1. Gold in Devono-Carboniferous red beds of northern Britain
by John Parnell, John Still, Samuel Spinks, and David Bellis
Journal of the Geological Society
Volume 173(2):
March 1, 2016
© 2016 The Author(s)‏

2. Map of northern Britain and Ireland showing locations of red bed-hosted samples examined in this study.
Map of northern Britain and Ireland showing locations of red bed-hosted samples examined in this study.
John Parnell et al. Journal of the Geological Society 2016;173:
© 2016 The Author(s)‏

3. Backscattered electron (BSE) micrographs of reduction spheroids containing native gold, Millport: (a) core of reduction spheroid, containing mixture of iron oxides and native gold (bright) in a matrix of roscoelite; (b) close-up of core, showing gold particle (left field, bright) and nanometre-scale gold (arrowed) within roscoelite matrix.
Backscattered electron (BSE) micrographs of reduction spheroids containing native gold, Millport: (a) core of reduction spheroid, containing mixture of iron oxides and native gold (bright) in a matrix of roscoelite; (b) close-up of core, showing gold particle (left field, bright) and nanometre-scale gold (arrowed) within roscoelite matrix.
John Parnell et al. Journal of the Geological Society 2016;173:
© 2016 The Author(s)‏

4. Compositions (wt%) of gold crystallites, Millport, Isle of Cumbrae.
John Parnell et al. Journal of the Geological Society 2016;173:
© 2016 The Author(s)‏

5. LA-ICP-MS map for centre of reduction spheroid, North Berwick: (a) gold; (b) mercury; (c) tellurium.
LA-ICP-MS map for centre of reduction spheroid, North Berwick: (a) gold; (b) mercury; (c) tellurium. Contours represent orders of magnitude, increasing towards the centre. Map widths 3 mm.
John Parnell et al. Journal of the Geological Society 2016;173:
© 2016 The Author(s)‏

6. LA-ICP-MS maps for centres of reduction spheroids, for (a) gold, Cultra, and (b) tellurium, Millport.
LA-ICP-MS maps for centres of reduction spheroids, for (a) gold, Cultra, and (b) tellurium, Millport. Contours represent orders of magnitude, increasing towards the centre. Map widths, 3 mm.
John Parnell et al. Journal of the Geological Society 2016;173:
© 2016 The Author(s)‏