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西准噶尔达拉布特蛇绿岩带绵延近百千米。该带中目前除已探明有铬矿外,还产有黄金,是成矿较好的远景区,因此人们又把它称为“新绿岩带”。笔者在对达拉布特蛇绿岩带南、北两亚带进行初步研究后,感到北亚带大棍地段的基性熔岩具有特殊的地质意义,有必要着重对其进行专门探讨。本文以大棍基性熔岩的稀土和岩石化学资料为基础,与芬兰太古代绿岩带做对比,试图说明它们具有科马提玄武岩性质,意在为该带寻找金矿提供新的依据。
West Junggar Dalbot ophiolite belt stretches nearly one hundred kilometers. At present, except for the proven chromium ore, gold is also produced in the belt, which is a good prospect area for mineralization. Therefore, it is also called “new green rock belt”. After a preliminary study of the south and north two sub-belts of the Dalbott ophiolite belt, the authors find that the basic lava in the geo-sticking area of the north subtropical belt is of special geological significance and it is necessary to focus on its special study. Based on the rare earth and petrochemical data of the volcanic basement lavas, this paper compares them with the Archean Archean Greenland in Finland, trying to show that they have the characteristics of komati basalt and provide a new basis for the gold prospecting of the belt.