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天台山磷矿位于汉中市城北20余公里处;为南秦岭地槽中段南缘,南以略阳—褒城—金水河街大断裂为界与扬子地台毗邻。该含磷岩系的时代归属问题,因无生物化石依据,已争议多年。最早,赵亚曾、黄汲清根据该区地层岩性组合与邻区对比,怀疑与镇安系相当而划属上古生代;六十年代,陕西区调队曾先后将该区含磷岩系划归石炭系中、上统;泥盆系中统;第四地质队则依据上覆有石炭系下统地层(含珊瑚化石)而将含磷岩系划为泥盆系;一九八○年,区调队新编1∶50万地
Tiantai phosphate rock is located in Hanzhong City, north of more than 20 kilometers; southern margin of the southern section of the southern Qinling Mountains to the south of Lueyang - Pa-city - Jinshuihe Street fault with the Yangtze Delta adjacent to the boundary. The age of phosphorus-bearing rock series is attributed to the absence of biological fossils, which has been controversial for many years. The earliest, Zhao Ya Zeng, Huang Jiqing lithology combination of the area under the lithology and adjacent areas, suspected and Zhen’an Department is equivalent to the classification of the Paleozoic; sixty time, Shaanxi Province, Regiment has successively classified the area containing phosphorus rock series Carboniferous, the upper; Devonian system; The fourth geological team is based on overlying the Carboniferous lower strata (including coral fossils) and the phosphorus-bearing rock series are classified as Devonian; in 1980, District transfer team new 1: 500000