兰花嶺矿区所出露的地层大部份为前震旦纪变质岩系,仅于局部高山地带见有震旦纪钓鱼台统石英岩成不整合复盖于前震旦纪岩层之上,并见有3—4公尺厚的基底砾岩。厚层千枚岩多出露在矿区的东部,向西逐渐递变为千枚岩、,大理岩、角闪片岩互层岩石组,至矿区之西部则以厚层大理岩为主。震旦纪钓鱼台统石英岩 Most of the strata exposed in the Lanhueling area are pre-Sinian metamorphic rocks. Only the Sinian-derived Ordovician quartz rocks were unconformable over the Pre-Sinian strata in the local high-mountain area and the 3- 4 meters thick basal conglomerate. The thick phyllites are mostly exposed in the eastern part of the mining area and gradually turned westward into phyllite, marble and hornblende interbedded rocks, and to the west of the mine is dominated by thick marble. Sinian Diaoyutai quartzite