Outline on a map with names, scale, and the mineralized areas. Plot any dikes, veins or intrusive bodies on the map. Plot all samples collected on the map with sample numbers.
2. Mineralized Samples
Collect fist size or larger samples of mineralization (rock chips). What we are looking for are samples of all the types of mineralization. The higher grade the sample the better. We are interested in element ratios (not absolute values) so with the higher grade samples fewer elements are below the detection limit. These samples could include high-grade veins, low-grade disseminations, massive bodies, breccias, oxidized (red, yellow, brown, “rusty”, “earthy”, etc.), primary sulfides (pyrite, chalcopyrite, galena, etc), silicified (quartz), clay-rich (white), carbonaceous (black), etc. We need several samples of each. We can crudely do what we need to do with only one, but the evaluation becomes much better with more samples. Remember to plot the location of each sample, photograph the sample site, and write a description of each sample. If possible, collect a character sample of each (a small 2” by 2” sample for future reference). Orientation of faults, fractures, veins and is also important. Take strikes and dips if possible. Five samples of each mine area is the minimum number of samples.
3. Igneous Samples
Collect fist size or larger samples of any igneous rocks in the area. This would include the diabase, noted in the reports you gave us, and any other dikes or intrusions. They could range in color from black to white (gabbros or diabases to granites or rhyolites). They could be altered (silica or clay). Try to collect the “freshest” sample possible which usually is in a road cut. If possible, collect a character sample of each (a small 2” by 2” sample for future reference). Orientation of faults, fractures, and dikes is important. Take strikes and dips if possible. Three samples of each igneous body is the minimum number of samples.
4. Types of samples
Collect samples in the mining areas, outside the mining areas (especially igneous rocks), and drill core samples if available.