加拿大由几个地块组成,最有名的是格林维尔地块。其年龄为10亿年。今天主要讨论格林维尔造山带的形成问题。有一种观点认为它不是北美地块的一部分,而原来在很远的地方,后来碰撞而成的。我不同意这一观点,这将在报告中用事实来说明。 加拿大的变质岩有深变质岩石,中变质岩石和低变质岩石。我们所研究的是该省的三个岩体,为闪长岩和辉长岩。这些岩石易于做古地磁测量。这三个岩 Canada consists of several plots, most notably Greenville Plots. Its age is 1 billion years. Today, we mainly discuss the formation of the Greenville orogen. There is a view that it is not part of the North American plots, but originally faraway places that later collided. I do not agree with this view, which will be explained in the report by facts. Canada’s metamorphic rocks are deep metamorphic rocks, metamorphic rocks and low metamorphic rocks. We are studying the three rock mass in the province, diorite and gabbro. These rocks are easy to make paleomagnetic measurements. These three rocks