Miner Bushveld Minerals, which owns iron ore and tin assets in southern Africa, disappointed investors on Tuesday with a revised timetable for its project platforms.Based on operational activity since the start of 2014, the AIM-listed has decided to push back many of its target dates for project development across the portfolio.Chief Executive Fortune Mojapelo said that the announcement was made "in support of transparent disclosure to all stakeholders"."While there are delays expected, they result from factors beyond the control of the company, or the need to incorporate recent developments in the project, such as the potential acquisition of the Zaaiplaats tailings project. "As a management team, we remain confident in the fundamentals of each of our projects and our approach to their development. We look forward to updating the market accordingly."The stock was down nearly 10% at 3.33p by 15:00.BC