摘要
澜沧-孟连火山岩带是下石炭统基性火山岩带,以碱性杆栏玄武岩系列为主,并富含Pb,是Pb的矿源层。产于大陆边缘裂谷区(澜沧裂谷)。岩浆起源于地下35～70公里深度范围内,是地幔二辉杆栏岩局部熔融产生的低熔岩浆结晶产物。
The Lan Cang-Meng Lian volcanic rock-belt is a basic volcanic rock belt ofthe lower arboniferous series.The rocks chiefly belong to the alkali olivinebasalt series,contain lumbum ichly and should be the source bed of plumbum.It forms in the continental margin rifts(Lan ang ift).The magma originatedin the depth from 35 to 70 kilometres below the surface of the earth nd it ishe product of the crystallization of the lower degree melted magma producedby the part elting of two pyroxene peridotite in the earth mantle.
关键词
火山岩带
火山岩
特征
成因
the alkali olivine basalt series
the continental margin rifts
the petrologic characteristies
Yun Nan
