I found a lot of mine outside of the blue quest map area on the mountain range south of the island
963.04, 26.15, -769.53
448.43, 93.95, -736.81
476.35, 128.48, -720.03
466.11, 133.87, -698.60
492.39, 111.31, -702.37
592.33, 128.07, -608.89
585.00, 142.12, -568.66
596.42, 123.76, -557.46
640.75, 102.11, -417.49
644.74, 103.68, -414.10
634.17, 121.13, -334.43
610.29, 165.24, -351.46
454.29, 204.31, -631.05
593.75, 83.42, -809.32
636.63, 119.87, -783.98