在贝加尔断裂带中,新生代火山作用主要表现为不同类型的玄武岩,仅在乌多坎地区除了玄武岩外,还发育有粗面岩、宾莫尔岩(Бенморит)等,其岩石种类比较繁多。 本文作者之一(В.И.Герасимовский)于1977年在通卡河谷、治达和维季姆高原等三个地区,采集了150个新生代喷发岩样品。除了一个粗面岩样品外,其余均为玄武岩和碧玄岩。描绘在Macdonald和Kar- In the Baikal fault zone, the Cenozoic volcanism is mainly characterized by different types of basalts. In addition to the basalt in the Udoakan area, there are also the trachyids and the broom moorings (Бенморит). The rock types are quite diverse. One of the authors of this article (В.И.Герасимовский) collected 150 samples of Cenozoic eruptions in 1977 in three areas, the Tonka Valley, the Jeddah and the Vidim Plateau. In addition to a rough sample, the rest are basalt and bixonite. Painted at Macdonald and Kar-