摘要
湘西北镍钼金属矿床，矿石中Ｎｉ、Ｍｏ、Ｐｔ族和Ａｓ、ＳＥ等元素高度富集。矿石δ３４Ｓ（－１３．０‰—－１７．９‰）与围岩δ３４Ｓ（＋１６．６‰—＋２４．９‰）截然不同，是硫源不同所致。硅岩的氧同位素值δ１８ＯＳＭＯＷ＝１８．１２‰—２２．５‰，可能与海底喷流有关。矿石的ＲＥＥ值比围岩高数十倍，属亏Ｃｅ、亏Ｅｕ、弱富ＬＲＥＥ型。上述地球化学特征表明了湘西北镍钼多金属矿床的形成特征。
The Ni-Mo polymetallic deposit in northwestern Hunan is highly enriched by Ni, Mo, Ptgroup elements and As, SE, and etc. The difference of δ 34 S between ores (-13.0‰—-17.9‰) and country rock (+16.5‰—+24.9‰) is distinct, and this was caused by two kinds of sulfur source. The oxygen isotope value ( δ 34 O SMOW =18.2‰—22.55‰) in silicalite is large and positive which may be related to submarine exhalation. The value of ΣREE in ore , is tens times higher than that in country rock, the REE distribution pattern of the ores belongs to the type of weak rich LREE, in which Ce and Eu are depleted. The above geochemical characteristics indicate that the formation of Ni-Mo Polymetallic deposit in northwestern Hunan is related to submarine exhalation.
出处
《地球化学》
CAS
CSCD
北大核心
1997年第3期89-96,共8页
Geochimica
基金
煤炭部煤炭科学基金
关键词
镍矿床
钼矿床
多金属矿床
喷气沉积
地球化学
Ni-Mo polymetallic deposit, element association, stable isotope, rare earth element,submarine exhalation, Hunan Province
