General Information
Secondary Commodities: asbestos, copper, zinc
Aliases: Mark, Spruce
Deposit Type(s): Ultramafic-hosted asbestos
Location(s): 60.964720 N, -130.037780 W
NTS Mapsheet(s): 105B16
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Discovered in 1967 by Frances Magun while on a hunting trip. Staked as Mark cl 4-5 (Y22890) in May/68 by B. Studer and examined by Dome Petroleum Ltd the following July during a brief option.
Restaked as Spruce cl 1-2 (YA67222) in Sep/81 by L. Desbiens and as Bill's cl (YB15134) in Aug/88 by V. Krickbaum, who prospected in 1989, and added the Chris cl (YB33290) and Dawn cl (YB33291) in Aug/90. The Chris and Dawn claims were allowed to lapse in 1991.
V. Krickbaum prospected and sampled Bill's cl in 1991, added the Laura-Chris cl (YB35007) and Sarah-Dawn cl (YB35008) in Aug/92 and transferred a half share in all three claims to R. Krickbaum. V. Krickbaum and R. Krickbaum stripped ground on the Laura-Chris and Sarah-Dawn claims in Aug/93 and mapped and sampled in Aug/94.
In Jan/96 Cominco Ltd staked BL cl 1-56 (YB72555) 2 km to the northwest. In May/96 V. Krickbaum staked 7 Jesse claims (1=YB83032) around the occurrence. In Jun/96 Cominco surrounded Krickbaum¿s claim group with Bl cl 57-93 (YB84117). Cominco carried out geological mapping and soil and silt sampling programs in 1996 and 1997.
Capsule Geology
The area has not yet been re-mapped by the Yukon Geology Program however work completed by Cominco suggests the area is underlain by a sequence of Upper Devonian to Early Mississippian metasediments. In the east the sequence is intruded by massive, magnetic serpentinite bodies while to the west the sequence is intruded by a two mica granite.
The original occurrence consists of small lenses of spiky slip fibre asbestos in a sheet-like body of serpentinite and peridotite. The ultramafic bodies are cut by small, irregular bodies of gabbroic pegmatite and amphibolite. The fibre zones are less than 1 800 tonnes in size and consist of light green amphibole fibre up to 15 cm and averaging 2.5 to 5 cm in length. The gabbro contains up to 5% disseminated pyrrhotite but no copper or nickel. Several minor chrysocolla-chalcocite showings, each less than 0.25 square metres, were observed but not assayed.
Cominco staked the BL claims for their volcanogenic massive sulphide potential. Silt and contour soil sampling completed by Cominco identified a few single sample Cu (up to 167 ppm) and Zn (up to 425 ppm) anomalies scattered throughout the Bl claims. Follow-up sampling failed to identify any economic targets.
References
COMINCO LTD, Apr/98. Assessment Report #093861 by V.L. Bannister and R.W. Holroyd.
COMINCO LTD, Apr/97. Assessment Report #093883 by D. Senft.
DOME PETROLEUM LTD, Jul/68. Assessment Report #018618 by K.D. Watson.
Discovered in 1967 by Frances Magun while on a hunting trip. Staked as Mark cl 4-5 (Y22890) in May/68 by B. Studer and examined by Dome Petroleum Ltd the following July during a brief option.
Restaked as Spruce cl 1-2 (YA67222) in Sep/81 by L. Desbiens and as Bill's cl (YB15134) in Aug/88 by V. Krickbaum, who prospected in 1989, and added the Chris cl (YB33290) and Dawn cl (YB33291) in Aug/90. The Chris and Dawn claims were allowed to lapse in 1991.
V. Krickbaum prospected and sampled Bill's cl in 1991, added the Laura-Chris cl (YB35007) and Sarah-Dawn cl (YB35008) in Aug/92 and transferred a half share in all three claims to R. Krickbaum. V. Krickbaum and R. Krickbaum stripped ground on the Laura-Chris and Sarah-Dawn claims in Aug/93 and mapped and sampled in Aug/94.
In Jan/96 Cominco Ltd staked BL cl 1-56 (YB72555) 2 km to the northwest. In May/96 V. Krickbaum staked 7 Jesse claims (1=YB83032) around the occurrence. In Jun/96 Cominco surrounded Krickbaum¿s claim group with Bl cl 57-93 (YB84117). Cominco carried out geological mapping and soil and silt sampling programs in 1996 and 1997.
Capsule Geology
The area has not yet been re-mapped by the Yukon Geology Program however work completed by Cominco suggests the area is underlain by a sequence of Upper Devonian to Early Mississippian metasediments. In the east the sequence is intruded by massive, magnetic serpentinite bodies while to the west the sequence is intruded by a two mica granite.
The original occurrence consists of small lenses of spiky slip fibre asbestos in a sheet-like body of serpentinite and peridotite. The ultramafic bodies are cut by small, irregular bodies of gabbroic pegmatite and amphibolite. The fibre zones are less than 1 800 tonnes in size and consist of light green amphibole fibre up to 15 cm and averaging 2.5 to 5 cm in length. The gabbro contains up to 5% disseminated pyrrhotite but no copper or nickel. Several minor chrysocolla-chalcocite showings, each less than 0.25 square metres, were observed but not assayed.
Cominco staked the BL claims for their volcanogenic massive sulphide potential. Silt and contour soil sampling completed by Cominco identified a few single sample Cu (up to 167 ppm) and Zn (up to 425 ppm) anomalies scattered throughout the Bl claims. Follow-up sampling failed to identify any economic targets.
References
COMINCO LTD, Apr/98. Assessment Report #093861 by V.L. Bannister and R.W. Holroyd.
COMINCO LTD, Apr/97. Assessment Report #093883 by D. Senft.
DOME PETROLEUM LTD, Jul/68. Assessment Report #018618 by K.D. Watson.
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1997 | Other | Work carried out on BL claims. |
| 1996 | Geochemistry: Silt | |
| 1996 | Geochemistry: Soil | |
| 1996 | Geology: Bedrock Mapping | |
| 1994 | Geology: Bedrock Mapping | |
| 1994 | Other | |
| 1993 | Other | Work carried out on Laura-Chris and Sarah-Dawn claims. |
| 1991 | Other | Work carried out on Bill's claim. |
| 1991 | Other | Work carried out on Bill's claim. |
| 1989 | Other |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Fire Lake
Formation:
Member:
Terrane: Yukon-Tanana
Period Max: Devonian
Age Max: 365 MA
Period Min: Devonian
Age Min: 357 MA
Rock Major: serpentinite
Rock Minor:
Reference: Murphy (2000) - YGS OF 2000-16
Geological Unit (1M): DMF
Geological Unit (250K): DMF6
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 094793 | 2005 | Grassroots Prospecting Exploration | Prospecting - Other | ||
| 095287 | 2004 | 2003 Crystal Valley Project Geological Survey Prospecting and Mapping of the Jesse 1-5, 7-14, Dawn 17-70, Bill's, Sarah-Dawn and Laura Claims | Rock - Geochemistry, Soil - Geochemistry, Water - Geochemistry, Regional Bedrock Mapping - Geology, Prospecting - Other | ||
| 094458 | 2003 | Assessment Report Describing Geology, Mineralization and Geochemistry on the Four Corners Property | Silt - Geochemistry, Soil - Geochemistry, Regional Bedrock Mapping - Geology | ||
| 093883 | 1996 | 1996 Assessment Report Wat and BL Properties Geological Mapping and Soil Geochemistry | Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology | ||
| 018618 | 1968 | Prelininary Report, Studer Option | Detailed Bedrock Mapping - Geology, Prospecting - Other |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC013451 | Property submission: Studer option 105B-16 | Report | |
| ARMC019016 | Field map of Wolf Lake showing heavy mineral sample sites - 105B Grass Lakes project | Geoscience Map (General) |
| Citations |
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