C and O isotopic data demonstrate that these gases are derived from the felsic magma system;
气体的碳、氦同位素资料表明其来自长英质岩浆体系；
The existing of earthquake swarm, S wave shadow in some seismic stations and gradually uplifting of surface suggest a magma system beneath these volcanoes.
火山区存在的震群活动、部分台站观测到的S波阴影区以及地表的缓慢抬升等，指示火山区存在一个岩浆系统。
They are formed from groundwater saturated in calcium sulphate which, warmed by an intrusion of magma about a mile below, began filtering through the cave system millions of years ago.
其因为地下水渗透到硫酸钙中，又被几百万年前渗透到洞穴系统的将近一米深的岩浆温暖所形成的。
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