Abstract
Although Earth’s continental crust is thought to have been derived from the mantle, the timing and mode of crust formation have proven to be elusive issues. The area of preserved crust diminishes markedly with age1,2, and this can be interpreted as being the result of either the progressive accumulation of new crust3 or the tectonic recycling of old crust4. However, there is a disproportionate amount of crust of certain ages1,2, with the main peaks being 1.2, 1.9, 2.7 and 3.3 billion years old; this has led to a third model in which the crust has grown through time in pulses1,2,5,6,7, although peaks in continental crust ages could also record preferential preservation. The 187Re–187Os decay system is unique in its ability to track melt depletion events within the mantle and could therefore potentially link the crust and mantle differentiation records. Here we employ a laser ablation technique to analyse large numbers of osmium alloy grains to quantify the distribution of depletion ages in the Earth’s upper mantle. Statistical analysis of these data, combined with other samples of the upper mantle, show that depletion ages are not evenly distributed but cluster in distinct periods, around 1.2, 1.9 and 2.7 billion years. These mantle depletion events coincide with peaks in the generation of continental crust and so provide evidence of coupled, global and pulsed mantle–crust differentiation, lending strong support to pulsed models of continental growth by means of large-scale mantle melting events6.
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References
Gastil, G. The distribution of mineral dates in space and time. Am. J. Sci. 258, 1–35 (1960)
Hurley, P. M. & Rand, J. R. Pre-drift continental nuclei. Science 164, 1229–1242 (1969)
Allègre, C. J. & Rousseau, D. The growth of the continents through geological time studied by Nd isotope analysis of shales. Earth Planet. Sci. Lett. 67, 19–34 (1984)
Armstrong, R. L. Radiogenic isotopes: the case for crustal recycling on a near-steady-state no-continental-growth Earth. Phil. Trans. R. Soc. Lond. A 301, 443–472 (1981)
Goldstein, S. L., Arndt, N. T. & Stallard, R. F. The history of a continent from U–Pb ages of zircons from Orinoco River sand and Sm–Nd isotopes in Orinoco basin river sediments. Chem. Geol. 139, 271–286 (1997)
Condie, K. C. Episodic continental growth and supercontinents. Earth Planet. Sci. Lett. 163, 97–108 (1998)
Kemp, A. I. S., Hawkesworth, C. J., Paterson, B. A. & Kinny, P. D. Episodic growth of the Gondwana supercontinent from hafnium and oxygen isotopes in zircon. Nature 439, 580–583 (2006)
Pearson, D. G. in Mantle Petrology: Field Observations and High Pressure Experimentation (eds Fei, Y., Bertka, C. M. & Mysen, B. O.) 57–78 (Spec. Pub. Geochem. Soc. no. 6, Houston, TX, 1999)
Carlson, R. W., Pearson, D. G. & James, D. E. Physical, chemical and chronological characteristics of continental mantle. Rev. Geophys. 43, 1–24 (2005)
Brandon, A. D., Snow, J. E., Walker, R. J., Morgan, J. W. & Mock, T. D. 190Pt–186Os and 187Re–187Os systematics of abyssal peridotites. Earth Planet. Sci. Lett. 177, 319–355 (2000)
Harvey, J. et al. Ancient melt extraction from the oceanic upper mantle revealed by Re–Os isotopes in abyssal peridotites from the Mid-Atlantic ridge. Earth Planet. Sci. Lett. 244, 606–621 (2006)
Meibom, A. & Frei, R. Evidence for an ancient osmium isotopic reservoir in Earth. Science 296, 516–518 (2002)
Meibom, A. et al. Re-Os isotopic evidence for long-lived heterogeneity and equilibration processes in the Earth’s upper mantle. Nature 419, 705–708 (2002)
Harris, D. C. & Cabri, L. J. Nomenclature of platinum-group-alloys: Review and revision. Can. Mineral. 29, 231–237 (1991)
Brenker, F. E., Meibom, A. & Frei, R. On the formation of peridotite-derived Os-rich PGE alloys. Am. Mineral. 88, 1731–1740 (2003)
Sobolev, A. V. et al. The amount of recycled crust in sources of mantle-derived melts. Science 316, 412–417 (2007)
Alard, O. et al. In situ Os isotopes in abyssal peridotites bridge the isotopic gap between MORBs and their source mantle. Nature 436, 1005–1008 (2005)
Mateev, S. & Balhaus, C. Role of water in the origin of podiform chromitite deposits. Earth Planet. Sci. Lett. 203, 235–243 (2002)
Walker, R. J. et al. Comparative 187Re–187Os systematics of chondrites: implications regarding early solar system processes. Geochim. Cosmochim. Acta 66, 4187–4201 (2002)
Sambridge, M. S. & Compston, W. Mixture modelling of multi-component data sets with application to ion-probe zircon ages. Earth Planet. Sci. Lett. 128, 373–390 (1994)
Jasra, A., Stephens, D. A., Gallagher, K. & Holmes, C. C. Bayesian mixture modelling in geochronology via Markov chain Monte Carlo. Math. Geol. 38, 269–300 (2006)
Parkinson, I. J., Hawkesworth, C. J. & Cohen, A. S. Ancient mantle in a modern arc: Osmium isotopes in Izu–Bonin–Mariana forearc peridotites. Science 281, 2011–2013 (1998)
Parman, S. W. Helium isotopic evidence for episodic mantle melting and crustal growth. Nature 446, 900–903 (2007)
Hattori, K. & Hart, S. R. Osmium-isotope ratios of platinum-group minerals associated with ultramafic intrusions; Os-isotopic evolution of the oceanic mantle. Earth Planet. Sci. Lett. 107, 499–514 (1991)
Walker, R. J. et al. 187Os–186Os systematics of Os–Ir–Ru alloy grains from southwestern Oregon. Earth Planet. Sci. Lett. 230, 211–226 (2005)
Brandon, A. D., Walker, R. J. & Puchtel, I. Platinum–osmium isotope evolution of the Earth’s mantle: Constraints from chondrites and Os-rich alloys. Geochim. Cosmochim. Acta 70, 2093–2103 (2006)
Shi, R. D. et al. Multiple events in the Neo-Tethyan oceanic upper mantle: evidence from Ru–Os–Ir alloys in the Luobusa and Dongqiao ophiolitic podiform chromitites, Tibet. Earth Planet. Sci. Lett. doi: 10.1016/j.epsl.2007.05.044 (2007)
Griffin, W. L., Graham, S., O’Reilly, S. Y. & Pearson, N. J. Lithosphere evolution beneath the Kaapvaal Craton: Re–Os systematics of sulfides in mantle-derived peridotites. Chem. Geol. 208, 89–118 (2004)
Griffin, W. L., Spetsius, Z. V., Pearson, N. J. & O’Reilly, S. Y. In situ Re–Os analysis of sulfide inclusions in kimberlitic olivine: New constraints on depletion events in the Siberian lithosphere. Geochem. Geophys. Geosyst. 3 1069 doi: 10.1029/2001GC000287 (2002)
Ludwig, K. R. Isoplot. Program and documentation, version 2.95. Revised edition of US Open-File report. 91–445 (1997)
Acknowledgements
We thank P. Nixon, the British Museum of Natural History, C. Francis of the Harvard Museum and the Tasmanian Geological Survey for the supply of PGAs used in this study, A. Brandon for making the paper more robust, L. Jaques for advice on sourcing PGAs, and M. Goldstein and K. Gallagher for guidance on statistical approaches.
Author Contributions All authors contributed equally to this study.
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Supplementary Information
The file contains Supplementary Figures 1-13 with Legends, Supplementary Methods and Supplementary Tables 1-5. (PDF 403 kb)
Supplementary Data
The file contains Supplementary Data giving measured 187Os/188Os ratios and in-run precision together with Re depletion ages (calculated relative to the Ordinary Chondrite average – Ref 19, Main Text). (XLS 118 kb)
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Pearson, D., Parman, S. & Nowell, G. A link between large mantle melting events and continent growth seen in osmium isotopes. Nature 449, 202–205 (2007). https://doi.org/10.1038/nature06122
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DOI: https://doi.org/10.1038/nature06122
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