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| 1 | Rates of generation and growth of the continental crust显示文摘Models for when and how the continental crust was formed are constrained by estimates in the rates o crustal growth. The record of events preserved in the continental crust is heterogeneous in time with distinctive peaks and troughs of ages for igneous crystallisation, metamorphism, continental margin and mineralisation. For the most part these are global signatures, and the peaks of ages tend to b associated with periods of increased reworking of pre-existing crust, reflected in the Hf isotope ratios o zircons and their elevated oxygen isotope ratios. Increased crustal reworking is attributed to periods o crustal thickening associated with compressional tectonics and the development of supercontinents Magma types similar to those from recent within-plate and subduction related settings appear to hav been generated in different areas at broadly similar times before ~3.0 Ga. It can be difficult to put th results of such detailed case studies into a more global context, but one approach is to consider when plate tectonics became the dominant mechanism involved in the generation of juvenile continental crust The development of crustal growth models for the continental crust are discussed, and a number o models based on different data sets indicate that 65%-70% of the present volume of the continental crus was generated by 3 Ga. Such estimates may represent minimum values, but since ~3 Ga there has been reduction in the rates of growth of the continental crust. This reduction is linked to an increase in th rates at which continental crust is recycled back into the mantle, and not to a reduction in the rates a which continental crust was generated. Plate tectonics results in both the generation of new crust and it destruction along destructive plate margins. Thus, the reduction in the rate of continental crustal growth at ~3 Ga is taken to reflect the period in which plate tectonics became the dominant mechanism b which new continental crust was generated. | Chris Hawkesworth Peter A.Cawood Bruno Dhuime | 2019 | Geoscience Frontiers2019，10，1： | 9 |
| 2 | A change in the geodynamics of continental growth 3 billion years ago 显示文摘 | Dhuime B Hawkesworth C J Cawood P A | 2012 | Science2012，335，： | 1 |
| 3 | When Continents Formed显示文摘 | DHUIME B HAWKESWORTH C CAWOOD P | 2011 | Science2011，331，： | 1 |
| 4 | The gener- ation and evolution of the continental crust 显示文摘 | Hawkesworth C J Dhuime B Pieranik A B | 2010 | Journal of the Geological Society2010，167，2： | 1 |
| 5 | Emergence of modern continental crust about 3 billion years ago显示文摘 | Dhuime B Wuestefeld A Hawkesworth C J | 2015 | Nature Geoscience2015，8，7： | 1 |
| 6 | The Continental Record and the Generation of Conti- nental Crust显示文摘 | CAWOOD P HAWKESWORTH C J DHUIME B | 2013 | Geological Society of America Bulle- tin2013，125，： | 1 |
| 7 | The generation and evolution of the continental crust显示文摘 | Hawkesworth C J Dhuime B Pietramk A B | 2010 | Journal of the Geological Society2010，167，： | 1 |
| 8 | Age, provenance and post-deposition metamorphic overprint of detrital zircons from the Nathorst Land group (NE Greenland)—A LA-ICP-MS and SIMS study显示文摘 | Bruno Dhuime Delphine Bosch Olivier Bruguier Renaud Caby Simone Pourtales | 2007 | Precambrian Research2007，，1： | 1 |
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