当前位置: X-MOL 学术Sci. Bull. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Two styles of plate tectonics in Earth’s history
Science Bulletin ( IF 18.9 ) Pub Date : 2019-12-16 , DOI: 10.1016/j.scib.2018.12.029
Yong-Fei Zheng 1 , Guochun Zhao 2
Affiliation  

When plate tectonics started to occur on Earth and how it has evolved through time are two of the most fundamental questions in earth science. While gravity-driven subducting has been accepted as a critical condition for the operation of plate tectonics on Earth, it is intriguing how the dynamic regime and thermal state of subduction zones have affected the style of plate tectonics in Earth’s history. The metamorphic rocks of regional distribution along convergent plate boundaries record reworking of crustal rocks through dehydration and melting at lithospheric depths. The property of regional metamorphism is determined by both dynamic regime and thermal state of plate margins. The two variables have secularly evolved in Earth’s history, which is recorded by changes in the global distribution of metamorphic facies series through time. This results in two styles of plate tectonics. Modern-style plate tectonics has developed since the Neoproterozoic when plate margins were rigid enough for cold subducting, whereas ancient-style plate tectonics has developed since the Archean when plate margins were ductile enough for warm subducting. Such a difference is primarily dictated by higher mantle temperatures in the Archean than in the Phanerozoic. The development of plate subduction in both cold and warm realms is primarily dictated by the rheology of plate margins. This leads to a holistic model for the style of plate tectonics during the different periods in Earth’s history.



中文翻译:

地球历史上两种类型的板块构造

板块构造何时开始在地球上发生以及它如何随时间演变是地球科学中两个最基本的问题。虽然重力驱动的俯冲已被认为是地球板块构造运行的关键条件,但俯冲带的动态状态和热状态如何影响地球历史上板块构造的类型仍然很有趣。沿会聚板块边界区域分布的变质岩记录了地壳岩石在岩石圈深处脱水和熔融的改造过程。区域变质作用的性质由板块边缘的动力状态和热状态共同决定。这两个变量在地球历史上长期演化,通过变质相系列全球分布随时间的变化记录下来。这导致了两种类型的板块构造。现代板块构造自新元古代开始发展,当时板块边缘足够坚硬以进行冷俯冲,而古代板块构造自太古代以来发展,当时板块边缘具有足够的延展性以进行暖俯冲。这种差异主要是由太古代的地幔温度高于显生宙的地幔温度决定的。冷域和暖域板块俯冲的发展主要由板块边缘的流变学决定。这导致了地球历史不同时期板块构造风格的整体模型。而古代板块构造自太古代以来就已经发展起来,当时板块边缘具有足够的延展性以进行暖俯冲。这种差异主要是由太古代的地幔温度高于显生宙的地幔温度决定的。冷域和暖域板块俯冲的发展主要由板块边缘的流变学决定。这导致了地球历史不同时期板块构造风格的整体模型。而古代板块构造自太古代以来就已经发展起来,当时板块边缘具有足够的延展性以进行暖俯冲。这种差异主要是由太古代的地幔温度高于显生宙的地幔温度决定的。冷域和暖域板块俯冲的发展主要由板块边缘的流变学决定。这导致了地球历史不同时期板块构造风格的整体模型。

更新日期:2019-12-17
down
wechat
bug