Show simple item record

dc.contributor.authorLi, Z.
dc.contributor.authorMitchell, R.
dc.contributor.authorSpencer, Christopher
dc.contributor.authorErnst, R.
dc.contributor.authorPisarevskiy, Sergei
dc.contributor.authorKirscher, Uwe
dc.contributor.authorMurphy, J.
dc.date.accessioned2019-02-19T04:15:41Z
dc.date.available2019-02-19T04:15:41Z
dc.date.created2019-02-19T03:58:22Z
dc.date.issued2019
dc.identifier.citationLi, Z. and Mitchell, R. and Spencer, C. and Ernst, R. and Pisarevskiy, S. and Kirscher, U. and Murphy, J. 2019. Decoding Earth's rhythms: Modulation of supercontinent cycles by longer superocean episodes. Precambrian Research. 323: pp. 1-5.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/74063
dc.identifier.doi10.1016/j.precamres.2019.01.009
dc.description.abstract

© 2019 The supercontinent cycle of episodic assembly and breakup of almost all continents on Earth is commonly considered the longest period variation to affect mantle convection. However, global zircon Hf isotopic signatures and seawater Sr isotope ratios suggest the existence of a longer-term variation trend that is twice the duration of the supercontinent cycle. Here we propose that since ~2 billion years ago the superocean surrounding a supercontinent, as well as the circum-supercontinent subduction girdle, survive every second supercontinent cycle. This interpretation is in agreement with global palaeogeography and is supported by variations in passive margin, orogen, and mineral deposit records that each exhibits both ~500–700 million years periodic signal and a 1000–1500 million years variation trend. We suggest that the supercontinent cycle is modulated by an assembly that alternates between dominantly extroversion after a more complete breakup, and dominantly introversion after an incomplete breakup of the previous supercontinent.

dc.publisherElsevier BV
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/FL150100133
dc.titleDecoding Earth's rhythms: Modulation of supercontinent cycles by longer superocean episodes
dc.typeJournal Article
dcterms.source.volume323
dcterms.source.startPage1
dcterms.source.endPage5
dcterms.source.issn0301-9268
dcterms.source.titlePrecambrian Research
curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.accessStatusFulltext not available


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record