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dc.contributor.authorVan Kranendonk, M.
dc.contributor.authorKirkland, Chris
dc.date.accessioned2017-01-30T11:53:06Z
dc.date.available2017-01-30T11:53:06Z
dc.date.created2015-10-29T04:09:12Z
dc.date.issued2013
dc.identifier.citationVan Kranendonk, M. and Kirkland, C. 2013. Orogenic climax of Earth: The 1.2-1.1 Ga Grenvillian superevent. Geology. 41 (7): pp. 735-738.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/15973
dc.identifier.doi10.1130/G34243.1
dc.description.abstract

The rate of growth of the continental crust is controversial. We present an evaluation of time-constrained analyses of oxygen isotopes in zircon grains and incompatible element (Zr, Th) concentrations in magmatic rocks to test for variations in the degree of crustal recycling through geological time. The data indicate a rise in these geochemical proxies from ca. 3.0 Ga to a statistically significant peak at 1.2–1.1 Ga during the amalgamation of supercontinent Rodinia, and a decrease thereafter. When combined with other geological and geophysical observations, the data are interpreted as a consequence of an unprecedented level of crustal recycling and sediment subduction during Rodinia assembly, arising from a “Goldilocks” (i.e., just right) combination of larger, thicker plates on a warmer Earth with more rapid continental drift relative to modern Earth. The subsequent decrease in δ18O, Zr, and Th measurements is interpreted to reflect decreasing drift rates on a cooling Earth.

dc.titleOrogenic climax of Earth: The 1.2-1.1 Ga Grenvillian superevent
dc.typeJournal Article
dcterms.source.volume41
dcterms.source.number7
dcterms.source.startPage735
dcterms.source.endPage738
dcterms.source.issn0091-7613
dcterms.source.titleGeology
curtin.departmentDepartment of Applied Geology
curtin.accessStatusFulltext not available


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