南岭地区脉状黑钨矿床的地球化学类型

GEOCHEMICAL TYPES OF THE VEIN WOLFRAMITE DEPOSITS IN THE NANLING REGION

In accordance with the characteristics of associated minerals, trace elments in the altered rocks around the veins and the composition of wolframite and mica, the vein wolframite deposits in the Nanling Region can be divided into two geochemical types:the wolframite-beryl-molybdenite-bismutite (native bismuth) type and the wolframite.cassiterite-sulfide (copper, zine, lead) type. Vein wolframite deposits of these two geochemical types were formed under different conditions. The wolframite-beryl-molybdenite-bismutite (native bismuth) type may be connected with high pH-Eh conditions whereas the wolframite-eassiterite-sulfide (copper, zinc, lead) type with low pH-Eh conditions. It is concluded that the two geochemical types of vein wolframite deposits are genetically related with two different geochemical types of granites in the Nanling Region.

In accordance with the characteristics of associated minerals,trace elments in thealtered rocks around the veins and the composition of wolframite and mica,the veinwolframite deposits in the Nanling Region can be divided into two geochemical types:the wolframite-beryl-molybdenite-bismutite(native bismuth)type and the wolframite-cassiterite-sulfide(copper,zinc,lead)type.Vein wolframite deposits of these two geochemical types were formed under dif-ferent conditions.The wolframite-beryl-molybdenite-bismutite(native bismuth)typemay be connected with high pH-Eh conditions whereas the wolframite-cassiterite-sul-fide(copper,zinc,lead)type with low pH-Eh conditions.It is concluded that the two geochemical types of vein wolframite deposits aregenetically related with two different geochemical types of granites in the NanlingRegion.