汉中地区含磷岩系对比与磷矿床成矿特征的讨论

CORRELATION OF PHOSPHORUS BEARING STRATIGRAPHIES IN THE CENTRAL PART OF SHAANXI AND OREIGINATION OF PHOSPHATE DEPOSITS

汉中地区磷矿主要为早寒武世梅树村期及晚震旦世陡山沱期产物，以前者为主。矿床围绕古陆（特别是摩天岭和汉南古陆）边缘分布，为浅海滨海相沉积产物。磷质物源主要来自古陆，而海底火山活动提供的Ｐ、Ｍｇ、Ｆ成为天台山磷矿形成的重要物源。摩天岭及汉南古陆边缘具有良好的找矿前景。

The phosphate deposits in the central part of shaanxi are generally assigned either the Meishucun age of Early Combrian period or the Doushantuo age of Late Sinian period. They distribute along the margins of old lands, particularly Motianling and Hannan old lands, having a genetic relation to neritic littral depositions. The most likely source of phosphate was from the old lands, but the ore forming elements the Tiantaishan deposit received, such as P, Mg and F, were associated essentially with seafloor volcanic activities. Further inspections suggest that both of the above old lands show good prospects for hunting phosphate resources.