Element ratios

Element maps of thin sections 39208(2) and 39211 were selected for closer analysis of element ratios. 39208(2) shows potassic alteration whereas 39211 consists of a strongly propylitically altered granite breccia.

Figure 4-5 to Figure 4-22 below illustrate the results of the graphing of profile lines across the top, middle, and bottom of laser-mapped pyrite grains. For clarity, the mapped image shows Fe abundance in the grain, which gives the clearest view of the entire grain and its context in the groundmass. The lower graphs are ratio plots of cobalt-nickel or copper-molybdenum, while the upper graphs show individual comparisons between cobalt and nickel or copper and molybdenum. Cobalt-nickel ratios were chosen as a clear zonation pattern was evident in the initial element maps created from laser mapping data. Copper-molybdenum ratios were chosen to test the evidence from SLR’s (2016) voxel model (Figure 4-4) showing an increase in the Cu-Mo ratio towards the south east and the postulated source of mineralisation.

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Figure 4-4 Thin-sections were created from core selected from four drill holes, shown

here in relation to SLR’s (2016) Cu:Mo voxel model.

SLR’s work has shown that the ratio of molybdenum to copper in whole rock assays is observed to decrease away from mineralised veins, with copper disseminated more evenly through the deposit than molybdenum. The element maps shown for reference in the below figures use iron as the element that provides greatest definition between the sulphide grain and groundmass. Clear spikes are common in both single-element and ratio graphs corresponding to grain boundaries.

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Figure 4-5 Element graphs for cobalt and nickel in sample 39208(2) Profile 1. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for cobalt and nickel. The lower graph shows the Co:Ni ratio across the profile line.

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Figure 4-6 Element graphs for cobalt and nickel in sample 39208(2) Profile 2. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for cobalt and nickel. The lower graph shows the Co:Ni ratio across the profile line.

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Figure 4-7 Element graphs for cobalt and nickel in sample 39208(2) Profile 3. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for cobalt and nickel. The lower graph shows the Co:Ni ratio across the profile line.

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Figure 4-8 Element graphs for copper and molybdenum in sample 39208(2) Profile 1. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for copper and molybdenum. The lower graph shows the Cu:Mo ratio across the profile line.

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Figure 4-9 Element graphs for copper and molybdenum in sample 39208(2) Profile 2. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for copper and molybdenum. The lower graph shows the Cu:Mo ratio across the profile line.

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Figure 4-10 Element graphs for copper and molybdenum in sample 39208(2) Profile 3. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for copper and molybdenum. The lower graph shows the Cu:Mo ratio across the profile line.

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Figure 4-11 Element graphs for cobalt and nickel in sample 39211 Location 2 Profile 1. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for cobalt and nickel. The lower graph shows the Co:Ni ratio across the profile line.

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Figure 4-12 Element graphs for cobalt and nickel in sample 39211 Profile 2. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for cobalt and nickel. The lower graph shows the Co:Ni ratio across the profile line.

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Figure 4-13 Element graphs for cobalt and nickel in sample 39211 Profile 3. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for cobalt and nickel. The lower graph shows the Co:Ni ratio across the profile line.

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Figure 4-14 Element graphs for copper and molybdenum in sample 39211 Location 2 Profile 1. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for copper and molybdenum. The lower graph shows the Cu:Mo ratio across the profile line.

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Figure 4-15 Element graphs for copper and molybdenum in sample 39211 Location 2 Profile 2. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for copper and molybdenum. The lower graph shows the Cu:Mo ratio across the profile line.

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Figure 4-16 Element graphs for copper and molybdenum in sample 39211 Location 2 Profile 3. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for copper and molybdenum. The lower graph shows the Cu:Mo ratio across the profile line.

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Figure 4-17 Element graphs for cobalt and nickel in sample 39211 Location 3 Profile 1. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for cobalt and nickel. The lower graph shows the Co:Ni ratio across the profile line.

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Figure 4-18 Element graphs for cobalt and nickel in sample 39211 Location 3 Profile 2. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for cobalt and nickel. The lower graph shows the Co:Ni ratio across the profile line.

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Figure 4-19 Element graphs for cobalt and nickel in sample 39211 Location 3 Profile 3. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for cobalt and nickel. The lower graph shows the Co:Ni ratio across the profile line.

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Figure 4-20 Element graphs for copper and molybdenum in sample 39211 Location 3 Profile 1. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for copper and molybdenum. The lower graph shows the Cu:Mo ratio across the profile line.

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Figure 4-21 Element graphs for copper and molybdenum in sample 39211 Location 3 Profile 2. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for copper and molybdenum. The lower graph shows the Cu:Mo ratio across the profile line.

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Figure 4-22 Element graphs for copper and molybdenum in sample 39211 Location 3 Profile 3. The red line on the element map (left) indicates the profile line from which the values were exported. The upper graph shows single-element values for copper and molybdenum. The lower graph shows the Cu:Mo ratio across the profile line.

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