1·Prior to 1960, geologists Bowen and Hess disagreed over whether or not the very high temperatures needed to produce magmas rich in magnesium could have existed on Earth.
在1960年之前,地质学家鲍温和赫斯在地球上是否存在产生富含镁的岩浆所需的高温这一问题上存在分歧。
2·Normally, he said, volcanologists have to do "postmortem studies" of long-solidified magmas or study active lava.
据马施的经验,一般情况下,火山学家只能就凝结成岩的岩浆做一些“马后炮”的工作,或者在火山喷发的时候以熔岩为研究材料。
3·How does Etna produce its fiery mix of magmas?
埃特纳如何制造出它炙热的混合岩浆呢?
4·However, the temperatures and oxygen fugacity of magmas at high level magma chamber decreased along with fractional crystallization.
但在高位岩浆房中,随着分离结晶作用的进行,岩浆的温度和氧逸度逐渐降低。
5·The evidences indicate that the magmas are formed by melting of pyrolite and eclogite (ancient basaltic oceanic crust) in the axial zone of mantle plume.
这说明它们是在地幔柱轴部,由地幔岩和榴辉岩(古玄武质洋壳)组成的源区产生的岩浆形成的。