract

Earth and Planetary Science Letters, Volume 173, Issue 3, p. 171-181.

Computer Science

42

Scientific paper

Mafic to ultramafic dykes and sills in South China, dated as /828+/-7 Ma old, are identical in age to the /827+/-6 Ma Gairdner Dyke Swarm in Australia, thought to be of mantle plume origin. These intrusive rocks, accompanied by widespread granite intrusions and rapid unroofing at a lateral extent of ca. 1000 km, and followed by continental rifting, are interpreted to indicate the arrival of a plume head centred beneath South China. This interpretation supports the idea that South China lay between Australia and Laurentia in the Rodinia supercontinent, and suggests that Rodinia breakup may have started with a mantle plume which initiated continental rifting at about 820 Ma ago.

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