Mitsubishi subsidiary Mitsubishi Development and Rio Tinto have proposed acquisition of all the remaining shares in Coal & Allied Industries for A$1.49bn ($1.55bn).
Coal & Allied's largest institutional shareholder Perpetual has supported the sale, which is still subject to regulatory approvals.
With the acquisition of Coal & Allied, Rio Tinto and Mitsubishi are expected to have full control of three coal mines in the Hunter Valley, Australia.
BHP Billiton has signed an agreement with Leighton Holdings to acquire HWE Mining subsidiaries, which provide contract mining services to BHP's Western Australia iron ore operations, for $735m.
Under the terms of the agreement, BHP will acquire the mining equipment, people and related assets that service Area C, Yandi and Orebody 23/25 operations, accounting for 70% of Western Australia Iron Ore's total material movement.
Vedanta Resources' subsidiary Sesa Goa has signed a definitive share purchase and operation agreement with Elenilto Minerals & Mining, to acquire 51% of Western Cluster for a cash sum of $90m.
Western Cluster, a subsidiary of Elenilto, is currently developing the Western Cluster iron ore deposits in Liberia.
Chinese firm SSC Mandarin of Hong Kong has agreed to buy Orkney gold mine from Pamodzi Gold R150m ($20.7m).
With this acquisition, SSC Mandarin will also inject more than R525m ($72.4m), for mine development and a new gold plant.
Republic Gold has completed the sale of its share in the Kangaroo Creek joint venture project in Queensland.
As part of the firm's strategy to review its options to farm-out or divest its Australian properties, the firm and Staldor Mining have entered into an option deed and sale agreement to dispose of the Kangaroo Creek tin project.