Black Rock Mining Limited, formerly Green Rock Energy Limited, is an Australia-based graphite producer. The Company owns graphite tenure in the Mahenge region, Tanzania. Its segments include Graphite and Corporate. The Company's geographical segments include Tanzania and Australia. Its tenements include PL 7802/2012, Mehenge North, which covers an area of approximately 140 square kilometers; PL 10427/2014, Mehenge southwest, which covers an area of over 210 square kilometers; PL 10426/2014, Mehenge southeast, which covers an area of over 155 square kilometers, and PL 10111/2014, Makonde, which covers an area of over 25 square kilometers. Its Mahenge Project consists of approximately three graphite mineralized structures located within Exploration permit PL7802/2012: Epanko North, Ulanzi and Cascades. Its subsidiaries include Green Heat Resources Pty Ltd, Green Rock Geothermal Pty Ltd and Mahenge Resources Limited.