General Information
Primary Commodities: coal
Aliases: Bonnet Plume Coal
Deposit Type(s): Coal
Location(s): 65.266940 N, -135.0050 W
NTS Mapsheet(s): 106E06
Location Comments: 1 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Discovered in 1977 by Pan Ocean Oil Ltd, which acquired the coal rights in Nov/77 as Coal Exploration Licences #83 and 88 and the mineral rights as Colt cl (YA37930) in Aug/78. Pan Ocean drilled 3 holes (341 m) in 1978 and 16 holes (3 121 m) in 1979, as well as carrying out stratigraphic, metallurgical and feasibility studies. The area was relicensed as #140 and #145 in Nov/80; as #372 and #377 in Nov/83; and as CYM0014 by P. Wheelton in Dec/2001.
Capsule Geology
Four coal seams are present in a Late Cretaceous sequence of conglomerate, sandstone and shale that forms the middle unit of the Bonnet Plume Formation. The coarse clastic rocks were laid down in wet alluvial fans and braided rivers while the associated silt, mud and coal were deposited in lacustrine, paludal and overbank flood plain environments and were preserved by rapid progradation of conglomeratic fluvial sequences.
The Illtyd deposit, which occurs in an east-plunging syncline that dips up to 20°, has been drill tested in an area 5 by 3 km. The deposit is cut off to the south by a fault. Drilling intersected 4 seams but only the upper 3 are sufficiently tested to be included in reserves. The upper (#1) seam averages 6.85 m thick, with conglomerate forming the hanging wall and shale in the footwall. The #2 seam lies 10 to 40 m below the #1 seam. It averages 3.7 m thick and has a shaly conglomerate hanging wall and a shale footwall. The #3 seam lies 10 to 20 m below the #2 seam and has an average thickness of 2.4 m and a shale and conglomerate hanging wall and shale footwall. The #4 seam lies 20 to 40 m below the #3 seam.
The coal has the following specifications: moisture 5.1%, ash 17.0%, volatiles 33.6%, fixed carbon 44.2%, sulphur <0.5%, specific energy 22 097 kJ/kg and ash fusion temp >1316°C. In-situ reserves were calculated as 120 930 000 tonnes measured, 29 210 000 tonnes indicated and 33 500 000 tonnes inferred. The owners consider these reserves to be adequate for 30 years of mine-mouth electric power generation.
References
ABERFORD RESOURCES LTD, Apr/82. Assessment Report *#092026 by J. McKinney.
ABERFORD RESOURCES LTD, Feb/83. Assessment Report *#062142 by G. Brown.
ABERFORD RESOURCES LTD, Feb/83. Assessment Report *#062143 by G. Brown.
AURUM GEOLOGICAL CONSULTANTS INC., 1994. Yukon Coal Inventory 1994. Energy and Mines Branch, Economic Development, Yukon Territorial Government, 169 p.
GEOLOGICAL SURVEY OF CANADA 1980. Open File 715.
GEOLOGICAL SURVEY OF CANADA 1986. Open File 1115.
GEOLOGICAL SURVEY OF CANADA Paper 76-8; P78-1A, p. 399-401.
MINERAL INDUSTRY REPORT 1978, p. 73.
NORRIS, D.K., ET AL., 1993. The geology, mineral and hydrocarbon potential of the Northern Yukon Territory and Northwestern District of Mackenzie. Geological Survey of Canada Memoir, in press.
PAN OCEAN OIL LTD, Feb/80. Assessment Report #061966 by O.R. Cullingham.
PAN OCEAN OIL LTD, Jan/81. Assessment Report #062055 by O.R. Cullingham et al.
PAN OCEAN OIL LTD, Feb/82. Assessment Report *#062114 by W.P. Stokes.
PAN OCEAN OIL LTD, Feb/82. Assessment Report *#062149 by G.R. Brown and W.J. Stephen.
Discovered in 1977 by Pan Ocean Oil Ltd, which acquired the coal rights in Nov/77 as Coal Exploration Licences #83 and 88 and the mineral rights as Colt cl (YA37930) in Aug/78. Pan Ocean drilled 3 holes (341 m) in 1978 and 16 holes (3 121 m) in 1979, as well as carrying out stratigraphic, metallurgical and feasibility studies. The area was relicensed as #140 and #145 in Nov/80; as #372 and #377 in Nov/83; and as CYM0014 by P. Wheelton in Dec/2001.
Capsule Geology
Four coal seams are present in a Late Cretaceous sequence of conglomerate, sandstone and shale that forms the middle unit of the Bonnet Plume Formation. The coarse clastic rocks were laid down in wet alluvial fans and braided rivers while the associated silt, mud and coal were deposited in lacustrine, paludal and overbank flood plain environments and were preserved by rapid progradation of conglomeratic fluvial sequences.
The Illtyd deposit, which occurs in an east-plunging syncline that dips up to 20°, has been drill tested in an area 5 by 3 km. The deposit is cut off to the south by a fault. Drilling intersected 4 seams but only the upper 3 are sufficiently tested to be included in reserves. The upper (#1) seam averages 6.85 m thick, with conglomerate forming the hanging wall and shale in the footwall. The #2 seam lies 10 to 40 m below the #1 seam. It averages 3.7 m thick and has a shaly conglomerate hanging wall and a shale footwall. The #3 seam lies 10 to 20 m below the #2 seam and has an average thickness of 2.4 m and a shale and conglomerate hanging wall and shale footwall. The #4 seam lies 20 to 40 m below the #3 seam.
The coal has the following specifications: moisture 5.1%, ash 17.0%, volatiles 33.6%, fixed carbon 44.2%, sulphur <0.5%, specific energy 22 097 kJ/kg and ash fusion temp >1316°C. In-situ reserves were calculated as 120 930 000 tonnes measured, 29 210 000 tonnes indicated and 33 500 000 tonnes inferred. The owners consider these reserves to be adequate for 30 years of mine-mouth electric power generation.
References
ABERFORD RESOURCES LTD, Apr/82. Assessment Report *#092026 by J. McKinney.
ABERFORD RESOURCES LTD, Feb/83. Assessment Report *#062142 by G. Brown.
ABERFORD RESOURCES LTD, Feb/83. Assessment Report *#062143 by G. Brown.
AURUM GEOLOGICAL CONSULTANTS INC., 1994. Yukon Coal Inventory 1994. Energy and Mines Branch, Economic Development, Yukon Territorial Government, 169 p.
GEOLOGICAL SURVEY OF CANADA 1980. Open File 715.
GEOLOGICAL SURVEY OF CANADA 1986. Open File 1115.
GEOLOGICAL SURVEY OF CANADA Paper 76-8; P78-1A, p. 399-401.
MINERAL INDUSTRY REPORT 1978, p. 73.
NORRIS, D.K., ET AL., 1993. The geology, mineral and hydrocarbon potential of the Northern Yukon Territory and Northwestern District of Mackenzie. Geological Survey of Canada Memoir, in press.
PAN OCEAN OIL LTD, Feb/80. Assessment Report #061966 by O.R. Cullingham.
PAN OCEAN OIL LTD, Jan/81. Assessment Report #062055 by O.R. Cullingham et al.
PAN OCEAN OIL LTD, Feb/82. Assessment Report *#062114 by W.P. Stokes.
PAN OCEAN OIL LTD, Feb/82. Assessment Report *#062149 by G.R. Brown and W.J. Stephen.
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1979 | Drilling: Diamond | Number of holes drilled: 16 Amount of work done: 3121 METRES |
| 1978 | Drilling: Diamond | Number of holes drilled: 3 Amount of work done: 341 METRES |
| 1978 | Geology: Bedrock Mapping | Measured stratigrapic sections. |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - platformal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup:
Group/Suite:
Formation: Bonnet Plume
Member:
Terrane:
Period Max: Cretaceous
Age Max: 120 MA
Period Min: Cretaceous
Age Min: 66 MA
Rock Major: shale/sandstone/conglo
Rock Minor:
Reference: Norris (1982) - GSC Map 1528A
Geological Unit (1M): KM
Geological Unit (250K): KM4
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 095826 | 2004 | Wind River Caolfield Assessment Report | Property Evaluation - Other | ||
| 062149 | 1982 | Summary of Environmental Programs Competed in 1981, and an Outline of Projects Planned for 1982 | Research/Summarize - Pre-existing Data, Environmental Assessment/Impact - Studies | ||
| 062143 | 1982 | Bonnet Plume 1982 Water Sampling Program | Environmental Assessment/Impact - Studies | ||
| 062142 | 1982 | Bonnet Plume 1982 Environmental Programmes | Environmental Assessment/Impact - Studies | ||
| 092026 | 1982 | A Brief for the Development of a Coal Fired Thermal Power Station to Supply to Electricity to the Yukon Territory | Feasibility - Studies | ||
| 062150 | 1981 | An Overview of the Vegetation, Wildlife and Fish Resources of the Bonnet Plume Lease, Northeastern Yukon Territory | Research/Summarize - Pre-existing Data, Biophysical Mapping - Studies, Environmental Assessment/Impact - Studies, Pre-feasibility - Studies | ||
| 062114 | 1981 | Preliminary Feasibility Mining Study Illtyd Creek Deposit Bonnet Plume Coalfield | Pre-feasibility - Studies | ||
| 062055 | 1980 | Report on Geology an Exploration of the Bonnet Plume Basin Yukon Territory | Diamond - Drilling, Bedrock Mapping - Geology, Regional Bedrock Mapping - Geology, Environmental Assessment/Impact - Studies, Resource Estimate - Studies | 53 | 10700 |
| 061966 | 1980 | Report on Geology an Exploration of the Bonnet Plume Basin Yukon Territory | Bedrock Mapping - Geology, Regional Bedrock Mapping - Geology, Resource Estimate - Studies | ||
| 061888 | 1979 | Report Reserves and Grade of Coal in the Bonnet Plume Basin | Feasibility - Studies, Preliminary Economic Assessment - Studies | ||
| 061889 | 1979 | Economic, Environmental & Socio-Economic Considerations | Environmental Assessment/Impact - Studies, Preliminary Economic Assessment - Studies | ||
| 061805 | 1979 | Report on the Geology of the Bonnet Plume Basin Yukon Territory as Determined by the 1978 Field Season | Bedrock Mapping - Geology, Regional Bedrock Mapping - Geology | ||
| 061807 | 1978 | Bonnet Plume Coalfield Tonnages and Grade of Coal in Support of a Proposed Thermal Generating Station in the Yukon Territory | Feasibility - Studies | ||
| 061806 | 1978 | Yukon Thermal Power Generating Study for Pan Ocean Oil Limited | Feasibility - Studies |
Drill Core at YGS Core Library
| Number | Property | Year Drilled | Core Size | Photos | Data |
|---|---|---|---|---|---|
| BP-79-17 | Illtyd | 1979 | HQ | 20 | 2 |
| BP-79-17A | Illtyd | 1979 | HQ | 22 | 2 |
