The Shancaoyu Formation is dominated by biotite- oligoclase granulitite,whose protolith is argillo-arenaceous sedimentary rocks containing small amounts of intermediate-acid volcanic rocks,with a zircon U-Pb concordia upper intercept age of 2498 Ma.

• 山草峪组以黑云更长变粒岩为主,其原岩为含少量中酸性火山岩成分的泥、砂质沉积岩,测得锆石 U-Pb一致曲线上交点年龄为2498Ma;