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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >The breakup of Rodinia: did it start with a mantle plume beneath South China?
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The breakup of Rodinia: did it start with a mantle plume beneath South China?

机译：Rodinia的解体：它是从华南之下的地幔柱开始的吗？

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摘要

Mafic to ultramafic dykes and sills in South China, dated as 828 +- 7 Ma old, are identical in age to 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.
机译：华南地区的镁铁质岩浆岩和超镁铁质岩岩和基岩的年龄为828±7 Ma，与澳大利亚的827±6 Ma Gairdner Dyke Swarm年龄相同，被认为是地幔柱的起源。这些侵入性岩石，伴随着广泛的花岗岩侵入，并在ca的横向范围内迅速展开。 1000公里，然后是大陆裂谷，被解释为指示以华南为中心的羽状喷头的到来。这种解释支持了华南地区位于罗丹尼亚州超大陆之间的澳大利亚和劳伦西亚之间的想法，并暗示了罗丹尼亚州的分裂可能始于地幔柱，并在大约820 Ma之前引发了大陆裂谷。

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