Application of sequential fragmentation/Transport to deposits of 1723 and 1963-65 eruptions of Irazú Volcano, Costa Rica: Positive dispersion case and fractal model

Revista Geológica de América Central

Brenes, José¹  Alvarado, Guillermo E.² 

[1] Red Ciudadana de Estaciones Meteorológicas, San Rafael de Heredia, Costa Rica;Universidad de Costa Rica, Costa Rica

关键词: Sequential fragmentation/Transport;    Hurst coefficient;    power law exponent;    volcanic fractal model;    Irazú volcano;    Costa Rica;   

DOI  :  

学科分类：地质学

来源: Universidad de Costa Rica * Editorial

【 摘 要 】

The Sequential fragmentation/transport theory (SFT), applied to grain size analysis of the deposits from the 1723 and 1963-65 Irazú volcano eruptions, showed an appreciable number of cases with positive dispersion, usually associated to particle aggregation. A new fractal dimension is proposed here to explain them as a secondary fragmentation process. This leads to a new fractal model of volcanic eruptive process, where the Hurst Coefficient and the power law exponent are included. Dispersion values near zero suggest the existence of lava pools. Results deduced from the model agree well with field observations.

【 授权许可】

CC BY-NC