Although Mr Dlamini will not have operational oversight of the mining businesses in South Africa, which range from platinum to coal, he will have a seat on the group's executive committee in London.
In Asia, China's Shanghai Composite Index climbed 1.4% as hopes of increased government spending on a wide range of investment projects lifted coal and construction companies.
The company owns and operates a fleet of 29 dry bulk carriers that transport a wide range of commodities, including coal, iron ore, grains, bauxite, phosphate, fertilizers and steel products.