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苏联的希有金属花岗岩,是50年代末、60年代初发现的。这种花岗岩常构成小穹窿,属于再生的分异复杂的花岗岩杂岩体的晚期侵入相,生成于浅成条件下,分布于构造带的交汇或结合处。岩体顶部富含碱、挥发份(氟)和希有金属,其含量向深部逐渐减少。可以划分出两类类似的矿床:①褶皱区发育末期形成的自岗岩岩体和岩株,②固结褶皱构造活化带中形成的弱碱性和碱性花岗岩类岩体。①类中,岩体的近顶部地段富含黄玉、钽矿物、锂云母,有时还有磷铝锂石和锡石。②类中,岩体受钠长石化,富含萤石、冰晶石、氟铈镧矿和氟钠钙石。岩体中还含有铌(铌铁矿、烧绿石)、锆、希有金属和铀—钍矿
The Soviet Union’s Greek metal granite, is the late 50s, early 60s found. Such granites often form small domes and belong to the late invaded facies of the reclaimed complex granitoids. They are formed under shallow conditions and distributed at the junction or junction of structural belts. The top of rock mass is rich in alkali, volatile (fluorine) and Greek metal, its content gradually reduced to the deep. Two similar types of deposits can be distinguished: ① self-moving granite and rock mass formed at the end of fold development; and ② weak alkaline and alkaline granitoids formed in the consolidated fold belt. In the category, the top of the rock mass is rich in topaz, tantalum minerals, lepidolite, and sometimes apolomite and cassiterite. ② In the class, the rock bodies are elongated by sodium, rich in fluorite, cryolite, bastnaesite and attapulgite. Rock mass also contains niobium (niobite, pyrochlore), zirconium, Greek metals and uranium - thorium