【摘要】 本文主要根据皮尔斯比率图解讨论了山东临朐山旺地区玄武岩浆的分离结晶作用。研究表明,在山旺南部玄武岩中,原生的碱性橄榄玄武岩浆通过分离结晶出5%～13%和15%～28%的单斜辉石,可分别演变成碧玄岩浆和橄榄拉斑玄武岩浆,而在山旺北部,当碱性橄榄玄武岩浆分异出大约1％～8％的橄榄石、1％～7％的单斜辉石、7％～13％的斜长石时,残余岩浆便演变为碧玄岩浆。更多还原

【Abstract】 This paper studies the fractional crystallization of basaltic magma by Pearce ratio diagram in Shanwang area, Shandong Province . The result shows that the basanitic magma and the olivine tholeiitic magma in the southern area of Shanwang were derived from the primitive alkalic olivine basaltic magma by the fractional crystallization of 5% ~ 13% and 15% ~ 28% clinopyroxene , respectively .And the alkalic olivine basaltic magma in the north of this area can evolved into basanitic magma by the fractional crystallization of about 18% olivine ,1% ~ 7% clinopyroxene and 7% ~ 13% plagioclase .更多还原