【摘要】 岭后矿床为大陆拗陷带中形成的块状硫化物矿床,产于中石炭统底部伴有少量火山岩、硅质岩和碧玉岩的白云岩中。整合块状矿体之下有一状矿化蚀变带,矿石具典型海底喷气沉积作用形成的结构构造和矿石相(带),矿床金属分带、黄铁矿的Co/Ni和S/Se比值。成矿温度以及硫。铅同位素特征表明,岭后矿床为海相火山热液沉积成因的。更多还原

【Abstract】 The Linghou deposit occurs at the bottom of the Middle Carboniferous carbonate rocks, and was previ-ously regarded as a typical post-magmatic hydrothermal product. However, the current detailed field andlaboratory investigations reveal that it is actually a massive sulfide deposit directly related to the LatePaleozoic submarine volcanism. The main orebodies are stratiform and lenticular, concordant with the occurrences of the host rocks.Beneath the main orebodies a pips-like alteration zone with sulfide veinlets was developed. The ores havetypical striped and load-flow structure as well as colloidal texture, which suggest a hydrothermal syngenet-i? sedimentary origin. A typical stratigraphical zonation is observed. Cu is concentrated in the lower part,While Pb and Zn in the upper part. The Co/Ni and S/Se ratios in pyrite as well as the sulfur and oxygenisotope data show that the origin of the deposit was associated with submarine volcanic exhalation andhydrothermal sedimentation.更多还原