マグマ溜まりが周辺地殻に与える熱的影響

概要

論文の詳細を見る
A thermal model for a cylindrical magma chamber is considered in order to assess its influence on thermal structure of the surrounding crust. The calculated results show the following two possible influence patterns when a typical magma-supply rate for Japanese Quaternary volcanoes (0.1-1 km^3/1000 yr.) is given to the system. The temperature of a small magma chamber (several cubic kilometers in volume) remains above solidus for a long time but result in small extent (a few kilometers) of thermal influence. On the other hand, a large magma chamber (several hundreds of cubic kilometers or more in volume) can only survive for several tens of thousand years but result in large extent (up to ten kilometers) of thermal influence at its peak stage. Comparing the thermal structures calculated based on this model with the geophysical observations relevant to crustal thermal structure for an active volcano is helpful to evaluate the applicability of depth and size of the magma chamber proposed for the volcano.
特定非営利活動法人日本火山学会の論文
2000-07-10