摘要
赣南-粤西地区的地壳自早元古代晚期开始形成，地壳成熟度较低。该区是我国华南重要的W、Sn、Nb、Ta等矿的重要产地，与中生代岩浆活动有关。成矿的岩浆杂岩具有高硅、富铝、富钾、高F／C1和Rb／Sr值，稀土配分具“海鸥型”模式，以及高Isr、b18O值和低εNd值的同位素特征，岩石成因属S型系列。矿石铅和长石铅同位素组成相似，反映成矿物质与成岩物质的原区相同，都由地壳物质衍生为主。矿床的形成与地壳演化历史，岩浆成因和岩浆源区物质组成等深部地质作用有关。
The crust in South Jiangxi-West Guangdong began to form in the late Lower Proterozoic Subera , and the crust mature degree is lower. There exists many Anportant ore deposits of W,Sn, Nb and Ta. There ore deposits are mainly related to the Mesozoic magmatic activities.The ore-forming magmatic complexes are characterised by abundance of Si, A1 and K, high ratioes of F/C1 and Rb/Sr, high values of Isr and δ18O, lower value of εNd and the chondrite-nor-malized REE patterns in the type of 'gull'. The magmatic rocks genetically belong to the 'S 'type. The lead compositions of ores are similar to those of feldspar, reflecting the origin of oreforming material is the same as that of rock-forming material, and both principally derived from the crust. The formation of ore deposits in this area is genetically related to the crust evolution, the magmatic genesis and the material component of magmatic source area.
出处
《火山地质与矿产》
1996年第3期51-61,共11页
Volcanology & Mineral Resources
关键词
中生代
岩浆杂岩
成矿作用
锡矿床
钨矿床
Mesozoic era magmatic complexes mineralization of W,Sn, Nb and Ta,South Jiangxi-West Guangdong
