although the amygdaloidal native copper aggregate was known in vesiculate lava at the top of the emeishan basalts, economic copper ore deposits had not been discovered until two years ago.
过去已知在峨眉山玄武巖顶部气孔状熔巖中含有杏仁状自然铜,但很少构成连续的铜矿体。
the rock types include amygdaloidal basalt, dolerite, massive basalt, olivine basalt and andesite-basalt, which belong to the alkali basalt series.
巖石类型包括杏仁状玄武巖、粗玄巖、块状玄武巖、橄榄玄武巖和安山玄武巖,属堿性玄武巖系列。
the lavas mainly include basalt, dolerite, fumarolic, amygdaloidal andesite, trachy-andesite and as well as rhyolite.