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Mineral Assessment of the Tombstone Study Area, Yukon
A mineral assessment of the Tombstone study area was undertaken by the Department of Economic Development in the summer of 1998 at the request of the Department of Renewable Resources. The purpose of the mineral assessment was to produce a mineral potential map, which was to be used to assist with the finalization of the boundaries of the Tombstone Territorial Park. Following an initial compilation, a field program was designed to document known mineral occurrences, test and improve the existing regional mapping, investigate geochemical anomalies, characterize favourable environments for mineralization, sample for lithogeochemistry, and prospect for mineralization. A field program resulted in the discovery of several new mineral occurrences, as well as the discovery of previously unmapped geological formations. Fieldwork was followed by a compilation phase that integrated the new information to the existing geoscientific data. The geology of the study area was subdivided into thirteen geological tracts. A panel of five industry and government experts, familiar with the geology, mineral occurrences and mineral deposit types to be found in the area, was convened in June 1999. Based on the final compilation and their expertise, they produced a relative ranking of all the tracts according to their potential to host mineral deposits, from highest potential to lowest. The highest-ranking tracts are those that include, or are near the Cretaceous intrusions (Tombstone, Mount Brenner and smaller intrusions) and have strong potential for intrusion-hosted (Fort Knox-type, porphyry uranium, skarn) and intrusion-related (skarns, veins, replacement) mineralization. Other tracts demonstrate potential for Wernecke Breccia, shale-hosted nickel sulphide, ultramafic-hosted nickel and listwaenite, Carlin-type, Mississippi Valley-type or replacement lead-zinc, as well as volcanogenic mineralization. A final boundary was adopted in December 2000; it includes land outside of the original study area. This final boundary therefore includes areas that were not assessed in this study. All our wildlife sightings were documented and were included in the subsequent wildlife survey.
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Proposed Tombstone Area Park: A Preliminary Review of Mineral Potential (116B)
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Although the first claims in the Tombstone area were staked in 1901, most exploration to date has focused on high grade veins, skarns and uranium deposits, and pre-dates the search for bulk tonnage gold or shale-hosted nickel. Early reconnaissance geochemical programs by mining companies analysed a very limited range of elements, and assessment work on file covers only a small part (3.6%) of the study area. Recent GSC stream sediment geochemistry shows that compared to the rest of the Dawson map sheet area, the Tombstone area contains highly anomalous gold, copper, molybdenum, tungsten, uranium, copper and rare earth values clustered around the Tombstone Suite intrusions, and anomalous nickel, copper, cobalt, chromium, zinc, iron and rare earth elements associated with a belt of Earn Group shale north of the proposed park. Known mineral deposits in the area include the Marn deposit (Minfile 116B 147), a small, high-grade gold skarn, and the Tombstone deposit (Minfile 116B 151), a very large, low-grade uranium resource with no published reserves. The entire tinguaite phase of the Tombstone Stock averages 78 pp, U (Olade and Goodfellow, 1978), with a number of high grade zones containing up to 2% U3O8. High grade silver veins on the south side of Tombstone Mountain were mined briefly in 1920 (Spotted Fawn, Minfile 116B057) but smelter results were not available.
Mineral Industry Report 1975
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This report is a review of the Yukon mineral industry for 1975 by the Geology Section, Northern Natural Resources and Environment Branch, Department of Indian and Northern Affairs. It includes descriptions of work conducted on mineral claims by individuals and mineral exploration companies and operating summaries of the several producing mines in the Yukon. It also contains technical papers on select properties. Information in this report was obtained from visits to mineral properties, from personal communication with individuals and from technical reports, trade journals, newspapers, publications of the Geological Survey of Canada and the monthly reports of the District Mining Recorders. A list of assessment reports, both confidential and those available for inspection, is included in the list of Technical Reports. In this report, activities of the mineral industry are divided into lode mining and exploration, coal mining and exploration and placer mining.
Mineralogical Analysis of Ore Specimens from the Rare Earth Deposits of Dodgex (Part 1 and Part 2)
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A mineralogical study was conducted by the Applied Mineralogy Group on a niobium-bearing rare earth ore from the Lancer deposit in Yukon as a cost recovery project for Mr. Dodge, President Dodgex Ltd. The study was conducted in two parts. One part is to identify the minerals and to determine the compositions and modes of occurrence of rare earth minerals, and the second part is to determine the relative quantities of the rare earth minerals and to determine their liberation characteristics.
Mineral Industry Report 1978
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This report is a review of the Yukon mineral industry for 1978 by the Geology Section, Yukon, Northern Affairs Program, Department of Indian and Northern Affairs. It includes descriptions of work conducted on mineral claims by individuals and mineral exploration companies and operating summaries of the several producing mines in the Yukon. Information in this report was obtained largely from the geological, geochemical and geophysical reports accepted for credit as assessment work by the Department of Indian and Northern Affairs. A list of assessment reports, both confidential and those available for inspection, is included in the list of Technical Reports. In this report, activities of the mineral industry are divided into lode mining and exploration and coal mining and exploration.
Mineral Industry Report 1976
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This report is a review of the Yukon mineral industry for 1976 by the Geology Section, Northern Natural Resources and Environment Branch, Department of Indian and Northern Affairs. It includes descriptions of work conducted on mineral claims by individuals and mineral exploration companies and operating summaries of the several producing mines in the Yukon. It also contains geological papers on select properties. Information in this report was obtained from visits to mineral properties, from personal communication with individuals and from technical reports, trade journals, newspapers, publications of the Geological Survey of Canada and the monthly reports of the District Mining Recorders. A list of assessment reports, both confidential and those available for inspection, is included in the list of Technical Reports. In this report, activities of the mineral industry are divided into lode mining and exploration, coal mining and exploration and placer mining.
Yukon Mineral Deposit Profiles
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The deposit models project is an attempt to classify the many known metallic mineral deposits and occurrences in Yukon into specific mineral deposit models. This work began with the initiation of regional mineral potential assessments by the Yukon government (e.g., Bradshaw and vanRanden, 2004). The quantitative method used for regional mineral assessments in Yukon is based on a method developed by the United States Geological Survey (USGS), which uses the mineral deposit models of Cox and Singer (1986). The reader is encouraged to consult this reference for further discussion on the fundamental purpose for defining mineral deposit models. In general terms, resource assessments require that tracts of land be assessed on the basis of probability for the occurrence of one or more specific deposits of a particular type with previously defined grades and tonnages. In the course of conducting regional mineral potential assessments, grade and tonnage information for deposit types that occur or potentially could occur in Yukon was compiled, grade and tonnage curves were constructed, and deposit models were assigned to known mineral deposits and occurrences (i.e., Yukon MINFILE occurrences).
Geophysical survey of the Rye Park scheelite deposit
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In October, 1951, the Geological Section of the Bureau of Mineral Resources recommended a geophysical survey at the newly-developed Rye Park tungsten deposit. The purpose of the survey was the delineation of the main mineralised areas around a granite cupola. The geology of the area, survey methods, and field operations are described in this report. The result of the survey and of diamond drill hole testing are discussed.
Reclamation practices and research on mineral exploration properties in the Yukon Territory
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Reclamation testing was carried out on 3 mineral exploration sites in Yukon: an alpine site at the Red Ridge property in the Whitehorse area, and 2 subalpine sites, a boreal forest site at the Nucleus property in the Carmacks area, and a site in moist permafrost at the Hawk propeerty int he Dawson City area.
Mineral Assessment of the Eagle Plain Study Area, Yukon.
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This report outlines the results and the conclusions of a study of the mineral potential of the Eagle Plains area. The accompanying mineral potential map ranks the different tracts according to their relative order of mineral potential, from highest to lowest. The highest ranking rocks occur on the flanks of the Richardson Anticlinorium which corresponds to the flanks of the southern Richardson Mountains. Other contributions resulting from this study include: complete geochemical coverage of the area provided by a new Regional Geochemical Survey and reanalysis of silt samples of a pre-existing survey; the discovery of several new mineral occurrences; the discovery of rocks of possible volcanic origin, previously undocumented in the area; and modifications to the pre-existing geology maps.
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