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首页> 外文期刊>Journal of the Geological Society >New dates (415 Ma) for the Etive Dyke Swarm and the end of the Caledonian Orogeny in the SW Grampian highlands of Scotland
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New dates (415 Ma) for the Etive Dyke Swarm and the end of the Caledonian Orogeny in the SW Grampian highlands of Scotland

机译:Etive堤防群的新日期(415 Ma)和苏格兰西南格兰比高原的加里东造山运动结束

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摘要

New laser stepwise heating Ar-40-Ar-39 dates (415 +/- 1.8 and 414 +/- 2 Ma) from the Etive Dyke Swarm in the SW Grampian Highlands of Scotland indicate that the dykes are 10-20 Ma older than previously assumed. The dykes constitute the final phase of the Late Caledonian Granites in the region, which themselves define the end of the Caledonian Orogeny, therefore these dates can be taken as the end of the orogeny in this area. The dates show a temporal link between the Etive magmatism and early precious metal mineralization at Tyndrum as well as emphasizing the NW to SE diachronous nature of the end of Caledonian magmatism across Scotland.
机译:来自苏格兰西南格兰比高地的Etive堤群的新激光逐步加热Ar-40-Ar-39日期(415 +/- 1.8和414 +/- 2 Ma)表明该堤比以前大10-20 Ma假定。堤坝构成了该地区晚古苏格兰的花岗岩的最后阶段,它们本身就确定了古苏格兰造山运动的终结,因此这些日期可被视为该地区造山运动的终结。这些日期显示了廷迪鲁姆Etive岩浆作用与早期贵金属矿化之间的时间联系,并强调了整个苏格兰的Caledonian岩浆作用末期从西北到东南的年代性。

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