求翻译：火山岩中K2O的含量与火山岩的空间分布密切，相同SiO2含量的火山岩，随着从海沟向大陆方向的延近，K2O的含量有逐渐增加的趋势，这种现象叫“成分极性”，它也反映了随着空间上向大陆一侧迁移及俯冲深度的增加，大陆地壳组分参与岩浆活动程度也逐渐增大是什么意思？

Volcanic rocks k2o's content and distribution of volcanic rocks in space closely, the same sio2 content of volcanic rocks, with the direction to the mainland extended nearly from the trench, K2O content of a growing trend, a phenomenon called "component polarity, it is also reflect a continental cru

In lava O K 2 the content of the spatial distribution and lava, and the same close SiO2 content of volcanic rock, with the trench from the mainland's direction, the cost of content O K 2 a gradual increase in the phenomenon, called "the polarity, it also reflects on the mainland side to migration an

In the volcanic rock the K2O content and the volcanic rock spatial distribution is close, the same SiO2 content volcanic rock, along with extends near from the oceanic trench to the mainland direction, the K2O content has the gradual increase tendency, this kind of phenomenon calls “the ingredient p

K2O content of volcanic rock worked closely with the spatial distribution of volcanic rocks, volcanic rocks of the same content of SiO2, as from the trenches to the continental extension of near, K2O content of an increasing trend, this phenomenon is called "component polarity", it also reflects as

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