In your experience, which pathfinder better flags blind Carlin-style Au: As or Tl, and what anomaly cutoff would you use for resource evaluation? On our 2023 Nevada program, pXRF lit up 200–500 ppm As in halos, but lab ICP-MS showed Tl about 1–3 ppm neatly tracking ore shoots — which signal would you trust when prioritizing step-outs?