Blackstone Minerals announced that it has appointed experienced business development and investor relations executive Patrick Chang as Corporate Development Officer. Mr. Chang was previously Corporate Development Officer with Medusa Mining for two years. He was responsible for identifying, evaluating and executing business development opportunities, along with managing investor relations. Prior to joining Medusa, he spent more than seven years working at Argonaut and Canaccord Genuity as a resources analyst, specialising in the precious metals and nickel sectors.