福建宁化下伊锡矿地质特征及成因探讨

On the Geologic Characteristics and Genesis of the Xiayi Tin Mine in Ninghua County,Fujian Province

宁化下伊锡矿产于晚白垩世花岗斑岩内外接触带附近,受北东向、北北东向断裂控制。目前已发现锡矿体6个,各矿体呈脉状、长透镜状产出,锡石贮存于硅化、黄铁矿化、云英岩化蚀变岩中,属中-高温热液脉状型矿床。

The Xiayi tin mine deposit in Ninghua county was discovered in the contact zone of Late cretaceous granite porphyry and it is controlled by the faulted structures with the east-northeast trend and north-northeast. At present six tin orybodys have been found and act like the veiny and long lenticular. The cassiterite deposit exists the silicification , pyritization and dolomitization altered rock. The tin deposit is meso-dpithermal generally-vein type deposit.