The explorer said these resources included 1.092Bt in the measured category and 1.816Bt indicated.

All of Kangaroo’s projects are located in the East Kalimantan region, covering coal quality types that range from low-rank thermal coal through to exportable semi-soft coking coal.

The Pakar thermal coal project reserves have been boosted by 381% from the previous statement, to 442 million tonnes.

Kangaroo’s wholly owned Mamahak coking coal project is one of its most promising.

Major Indonesian coal company PT Bayan Resources has signed an offtake agreement for up to 300,000 tonnes per annum of coal sales from this emerging open cut mine.

The Mamahak site holds 10.49Mt of resources, including 6.85Mt measured.

The energy value of this coal is 6991-7793 kilocalories per kilogram with 0.49-3.85% sulfur content on an air-dried basis, and crucible swelling numbers of 3.5 to 5.5.

Bayan is a major shareholder of Kangaroo and both companies aim to establish more synergies between their coal mining businesses.

Kangaroo shares are down 1c to 15.5c this morning, with the resource upgrades announced on Friday.