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用碱熔法新测得Jade热液区 7件海底块状硫化物样品的锇含量及其同位素组成 ,1 87 Os/1 86Os比值在 2 2 0 5— 6 462之间 ,均值为 4 31 4,高于地幔端员 ,而低于海洋沉积物和海水端员 ,表明该区块状硫化物中锇是深部来源锇与海水和 /或沉积物混合的产物。结合该区块状硫化物样品的REE、硫和铅同位素组成特征 ,进一步揭示出海水、长英质火山岩、沉积物和深部地幔源是形成Jade区块状硫化物的物源。
The osmium content and isotopic compositions of seven seafloor massive sulphide samples in the Jade hydrothermal zone were newly measured by alkaline fusion method. The 87Os / 1 86Os ratio was between 2056 and 462, with an average of 4 31 4 , Higher than the mantle member and lower than that of the marine sediments and seawater terminals, indicating that osmium in the massive sulphide is the product of deep source osmium mixed with seawater and / or sediment. Combined with the REE, sulfur and lead isotopic compositions of massive sulphide samples in this area, it is further revealed that seawater, felsic volcanic rocks, sediments and deep mantle sources are the source of massive sulphide in the Jade area.