What is the black iron ore in the brucite mine

A: other minerals or impurities.


A hundred marks of brucite prospecting


According to the data at home and abroad, the metallogenic regularity and prospecting criteria of brucite are as follows:


（1） It is a basic intrusive body and its homologous vein rock;


（2） The surrounding rock is mainly aluminosilicate hornfels formed by sheet shale alteration;


（3） In the Proterozoic strata, the distribution areas of mafic rich marble, limestone, dolomite, basic dyke and serpentine altered by ultrabasic rocks are close to each other;


（4） Contact zone between mafic carbonatite and migmatite or granitoid;


（5） The metasomatic magnesite, such as the metamorphic rock of the magnesian carbonate assemblage, occurs as brucite body in its mineralized position;


（6） Asbestos ore and boron answered ore are the best metallogenic areas of brucite;


（7） There are quite developed linear paleoweathering crust in landform.