海洋地质前沿2017，Vol.33Issue(12)：1-6,6.DOI:10.16028/j.1009-2722.2017.12001
西太平洋采薇海山群基岩特征
CHARACTERISTIC OF SUBSTRATE ROCKS OF CAIWEI SEAMOUNTS IN THE WEST PACIFIC OCEAN
摘要
Abstract
Lithology and distribution of substrate rocks of the Caiwei Seamount are scrutinized.Results show that the substrate of the Caiwei Seamounts is mainly composed of pyroclastic rock,limestone,basalt and phosphorite.Pyroclastic rock is the most common one,and basalt and limestone are the second.Phosphorite is seldom.Microscopic examination suggests that pyroclastic rocks are dominated by basaltic volcanic breccias,and limestone is dominated by sparry bioclastic limestone or micritic bioclastic limestone.Phosphorite is mainly formed by phosphatization of bioclastic limestone or volcanic breccia.Preliminary study on geochemistry of basalts from the Caiwei Seamounts shows that the major elements contents of basalts from the Caiwei Seamounts are similar to that of Hawaii alkaline basalts.It suggests that the basalt might be formed in a tectonic environment of alkali island.关键词
地球化学特征/玄武岩/基岩特征/采薇海山群/西太平洋Key words
geochemistry/basalt/substrate rock/Caiwei Seamounts/West Pacific Ocean分类
海洋科学引用本文复制引用
韦振权,邓希光,朱克超,姚会强,杨永,任江波..西太平洋采薇海山群基岩特征[J].海洋地质前沿,2017,33(12):1-6,6.基金项目
国家自然科学基金(41606071) （41606071）
国际海域资源调查与开发“十二五”课题(DY125-13-R-05,DY125-13-R-01) （DY125-13-R-05,DY125-13-R-01）
