thereinto the porosities are higher than other lithologies in volcaniclastic rock and neutral to neutral acidic volcanic.
其中火山碎屑巖和中—中酸性火山巖的孔隙度较高。
it is though that ore-forming materials such as sulfur, arsenic and gold in jinya gold mining must come from underlying basic rock and basic volcaniclastic rock late permian in age.