火山岩系列 meaning in English

volcanic sequence

Among the felsic rocks , samples from the zhangjiakou formation ( fm . ) are characterized by moderately to strongly eu anomalies , and variable negative anomaly of sr , ti and p , whereas samples from the donglingtai fm . exhibit enriched lree and flat hree patterns with nb / ta fractionation and high zr / sm ratios
在中酸性火山岩系列中，张家口组火山岩表现出中等-强烈的eu负异常和不同程度的sr 、 ti 、 p负异常；东岭台组火山岩表现出富集lree和平坦的hree的稀土配分模式， nb ta分馏，高zr sm比值。