Abstract—The paper contains original data on the rock-forming and rare element compositions in the Pliocene–Holocene alkaline basaltoids of the Tsushima Basin Sea of Japan, obtained by the “wet chemistry” method, atomic emission spectrometry, and inductively coupled plasma mass spectrometry. Based on interpretation of these data, the geochemical and geodynamic features of this stage of volcanism were established; the source of magmogenesis was revealed, represented by garnet peridotites. The withinplate plume–continental nature of the alkaline basaltoids was established, indicated by the high alkalinity and potassium content of rocks, Ta–Nb maximum, high normalized La/Yb (22–28) and La/Sm (3–6) values, as well as high Ti/V, Nb/Y, Zr/Y, Zr/Hf, Th/Yb, and Nb/Ta indices close to chondrite. The withinplate nature is also to some degree confirmed by the closeness of the chemical features of Tsushima basaltoids to rocks of Zinbochu and Udalyanche volcanoes of the Central Asian withinplate province (CAWP) located to west from the Sea of Japan, and it was formed in the Late Cenozoic under the influence of the North Asian superplume.

中文翻译：

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日本海对马盆地上新世-全新世碱-玄武岩火山作用：新的地球化学和地球动力学数据

摘要—该论文包含有关日本对马盆地海上新世一全新世碱性玄武岩中成岩和稀有元素组成的原始数据，这些数据是通过“湿化学”方法，原子发射光谱法和电感耦合等离子体质谱法获得的。在解释这些数据的基础上，建立了火山活动这一阶段的地球化学和地球动力学特征。揭示了成岩的来源，以石榴石橄榄岩为代表。建立了碱性玄武岩的板内羽状-陆相性质，表现为岩石的高碱度和钾含量，Ta-Nb最大值，高归一化La / Yb（22-28）和La / Sm（3-6）值，以及高Ti / V，Nb / Y，Zr / Y，Zr / Hf，Th / Yb和Nb / Ta指数接近球粒晶。