3-130 130-1336 Conglomerate (Water Table 40m) Massive Limestone Poorly sorted quartz-lithic conglomerate with 4.5 Depth Geology Comments some metamorphic fragments (m) Massive Limestone with occasional vugs 0.1 0-2 Sandy Soil Friable showing calcite crystals. 2-120 Conglomerate Structure: Well interlocked undisturbed rock with cubical blocks. Appendix 1: Outcrop Rock Units & Geotechnical Summary Rock Type Red Sandstone Volcanic Group Massive Limestone Shale Porphyrite Conglomerate Description Poorly sorted clast supported quartz sandstone with a range of rounded to angular lithic fragments contained within the matrix. Andesite tuffs and flows formed in a phreatic environment. Rhyolite tuffs formed in a phreatic environment associated with plagioclase phenocrysts. Massive basaltic pillow lavas flows associated with chlorite alteration and intensely weathered at surface. Limestone containing calcite crystals in void space. Inter-bedded impermeable shale containing occasional calcite crystals derived from fossiliferous material. Phenocrysts of 17% Orthoclase, 33% Quartz, 30% Plagioclase, 10% Hornblende, 5% Biotite, 5% Muscovite, tr. Sulphides Poorly sorted quartz-lithic conglomerate with some metamorphic fragments of various natures contained within the matrix and clasts of shale, sandstone and limestone. Around the Porphyrite clasts include quartzite, marble, hornfels and quartz. Geotechnical Surfaces: Good, rough slightly iron stained weathered surfaces. Andesite Structure: Well interlocked undisturbed rock with cubical blocks. Andesite Surface: Moderately altered. Rhyolite Structure: Massive. Rhyolite Surface: Unweathered surfaces. Basalt Structure: Very Blocky Basalt Surface: Chloritic alteration. Structure: Very blocky, with many intersecting discontinuity joint sets. Surfaces: Smooth, calcite coated surfaces. Structure: Very blocky, with many intersecting discontinuity joint sets. Surfaces: Rough, calcite coated surfaces. Structure: Massive in situ rock with few discontinuities Surfaces: Rough slightly iron stained surfaces. Structure: Massive in situ rock with few discontinuities Surfaces: Rough slightly iron stained surfaces. 2790 3505 Schist 3505-3550 Gneiss Drilling Company: Rocket Drill Dip: -90 RL: 480m Drill Recovery: Chips/Core Hornfels 1336-1554 Shale (including Oil Shale) Inter-bedded impermeable shale containing trilobite material, 0.005 (Water table 110m) 120-950 Massive Limestone Includes 10 m of Oil Shale above the coal with Organic Carbon Content 27%. 950-1365 Shales 1554-1560 1560-1680 Coal Shales Bituminous Coal 0.01 Poorly sorted quartz-lithic conglomerate with some metamorphic fragments Massive Limestone with occasional vuga showing calcite crystals. Inter-bedded impermeable shale containing trilobite material. Permeability 705-1450 Red Sandstone (mD) Poorly sorted clast supported quartz sandstone 10.5 with a range of rounded to angular lithic fragments 1450-1520 Volcanic Group 4.5 0.1 Dark fine grained igneous rock with 50% Mafic, 0.001 45% Plagioclase and 5% Quartz. Drilling Company: Rocket Drill Dip: -90 RL: 675m Drill Rig: Austin 1800 Grid: Local Collar: 6m Total Depth: 2500 m Drill Recovery: Chips/Core Depth Geology Comments Permeability (m) (mD) 0.005 Fine grained igneous rocks with 25% Qtz, 35% Orthoclase, 10% Plagioclase and 30% Fine grained groundmass. 0.001 0-3 2-301 Sandy Soil Friable 9 Conglomerate Poorly sorted quartz-lithic conglomerate with 4.5 Inter-bedded impermeable shale containing graptolite material. 0.005 1680-2790 Red Sandstone Poorly sorted clast supported quartz sandstone 5.7 with a range of rounded to angular lithic fragments 1365-1373 Oil Shale 1373-1377 Coal 1377-1505 Hornfels 1505-2240 Quartzite 2240-2370 Volcanic Group Oil Shale with Organic Carbon Content 25%. Anthracite 1520 1540 Phyllite 0.01 1540-1970 Schist Chlorite Mica Phyllite with foliation 50 ● W 0.01 Greenschist associated with albite, actinolite and 0.02 30-150 (Water Table 190m) Massive Limestone some metamorphic fragments Massive Limestone with occasional vuga 0.1 0.005 showing calcite crystals. Inter-bedded impermeable hornfels 0.001 1970-2050 Gneiss Quartz rich with minor lithic fragments 0.01 epidote. Schistosity dipping 500 W Almandine gamet gneiss. Gneissic Banding dipping 50 ● W 0.001 150-170 150 180 Marble Marble with occasional garnet crystals 0.2 Hornfels Greenschist associated with albite, actinolite and epidote. Schistosity dipping 40 ESE Almandine garnet gneiss. 0.02 Dark fine grained igneous rock with 50% Mafic, 45% Plagioclase and 5% Quartz. 0.001 180 187 187 505 505-720 Coal Hornfels Quartzite Inter-bedded impermeable hornfels. Anthracite Inter-bedded impermeable hornfels. 0.005 0.005 0.001 0.001 Quartz rich with minor lithic fragments. Gneissic Banding dipping 45 ● ESE Fine grained igneous rocks with 25% Qtz, 35% Orthoclase, 10% Plagioclase and 30% Fine grained groundmass. Bore 5 0.001 720-2370 Porphyrite Phenocrysts of 17% Orthoclase, 33% Quartz, 0.01 0.001 30% Plagioclase, 10% Hornblende, 5% Biotite, Collar Details 5% Muscovite, tr. Sulphides Borehole Hole 2 From/To | 0-3 3-80 Drill Rig: Austin 1800 Grid: Local Collar: 6m Total Depth: 1550m Comments 2370-2400 Slate 2400-2700 Chloritic Schist 40 NW 0.02 Phyllite 2700 3100 Schist Chlorite Mica Phyllite with foliation 40 ● NW Greenschist associated with albite, actinolite and 0.02 epidote. Schistosity dipping 400 NW 0.01 Drilling Company: Down the Earth Drill Rig: RC Rig RL: 150m Dip: -90 Grid: Local Drill Recover: Chips Collar: 6m Total Depth: 2050m 2370-2400 Gneiss Almandine garnet gneiss. 0.001 Anticline plunging North with limbs dipping 60 NW and 60 NE Depth 3100-3150 Gneise Sandy Soil Geology Permeability (mD) Friable 8 Conglomerate 280-350 (Water Table 70m) Marble Poorly sorted quartz-lithic conglomerate with some metamorphic fragments 4.0 350-375 Graphitic Hornfels 375-380 Coal Marble with occasional garnet crystals. Inter-bedded hornfels with fossil imprints Anthracite 0.15 Collar Details 0.005 0.02 Drilling Company: Down the Earth Dip: -90 Drill Rig: RC Rig RL: 330m Grid: Local 380-5501 Inter-bedded impermeable hornfels. 0.007 Drill Recovery: Chips/Core Collar: 6m 550 1480 Quartzite 1480-1550 Volcanic Group Massive rocks with occasional lithic fragments Dark fine grained igneous rock with 50% Mafic, 45% Plagioclase and 5% Quartz. Total Depth: 2050m 0.004 Comments Almandine gamet gneiss. Gneissic Banding dipping 45 NW 0.001 (m) 0-3 3-150 Geology Sandy Soil Comments Permeability (mD) 2400-2500 Porphyrite Phenocrysts of 17% Orthoclase, 33% Quartz, 0.001 Friable Borehole 4 150-280 Appendix 2: Drilling Logs Borehole 1 Drilling Company: Rocket Drill Dip: -90 RL: 420m Drill Recovery: Chips/Core Drill Rig: Austin 1800 Grid: Local Collar: 6m Total Depth: 3550 m Depth (m) Geology Comments Permeability (m-D) | 0-3 Sandy Soil Friable 1480-1550 Gneiss Fine grained igneous rocks with 25% Qtz, 35% Orthoclase, 10% Plagioclase and 30% Fine grained groundmass. Almandine garnet gneiss. Gneissic Banding dipping 45 ● East Borehole 3 Drilling Company: Rocket Drill Dip: -90 RL: 610m Drill Recovery: Chips/Core Drill Rig: Austin 1800 Grid: Local Collar: 6m Total Depth: 3150 m Borehole 6 Inter-bedded impermeable shale containing trilobite material. 0.005 Includes 12m of Oil Shale with Organic Carbon Content 30% above the coal. 280 288 288-490 Coal Shale Bituminous Coal 0.01 Inter-bedded impermeable shale containing graptolite material. Collar Details Drilling Company: Down the Earth Drill Rig: RC Rig Dip: -90 RL: 580m Drill Recovery: Chips/Core 0.001 490-1210 Red Sandstone Poorly sorted clast supported quartz sandstone 12 Depth- Geology Permeability (m) (mD) with a range of rounded to angular lithic fragments Depth (m) Geology Grid: Local Collar: 6m Total Depth: 3430m Comments Permeability (mD) 0-1 Sandy Soil Friable 0-1 Sandy Soil Friable 1-350 Massive Limestone 0.001 350 480 (Water Table 25m) Shales Massive Limestone with occasional vuga showing calcite crystals. 9 0.1 1210-13201 Volcanic Group Dark fine grained igneous rock with 50% Mafic, 45% Plagioclase and 5% Quartz. 0.001 1-550 550-580 Massive Limestone (Water Table 150m) Shales showing calcite crystals. Massive Limestone with occasional vuga 9 0.1 Inter-bedded impermeable shale containing 0.005 Inter-bedded impermeable shale containing trilobite material. 0.005 480 488 Coal Includes 8m Oil Shale with Organic Carbon Content 30% above the coal. Bituminous Fine grained igneous rocks with 25% Qtz, 35% Orthoclase, 10% Plagioclase and 30% Fine grained groundmass. trilobite material. 0.001 Includes 9m of Oil Shale with Organic Carbon Content 32% above the coal 1540-1970 Schist 0.01 Greenschist associated with albite, actinolite and 0.02 epidote. Schistosity dipping 450 E 580 588 Coal Bituminous Coal 0.01 588 1505 Shale Inter-bedded impermeable shale containing 0.001 488 705 Shale Inter-bedded impermeable shale containing graptolite material. 0.001 1970-2050 Gneiss Almandine gamet gneiss. Gneissic Banding dipping 45 ● E 0.001 graptolite material. 1505-2950 Red Sandstone with a range of rounded to angular lithic fragments Poorly sorted clast supported quartz sandstone 9.5 Massive Limestone (Water Table 150m) Shales Massive Limestone with occasional vuga showing calcite crystals. 9 0.1 30% Plagioclase, 10% Hornblende, 5% Biotite, 5% Muscovite, tr. Sulphides Borehole 7 Borehole 9 Collar Details Drilling Company: Down the Earth RL: 330m Drill Recovery: Chips/Core 2950-3020 Volcanic Group Dark fine grained igneous rock with 50% Mafic, 45% Plagioclase and 5% Quartz. 0.001 Fine grained igneous rocks with 25% Qtz, 35% Orthoclase, 10% Plagioclase and 30% Fine grained groundmass 0.001 3020-3300 Schist Greenschist associated with albite, actinolite and epidote. Schistosity dipping 500 SSE 0.02 Dip: -90 3300-3430 Gneiss Almandine garnet gneiss. 0.001 Drill Rig: RC Rig Grid: Local Collar: 6m Total Depth: 2150m Comments 788-1705 Shale Inter-bedded impermeable shale containing graptolite material. 0.001 1705-3050 Red Sandstone Poorly sorted clast supported quartz sandstone 9.5 with a range of rounded to angular lithic fragments 3050-3150 Volcanic Group Dark fine grained igneous rock with 50% Mafic, 0.001 45% Plagioclase and 5% Quartz. Fine grained igneous rocks with 25% Qtz, 35% 0.001 Gneissic Banding dipping 50 ● SSE Depth Geology Permeability Orthoclase, 10% Plagioclase and 30% Fine (m) (mD) grained groundmass. Borehole 8 0-1 Sandy Soil Friable 9 3150-3400 Slate Chloritic Schist 50 SE 0.02 1-150 Massive Limestone Collar Details Drilling Company: Down the Earth Dip: -90 RL: 580m Drill Recovery: Chips/Core (Water Table 8 Massive Limestone with occasional vuge showing calcite crystals. 0.1 3400-3530 3530-3660 Phyllite Chlorite Mica Phyllite with foliation 50 SE 0.01 Schist Greenschist associated with albite, actinolite and 0.02 Depth Geology Drill Rig: RC Rig Grid: Local Collar: 6m Total Depth: 2400m Comments 150-250 Marble Marble with occasional garnet crystals 02 epidote. Schistosity dipping 500 SE 250-380 380 388 388-705 Hornfels Coal Hornfels Inter-bedded impermeable hornfels. Anthracite 0.005 3660-3800 Gneiss Almandine garnet gneiss. 0.001 0.01 Gneissic Banding dipping 50 ● SE Inter-bedded impermeable hornfels. 0.005 |710 1440 Quartzite Quartz rich with minor lithic fragments. 0.01 Permeability 1440-1520 Porphyrite Phenocrysts of 17% Orthoclase, 33% Quartz, 0.001 (m) (mD) 0-1 Sandy Soil Friable 9 30% Plagioclase, 10% Hornblende, 5% Biotite, 5% Muscovite, tr. Sulphides 1-250 Massive Limestone (Water Table 130m) Massive Limestone with occasional vugs showing calcite crystals. 0.1 0.001 250-280 Shales Inter-bedded impermeable shale containing 0.005 trilobite material. Includes 7m of Oil Shale with Organic Carbon Content 29%. 515-1250 264-272 272-515 Coal Shale Red Sandstone Bituminous Coal 0.01 1520 1640 Phyllite 1640-2070 Schist 2070-2150 Gneiss Gneissic Banding dipping 45 ● NE Chlorite Mica Phyllite with foliation 45 ● NE 0.01 Greenschist associated with albite, actinolite and 0.02 epidote. Schistosity dipping 45 NE Almandine garnet gneiss. 0.001 Inter-bedded impermeable shale containing 0.001 graptolite material. Poorly sorted clast supported quartz sandstone 9.5 Borehole 10 with a range of rounded to angular lithic fragments 1250-1350 1350-1645 Quartzite Porphyrite Quartz rich with minor lithic fragments. 0.01 Phenocrysts of 17% Orthoclase, 33% Quartz, 0.001 30% Plagioclase, 10% Hornblende, 5% Biotite, 5% Muscovite, tr. Sulphides Collar Details Drilling Company: Down the Earth Dip: -90 RL: 660m Drill Recovery: Chips/Core 1645-1800 Volcanic Group Metamorphosed dark fine grained igneous rock 0.001 with 50% Mafic, 45% Plagioclase and 5% Quartz. Depth Geology Drill Rig: RC Rig Grid: Local Collar: 6m Total Depth: 3800m Comments Permeability (m) (mD) 0-1 Sandy Soil Friable 9 0.001 Fine grained igneous rocks with 25% Qtz, 35% 1-750 Massive Limestone Massive Limestone with occasional vuga 0.1 Orthoclase, 10% Plagioclase and 30% Fine (Water Table 130m) showing calcite crystals. grained groundmass. 750-780 Shales Inter-bedded impermeable shale containing 0.005 1800-2000 Schist Greenschist associated with albite, actinolite and epidote. Schistosity dipping 500 E 0.02 trilobite material. 2000-2400 Gneiss Almandine garnet gneiss. Gneissic Banding dipping 50 ● E 0.001 780-788 Coal Includes Oil Shale with Organic Carbon Content 30% Bituminous 0.01 N 2 + 400- CONGLOMERATE 500 + MASSIVE HALES RED SANDSTONE SHALES F MASSIVE LIMESTONE Fz 25 LIMESTONE 600· -600- 65 B Legend 8 115 20 40V V ↑30 Red Sandstone Volcanic v Group Massive Limestone Shales Porphyrite Conglomerate □□□ Borehole 160 -m Metamorphic Auriole F = fault. Countours: 100 ༽7” Creek Flow is the equivilant of 75 1000 metres Figure 1: Windy Hill Geology Map (note the rocks listed are not in order and those at depth are not included in the legend but should be included on the Geological Column and History as found in Appendix 2.). 2000
An existing oil shale extraction company wants to extract coal from the Windy Hill region after conducting 10
exploratory bore holes. It has been discovered that there is an association between the basement geology,
intrusions and the oil shale to produce high grade coking coal – anthracite - in the Windy Hill region.
In order to extract this oil shale and coal, a rough estimate of the volume of the deposits needs to be found below
the water table.
An initial application with the government environmental department for mining the resource areas have
enforced an exclusion on mining around the following:
• Within 1km of any overland water flow;
• Within aquifers that drain directly into the overland water flow at depth.
In order to progress the mining operation, the company is seeking to identify ground water flow based on the
geology map and the drilling data.
Task. Oil Shale, Coal Resource Estimate and Environmental Water Constraints
Estimate the volume of the geological oil shale and coal resource based on the geological modelling that has
been undertaken for the Windy Hill region (Appendix 2). While this will be only an initial rough estimate,
assumptions should be detailed, such as the economic depth of the resource, mining technique(s) employed
and minimum oil shale and coal seam thicknesses. Separate the coal into bituminous and anthracite.
Estimate the tonnage to be removed and include an overall tonnage for each rock type. This includes
researching typical densities for the material removed.
Identify areas that are not permissible to mine due to the presence of ground water aquifers that directly flow
to the overland water areas.
Consider the role that rehabilitation takes and outline the key components of rehabilitation and when these
components of rehabilitation should occur.
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