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首页> 外文期刊>Nature >GRANULITE FORMATION DURING CONTINENTAL EXTENSION IN FIORDLAND, NEW ZEALAND
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GRANULITE FORMATION DURING CONTINENTAL EXTENSION IN FIORDLAND, NEW ZEALAND

机译：新西兰FIORDLAND持续扩展过程中的花岗岩粒形成

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THE formation of the high-pressure, high-temperature rocks known as granulites has traditionally been attributed to metamorphism in the deeper parts of continental collision zones and magmatic arcs(1-3). More recently, greater consideration has been given to the arcs possibility of granulite formation during continental rifting(4-6), and in particular(4) to whether granulites are forming today beneath the North American Basin and Range province. Here we report thermobarometric data and single-zircon U-Pb ages for an analogous, but much more deeply exhumed, extensional terrain in Fiordland, New Zealand(7,8), where Early Cretaceous granulites underwent renewed granulite-facies metamorphism at significantly shallower crustal levels following the extensional collapse of magmatically thickened continental crust. Our data show that granulite-facies metamorphism can take place during continental extension, and demonstrate that in western New Zealand it was accompanied at higher structural levels by the emplacement of one or more metamorphic core complexes(7-9), in keeping with the model postulated(4) for the Basin and Range province. [References: 30]
机译：传统上，被称为花岗石的高压高温岩石的形成是由于大陆碰撞带和岩浆弧的深部变质（1-3）。最近，人们更加考虑了大陆裂谷过程中形成花岗石的弧形可能性（4-6），特别是（4）现在是否在北美盆地和兰治省下方形成了花岗石。在这里，我们报告了新西兰Fiordland（7,8）的类似但更深入发掘的伸展地形的热压数据和单锆石U-Pb年龄（7,8），早白垩纪的花岗石在明显较浅的地壳经历了新的花岗石相变质作用。岩浆增厚的大陆壳伸展塌陷后的海平面。我们的数据表明，花岗岩相的变质作用可以在大陆扩张过程中发生，并表明在新西兰西部，较高的结构水平伴随着一种或多种变质核心复合物的进入（7-9），与模型一致为盆地和山脉省假设（4）。 [参考：30]

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