【摘 要】
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The formation and destruction of continental crust involve processes that are directly associated with plate tectonics.However,when plate tectonics started on Earth and whether it operated like modern
【机 构】
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Geology Department,University of Campinas,Campinas,13083-970,Brazil
【出 处】
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The International Conference on Continental Dynamics(2014年大陆
论文部分内容阅读
The formation and destruction of continental crust involve processes that are directly associated with plate tectonics.However,when plate tectonics started on Earth and whether it operated like modern style subduction are issues of considerable debate.For instance,many authors suggest subduction may have commenced toward the end of the Archaean or later (e.g.Furnes et al.,2009;Turner et al.,2014).Others argue that the first appearance of eclogite inclusions in diamonds (Shirey and Richardson,2011) and the decrease in the rate of crustal growth owing to recycling (Dhuime et al.,2012) at～3 billion years ago mark the onset of subduction-driven plate tectonics and of the Wilson cycle.However,high-pressure metamorphic rocks such as eclogite are rare in Archaean cratons (e.g.Mints et al.,2010) suggesting that plate tectonics did not spread all over the Earth until the end of the Archaean or even much later (Stern,2005).
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