Boninite is an extrusive rock high in both magnesium and silica, thought to be usually formed in fore-arc environments, typically during the early stages of subduction. The rock is named for …

2019年6月7日 · Boninites are rare, high-Si, high-Mg, low-Ti lavas that have considerable tectonic significance, especially for recognizing and interpreting episodes of subduction initiation in the …

Boninite refers to a type of lava and intrusive rock that is characterized by high concentrations of magnesium oxide (MgO) and silicon dioxide (SiO2), along with low concentrations of titanium …

玻古安山岩 （英語： Boninite） 是一種鎂和矽含量高的鎂鐵質噴出岩，一般是在俯衝帶的早期階段形成在 弧前 環境的火成岩。 該岩石因產於日本南部的伊豆-博寧弧而得名。 它的特點是缺乏 …

2020年11月16日 · Boninites are highly refractory volcanic rocks commonly associated with nascent subduction zones. The type locality for boninite is Chichijima (Bonin Island) in the Izu …

2023年9月1日 · Boninite is a particular type of subduction-zone setting magmas characterized by high SiO 2 (> 52 wt%) and MgO (> 8 wt%), low TiO 2 (< 0.5 wt%).

2021年2月5日 · Much of the boninite magmatism in the Izu–Bonin–Mariana arc is preserved as evolved boninite series compositions wherein extensive fractional crystallization of pyroxene …

The boninite series volcanics range from 52 to 68% SiO2, and are characterized by very low abundances of high-field-strength cations and heavy-rare-earth elements. Boninites and …

2002年1月1日 · Boninites are high Mg andesites that are enriched in Large Ion Lithophile Elements (LILE) and extremely depleted in High Field Strength Elements (HFSE) relative to …

We find that with a mode of continuous initiation with infant-arc spreading, the foundering of the subducting slab and water release from the slab govern a succession from basalts with …