annexc - Newmont Mining Corporation

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Annex C3 – Geology and Geochemistry Supplemental Information C3 - 4 Pyrite is present in amounts that vary from 0 to 3 percent (visual estimates) and occurs in zones of both moderate and intense alteration. Pyrite typically occurs as euhedral grains along quartz vein selvages and along foliation planes of strongly foliated rock. Waste rock typically contains 1 to 1.5 percent and averages
Annex C3 – Geology and Geochemistry Supplemental Information C3 - 5 analyzed for: 1) mineralogy and whole-rock chemistry, i.e. metals, using semi-quantitative xray fluorescence, and 2) static acid-base accounting (ABA) parameters, including acid neutralization potential (ANP), acid generation potential (AGP), and net carbonate value (NCV). ABA tests evaluate the potential for rock to release acid and trace metals. Rocks can contain both sulfide minerals and carbonate minerals that affect release of acid and trace metals. Sulfide minerals are unstable in the presence of oxygen (air) and weather (oxidize) to sulfate, which produces acidity. Carbonate minerals can neutralize the acidity produced by weathering of the sulfide minerals. AGP represents the potential to produce acidity and is measured by analyzing total sulfur and residual sulfur after pyrolysis in the laboratory. ANP estimates the rock’s potential to neutralize acid and is measured by analyzing total carbon and hydrochloric acid insoluble carbon, i.e. any carbon other than carbonate minerals. NCV is the sum of ANP plus AGP. It provides an estimate of the net acid-base potential of the rock. Positive NCV indicates a net neutralizing potential, while negative NCV indicates a net acid-generating potential. The magnitude of the NCV provides an indication of the strength of the neutralizing or generating potential. NCV is typically reported as percent carbon dioxide. The U.S. Bureau of Land Management (US BLM 1996) and The Company use the following criteria for classifying rock by NCV. Criteria for NCV Classification Highly Acidic (HA) NCV < -5 % CO 2 Acidic (A) -5 < NCV < -1 % Slightly Acidic (SA) -1 < NCV 0.1 or AGP < -0.1) Inert (I) -0.1< NCV < 0.1 and (ANP < 0.1 and AGP > -0.1) Slightly Basic (SB) 0.1 < NCV < 1 Basic (B) 1< NCV < 5 Highly Basic (HB) 5 < NCV (Source: Bucknam 2002) The U.S. Bureau of Land Management (US BLM 1996) uses net neutralizing potential (NNP), in units of tons of calcium carbonate per 1,000 tons of waste rock (CaCO 3/1,000 tons), and ANP:AGP ratios to classify the acid generating potential of rock. If the US BLM NNP criteria are converted to percent CO 2 (%CO 2) (NNP/22.7 = NCV), then rock with an NCV less than -0.9 %CO 2 is considered to be acid generating and rock with an NCV greater than 0.9 %CO 2 is classified as non-acid generating. Rock with NCV in the range of -0.9 to 0.9 %CO 2 has an uncertain potential to generate acid. The US BLM criteria applied to the NCV classification above is roughly as follows: acid generating (HA and A), uncertain (SA, N, I, SB), and non acid generating (B and HB). Akyem Gold <strong>Mining</strong> Project November 2008 FINAL EIS
Page 1 and 2: A N N E X C SUPLEMENTAL INFORMATION
Page 3 and 4: Annex C1 - Flora and Fauna Species
Page 23 and 24: ANNEX C-2 AQUATIC RESOURCES SUPPLEM
Page 25 and 26: Annex C2 - Aquatic Resources Supple
Page 27 and 28: Annex C2 - Aquatic Resources Supple
Page 29 and 30: Annex C3 - Geology and Geochemistry
Page 31: Annex C3 - Geology and Geochemistry
Page 35 and 36: Drill Hole ID Core Interval (meters
Page 41 and 42: TABLE C3-5 (continued) Lithology Ke
Page 45 and 46: TABLE C3-7 Results of Synthetic Pre
Page 47 and 48: TABLE C3-7 (continued) Results of S
Page 49 and 50: TABLE C3-8 Results of Biological Ac
Page 51 and 52: TABLE C3-8 (continued) Results of B
Page 53 and 54: TABLE C3-9 (continued) Results of P
Page 55 and 56: TABLE C3-9 (continued) Results of P
Page 57 and 58: Annex C4 - Water Resources Suppleme
Page 59 and 60: Flow (m3/sec) 80 70 60 50 40 30 20
Page 63 and 64: Flow (m3/sec) 80 70 60 50 40 30 20
Page 67 and 68: Surface Water Statistic Afosu Strea
Page 73 and 74: Piper Diagram for Pra River and Tri
Page 75 and 76: Seep Water Statistic All Seep Sampl
Page 83 and 84:
Groundwater Elevation (meters re ms
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Groundwater Elevation (meters re ms
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Annex C4 - Water Resources Suppleme
Page 89 and 90:
Table C4-7 Groundwater Chemistry (2
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Surface Water Statistic Village Wel
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Surface Water Statistic Village Wel
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Groundwater Type Statistic Village
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Piper Diagram for Village Wells Aky
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Annex C5 - Soil Resources Supplemen
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Series BEKWAI NZIMA KOKOFU ODA TEMA
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Annex C6 -- Noise Supplemental Info
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Annex C6 -- Noise Supplemental Info
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ANNEX C-7 SOCIOECONOMICS SUPPLEMENT
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Annex C7 -- Socioeconomics Suppleme
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