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阿尔泰山南缘中泥盆统北塔山组火山岩极为发育。本文对富辉橄玄岩和玄武岩中的单斜辉石和橄榄石斑晶进行了矿物化学分析,并结合矿物的地质温压计和岩浆结晶模拟,约束了两种岩石中矿物的形成过程,推测了原始岩浆的演化过程。提出富辉橄玄岩和玄武岩的原始岩浆属于拉斑玄武系列,富辉橄玄岩中的高压单斜辉石来源于深部(40~50 km),其结晶早于橄榄石;玄武岩中单斜辉石大多属于岩浆房结晶产物(30~40km),其结晶晚于橄榄石;两种岩石中橄榄石均属于岩浆房结晶产物(30~40 km)。
The volcanic rocks in the North Tashan Formation in the southern margin of the Altay Mountain are extremely developed. In this paper, the mineral chemistry analysis of clinopyroxene and olivine plaque in Fuhui basalts and basalts is carried out. Combined with the geothermometer and crystallization simulation of minerals, the formation process of minerals in the two rocks is restrained. The evolution of the original magma. The authors suggest that the original magma of Fuhui basalts and basalts belongs to the pull-out basaltic series. The high-pressure clinopyroxenes in Fuhui basalts originate from deep (40 ~ 50 km) and crystallize earlier than olivine. Most pyroxenes belong to the product of magma chamber (30 ~ 40km), which crystallize later than olivine. Both olivine and olivine belong to the product of magma chamber (30 ~ 40 km).