Abstract—Granitoids and dikes of Svyatoy Nos pluton of Cape Svyatoy Nos in the northwestern part of Verkhoyansk-Kolyma folded area, cutting terrigenous and volcanogenic-sedimentary rocks of Upper Jurassic–Lower Cretaceous, are considered. Obtained U‒Pb SIMS geochronological data on zircons from granitoids and dike rocks indicate, that their crystallization ages correspond to Aptian‒Albian (119–111 Ma). Petrography and geochemical affinitites of rocks allow to refer granitoids and felsic dikes to I-type granites. Similarity in chemical composition with coeval granitoids of Great Lyakhovsky Island, the most northern member of Chokhchuro‒Chokurdakhsky submeridional belt of granitoids and Aptian‒Albian granitoids of sublatitudinal belt of Anyui‒Chukotka fold belt is shown. Earlier it was established by many authors, that intrusion of Aptian-Albian granitoids and dikes (117–105 Ma) on the Arctic margin of Chukotka and in the northwestern part of Verkhoyansk‒Kolyma folded area occurred during extension. Aptian‒Albian age, post-shortening character of intrusion and similarity of Svyatoy Nos granitoids in chemical composition with mentioned above Aptian-Albian granitoids allow to refer them to a single stage of postcollisional extension.

中文翻译：

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北极东部Svyatoy Nos花岗岩体和堤堰岩石的年龄，组成和地球动力学背景

摘要-在Verkhoyansk-Kolyma折叠区西北角的Svyatoy Nos角的Svyatoy Nos岩体的花岗岩和堤防，被认为可以切割上侏罗纪-下白垩统的陆源和火山沉积的岩石。从花岗岩和堤防岩石中获得的锆石的U‒Pb SIMS地质年代学数据表明，它们的结晶年龄对应于阿普提安·阿尔比（119-111 Ma）。岩石的岩石学和地球化学亲和力允许将花岗岩和长石堤称为I型花岗岩。显示了化学成分与大Lyakhovsky岛，Chokhchuro‒Chokurdakhsky花岗岩半带的最北段和Anyui‒Chukotka褶皱带的副带的Aptian‒Albian花岗岩的化学成分相似。较早之前，它是由许多作者建立的，延伸期间发生了楚科奇北极边缘和Verkhoyansk‒Kolyma折叠区西北部的阿普特人-阿拉伯花岗岩和堤防（117-105 Ma）的入侵。Aptian-Albian年龄，入侵后缩短特性以及Svyatoy Nos花岗岩在化学成分上与上述Aptian-Albian花岗岩相似，这使它们可以称为碰撞后扩展的单个阶段。