Primary dispersion halos from a impregnation type Nb-Ta granite in Hunan have been dealt with in this paper. Using Nb, Ta, W, Sn, Be, Li, Rb, Cs as indicator elements, the author has successfully detected ore anomalies and then delineated ore bodies. As evolution of elements finds expression in ore body associations, abundance of minerals and variations in typomorphic minerals, mineralogical features such as mineral halos and characters of typomorphic minerals seem likely to furnish their own information for ore detection. Vertical zoning of primary halos suggests that, in locating ore bodies, Li, Rb, Cs, Bi, Aa may be used as distant indicator elements whereas Nb, Ta, Be serve well as near-ore indicator elements.
[1] 南京大学地质系,1981年,华南不同时代花岗岩类及其与成矿的关系。科学出版社。
[2] 中国科学院地球化学研究所,1979,华南花岗岩类的地球化学,科学出版社,236页。
[3] 苏贤泽等,1973,铬英石类矿物的标型特征,地球化学,第三期。
[4] Vinau, M, B., et al, 1980, The TiO2/Ta ratio as an Indicator of the degree of differentiation of tin granites, 《Minerahum Deposita》 Vol. 15, No 2.