Increased loss of continental crust during supercontinent amalgamation

Roberts, Nick M.W.

doi:10.1016/j.gr.2011.08.001

Cited by 98 publications

(67 citation statements)

References 59 publications

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“…In Figure 10a we plot the median trend through the data. Compared with that of the database used by Roberts (2012), our trend, based on a much larger database, seems to show less fluctuation overall, and in general, there is some filling of gaps in the overall fan of 1Hf data in this type of plot. It could be argued in this case that continued addition of new data will eventually fill in more gaps, and that patterns such as varying 1Hf and episodic growth may be smoothed out.…”

Section: Global Isotopic Trendscontrasting

confidence: 52%

“…Belousova et al 2010;Condie et al 2011;Iizuka et al 2010), features that remain in this large database, include a positive 1Hf trend after Columbia formation at 1.7 Ga, and up to Rodinia formation at 1.3 Ga. This was noted by Roberts (2012), and ascribed by Roberts (2013) to continuous continental growth on the margin of the Columbia supercontinental 'lid'. Another significant feature is the large negative 1Hf trend at 550 Ma that correlates with Gondwana formation and reworking of much older crust (see section on 'Regional isotopic trends'; Spencer et al 2013b).…”

Section: Global Isotopic Trendsmentioning

confidence: 79%

“…It is the mass balance between crustal destruction and crustal reworking that will help better constrain crustal growth models. The findings of Roberts (2012) indicate that relative crustal growth rate can be correlated with the supercontinent cycle, with periods of supercontinent breakup featuring increased continental growth, and periods of supercontinent amalgamation featuring decreased growth. Such a balance of the destruction and growth of continental crust through time was conceptualized by Stern & Scholl (2010), and termed the Yin and Yang of the Earth's crust.…”

Section: Global Isotopic Trendsmentioning

confidence: 96%

“…If a representative dataset is used, then these trends may reflect global balances in magmatism. Roberts (2012) used the same assumptions as those in the previously discussed regional examples to investigate the balance of crustal growth and recycling through time. An additional assumption important to this particular study is that deviations to evolved Hf signatures not only reflect greater crustal recycling, but will also indicate periods of crustal destruction, that is, loss to the mantle.…”

Section: Global Isotopic Trendsmentioning

confidence: 99%

“…The overall validity of this assumption has not been tested in terms of overall volumes or the consistency across different geodynamic settings. For example, in subduction settings, when arc magmatism is reworking pre-existing crust through crustal contamination and crustal melting, sediment subduction and subduction erosion (and possibly crustal delamination) will also lead to crustal destruction (Roberts 2012). In continent-continent collision settings, crustal destruction will occur through lower crustal delamination.…”

Section: Global Isotopic Trendsmentioning

confidence: 99%

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The zircon archive of continent formation through time

Roberts¹,

Spencer²

2014

194

136

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The strong resilience of the mineral zircon and its ability to host a wealth of isotopic information make it the best deep-time archive of Earth's continental crust. Zircon is found in most felsic igneous rocks, can be precisely dated and can fingerprint magmatic sources; thus, it has been widely used to document the formation and evolution of continental crust, from pluton-to global-scale. Here, we present a review of major contributions that zircon studies have made in terms of understanding key questions involving the formation of the continents. These include the conditions of continent formation on early Earth, the onset of plate tectonics and subduction, the rate of crustal growth through time and the governing balance of continental addition v. continental loss, and the role of preservation bias in the zircon record.

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Section: Global Isotopic Trendscontrasting

confidence: 52%

Section: Global Isotopic Trendsmentioning

confidence: 79%

Section: Global Isotopic Trendsmentioning

confidence: 96%

Section: Global Isotopic Trendsmentioning

confidence: 99%

Section: Global Isotopic Trendsmentioning

confidence: 99%

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The zircon archive of continent formation through time

Roberts¹,

Spencer²

2014

194

136

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Statistical cyclicity of the supercontinent cycle

Rolf

Coltice

Tackley

2014

Geophys. Res. Lett.

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Palaeo‐Mesoproterozoic magmatic and metamorphic events from the Kuluketage block, northeast Tarim Craton: geochronology, geochemistry and implications for evolution of Columbia

Wang

Cao

et al. 2017

Geological Journal

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Banded iron formations (BIFs), granites and diabases are extensively distributed in the Kuluketage block of the northeast Tarim Craton. Here we report laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) zircon U-Pb ages and whole-rock elemental data for these rocks. The detrital zircons from the BIFs show a peak age of 2.0-1.8 Ga with a weighted mean age of 1945 ± 10 Ma (MSWD = 0.77), and the zircons from the granite give an upper intercept age of 1974 ± 27 Ma (MSWD = 1.05). The trace element features suggest that the Asitingbulake granite, which belongs to the I-type granite, may originate from the re-melting of continental crust in a~1.95 Ga collisional orogenic setting. Recently, the 2.0-1.8 Ga continuous magmatic and metamorphic events which are contemporaneous with the global orogenic event have been reported in the Kuluketage block and other massifs around the Tarim Craton (e.g. Central Tianshan, Dunhuang, Quanji, Altyn Tagh, West Kunlun). Based on the previous geochronological data, two 2.0-1.8 Ga orogens associated with the assembly of the Columbia supercontinent can be identified along the north and south margins of Tarim Craton: (1) the north Tarim Orogen, Central Tianshan-Kuluketage-Dunhuang orogenic belt and (2) the south Tarim Orogen, West Kunlun-Altyn Tagh-Aketashtage-Quanji orogenic belt. Additionally, this paper reports a new zircon U-Pb age of 1497 ± 21 Ma (MSWD = 0.96) from the Baowenbulake diabase dykes where the trace element features suggest that the parental magma of Baowenbulake diabases is derived from the mantle in an intra-plate rifting or extensional setting. The~1.5 Ga diabases from northwest Tarim corresponded to a major episode of mafic magmatism during the early Mesoproterozoic period identified in other crustal fragments of Laurentia, Siberia, Greater Congo, South China and North China Craton and probably belong to one of the three major large igneous provinces associated with the breakup of the Mesoproterozoic Columbia supercontinent. The data from this paper provide important constraints on the configuration of the Tarim Craton during the assembly and breakup of the Columbia supercontinent.

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Increased loss of continental crust during supercontinent amalgamation

Cited by 98 publications

References 59 publications

The zircon archive of continent formation through time

The zircon archive of continent formation through time

Statistical cyclicity of the supercontinent cycle

Palaeo‐Mesoproterozoic magmatic and metamorphic events from the Kuluketage block, northeast Tarim Craton: geochronology, geochemistry and implications for evolution of Columbia

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