蛇绿岩带碳酸盐化超基性岩金矿床的成矿特征

蛇绿岩带碳酸盐化超基性岩金矿床的成矿特征黄婉康，冉红彦（中国科学院广州地球化学研究所，广州５１０６４０）关键词金矿床，超基性岩，碳酸盐化，蛇绿岩近年来，我国在蛇绿岩带陆续发现一些金矿床，如新疆达拉布特蛇绿岩带的萨尔托海Ｉ、Ｖ金矿，云南哀牢山蛇绿岩带北...

The Metallogenetic Characteristics of Gold Deposits Related to Carbonatized Ultramafites in Ophiolites

The metallogenetic characteristics of gold deposits related to carbonatized ultramafites, such as Sartohey-I, Mojiang and Jianchaling Sold deposits as well as Laowangzhai gold ore-field, are reported as follows:1)Many ore-forming materials of gold deposits are inherited from the ultramafites;2)The tectonic and fracture systems are not only as the channels of the ore-fluid movement, but also as the beneficial ore-forming positions;3)There are several ore-forming stages and characteristic alterations;4) Their metallogenetic epoch may be close to the time of ultramafite emplacement,but they are mostly produced during the later structure-magmatic cycles;5)The isotopic data show that their metallosenetic fluids come from polysources. On the basis mentioned above, the mineralization model for this kind of gold ores is suggested.