olivine basalt 中文意思是什麼
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On the basis of the study on the petrology, trace element, and isotopic geochemistry, the primary magma of volcanic rocks can be divided into two series according to their originated rocks and degree of partial melting. one is the basanite - alkaline basalt - olivine tholeiite magma series, which are generated by partial melting from spinel iherzolite ; the other is nephelinite magma - alkaline picritic basalt magma, which are generated by partial melting of the garnet iherzolite
巖石化學、微量元素、同位素地球化學證據都表明，華北、華南地區的火山巖根據源巖和局部熔融程度的不同，可以分為兩個原生巖漿系列：一個是源巖為尖晶石二輝橄欖巖，隨著局部熔融程度的增加，形成的碧玄巖巖漿-堿性玄武巖巖漿-橄欖拉斑玄武巖巖漿；另一個是源巖為石榴石二輝橄欖巖，隨著局部熔融程度的增加形成的霞石巖巖漿-堿性苦橄玄武巖系列。 -
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 、在昌樂地區區分出三類主要的玄武巖： a ，牛山組含礦的堿性橄欖玄武巖，位於方山，含大量的大小不一的風化蝕變程度不同的地幔巖包體； b ，牛山組幾乎不含礦的堿性橄欖玄武巖，含少量地幔巖包體，且包體一般比方山小，多數已經遭嚴重風化而只留下空洞，含有相當數量的鈦鐵礦，主要位於北巖南部的蒼山，桃花山及喬官火山口。 -
Alkali olivine basalt
堿性橄欖石玄武巖
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