In many porphyry copper deposits, additional enrichment of the metal has been caused by surficial weathering.
Surficial weathering is becoming the focus of earth and environment science research recently
In addition, the mechanism of surficial decoration for those low - dimension nano - structured materials is studied simply
In this paper, purification process of carbon nanotubes and pre - treatments of surficial decoration for them are studied carefully, and the experimental conditions of surf icial decoration for carbon nanotubes on a large scale are optimized
Through researching the rhythmic change regularity of ore texture and structure, mineral composition and content, rare element " s change feature and the exploding temperature of mineral inclusion, combining the theory of magmatic ore - forming, the forming process of panzhihua vanadic titano - magnetite deposit could be divided into four periods : rock - forming period, main ore - forming period, hydrothermal period and surficial processing period