| الوصف: |
Seamount basalts recorded important information of seamount and deep evolution process. Through the analysis of petrology and REE geochemical characteristics of Govorov Guyot, Niulang Guyot, Arnold Guyot, Skornyakova Guyot, Gordin Guyot, McDonnell Guyot, Lingyi Seamount, Xufu Seamounts basalts in the western Pacific, it shows that basalts in study area have amygdaloidal, fumarolic-amygdaloidal and porphyritic texture. Rocks are mainly composed of phenocrysts and matrix. Mineral composition of phenocrysts is mainly plagioclase, olivine and clinopyroxene. Mineral composition of matrix is plagioclase, olivine, clinopyroxene and glassy etc. REE patterns and parameters of each sea mountain basalts reflect the typical characteristics of oceanic island basalts. It indicates that the seamount in study area is a typical volcanic seamount in plate caused by multiple hotspots. At the same time, it may have been influenced by multi-stage fault and magmatic activity. |
