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I'll only provide some data about the mined gold: 9 t p.a. "Production in Asturia, Callaecia, and Lusitania (all Iberian Peninsula) alone." (Pliny: Naturalis Historia, 33.21.78, in: Wilson 2002, p. 27) 190t during whole "Roman Time" in Northwest Spain (I didn't see a specific time range in the paper) ...
The gold of Tolosa was a treasure in a lake where the celts offered many of their warprizes. However, in 105 BC, the proconsul of Cisalpine Gaul, Quintus Servilius Caepio, reported the discovery of the gold at Tolosa to the Senate, and was charged with sending the treasure back to Rome. Over 50,000 15 lb. bars of gold and 10,000 15 lb. bars of silver ...
The answer to your question is that these respective quantities are not known. Modern post-colonial historians routinely speak of how Britain, France, Belgium and other colonial powers looted their colonies by extracting their mineral resources. From this perspective the border between "looting" and "mining" does actually become rather fluid.
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