黄骅坳陷古近系孔店组火成岩岩石学、地球化学特征

详细信息

刊出日期: 2015-12-25

Petrology and Geochemistry Characteristics of Magmatic Rocks in Kongdian Formation in the Huanghua Depression

Publish Date: 25 December 2015

摘要: 本文通过对黄骅坳陷古近系钻孔中孔店组玄武岩、辉绿岩的岩相学、地球化学研究,认为孔店组火成岩属于碱性玄武岩系列,轻稀土富集,没有明显的铕异常.岩浆演化主要受控于地幔部分熔融,结晶分异作用较小,无明显地壳物质的加入,其形成的构造环境为板内环境.
- 黄骅凹陷 /
- 孔店组 /
- 火山岩 /
- 地球化学 /
- 板内环境
Abstract: Based on the Petrographic and geochemical study of the Lower Tertiary Kongdian formation basalt and diabase in Huanghua Depression,we suggest that basalt and diabase belong to alkaline series with LREE enrich-ment and no Eu anomality. The magma evolution was mainly controlled by the mantle partial melting with little crystallization differentiation and little crustal contamination. Tectonic environment discrimination results show that the magmatic rocks of the Kongdian formation formed in intraplate environment.
- Huanghua depression /
- Kongdian formation /
- volcanic rock /
- geochemsitry /
- WPB