Investors with a combined $12.5 trillion in assets could review their stakes in resource companies that use storage dams if they do not release information to assess safety risks.
Numerous reports from state-run Chinese media have raised the prospect that China may limit its supplies of the minerals to gain leverage in its trade dispute with the US.
Informal methods of gold production, known as "artisanal" or small-scale mining, have grown rapidly in recent years as demand for gold has boomed, pushing prices higher.
Barrick must either firm up its proposal to acquire the 36.1% of Acacia it does not own by June 18, or walk away for at least six months under British takeover law.
The Canadian miner is moving full-speed with construction of its Kakula — the stage one, six-million-tonne-per-annum (6 Mtpa) operation — that is part of the vast Kamoa-Kakula copper mining complex.