黑龙江省莲花山第四纪火山

本文论述了黑龙江省莲花山火山的火山景观、喷发时代、岩石学和岩石化学、构造和经济地质。根据莲花山火山石龙岩同位素测年和第四纪地层层序资料,其喷发时代属早更新世。新取得的岩石的稀土元素、微量元素、幔源包体和巨晶资料表明其岩性和五大连池相似,又略有差别。作者认为莲花山和尖山为五大连池火山往-西南的延伸。广义的五大连池火山群包括五大连池、莲花山和尖山,共21座火山锥。

Lianhuashan Quaternary volcano in Heilongjiang Province

This paper discusses the volcanic landscape,eruption time,petrology,petrochemistry,structure and economic geology of Lianhuashan volcano in Heilongjiang Province.According to the isotopic dating of Shihlunites and stratigraphic sequence of the Quaternary strata of Lianhuashanvolcano,its eruption time is ascertained as Pleistocene.The obtained data of rare earth elements,trace elements,mantle-source inclusions and meagacrysts show that the petrology and petrochemistry of Lianhuashan volcano are similar to those of Wudalianchi volcano,with a slight difference between them.The authors considered that the Lianhuashan and Jianshan volcanoes are the southwestward extended part of Wudalianchi volcano.In a broad sense,Wudalianchi volcanic group includes Wudalianchi,Lianhuashan and Jianshan volcanoes,altogether consisting of 21 volcanic cones.