Welcome to visit Geoscience!

Geoscience ›› 2012, Vol. 26 ›› Issue (2): 220-228.

• Petrology • Previous Articles     Next Articles

Simulation on the Dynamic Process of Volcanic Bombs and Plumes of Laoheishan Volcano in Wudalianchi Area

 LI  Yong-Sheng-1, LIU  Yong-Shun-2, ZHANG  Qiao-Chong-1, NIE  Bao-Feng-2, ZHANG  Dong-Yang-1   

  1. 1 State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences, Beijing100083, China;2 College of Resource, Environment and Tourism, Capital Normal University, Beijing100048, China
  • Received:2012-08-24 Revised:2012-02-10 Online:2012-04-20 Published:2018-09-19

Abstract:

The volcanic eruption is a complex fluid dynamic process of gas, liquid and solid mixtures. A correct understanding of this process is the key factor to study the volcanic eruption. Eject and Plumeria softwares can be good simulations for dynamic processes of volcanic bombs and plumes during real volcanic eruption. On the basis of detailed investigation of volcanic bombs, volcanic debris and the published data of Laoheishan volcano in Wudalianchi area, this study evaluated dynamic processes of Laoheishan volcanic bombs and plumes using Eject and Plumeria softwares. The results show that the bombs ejected from Laoheishan volcano can reach a maximum height of 530 m and a maximum horizontal distance of 1,000 m when ejection angle is 45°; the maximum height of its volcanic plume is 4.7 km, and the plume head radius is 2.3 km. Through the discussion of the eruption scale and the ratio of volcanic ashes, it can be concluded that Laoheishan volcano is a small mafic eruption, and its effect on the environment is small.

Key words: volcanic bomb, volcanic plume, environmental effect, Laoheishan volcano