Characteristics and age of the dingqing ophiolite in xizang ( tibet ) and their geological significance .

西藏丁青蛇绿岩特征、时代及其地质意义。

The contents of bee in ultramafic rocks from tanbale ophiolite are determined by preconcentration neutron activation analysis , contents of others trace elements in them are measured by instrument neutron activation analysis .

用预浓集中子活化法测定唐巴勒蛇绿岩中超镁铁质岩中稀土元素(ree)含量，用仪器中子活化法测定其中其他微量元素。