Rate of growth of the preserved North American continental crust: Evidence from Hf and O isotopes in Mississippi detrital zircons

Wang, Christina Yan; Campbell, Ian H.; Allen, Charlotte M.; Williams, Ian S.; Eggins, Stephen

doi:10.1016/j.gca.2008.10.037

Cited by 124 publications

(64 citation statements)

References 72 publications

(114 reference statements)

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“…This is based on the premise that this age reflects the age of extraction from the depleted mantle reservoir, and that subsequent zircon crystallization occurred much later; the difference between these events is commonly known as the crustal residence time (e.g. Wang et al 2009;Lancaster et al 2011). Although the underlying reasoning behind this premise remains valid, it remains uncertain how often a host magma will have remained a closed system since extraction from the mantle.…”

Section: Use and Abuse Of Model Agesmentioning

confidence: 99%

“…These have been used as a broad representation of the continental crust for studying its age and composition, and from this, the patterns of continental growth and evolution (e.g. Wang et al 2009Wang et al , 2011Iizuka et al 2010Iizuka et al , 2013. In this paper, we review some of the major contributions that zircon studies have made to our understanding of the formation and evolution of continental crust.…”

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confidence: 99%

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The zircon archive of continent formation through time

Roberts¹,

Spencer²

2014

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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: Use and Abuse Of Model Agesmentioning

confidence: 99%

mentioning

confidence: 99%

The zircon archive of continent formation through time

Roberts¹,

Spencer²

2014

200

136

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“…The fastest continental crust growth period of the North China Craton is ~2.7 Ga Geng et al, 2012;Peng et al, 2012Peng et al, , 2013Wang et al, 2012Wang et al, , 2013Zhao and Zhai, 2013;Zheng et al, 2013;Bao et al, 2013). The other hypothesis is that the mass of continental crust that formed between 4.0 Ga and 4.5 Ga was similar to today's and has been a steady-state since then with continental crust being recycling into the mantle as fast as it forms (Armstrong and Harmon, 1981;Armstrong, 1991;Wang et al, 2009;Yang et al, 2009).…”

Section: Gamentioning

confidence: 99%

“…The growth rate of continental crust remains controversial, with two opposite hypothetical models of which the most widely accepted one is that the majority of continental crust began to form after 4.0 Ga and has been growing irreversibly since then (Moorbath, 1977;Fyfe, 1978;McLennan and Taylor, 1982;Hawkesworth and Kemp, 2006;Kemp et al, 2006;Wang et al, 2009;Yang et al, 2009;Dhuime et al, 2012). According to previous studies, the continental crust in the early Precambrian has several main growth periods, 3.6 Ga, 2.7 Ga, 1.8 Ga and vial sediments can provide a new perspective on the growth rate of continental crust.…”

Section: Introductionmentioning

confidence: 99%

“…According to previous studies, the continental crust in the early Precambrian has several main growth periods, 3.6 Ga, 2.7 Ga, 1.8 Ga and vial sediments can provide a new perspective on the growth rate of continental crust. Because the fluvial sediment composition can reveal information about provenances of sediments, and zircons from fluvial sediments can be resistant to chemical weathering and mechanical abrasion, so they can survive weathering from their protoliths to river mouths where a single sample can provide information about the sources of an entire river basin (Rino et al, 2004;Wang et al, 2009;Yang et al, 2009). In the last decades, although extensive investigations have been carried out on the formation and evolution of the North China Craton, which led to discovery three Paleoproterozoic continent-continent collisional belts (Khondalite Belt, Trans-North China Orogen and Jiao-Liao-Ji Belt) (Wan et al, 2000(Wan et al, , 2006a(Wan et al, , 2012bZhao et al, 2000Zhao et al, , 2011Guan et al, 2002;Guo et al, 2005Guo et al, , 2012Xia et al, 2006;Zhang, J. et al, 2006Zhang, J. et al, , 2007Zhang, J. et al, , 2009Zhang, J. et al, , 2012Jian et al, 2012;Zhao and Guo, 2012), most of these investigations were focused on tectonic processes operative during the amalgamation of microcontinental blocks along these collisional belts, but few studies were concentrated on the accretion of the North China Craton, and especially on the accretion rates.…”

Section: Introductionmentioning

confidence: 99%

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Growth rate of continental crust in the northeast margin of the North China Craton: Constraints from the U-Pb dating and Lu-Hf isotopes of detrital zircons from the Laoha River

et al. 2013

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Recently, how to quantitatively estimate the growth rate of continental crust is an enigmatic issue. With the development of ICP-MS technology, the U-Pb dating and Lu-Hf isotopic compositions of detrital zircons from the fluvial sediments can provide an effective and simple approach to constrain the growth rate and evolutionary history of continental crust. In this paper, 189 concordant detrital zircons from the Laoha River have been analyzed for U-Pb ages and Lu-Hf isotopic compositions by excimer LA-MC-ICP-MS. Detrital zircons from samples LH and LH2 show three major age groups, i.e., 2370 Ma~2572 Ma, 1728~2087 Ma, 127~376 Ma and 2374~2598 Ma, 1765~2087 Ma, 119~405 Ma, respectively. They have the common prominent two stage Hf model ages with a peak at ca. 2.7 Ga, which is consistent with the global continental crust. These indicate that the timing of the strongest magmatic events is at ca. 2.5 Ga and 1.8 Ga, and the best estimation age of mantle extraction of the northeast margin of North China Craton is ca. 2.7 Ga. The detrital zircons with U-Pb ages of ~1.8 Ga and ~2.5 Ga have the two stage Hf model ages of ca. 2.7 Ga, whereas ε Hf (t) values are different from those of depleted mantle. These indicate that the majority of continental crust of the northeast margin of North China Craton at time of ~1.8 Ga originated from the reworking of ~2.7 Ga crust. About 5% of the present crustal volume in the northeast margin of North China Craton was formed at 2.9 Ga; whilst ~64% of the present crustal volume in the northeast margin of North China Craton has been formed at 2.5 Ga, which is higher than that of previous studies. It suggests that the continental crust growth in the North China Craton is not uniform, but it is consistent with the episodic growth of global continental crust (60%). Moreover, the majority continental crust of the northeast margin of North China Craton has been formed at 1.8 Ga (84%) as previously interpreted. Finally, we have used formulas to quantitatively calculate the reworking rate and give a suggestion that the time of 2.5 Ga is also the main growth period of continental crust of the North China Craton, and the time of 1.8 Ga is the strongest reworking period of the continental crust in the craton. In addition, the reworking rate began to drop after reactivating in the North China Craton, and the addition of depleted mantle was gradually increased.

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Geochronology and geochemistry of the Dashui adakitic granitoids in the western Qinling Orogen, central China: implications for Triassic tectonic setting

2014

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The Dashui porphyry granitoids in the western Qinling Orogen are spatially associated with the Dashui gold deposit, but their ages and tectonic setting have not been well defined yet in previous studies. This paper reports the results and understandings obtained from our original study in geochronology and isotope and element geochemistry. SHRIMP zircon U-Pb dating yielded ages of 213.7 ± 2.7 Ma for granitic stock and 215.1 ± 2.5 and 210.2 ± 1.6 Ma for granitic dikes. The granitoids are characterized by high LREE but low HREE and HFSE. They have ( 87 Sr/ 86 Sr) i ratios of 0.706 to 0.709 and εNd(t) values of À5.3 to À7.6. The majority of zircons in the Dashui granitoids have εHf(t) values ranging from À6.2 to 6.7 and T DM2(Hf) ages from 743 to 1464 Ma. The isotope signatures, together with La/Y and Mg # values, show that the magmas are mainly sourced from partial melting of a subducted slab, and possibly assimilated immature sediments during upward migration. Thus, the Dashui granitoids most likely formed in a volcanic arc where supra-subduction zone melts assimilated lower crustal material no later than 215 Ma.

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Rate of growth of the preserved North American continental crust: Evidence from Hf and O isotopes in Mississippi detrital zircons

Cited by 124 publications

References 72 publications

The zircon archive of continent formation through time

The zircon archive of continent formation through time

Growth rate of continental crust in the northeast margin of the North China Craton: Constraints from the U-Pb dating and Lu-Hf isotopes of detrital zircons from the Laoha River

Geochronology and geochemistry of the Dashui adakitic granitoids in the western Qinling Orogen, central China: implications for Triassic tectonic setting

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