Re－Os同位素体系及其在岩浆Cu－Ni－PGE矿床研究中的应用

Ｒｅ－Ｏｓ同位素由于其较高的半衰期特点，近年来国外广泛用于前寒武纪含Ｃｕ－Ｎｉ－ＰＧＥ镁铁—超镁铁岩成岩年龄测定，并结合其他地球化学数据，对壳幔岩浆源及作用进行解释研究。特别是由于Ｏｓ是６个ＰＧＥ的其中之一，而多用于岩浆Ｃｕ－Ｎｉ－ＰＧＥ矿床贵金属来源的判别。中国岩浆Ｃｕ－Ｎｉ－ＰＧＥ矿床以金川矿床为代表，已有的研究表明，可能存在岩浆混合成矿作用，开展Ｒｅ－Ｏｓ同位素体系的研究将会提供进一步判断的证据

Re Os ISOTOPIC SYSTEM AND ITS APPLICATION TO STUDY OF MAGMATIC Cu Ni PGE DEPOSIT

In this paper an introduction to Re Os isotopic system and its application to study of Cu Ni PGE deposit related to mafic ultramafic rock in the world is made. Re Os isotopic system, recently, is widely used in dating of precambrian bearing Cu Ni PGE mafic ultramafic rocks in terms of its high half life, explaining magmatic sources and evolution in combincation with other geochemical data. Moreover, Os, as one of 6 PGE, is frequently applied to the study of the origin of precious metals in magmatic Cu Ni PGE deposits. The author suggests that the Jinchuan, one of the largest magmatic Cu Ni sulfide deposits, may have occurred magma mixing during forming ore, and that the research of Re Os isotopic systematics to this ore deposit should be carred on in order to get further judgements.