Yukon Territory

The mink Mustela vision) is a piscivorous mammal that also has been exposed to relatively high dietary levels of methyl mercury in North America in recent times. In a Canadian study, mink trapped in Yukon territory, Ontario, and Nova Scotia were analyzed for levels of mercury and abundance of muscarinic, cholinergic and dopaminergic receptors in the brain (Basu et al. 2005). A correlation was found between total Hg levels and abundance of muscarinic receptors, but a negative correlation was found between total Hg and abundance of dopaminergic receptors. Thus, it was suggested that environmentally relevant concentrations of Hg (much of it in methyl form) may alter neurochemical function. The highest levels of mercury contamination were found in mink from Nova Scotia that had a mean concentration of total Hg of 5.7 pg/g in brain, 90% of which was methyl mercury. 

Day, S.J., Hope, G., Kuit, W. 1997. Waste rock management planning for the Kudz Ze Kayah project, Yukon Territory 1. Predictive Static and Kinetic Test Work. Proceedings of the 4th International Conference on Acid Rock Drainage. Vancouver, I, 81-98. 

The regional-based survey pattern of the GSC-determined Hg concentrations (ppb) in stream sediments across Canada is shown in Fig.1. Of particular interest are (i) the high Hg concentration cluster near the central north-eastern border of the Yukon Territory (Survey Zone 3), (ii) the somewhat elevated background levels in the southern portions of the Canadian Shield along the Great Lakes, (iii) the scattered pattern of similar values throughout British Columbia, Labrador and... 

Figure 11.28 shows the rhenium and osmium isotopic compositions of black shales and sulfide ores from the Yukon Territory (Horan et al., 1994). The black shale and sulfide layers are approximately isochronous. The superimposed reference isochrons bracket the depositional age of the enclosing shales. One reference line represents the minimum age (367 Ma) with an initial ( Os/ Os)q ratio of one, consistent with the mantle isotopic composition at that age (see later). The other reference isochron is drawn for a maximum age of 380 Ma, with ( 870s/ 860s)o = 12 (the maximum value measured in terrigenous sediments). Further examples of application of Re-Os dating of sediments can be found in Ravizza and Turekian (1989). 

Figure 11.28 Re-Os isochron for black shales and sulfide deposits of Yukon Territory (Canada). Reprinted from M. F. Horan et ah, Geochimica et Cosmochimica Acta, 58, 257-265, copyright 1994, with kind permission from Elsevier Science Ltd., The Boulevard, Langford Lane, Kidlington 0X5 1GB, UK.

Horan M. E, Morgan J. W, Grauch R. I., Coveney R. M. Jr., Murowchick J. B., and Hulbert L. J. (1994). Rhenium and osmium isotopes in black shales and Ni-Mo-PGE-rich sulfide layers, Yukon Territory, Canada, and Hunan and Guizhou provinces, China. Geochim. Cosmochim. Acta, 58 257-265. 

Spatio-temporal geochemical dynamics of an acid rock drainage stream in the Yukon Territory implications for mineral exploration... 

Keywords SEDEX deposit, Yukon Territory, acid rock drainage, mineral exploration vectors, groundwater. 

The Selwyn Basin in the Yukon Territory of Canada hosts major SEDEX Zn-Pb sulphide deposits, the biggest being the relatively large ( 90.4 Mt) deposits at Howard s Pass Y), owned by Selwyn Resources (Morganti 1979 Goodfellow 2004). This research focuses on the surficial geochemical expression of the XY deposit, one of the 13 known orebodies within the Howards Pass district. 

This research investigated the soil geochemistry over the XY deposit, Howard s Pass, Yukon Territory, using a hydroxylamine partial leach protocol. In this case study ... 

Petrogenesis of dykes related to Cu-Au base-metal Au-Ag occurrences, Mt. Freegold area, Dawson Range, Yukon Territory,... 

Mactung is located in the Yukon Territory, in northwestern Canada, NE of Whitehorse, the capital of Yukon. The area is known for its large tungsten skarn deposit (33 Mt at 0.9% WO3, using 0.5% cut-off grade). The deposit lies near the border of the Yukon and NWT, and is centred at about 63° 17 N latitude and 130° 10 W longitude. 

Hart, C.J.R., Mair, J.L, Goldfarb, R.J., Groves, D.I. 2004. Source and redox controls on metallogenic variations in intrusion-related ore systems, Tombstone-Tungsten Belt, Yukon Territory, Canada. Transactions of the Royai Society of Edinburgh Earth Sciences, 95, 339-356. 

Duncan, R.A. 1999. Physical and Chemical Zonation in the Emerald Lake Pluton, Yukon Territory. M.Sc. thesis, Inv. of B.C., Vancouver. 

Smit, H. 1984. Petrology, chemistry, age, and isotope study of the high potassium Emerald Lake pluton, eastern Yukon Territory. B.Sc. thesis, Univ. of B.C., Vancouver. 

Bineli-Betsi, T. Lentz, D.R. 2009. Petrogenesis of dykes related to Cu-Au base-metal-Au-Ag occurrences, Mt. Freegold area, Dawson Range, Yukon Territory, Canada. Extended conference abstract, 24 lAGS meeting, Fredericton, NB, Canada. 

Kwong, Y.T.J. (2003) Characteristics of impounded tailings at Mount Nansen, Yukon territory implications for remediation, in Proceedings-Assessment and Remediation of Contaminated Sites in Arctic and Cold Climates, (eds M. Nahir, K. Biggar and G. Cotta), University of Alberta, Edmonton, pp. 57-62. 

Nishikawa, O., Okrugin, V., Belkova, N. et al. (2006) Crystal symmetry and chemical composition of yukonite TEM study of specimens collected from Nalychevskie hot springs, Kamchatka, Russia and from Venus mine, Yukon Territory, Canada. Mineralogical Magazine, 70(1), 73-81. 

Goodfellow W. D., Nowlan G. S., McCracken A. D., Lanz A. C., and Gregoire D. C. (1992) Geochemical anomalies near the Ordovician—Silurian boundary. Northern Yukon Territory, Canada. Hist. Biol. 6, 1-23. 

Table 2(b) Methane data from polar ice cores, and Mt. Logan ice core (Yukon Territory, Canada). Methane concentrations are hsted for the LGM ( 18-24 ka), the Holocene Epoch (1-10 ka), and the most recent pre-industrial part of the Holocene Epoch (1000-1800 AD). Key references for the CH4 data from each core site are listed in the right-hand column. The superscript letters in the data table indicate the references from which the indicated values were derived. Values for Vostok(LGM and Holocene) and Dome C (LGM and Holocene)... 

Kidd, K.A., D.W. Schindler, R.H. Hesslein, and D.C.G. Muir. 1998. Effect of trophic position and lipid on organochlorine concentrations in fishes from subarctic lakes in Yukon Territory. Can. J. Fish. Aquat. Sci. 55 869-881. 

Coleman LC, Robertson BT (1981) Nahpoite, Na2HP04, a new mineral from the Big Fish River area, Yukon Territory. Can Mineral 19 373-376... 

Mandarino JA, Sturman BD, Corlett MI (1977) Penikisite, the magnesium analogue of kulanite, from Yukon Territory. Can Mineral 15 393-395... 

Mandarino JA, Sturman BD, Corlett MI (1978) Satterlyite, a new hydroxyl-bearing ferrous phosphate from the Big Fish area, Yukon Territory. Can Mineral 16 411-413 Martini JEJ (1978) Sasaite, a new phosphate mineral from West Driefontein Cave, Transvaal, South Africa. Mineral Mag 42 401-404... 

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