Its heat reservoir is composed of Yanshanian granite-porphyry and tuff of Mesozoic.
热储由中生代燕山期花岗斑岩、凝灰岩组成。
2
The metallogenic rock are biotite and intense-silicified granite-porphyry of the early stage of Xishan .
喜山早期黑云母花岗斑岩、强硅化花岗斑岩是区内斑岩型铜、钼矿床的成矿母岩。
3
A desert of eastern Egypt between the Nile Valley and the Red Sea. Porphyry, granite, and sandstone found here have been used as building materials since ancient times.