Abstract

New petrogeochemical data were used to determine the conditions of the formation and tectonic setting of volcanic rocks of the Lake Udyl’ area. These rocks were compared with similar rocks in the region. The volcanic rocks of the Lake Udyl’ area are subdivided into two genetic types: (1) within-plate oceanic volcanic rocks ascribed to the accretionary volcanogenic–siliceous complex (Tithonian–Valanginian–Hauterivian–Barremian) similar to accretionary complexes in other segments of the Kiselevka–Manoma Terrane, and (2) suprasubduction-zone volcanic rocks from the island-arc volcanogenic-terrigenous complex (Valanginian–Hauterivian–Aptian–Albian–Cenomanian). A synthesis of new geological and petrogeochemical data, as well as previous geochronological and paleomagnetic data indicates the co-occurrence of genetically diverse complexes in the Udyl’ segment.

中文翻译：

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Kiselevka-Manom​​a增生层（Sikhote-Alin）Udyl段的火山岩：岩石地球化学，形成条件和构造背景

摘要

新的岩石化学数据用于确定乌迪尔湖地区火山岩的形成条件和构造环境。将这些岩石与该地区的类似岩石进行了比较。乌迪尔湖地区的火山岩分为两种成因类型：（1）板块内的大洋火山岩归因于增生的火山成因-硅质复合体（提通-瓦朗吉尼-豪特里维安-巴里米亚），类似于该区其他段的增生复合体。 Kiselevka-Manom​​a地形，以及（2）来自岛弧火山成因-陆源复合体（瓦朗吉尼安-豪特里夫安-阿普提安-阿尔本-西诺曼尼亚）的超俯冲带火山岩。综合了新的地质和岩石化学数据，