摘要
研究几个矿区侵入体与成矿关系表明,成因不同或演化途径不同的岩浆,其成矿能力有明显差别.成矿岩体与非成矿岩体相比,岩浆受硅铝壳物质混染较强.成矿与非成矿岩体在暗色矿物的种类和数量,某些特征元素的丰度、Al_2O_3/TiO_2值和锶同位素组成方面存在明显差异,反映出硅铝壳物质大量加入岩浆是提高岩浆成矿能力的重要原因,据此可以确定识别成矿与非成矿岩体的地质和地球化学准则.
A study on the relation between the intrusive and mineralization in some mining areas indicatesthat the magma of different origions or from different evolutionary processes are obviously different in their metallogenetic ability. In comparison with those intrusives bearing no relation to themineralization, ore-generating intrusives are much contaminated by salic crustal substance, They arecharacterized by dark minerals of different species and quantity, and have a different abundance ofcertain characteristic elements, a different Al_2O_3/TiO_2 ratio and a different strontium isotopic composition. It demonstrates that the increase of ore-generating ability (or a magma is mainly due to theintroduction of a large quantity of salic crustal substance. On the basis of this geological and geochemical criterion, one can differentiate an ore-generating intrusive from another not related to mineralization.
出处
《地质与勘探》
CAS
CSCD
北大核心
1989年第7期10-15,共6页
Geology and Exploration
