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引言英国早古生代时期大部分火成活动和构造活动同NE—SW向的亚皮特斯海(Iapetus)逐渐闭合期间板块边缘发生的作用有关。在志留纪和早泥盆世 ,与最终闭合阶段相伴随,在苏格兰的北部大陆出现了增生棱体和大规模钙碱性火成活动。这一火成活动构成一套闪长岩—花岗岩深成侵入体,即纽厄花岗岩套(Newer granite suite),其年龄介于435至392百万年,以及一套与大陆沉积物相伴随的玄武岩—安山岩—流纹岩火山岩套。上述大陆沉积物与火山岩套组成所谓的古老红色砂岩地层(Old Red Sandstone,缩写为ORS)。
INTRODUCTION Most of the Early Cretaceous volcanism and tectonism in the United Kingdom were related to the role of the NE-SW to the edge of the plate during the gradual closure of the Iapetus sea. In the Silurian and Early Devonian phases, accompanied by the eventual closure, proliferating prisms and large-scale calc-alkaline events were observed in northern Scotland. This igneous activity constitutes a suite of diorite-granite deep-burial intrusions, the Newer granite suite, which is between 435 and 392 million years old and a suite of sediments associated with the continent Basalt - Andesite - Rhyolite volcanic sheath. The above-mentioned continental sediments and volcanic suites form the so-called Old Red Sandstone (ORS).