摘要
文章从温都尔宙蛇绿岩中枕状玄武岩和辉绿岩的微量元素地球化学特征出发,确定其源岩为大洋中脊拉斑玄武岩。温都尔庙蛇绿岩属异地蛇绿岩,是古洋壳在板块俯冲带的残留岩块。微量元素显示的岩石成因信息表明,枕状玄武岩和辉绿岩是同源岩浆,它们是在没有明显分馏和分异作用条件下,依次冷凝结晶形成的。
Judging from the geochemical features of trace elements of the metamorphic pillow basalt and diabase in Wenduermiao ophiolite, the original rock of ophiolite should belong to tholeiite formed in an oceanic ridge. The ophiolite is allopatric, belonging a remanent rock mass of a subduction zone of an ancient oceanic crust.
The information in rock genesis shown by the trace elements indicats that the pillow basalt and diabase are homologous. They are successively formed though cooling and crystallizing under the conditions without obvious fractional distillation and differentiation.
