1. Creation of an atlas of lake-sediment geochemistry of Western Labrador and Northeastern Québec
by Stephen Amor, Martin McCurdy, and Robert Garrett
Geochemistry: Exploration, Environment, Analysis
Volume ():geochem
March 20, 2019
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

2. (a) Location of study area (cross-hatched).
(a) Location of study area (cross-hatched). (b) Sampling coverage. All of the indicated NTS sheets were sampled in their entirety except 14L, which was only sampled south of 58°30′N, 24P and 25A which were only sampled west of the provincial border. Mineral deposits discussed in the text are also indicated.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

3. Geology of study area and surrounds (from Amor et al. 2016).
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

4. Relief map of study area (defined as maximum–minimum contours intersected in each 10-km square cell).
Relief map of study area (defined as maximum–minimum contours intersected in each 10-km square cell).
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

5. (a) Unsmoothed Se values in lake sediment.
(a) Unsmoothed Se values in lake sediment. (b) The smoothed Se data are less noisy and regional features are more readily discerned.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

6. (a) Areal distribution of Co
(a) Areal distribution of Co. Labrador analyses were performed after multi-acid digestion (McConnell & Finch 2012), and Québec analyses after aqua-regia digestion.
(a) Areal distribution of Co. Labrador analyses were performed after multi-acid digestion (McConnell & Finch 2012), and Québec analyses after aqua-regia digestion. Correspondence between the two digestions is good. (b) Distribution of Ba, where cross-border correspondence is poor, indicating that some of the phases in which this element is hosted are resistant to aqua-regia digestion.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

7. Box-plots illustrating the relationship of selected elements to LOI
Box-plots illustrating the relationship of selected elements to LOI. (A) LOI ≤ 6.2%, (B) LOI 6.3–10.4%, (C) LOI 10.5–14.4%, (D) LOI 14.5–18.4%, (E) LOI 18.5–22.6%, (F) LOI 22.7–26.4%, (G) LOI 26.5–29.8%, (H) LOI 29.9–33.8%, (I) LOI 33.9–54%, (J) >54%.
Box-plots illustrating the relationship of selected elements to LOI. (A) LOI ≤ 6.2%, (B) LOI 6.3–10.4%, (C) LOI 10.5–14.4%, (D) LOI 14.5–18.4%, (E) LOI 18.5–22.6%, (F) LOI 22.7–26.4%, (G) LOI 26.5–29.8%, (H) LOI 29.9–33.8%, (I) LOI 33.9–54%, (J) >54%
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

8. Areal distribution of high- (>18.4%) and low-LOI samples.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

9. (a) Correlation coefficients for high-LOI sample pairs plotted against low-LOI sample pairs; Québec internal nearest neighbours with maximum separation of 5 km.
(a) Correlation coefficients for high-LOI sample pairs plotted against low-LOI sample pairs; Québec internal nearest neighbours with maximum separation of 5 km. Each point represents a different element (see Table 3); correlations for the two sediment types are not conspicuously different. (b) Correlation coefficients for Québec internal nearest neighbours plotted against cross-border nearest neigbours, all with maximum separation of 5 km. Each point represents a different element (See Table 3); correlation coefficients for internal nearest neighbours are slightly higher than for cross-border nearest neighbours. Open squares: LOI ≤ 18.4%; closed squares: LOI > 18.4%
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

10. (a) Example of an element (Sr in high-LOI samples) for which the correlation between cross-border pairs (closed circles, Spearman correlation coefficient 0.60) is better than between internal pairs (open circles, Spearman correlation coefficient 0.33).
(a) Example of an element (Sr in high-LOI samples) for which the correlation between cross-border pairs (closed circles, Spearman correlation coefficient 0.60) is better than between internal pairs (open circles, Spearman correlation coefficient 0.33). (b) Example of an element (Ca, low-LOI samples) for which the correlation between internal pairs (open circles, Spearman correlation coefficient 0.72) is better than between cross-border pairs (closed circles, Spearman correlation coefficient 0.49). X-axes: Québec analysis; Y-axes: Québec nearest-neighbour analysis (open circles), Labrador nearest-neighbour analysis (closed circles).
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

11. (a) Nearest-neighbour relationships for Ag between Québec and Labrador (High-LOI samples).
(a) Nearest-neighbour relationships for Ag between Québec and Labrador (High-LOI samples). (b) Nearest-neighbour relationships for Ag between Québec and Labrador (Low-LOI samples).
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

12. (a) Areal distribution of Ag in lake sediments (before levelling).
(a) Areal distribution of Ag in lake sediments (before levelling). (b) Areal distribution of Ag in lake sediments (after levelling). Unweighted linear regression, all cross-border samples separated by 5 km or less.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

13. (a) Nearest-neighbour relationships for Cd between 1997 and pre-1997 samples.
(a) Nearest-neighbour relationships for Cd between 1997 and pre-1997 samples. (b) Nearest-neighbour relationships for Hg between 1997 and pre-1997 samples.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

14. (a) Areal distribution of Cd before application of levelling equation.
(a) Areal distribution of Cd before application of levelling equation. (b) Areal distribution of Hg before application of levelling equation. (c) Areal distribution of Cd after application of levelling equation. (d) Areal distribution of Hg after application of levelling equation.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

15. Symbolic correlation matrix for combined Québec and Labrador dataset, after symmetric coordinate transformation.
Symbolic correlation matrix for combined Québec and Labrador dataset, after symmetric coordinate transformation. Elements where >10% of values are less than the analytical detection limit have been omitted from calculations.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

16. Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem2018-061
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

17. Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem2018-061
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

18. Distribution of Rb. Distribution of Rb.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

19. Distribution of Th. Distribution of Th.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

20. Distribution of S. Distribution of S.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

21. Distribution of La. Distribution of La.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

22. Distribution of U. Distribution of U.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

23. Distribution of Cu. Circles indicate Cu prospects and deposits.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

24. Distribution of Al. Distribution of Al.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

25. (a) Distribution of Sb. (b) Distribution of As. (c) Distribution of Bi
(a) Distribution of Sb. (b) Distribution of As. (c) Distribution of Bi. (d) Distribution of Re.
(a) Distribution of Sb. (b) Distribution of As. (c) Distribution of Bi. (d) Distribution of Re.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

26. (a) Distribution of Hf. (b) Distribution of Nb. (c) Distribution of Sn
(a) Distribution of Hf. (b) Distribution of Nb. (c) Distribution of Sn. (d) Distribution of Zr.
(a) Distribution of Hf. (b) Distribution of Nb. (c) Distribution of Sn. (d) Distribution of Zr.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG

27. (a) Distribution of Sb, with emphasis on values exceeding 90- and 97
(a) Distribution of Sb, with emphasis on values exceeding 90- and 97.5-percentiles.
(a) Distribution of Sb, with emphasis on values exceeding 90- and 97.5-percentiles. (b) Distribution of Zr, with emphasis on values exceeding 90- and 97.5-percentiles.
Stephen Amor et al. Geochemistry: Exploration, Environment, Analysis 2018;geochem
© 2019 The Author(s). Published by The Geological Society of London for GSL and AAG