五大连池火山崩落堆积物研究

Volcaniclastic Accumulation of Laoheishan Volcano and Huoshaoshan Volcano in Wudalianchi

五大连池世界地质公园内的老黑山与火烧山火山外围分布有大量圆丘状火山碎屑堆积物,以往人们将其称为"副火山",即认为是独立的火山。本文认为这些堆积物来自这两座火山锥体的破坏。当锥体坡脚处有熔岩流溢出时,在重力作用下坡体发生裂解、崩塌,于是在坡体上形成沟谷,而垮落的坡体碎屑物则随着熔岩流的流动,堆积在火山锥体的外围,虽然有的堆积成较大的锥状体,但它们不是火山,而是火山崩落堆积物。

Large amounts of volcaniclastic accumulation in the shape of round hillocks around the outside part of Laoheishan Volcano and Huoshaoshan in the Wudalianchi World In early times they were called satellite volcanoes, which means they were recognized distribute Geopark. as single volcanoes. This paper points out that these accumulations actually came from disruptions of those two volcanic cones. When the outflow of lava appeared at the basal slope of the cone, the slope broke up and collapsed by the function of gravitational force, then ravine was formed in the slope. Accumulations of slope which were collapsed then flew with lava and accumulated at the outside of volcano cones. Although some deposits are very large, they are not volcanoes. Instead they are deposits of volcanic collapse.