Hadean crustal evolution revisited: New constraints from Pb–Hf isotope systematics of the Jack Hills zircons

Kemp, Anthony I.S.; Wilde, Simon A.; Hawkesworth, Chris J.; Coath, C. D.; Nemchin, A. A.; Pidgeon, R. T.; Vervoort, J. D.; DuFrane, S. Andrew

doi:10.1016/j.epsl.2010.04.043

Cited by 431 publications

(264 citation statements)

References 64 publications

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“…As is evident from this plot, much of Earth history has been sampled in this dataset; however, to highlight the potential bias that still exists in the Hadean to Eoarchaean, zircons from Jack Hills are highlighted separately (Amelin et al 1999;Harrison et al 2005Harrison et al , 2008Blichert-Toft & Albarède 2008;Kemp et al 2010). These zircons are from a geographically restricted area and dominate the record for the early Earth.…”

mentioning

confidence: 99%

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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mentioning

confidence: 99%

The zircon archive of continent formation through time

Roberts¹,

Spencer²

2014

194

136

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“…Hf isotope analysis gave highly positive ε Hf (t) values of +2.4, consistent with the value of homochronous depleted mantle within the uncertainty ( Figure 5). Hf value of 0.022 [23] for the average lower continental crust on the basis of Kemp et al's inference that composition of Hadean crust was mafic and similar to that of the lower continental crust [4]. The good agreement between zircon U-Pb and Hf model ages clearly points out the growth and immediate reworking of juvenile crust from the depleted mantle by the ca.…”

mentioning

confidence: 76%

Detrital zircon of 4.1 Ga in South China

Huang

et al. 2012

Chin. Sci. Bull.

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One hadean zircon from the Cambrian sandstone in the southern part of South China has a U-Pb age of 4107±29 Ma with ε Hf (t) value similar to that of the homochronous depleted mantle and Hf model age of 4102±21 Ma. This demonstrates the existence of hadean crustal remnant in South China. A close match between the U-Pb age and Hf model age with the highly position ε Hf (t) value indicates the growth and immediate reworking of juvenile crust from the depleted mantle at ca 4.1 Ga. The prominent "Pan-African" and Grenville zircons derived from the exotic sources were also found in the sample, which indicates a linking between South China and Gondwana in the Cambrian period. The southern part of South China has complex histories of crustal growth and tectonic evolution. detrital zircon, 4

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“…The timing of the onset of plate tectonics is still debated, but recent studies have proposed that convection of the Hadean mantle in the stagnant-lid regime possibly involved intermittent drip-like subduction (Foley et al 2014;O'Neil and Debaille 2014). A tectonic regime of stagnant-lid convection with intermittent subduction has been supported by results from multiple analytical studies on Jack Hill zircons (Hopkins et al 2010;Kemp et al 2010;Tarduno et al 2015). Hopkins et al (2010) estimated the temperature and pressure conditions for the formation of Jack Hill zircons using the Ti-in-zircon thermometer and the phengite, Al-in-hornblende, and Tiin-quartz barometers.…”

Section: A Scenario For the Formation Of The Eer In The Hadeanmentioning

confidence: 98%

“…Hopkins et al (2010) estimated the temperature and pressure conditions for the formation of Jack Hill zircons using the Ti-in-zircon thermometer and the phengite, Al-in-hornblende, and Tiin-quartz barometers. From the estimated pressure and temperature conditions of zircon formation, they obtained Kemp et al (2010) investigated the Pb and Hf isotopic compositions of Jack Hill zircons. They calculated the residence time of the protolith of the Jack Hill zircons to be ca.…”

Section: A Scenario For the Formation Of The Eer In The Hadeanmentioning

confidence: 99%

Major element composition of an Early Enriched Reservoir: constraints from 142Nd/144Nd isotope systematics in the early Earth and high-pressure melting experiments of a primitive peridotite

Kondo

Yoshino

Matsukage

et al. 2016

Prog. in Earth and Planet. Sci.

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The Accessible Silicate Earth (ASE) has a higher 142 Nd reservoir is believed to have been derived from a melt in the early Earth and is called the Early Enriched Reservoir (EER). Although the major element composition of the EER is crucial for estimating its chemical and physical properties (e.g., density) and is also essential for understanding the origin and fate of the EER, which are both major factors that determine the present composition of the Earth, it has not yet been robustly established. In order to determine the major element composition of the EER, we estimated the age and pressuretemperature conditions to form the EER that would best explain its Nd isotopic characteristics, based on Sm-Nd partitioning and its dependence on pressure, temperature, and melting phase relations. Our estimate indicates that the EER formed within 33.5 Myr of Solar System formation and at near-solidus temperatures and shallow uppermantle pressures. We then performed high-pressure melting experiments on primitive peridotite to determine the major element composition of the EER at estimated temperature at 7 GPa and calculated the density of the EER. The result of our experiments indicates that the near-solidus melt is iron-rich komatiite. The estimated density of the near-solidus melt is lower than that of the primitive peridotite, suggesting that the EER melt would have ascended in the mantle to form an early crust. Given that high mantle potential temperatures are assumed to have existed in the Hadean, it follows that the EER melt was generated at high pressure and, therefore, its composition would have been picritic to komatiitic. As the formation age of the EER estimated in our study precedes the last giant, lunar-forming impact, the picritic to komatiitic crust (EER) would most likely have been ejected from the Earth by the last giant impact or preceding impacts. Thus, the EER has been lost, leaving the Earth more depleted than its original composition.

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Hadean crustal evolution revisited: New constraints from Pb–Hf isotope systematics of the Jack Hills zircons

Cited by 431 publications

References 64 publications

The zircon archive of continent formation through time

The zircon archive of continent formation through time

Detrital zircon of 4.1 Ga in South China

Major element composition of an Early Enriched Reservoir: constraints from 142Nd/144Nd isotope systematics in the early Earth and high-pressure melting experiments of a primitive peridotite

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