>>79
But, they asserted that energy-sources of eruption are originated in heats issued from radioactive matters, on the other hand, they also have never clearly explained how radioactive decay heats are concentrated on magma chambers.
Furthermore, it has never been made sure that radioactivities contained in matters released from a volcano are especially high compared with those found out in other places.
Accordingly, it's clearly insufficient to quantitatively analyze compositions of volcanic issued matters such as volcanic ashes, lava for knowing compositions and characters of magma.
Because, at high temperature and high pressure in the deep part under the ground, even rocks are transmuted into metals, variations of its compositions and characters remarkably depend on difference in cooling condition at the eruption.
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