Characteristics and geological significance of heavy mineral assemblages in bauxite of northern Guizhou

Four samples of bauxite and six samples from the bottom plate were taken in northern Guizhou area for heavy mineral screening analysis. The heavy minerals of the WZD bauxite of northern Guizhou are mainly weathering debris, zircon, pyrite, limonite and anatase. The heavy mineral combination of the Zunyi bauxite of northern Guizhou is mainly composed of white titanium, weathering debris, zircon, rutile, anatase and weathering debris. The characteristics of heavy mineral assemblages in the bauxite of northern Guizhou are similar to those of the underlying stratum, but some heavy minerals in bauxite are not found in the underlying stratum, indicating that the mineralization material of the bauxite of northern Guizhou is provided by various parent rocks. The black ore in the Zunyi area of northern Guizhou has a high content of organic matter. The acidic environment causes the iron to migrate downwards to form pyrite. The black ore also undergoes oxidative leaching, but its ore-forming mechanism is different from that of light-gray bauxite. The ore-forming environment of black bauxite is more acidic than that of light-gray bauxite. © 2021, Science Press. All right reserved.