橄榄玄武岩 meaning in English
dorgalite
olivine basalt
Examples
- Siziwangqi of inner mongolia is located on the north margin of north china craton , the junction of north china craton and siberia . granulite xenoliths are found there in cretaceous basalt . these xenoliths are mainly plagioclase - pyroxenite
内蒙古四子王旗地区地处华北板块北缘，与西伯利亚板块的接合部，其早白垩世橄榄玄武岩中发现大量下地壳麻粒岩捕虏体，并可见辉石长石捕虏晶。 - 4 . three type of basalt is recognized in changle region : a , sapphire - embodied alkli - olivine - basalt of niushan group ( most distributed in fangshan ) , enriched with a large number of mantle - orignated xenoliths with different extent of weathering ; b , alkli - olivine - basalt of niushan group with little sapphire embodied , but contan a few mantle - orignated xenoliths usually samller than that of fangshan , most of the mantle - orignated xenoliths weathered seriously only lefting with some vacant caves , this kind of rock mostly lies in cangshan , taohuashan . and qiaoguan volcanic vent , contain amount of ilmenite ; c , olivine - basalt of yaoshan group , contain neither xenoliths nor sapphire
4 、在昌乐地区区分出三类主要的玄武岩： a ，牛山组含矿的碱性橄榄玄武岩，位于方山，含大量的大小不一的风化蚀变程度不同的地幔岩包体； b ，牛山组几乎不含矿的碱性橄榄玄武岩，含少量地幔岩包体，且包体一般比方山小，多数已经遭严重风化而只留下空洞，含有相当数量的钛铁矿，主要位于北岩南部的苍山，桃花山及乔官火山口。