By Maxwell Akalaare AdombilaDAKAR, Sept 8 (Reuters) - Democratic Republic of Congo plans to tighten control over geological data that guides billions of dollars in mining exploration, potentially extending state influence over the development of future mineral discoveries.The country is accelerating geological mapping, airborne surveys and digitisation of historical archives to build a comprehensive national geological databank on its critical minerals and reduce exploration risk, officials say.

The policy comes as competition intensifies between the United States and China for access to critical minerals.

The plan will tighten Kinshasa's grip on the world's biggest cobalt producer and second-largest copper supplier, according to an official and seven industry sources, and could be…