Fig. 1: Geological background and gold occurrences in pyrite from the Dakaitou deposit in Jiaodong gold province, China.
From: Hyperenrichment of gold in pyrite induced by solid-state transportation
a Simplified geologic map of the Linglong goldfield in Jiaodong gold province, China. Modified after ref. 12. b–d Backscattering scanning electron micrographs showing the occurrence of gold-bearing veinlets in the pyrite collected from the Dakaitou gold deposit. e SR-XCT three-dimensional distributions of gold-bearing veinlets in the Dakaitou pyrite (box size 35 μm × 20 μm × 35 μm). The sample used for SR-XCT analysis was cut using a focused ion beam in the zone marked by a dashed rectangle in d. The red arrows in e indicate gold-bearing islets in closed space and discontinuity of the veinlets in the pyrite. The numbers are the contrast intensity of the X-ray computed tomogram. The yellow, brown, and green colored zones denote pyrite, gold, and silver tellurosulfide. The marked focus ion beam cutting location shows the sampling position for further TEM observation in Fig. 2.
