Zircon Behaviour in Deeply Subducted Rocks
Zircon Behaviour in Deeply Subducted Rocks
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DOI：
10.2113/gselements.3.1.31
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发表时间：
2007-02
期刊：
影响因子：
4.5
通讯作者：
D. Rubatto;J. Hermann
中科院分区：
文献类型：
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作者：
D. Rubatto;J. Hermann
锆石是深俯冲地壳岩石中的一种微量成分，在研究深俯冲地壳岩石中具有重要意义。锆石中的微小矿物包裹体可能是岩石被俯冲至150公里深处的唯一标志。由于锆石对物理和化学变化具有抵抗力，它在亚毫米级的颗粒中保留了俯冲和折返历史的各个阶段。先进的原位技术使我们能够确定锆石域的日期，并确定其微量元素组成。因此，我们可以获得这些非凡岩石所经历的温度-压力-时间路径的详细知识。锆石研究提供的证据表明，俯冲和折返作用的板块构造速度为1-3厘米/年。
Zircon is of fundamental importance in the investigation of deeply subducted crustal rocks in which it is a trace constituent. Tiny mineral inclusions within zircon may be the only indicators that rocks were subducted to a depth of up to 150 km. Because zircon is resistant to physical and chemical changes, it preserves stages of the subduction and exhumation history within submillimetre-size grains. Advanced in situ techniques allow us to date zircon domains and to determine their trace element composition. We can thus acquire a detailed knowledge of the temperature-pressure-time paths that these extraordinary rocks have experienced. Zircon studies provide evidence that subduction and exhumation act at plate tectonic speeds of 1-3 cm/year.