【摘要】 将青藏高原北部祖尔肯乌拉山一带,广泛分布的一套近水平熔岩被状产出的、同位素年龄为古近纪始新世中晚期的中酸性熔岩(岩性主要为安粗岩、粗面岩、橄榄玄粗岩夹火山角砾岩),新建为正式组级岩石地层单位祖尔肯乌拉山组,指定了正层型和副层型剖面,并进行了详细描述。更多还原

【Abstract】 A sequence of subhorizontal intermediate-acid lavas is widespread in the Jurhen Ul Mountain area of the northern Qinghai-Tibet Plateau.It is composed mainly of latite,trachyte and shoshonite with volcanic breccia.Isotopic age determination shows that these volcanic rocks are of mid-late Eocene age.This sequence of lavas is attributed to a new established formal lithostratigraphic unit called the Jurhen Ul Formation in this paper.The holostratotype and parastratotype sections of the Jurhen Ul Formation are as-signed and described in detail.更多还原