Journal articles: 'Bathurst Island'

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Poole, Kim G., Anne Gunn, Jack Wierzchowski, and Morgan Anderson. "Peary caribou distribution within the Bathurst Island Complex relative to the boundary proposed for Qausuittuq National Park, Nunavut." Rangifer 35, no. 2 (December 17, 2015): 81. http://dx.doi.org/10.7557/2.35.2.3635.

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How caribou (Rangifer tarandus), including Peary caribou (R. t. pearyi), use their annual ranges varies with changes in abundance. While fidelity to some seasonal ranges is persistent, use of other areas changes. Consequently, understanding changes in seasonal distribution is useful for designing boundaries of protected areas for caribou conservation. A case in point is the proposed Qausuittuq (Northern Bathurst Island) National Park for Bathurst Island and its satellite islands in the High Arctic of Canada. Since 1961, Peary caribou have been through three periods of high and low abundance. We examined caribou distribution and composition mapped during nine systematic aerial surveys (1961–2013), unsystematic helicopter surveys (1989–98), and limited radio-collaring from 1994–97 and 2003–06. While migration patterns changed and use of southern Bathurst Island decreased during lows in abundance, use of satellite islands, especially Cameron Island for winter range, persisted during both highs and lows in abundance. The northeast coast of Bathurst Island was used to a greater extent during the rut and during summer at low abundance. We suggest that Park boundaries which include Cameron Island and the northeast coast of Bathurst Island will be more effective in contributing to the persistence of Peary caribou on the Bathurst Island Complex.

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Kotyk, Michele E., and James F. Basinger. "The Early Devonian (Pragian) zosterophyll Bathurstia denticulata Hueber." Canadian Journal of Botany 78, no. 2 (April 7, 2000): 193–207. http://dx.doi.org/10.1139/b99-179.

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Approximately 86 specimens of Bathurstia denticulata Hueber were collected from upper Bathurst Island and lower Stuart Bay beds of Bathurst Island, Canadian Arctic Archipelago. Bathurstia was a component of a zosterophyll-dominated flora of Pragian age (Lower Devonian) that existed at low paleolatitudes in northern Canada. The large collection of well-preserved materials permits reconstruction of the plant as a robust scrambler of about 30 cm in height. Stems bear short, shelf-like emergences in two rows, and branch isotomously, although sparsely. Rooting organs, representing some of the oldest known for land plants, arise from the main aerial axes, although they are also associated with small, subordinate shoots interpreted as plantlets. Numerous specimens are fertile, with sporangia borne in dense terminal spikes. Spikes include two rows of overlapping, discoid sporangia. Isospores are round and featureless, and assignable to the genus Calamospora. While Bathurstia apparently originated from among the isotomously branching bilaterally symmetrical zosterophylls, the phylogenetic relationships of Bathurstia to known taxa is unclear, although some resemblance to Serrulacaulis, Barinophytaceae, and the Gosslingiaceae can be documented. Bathurstia denticulata is now one of the best known of early land plants, and contributes significantly to our understanding of zosterophylls and their role in Early Devonian vegetation.Key words: Bathurstia, zosterophyll, Devonian, Canada, Arctic, evolution.

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Miller, Frank L., and Samuel J. Barry. "Single-island home range use by four female Peary caribou, Bathurst Island, Canadian High Arctic, 1993-94." Rangifer 23, no. 5 (April 1, 2003): 267. http://dx.doi.org/10.7557/2.23.5.1710.

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Spatial and temporal use of seasonal, and collectively, annual ranges by four female Peary caribou (Rangifer taran-dus pearyi) was investigated using satellite telemetry. Knowledge of how caribou use space allows a better understanding of their demands on those ranges and enhances evaluation of associated environmental stressors. The study took place during an environmentally favorable caribou-year with high reproduction and calf survival and low (none detected) 1+ yr-old mortality, 1 August 1993 to 31 July 1994, Bathurst Island, south-central Queen Elizabeth Islands, Canadian High Arctic. All four females exhibited a pattern of single-island seasonal, and collectively, annual range use. Estimates of the maximum area encompassed by each individual during the course of the annual-cycle varied from 1735 to 2844 km2 (mean±SE = 2284±250 km2). Although, there was 46% spatial overlap among individual ranges, temporal isolation resulted in the four individuals maintaining seasonal ranges distinctly separate from each other. This collective area encompassed 4970 km2 and equaled about 31% and 18% of Bathurst Island and the Bathurst Island complex, respectively. Individual wintering areas formed a relatively small portion of each individual's annual range (mean±SE=71±17 km2): 24 km2, 158 days of occupation, <1% of the annual area; 70 km2, 187 days, 4%; 95 km2, 200 days, 4%; and 94 km2, 172 days, 6%. Seasonal movements were greatest during pre-rut and pre-calving.

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Fjellberg, Arne. "Collembola of the Canadian high arctic. Review and additional records." Canadian Journal of Zoology 64, no. 10 (October 1, 1986): 2386–90. http://dx.doi.org/10.1139/z86-355.

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A revised list of species from the Queen Elizabeth Islands is given, including new records from Ellesmere, Devon, Cornwallis, Bathurst, King Christian, and Ellef Ringnes islands. Fifty species are reported (43 named and 7 unnamed), with the highest number from Ellesmere Island (41). About 75% of the species in the area have a circumpolar or holarctic distribution.

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Bischof, Jens F., and Dennis A. Darby. "Quaternary ice transport in the Canadian Arctic and extent of Late Wisconsinan Glaciation in the Queen Elizabeth Islands." Canadian Journal of Earth Sciences 36, no. 12 (December 1, 1999): 2007–22. http://dx.doi.org/10.1139/e99-096.

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Most of the ice-rafted debris in channels off the Queen Elizabeth Islands, Nunavut, is of local origin, particularly in the inner part of the archipelago, but samples from the Arctic shelf contain as much as 40% grains from sources as far away as 2000 km, including the Siberian shelves. Particle transport by drifting sea ice from distant shelves is an important process on the Arctic continental shelf of the Queen Elizabeth Islands. In the interior of the Queen Elizabeth Islands and in the Viscount Melville and Lancaster sounds, particle transport is limited to distances of approximately 200 km. Mixing is more common among grains of coarse silt to fine sand than in the >250 µm fraction, but even the latter contains debris from sources far apart. During the Late Wisconsinan, the northern, southern, and eastern Queen Elizabeth Islands were covered by glaciers flowing radially from ice centers on the islands into the inter-island channels. Queens Channel was completely filled by ice, and a glacier lobe moved north from an ice divide northwest of Devon Island to Peary Channel. This lobe redistributed crystalline and carbonate erratics that are derived in part from a strongly weathered and degraded till that was deposited by a pre-Late Wisconsinan glaciation, and in part from glacial erratics that were deposited below the marine limit by icebergs during the Late Wisconsin deglaciation. Tills from eastern Bathurst Island are locally derived and devoid of erratics, but submarine tills west of Bathurst Island contain crystalline erratics that could be from either the Canadian Shield or Victoria Island.

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Young, Kathy L., Melissa J. Lafrenière, Scott F. Lamoureux, Anna Abnizova, and Elizabeth A. Miller. "Recent multi-year streamflow regimes and water budgets of hillslope catchments in the Canadian High Arctic: evaluation and comparison to other small Arctic watershed studies." Hydrology Research 46, no. 4 (August 12, 2014): 533–50. http://dx.doi.org/10.2166/nh.2014.004.

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This study evaluates whether a recent decline in snowcover extent for circumpolar regions is matched by changes in the seasonal streamflow regime of several small hillslope catchments on Bathurst and Melville Islands. This includes shifts in the timing of initiation, peak discharge and impacts on the spring–summer water budgets. Paired catchments (West and East) at the Cape Bounty Arctic Watershed Observatory (CBAWO) on Melville Island (74.9°N, 109.5°W) have been studied from the pre-snowmelt season to early August since 2003. They are low-rolling tundra catchments between 8.0 and 11.6 km2 in area. Likewise, within the Polar Bear Pass (PBP) watershed, Bathurst Island (75.7°N 98.7°W), two hillslope basins, Windy Creek (4.2 km2) and Landing Strip Creek (0.2 km2) have been investigated since 2007. Detailed snow surveys were conducted each spring and streamflow estimates were made using the mid-section velocity method. Nival regimes continue to dominate in these basins but runoff ratios are variable between catchments, across islands, and from year-to-year. In comparison to earlier streamflow studies across the Queen Elizabeth Islands (QEIs), an earlier response to peak discharge and start of flow for these hillslope streams is confirmed. Water budgets for PBP, CBAWO differ from other small Arctic watersheds.

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Harrison, Christopher. "Intersecting fold belts in the Bathurst Island region, Nunavut." Journal of Geodynamics 118 (July 2018): 82–105. http://dx.doi.org/10.1016/j.jog.2017.11.003.

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8

Anderson, Morgan. "Trends in high arctic muskox (Ovibos moschatus) harvest, 1990-2015." Rangifer 37, no. 1 (July 27, 2017): 47–58. http://dx.doi.org/10.7557/2.37.1.4182.

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Harvest reporting has been in place for High Arctic muskoxen in Nunavut, Canada, since 1990-91. The communities of Resolute, Grise Fiord, and Arctic Bay harvest muskoxen in the region. Overall, muskox harvest has declined in Resolute and Grise Fiord since the 1990s. The recovery of Peary caribou populations on the Bathurst Island Complex, which provides an alternate preferred source of country food, may be a factor behind Resolute’s decreased muskox harvest. The proportion of harvest for domestic use has also declined relative to sport hunts, which have remained relatively constant since the 1990s. We compared muskox harvest from tag records and reported harvest, i.e., the voluntary surveys to the Nunavut Wildlife Harvest Study for muskoxen. It is clear that voluntarily reported harvest underestimates actual harvest, but not consistently enough to predict the actual harvest. Muskox populations are at historic high levels on Bathurst Island, southern Ellesmere Island, and Devon Island and could support more harvest than is currently taken. Changes to Total Allowable Harvests and management unit boundaries in 2015, combined with a decline in the availability of Baffin Island caribou as country food, may result in increased harvest pressure on muskoxen in the High Arctic.

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9

Ferguson, Michael A. D. "Status and trends of Rangifer tarandus and Ovibos moschatus populations in Canada." Rangifer 12, no. 3 (October 1, 1992): 127. http://dx.doi.org/10.7557/2.12.3.1017.

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We identified 97 Rangifer tarandus and 17 Ovibos moschatus populations in Canada. In July 1991, the Canadian populations totalled 1.9 to 2.6 million caribou, 13 600 reindeer and 108 600 muskoxen. Seven barren-ground caribou populations contributed about 75% to Canada's total number of caribou. Most population trends of these barren-ground caribou had shiftet from increasing in the early 1980s to stable or decreasing in the late 1980s. The George River herd of Quebec and Labrador has been decreasing since 1987, but remains the largest Canadian caribou population. The ecological factors driving barren-ground caribou population dynamics are not well understood. Arctic islands caribou are about 17% of all Canadian caribou. Over 60% of Arctic islands caribou occurred on Baffin Island. Most Arctic islands populations were decreasing with the exceptions of Southampton, Bathurst, Victoria and Baffin islands. Movements within and between islands are not well understood, and probably limit the usefulness of small surveys for indicating long-term trends of Arctic islands caribou populations. Woodland caribou form about 7% of all Canadian caribou, with about 40% of these occurring on the island of Newfoundland. Most Canadian woodland caribou have not been well studied or censused. In many areas, they were faced with an increasing rate of habitat loss. Exceptions included: some eastern Yukon populations and most Newfoundland populations which were increasing. Over 70% of the Canadian muskox population occurred on Banks and Victoria islands. Almost all muskox populations were increasing, especially those on Banks, Victoria, Melville and Bathurst islands. Muskoxen on the mainland Northwest Territories are re-colonizing southern portions of their historical distribution.

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10

West, B. G., and V. L. Passmore. "HYDROCARBON POTENTIAL OF THE BATHURST ISLAND GROUP, NORTHEAST BONAPARTE BASIN, IMPLICATIONS FOR FUTURE EXPLORATION." APPEA Journal 34, no. 1 (1994): 626. http://dx.doi.org/10.1071/aj93048.

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Despite 20 years of exploration between 1965 and 1992 in the northeastern part of the Bonaparte Basin, the region remains underexplored. Exploration has produced modest encouragement. The seven wells drilled in the area totalling more than 70 000 km2 include one dry gas and two gas/condensate discoveries. Explorers have targeted the Jurassic Plover Formation and Flamingo Group, but reservoir quality has often been poor in both units due largely to depth of burial.Recent regional studies of the northeastern part of the Bonaparte Basin, undertaken by the Bureau of Resource Sciences, indicate there is potential for generation and entrapment of hydrocarbons in the Cretaceous Bathurst Island Group. Geochemical results show the lower Bathurst Island Group contains good source rocks that are largely gas prone, but have the potential to charge large Cretaceous traps. Geohistory modelling suggests that the Bathurst Island Group may have entered the oil window around the Middle Cretaceous, after most of the structuring had occurred, and continued until the Middle Miocene or later. Potential reservoirs have been identified in Santonian, Campanian and Maastrichtian sands, and in fractured Albian Carbonates.Recent reports have predicted that by early next century there will be a significant increase in natural gas consumption in Australia, due to increased use for power generation and transportation, as well as further sales to the Asian market. New methanol technology could commercialise some marginal gas fields. The theme for this years APEA conference is `New Age—New Opportunities'. The Bonaparte Basin may provide the opportunity to explore for and develop new gas accumulations.

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11

Young, Kathy L., Laura Brown, and Claude Labine. "Snow cover variability at Polar Bear Pass, Nunavut." Arctic Science 4, no. 4 (December 1, 2018): 669–90. http://dx.doi.org/10.1139/as-2017-0016.

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Information on arctic snow covers is relevant for climate and hydrology studies and investigations into the sustainability of both arctic fauna and flora. This study aims to (1) highlight the variability of snow cover at Polar Bear Pass (PBP) at a range of scales: point, local, and regional using both in situ snow cover measurements and remote sensing imagery products; and (2) consider how snow cover at PBP might change in the future. Terrain-based snow surveys documented the end-of-winter snowpacks over several seasons (2008–2010, 2012–2013), and snowmelt was measured daily at typical terrain types. MODIS products (snow cover) were used to document spatial snow cover variability across PBP and Bathurst and Cornwallis Islands. Due to limited data, no significant difference in snow cover duration can be identified at PBP over the period of record. Locally, end-of-winter snow cover does vary across a range of terrain types with snow depths and densities reflecting polar oasis sites. Aspect remains a defining factor in terms of snow cover variability at PBP. Northern areas of the Pass melt earlier. Regionally, PBP tends to melt out earlier than most of Bathurst Island. In the future, we surmise that snowpacks at PBP will be thinner and disappear earlier.

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12

Campbell, R. J. "Selachian scales from the Cenomanian (Late Cretaceous) of Bathurst Island, northern Australia." Alcheringa: An Australasian Journal of Palaeontology 27, no. 2 (January 2003): 93–105. http://dx.doi.org/10.1080/03115510308619550.

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Rayback, Shelly A., Andrea Lini, and Gregory H. R. Henry. "Spatial Variability of the Dominant Climate Signal in Cassiope tetragona from Sites in Arctic Canada." ARCTIC 64, no. 1 (March 9, 2011): 98. http://dx.doi.org/10.14430/arctic4083.

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Our study investigates the nature of the climate signal in three populations of the Arctic dwarf-shrub Cassiope tetragona using dendrochronological and stable isotope analysis techniques. We present 15 new C. tetragona chronologies from three sites (Axel Heiberg, Bathurst, and Devon islands) in the eastern Canadian Arctic, of which three are the first continuous stable carbon isotope ratio (δ¹³C) time series developed for Arctic shrubs. Correlation and multivariate regression analyses revealed that multiple and different climate factors influenced the chronologies within and between the three sites. At the Axel Heiberg Island site, the dominant climatic influences over annual stem elongation were previous year (t-1) and current year (t) summer precipitation, while annual production of flower buds was influenced by (t) winter precipitation and spring temperature. At Bathurst Island, annual production of flower buds responded to (t-1) growing season sunshine hours and winter precipitation and to (t) late growing season temperature and moisture availability. Our analysis of the Axel Heiberg and Bathurst Island models revealed the positive influence on δ13C values of (t-1) winter temperature—and on Bathurst Island only, of (t-1) spring sunshine hours. The combined influence of these parameters on spring moisture availability suggests that the δ13C ratios varied in response to stomatal conductance. At Devon Island, the δ13C values varied in response to (t) and (t-1) spring and summer temperature and spring and fall solar radiation, which in turn influence the rate of photosynthesis. Our study supports the emerging hypothesis that Arctic shrubs are sensitive to climate. However, strong spatial variation in plant-climate response characterized our sampling sites. This variation may be linked to site sensitivity, or regional climate variability due to geographic and topographic differences, or both.

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Stearn, Colin W. "Devonian stromatoporoid fauna of the Bent Horn oilfield, Cameron Island, Northwest Territories." Canadian Journal of Earth Sciences 35, no. 1 (January 1, 1998): 16–22. http://dx.doi.org/10.1139/e97-089.

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The reservoir reef carbonates at the Bent Horn field have been referred to as the Blue Fiord Formation, but they are younger than the type Blue Fiord of Ellesmere Island. The top of these carbonates, from which the stromatoporoid fauna is here described, is dated by conodonts as of Eifelian age. They are the same unit that has also been called the Unnamed Formation. Fourteen taxa of stromatoporoids, none of them described here as new, are identified from cores. Five species are common to the fauna of the Unnamed Formation of surface exposures on Bathurst and Truro islands. The ranges of the three species from the fauna of the typical Blue Fiord of Emsian age are extended into this Unnamed Formation. A synthesis of the paleontological evidence suggests that the top of the reservoir is basal Eifelian age. The recognition of Pseudoactinodictyon cf.P. stearni and Simplexodictyon vermiforme at Bent Horn suggests paleogeographic connections to the Great Lakes and Yukon stromatoporoid faunas of this age.

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15

Murray, Peter. "Plesiosaurs from Albian aged Bathurst Island formation siltstones near Darwin, Northern Territory, Australia." Beagle : Records of the Museums and Art Galleries of the Northern Territory 4, no. 1 (December 1987): 95–102. http://dx.doi.org/10.5962/p.260902.

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16

Hadley, Kristopher R., Marianne S. V. Douglas, Darlene Lim, and John P. Smol. "Diatom assemblages and limnological variables from 40 lakes and ponds on Bathurst Island and neighboring high Arctic islands." International Review of Hydrobiology 98, no. 1 (February 2013): 44–59. http://dx.doi.org/10.1002/iroh.201201449.

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Namayandeh, Armin, and David V. Beresford. "A new species in the Rheocricotopus (R.) effusus group from Canada with a review of the Nearctic species of Rheocricotopus and Parametriocnemus (Chironomidae: Orthocladiinae)." CHIRONOMUS Journal of Chironomidae Research, no. 31 (December 27, 2018): 16–29. http://dx.doi.org/10.5324/cjcr.v0i31.2531.

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Rheocricotopus (Rheocricotopus) reduncusoides sp. n. is described from Bathurst Island, Nunavut, Canada. Its discovery was made while curating and examining specimens deposited by H. V. Danks in 1969 at the Canadian National Collection in Ottawa, Canada. We also report the first Canadian record of Parametriocnemus hamatus (Johannsen, 1934) from Québec, based on previously unsorted material deposited at the Canadian National Collection. In this paper we provide distributional records of the Nearctic species of Rheocricotopus Thienemann and Harnisch and Parametriocnemus Goetghebuer, and present a key to the Nearctic adult males of these genera.

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Li, Rong-yu, and Brian Jones. "Communities and paleoecology of Eifelian (mid-Devonian) brachiopods from the Bird Fiord Formation of Arctic Canada." Canadian Journal of Earth Sciences 39, no. 10 (October 1, 2002): 1485–503. http://dx.doi.org/10.1139/e02-051.

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The carbonatesiliciclastic strata in the Bird Fiord Formation of Arctic Canada contain a diverse brachiopod-dominated biota. A collection of 46 381 brachiopods from 126 sites at 35 localities on Ellesmere Island, North Kent Island, Grinnell Peninsula (Devon Island), and Bathurst Island includes 22 species assigned to 21 genera. Many of these taxa are endemic to Arctic Canada. Each collection of brachiopods is typically dominated by only one or two taxa. Cluster analysis, based on binary data, shows that the brachiopods can be divided into an AtrypaElythyna community group and a SpinatrypinaDesquamatia community group. The former encompasses the AtrypaElythyna and AtrypaElythynaPerryspirifer communities, and the latter includes the SpinatrypinaDesquamatia and SpinatrypinaDesquamatiaCranaena communities. The distribution of these communities was primarily related to water depth. Thus, the AtrypaElythyna community group, which belongs to benthic assemblage 3, lived in a shallow, proximal-shelf environment. The SpinatrypinaDesquamatia community group, which belongs to benthic assemblage 4, lived in a deeper, distal-shelf environment.

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Skinner, T., and N. Tapper. "Preliminary sea breeze studies over Bathurst and Melville Islands, northern Australia, as part of the island thunderstorm experiment (ITEX)." Meteorology and Atmospheric Physics 53, no. 1-2 (1994): 77–94. http://dx.doi.org/10.1007/bf01031906.

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20

Fensham, RJ. "The Environmental Relations of Vegetation Pattern on Chenier Beach Ridges on Bathurst Island, Northern Territory." Australian Journal of Botany 41, no. 3 (1993): 275. http://dx.doi.org/10.1071/bt9930275.

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Radiocarbon dates confirm a chronological sequence for late Holocene beach ridges at Wangiti Beach on Bathurst Island. The vegetation on these beach ridges can be clearly related to topography and distance from the sea. Monsoon rainforest occurs on the fore-dunes where the nutrient levels of the young sediments are relatively high. The mid-dunes support woodland dominated by Melalueca viridiflora and have nutrient-poor acid soils. Vegetation with a high component of monsoon rainforest species occupies the rear dunes, which have a high concentration of seawater macronutrient cations despite their older age than more seaward dunes. The relatively low elevation of the rear dunes supports the suggestion that soil nutrient levels are enriched by sea water or marine sediments during infrequent inundation events such as those during cyclones.

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Young, Kathy L. "Swings in runoff at Polar Bear Pass: an extensive low-gradient wetland, Bathurst Island, Canada." Hydrology Research 50, no. 2 (June 21, 2018): 778–92. http://dx.doi.org/10.2166/nh.2018.184.

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Abstract Hydrologic studies in northern landscapes indicate there is a critical need to explore how arctic stream discharge patterns and water budgets may be shifting in response to climate warming. The focus of this study was to: (1) assess the pattern of runoff out of Polar Bear Pass, a low-gradient watershed (75°40′N, 98°30′W), during two contrasting spring/summer seasons: 2012 (warm, early melt) versus 2013 (cool, late melt); (2) quantify the seasonal water budgets; and (3) place these results in the context of other arctic basin studies. The end-of-winter snowpack was quantified using a terrain-based approach. A physically based snowmelt model using local weather station data provided daily melt estimates. Streamflow at the eastern outlet was estimated using the mid-section velocity approach. Snow water equivalent (SWE) was higher in 2013 while snowmelt began and ended earlier in 2012. Stream hydrographs showed a rapid rise in flow driven by meltwater from the northern part of the Pass in 2012. This was followed by a series of secondary peaks, melt contributions from the southern end. In 2013, the largest runoff peaks came from the southern sector. Runoff ratios and water budgets varied between the two years, and runoff in 2013 was similar to High Arctic watersheds in the early 1970s.

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Young, Kathy L., and Claude Labine. "Summer hydroclimatology of an extensive low-gradient wetland: Polar Bear Pass, Bathurst Island, Nunavut, Canada." Hydrology Research 41, no. 6 (September 1, 2010): 492–502. http://dx.doi.org/10.2166/nh.2010.219.

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Polar Bear Pass (PBP) (75°40′N, 98°30′W) is considered a critical wetland area for migratory birds, caribou and muskox. Little is known of its climatology and hydrology. Here we evaluate both the short-term and long-term summer climatic record for this wetland. A 10 m high automatic weather station (AWS) was established here 27 years ago, and in 2007 this centrally located AWS was supplemented by three more weather stations placed across the wetland pass. The long-term climate record here indicates little significant departure when compared to the long-term climate means (1971–2005) at Resolute Bay, a government weather station lying 90 km to the southwest (74°43′N, 94°59′W). Exceptions exist for July minimum air temperature (PBP > Resolute) and number of days in June, July and August < 0°C (PBP < Resolute). Climate variability from year to year remains the norm. Radiation receipt, air temperature, humidity and wind speed vary little across the wetland pass, while terrain-modified fluxes do. The precipitation regime is similar to Resolute Bay but local site conditions modify the amounts. In 2007, July evaporation levels were twice as high as that of 2008; more akin to Low Arctic sites. As yet, no clear trend in long-term climatic signals can be established.

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Young, Kathy L., Jane Assini, Anna Abnizova, and Elizabeth A. Miller. "Snowcover and melt characteristics of upland/lowland terrain: Polar Bear Pass, Bathurst Island, Nunavut, Canada." Hydrology Research 44, no. 1 (July 31, 2012): 2–20. http://dx.doi.org/10.2166/nh.2012.083.

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The seasonal snowcover and snowmelt (2008–2010) of an extensive low-gradient wetland at Polar Bear Pass, Bathurst Island, Nunavut, Canada (75°40′ N, 98°30′ W) was examined. This wildlife sanctuary is characterized by two large lakes and numerous tundra ponds, and is bordered by rolling hills with incised hillslope stream valleys. In arctic environments snow remains one of the most important sources of water for wetlands. End-of-winter snowcover measurements (snow depth, density, water equivalent) together with direct and modeled estimates of snowmelt provided an assessment of the seasonal snowcover regime of representative terrain types comprising upland (plateau, stream valley, late-lying snowbed) and lowland landscapes (wet meadow, ponds, lakes). In all three seasons, deep and persistent snowpacks occurred in sheltered areas (stream valleys) and in the lee of slopes adjacent to the wetland. Exposed areas yielded shallow snowpacks (e.g. plateau, pond) and they melted out rapidly in response to favorable weather conditions. Overall, the basin snowcover and melt progression was dominated by accumulation and melt occurring in upland areas. We surmise the sustainability of this low-gradient wetland is dependent on snowmelt contributions from upland sites.

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Stilwell, Jeffrey D., and Robert A. Henderson. "Description and paleobiogeographic significance of a rare Cenomanian molluscan faunule from Bathurst Island, northern Australia." Journal of Paleontology 76, no. 3 (May 2002): 447–71. http://dx.doi.org/10.1017/s0022336000037306.

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A middle Cenomanian faunule from the Moonkinu Formation of Bathurst Island in Northern Australia contains the best-preserved suite of benthic Mollusca known from the Cretaceous of the Australian region. Twenty-four species of bivalves, gastropods, and scaphopods, many exquisitely preserved with original aragonitic nacre, are recognized. Thirteen are new: Nucula s.l. meadinga n. sp. (Nuculidae), Nuculana bathurstensis n. sp. (Nuculanidae), Jupiteria? n. sp. A (Nuculanidae), Varicorbula cretaustrina n. sp. (Corbulidae), Vanikoropsis demipleurus n. sp. (Vanikoridae), Euspira n. sp. A (Naticidae), Amuletum praeturriformis n. sp. (Turridae), Granosolarium cretasteum n. sp. (Architectonicidae), Echinimathilda moonkinua n. sp. (Mathildidae), Acteon bathurstensis n. sp. (Acteonidae), Biplica antichthona n. sp. (Ringiculidae), Goniocylichna australocylindricata n. sp. (Cylichnidae), and Dentalium (Dentalium) n. sp. A (Dentaliidae). Nominal species of Nuculana, Grammatodon, Cylichna, and Laevidentalium also are present. The occurrence of ammonites, including taxa that occur in the type Cenomanian, securely establishes the fauna as middle Cenomanian (Acanthoceras rhotomagense Zone). The Moonkinu Formation and its faunule were deposited in a high-energy, shallow-shelfal setting, as part of a large-scale regressive cycle recognized as the Money Shoals Platform of northern Australia. The assemblage represents a parauthochthonous suite which experienced little or no post mortem transport. Epifaunal and infaunal suspension feeders (some 60 percent) dominate the bivalve fauna with a subordinate representation of deposit-feeding infaunal burrowers (some 40 percent). Nearly all of the gastopods were carnivores with the aporrhaid Latiala mountnorrisi (Skwarko), probably a deposit feeder, the only exception. The scaphopods were probably micro-carnivores. Concentrations of the ammonite Sciponoceras glaessneri are likely the result of mass kills in surface waters. The cosmopolitan nature of the Bathurst Island fauna at the genus-level reflects unrestricted oceanic circulation patterns and an equitable climate on a global scale during the Cenomanian. The retreat and disappearance of the Australian epicontinental sea at the close of the Albian coincided with reduced endemism in the molluscan faunas, after which time the continental shelves hosted a rich suite of cosmopolitan affinity. The high number of endemic species in the Moonkinu Formation probably represents an early stage of broad-scale genetic separation among Southern Hemisphere molluscan stocks, a trend that became increasingly pronounced through the Late Cretaceous. The new records of Varicorbula, Amuletum, Granosolarium, Echinimathilda, and Goniocylichna represent the oldest occurrences recorded for these genera and are suggestive of Southern Hemisphere origins.

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STILWELL, JEFFREY D., and ROBERT A. HENDERSON. "DESCRIPTION AND PALEOBIOGEOGRAPHIC SIGNIFICANCE OF A RARE CENOMANIAN MOLLUSCAN FAUNULE FROM BATHURST ISLAND, NORTHERN AUSTRALIA." Journal of Paleontology 76, no. 3 (May 2002): 447–71. http://dx.doi.org/10.1666/0022-3360(2002)076<0447:dapsoa>2.0.co;2.

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26

Abnizova, Anna, Kathy L. Young, and Melissa J. Lafrenière. "Pond hydrology and dissolved carbon dynamics at Polar Bear Pass wetland, Bathurst Island, Nunavut, Canada." Ecohydrology 7, no. 1 (October 11, 2012): 73–90. http://dx.doi.org/10.1002/eco.1323.

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27

Fenge, Terry. "Conservation of Polar Bear Pass, Bathurst Island, and the Emerging Comprehensive Conservation Policy for Northern Canada." Environmental Conservation 12, no. 3 (1985): 231–40. http://dx.doi.org/10.1017/s0376892900015964.

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During 1975 to 1984, a particularly divisive debate accompanied proposals to conserve Polar Bear Pass, NWT. Virtually all interests that participated in the debate supported a more comprehensive approach towards conservation of natural areas than had hitherto prevailed, and criticized the ad hoc manner in which conservation proposals were being handled by the Federal Government of Canada.Chastened by the experience with Polar Bear Pass, and suffering land-use allocation problems in many locations, the Department of Indian Affairs and Northern Development responded with a Northern Land-use Planning Policy (Diand, 1981a, 1981b), and is now developing a comprehensive conservation policy.Future conservation reserves in northern Canada are likely to be established as a result of regional land-use planning. It is important, however, that conservation of natural areas in both Territories support northern political development and devolution of resource management authority to northern governments, and settlement of landclaims made by native peoples.

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Stearn, Colin W. "Stromatoporoids from the allochthonous reef facies of the Stuart Bay Formation (Lower Devonian), Bathurst Island, arctic Canada." Journal of Paleontology 64, no. 4 (July 1990): 493–510. http://dx.doi.org/10.1017/s0022336000042529.

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Fourteen taxa of stromatoporoids are described from allochthonous blocks of reefal limestone embedded in siltstones of late Gedinnian to Siegenian age. The fauna is a mixture of genera that characterize Ludlovian–Gedinnian rocks (Actinodictyon, Parallelostroma, Syringostromella) and those that characterize Emsian–Eifelian rocks (Atopostroma, Anostylostroma, Habrostroma, Syringostroma). The following new species are described: Gerronostroma franklinense, Gerronostroma nivale, Actinodictyon venustum, and Syringostromella praecox. The new genus Belemnostroma with type species B. hastatum n. sp. is established for stromatoporoids with the basic structure of Anostylostroma but penetrated by large, rodlike megapillars. Species with long coenosteles are excluded from Stromatopora on the basis that they are not congeneric with the type species and many species assigned to Ferestromatopora should be reassigned to Stromatopora. Previously described species of Atopostroma, Stromatopora, and Parallelostroma are recognized and redescribed.

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29

Young, Kathy L., Harold-Alexis Scheffel, Anna Abnizova, and John R. Siferd. "Spatial and temporal dynamics of groundwater flow across a wet meadow, Polar Bear Pass, Bathurst island, Nunavut." Permafrost and Periglacial Processes 28, no. 2 (December 27, 2016): 405–19. http://dx.doi.org/10.1002/ppp.1931.

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30

Lim, Darlene S. S., Marianne S. V. Douglas, John P. Smol, and David R. S. Lean. "Physical and Chemical Limnological Characteristics of 38 Lakes and Ponds on Bathurst Island, Nunavut, Canadian High Arctic." International Review of Hydrobiology 86, no. 1 (January 2001): 1–22. http://dx.doi.org/10.1002/1522-2632(200101)86:1<1::aid-iroh1>3.0.co;2-e.

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31

Spry, T. B., and I. Ward. "THE GWYDION DISCOVERY: A NEW PLAY FAIRWAY IN THE BROWSE BASIN." APPEA Journal 37, no. 1 (1997): 87. http://dx.doi.org/10.1071/aj96005.

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The Gwydion-1 oil and gas discovery well is located in exploration permit WA-239-P on the sparsely explored Yampi Shelf area of the Browse Basin. The Gwydion feature was first recognised as a series of stacked seismic amplitude anomalies, which were interpreted to represent hydrocarbon-bearing Barremian to Albian age shallow marine sandstones draped over a prominent basement high. Amplitude versus offset analysis and modelling supported this interpretation.Gwydion-1 was spudded on 4th June, 1995, and discovered three gas bearing zones and one oil and gas bearing zone. The lowermost zone is Barremian to Hauterivian in age and consists of 12.6 m of net gas-filled glauconitic sand overlying a 9.5 m net oil-filled quartz sand. The three overlying hydrocarbon zones consist of glauconitic reservoirs of Barremian to Albian age.The play fairway for Gwydion-style traps has been named as the Echuca/Swan-Bathurst Island Group/Shelfal Play Fairway. It comprises mature Swan Group and Echuca Shoals Formation source rocks, and Bathurst Island Group reservoirs and seals. The limits of the play fairway on the shelf are controlled by the existence of topographic relief in the underlying basement metasediments. Migration pathway analysis suggests that the eastern margin of the Browse Basin is favourably situated to receive charge from the mature source rocks within the basin.The dominant northwesterly dip of the strata on the Yampi Shelf limits the potential for structural traps. Accordingly, a thorough understanding of the sequence stratigraphic architecture of the succession is necessary in order to generate the stratigraphic play concepts which hold the bulk of the prospectivity in the area.Gwydion-1 was plugged and abandoned as an uneconomic oil and gas discovery. It was, however, significant as it validated a new play type and generated renewed interest in the eastern margin of the Browse Basin for the first time since the mid 1970s; an area previously thought to be too shallow, too far from mature source and lacking reliable seal.

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32

Henderson, R. A. "Eustatic and palaeoenvironmental assessment of the mid-Cretaceous Bathurst Island Group of the Money Shoals Platform, northern Australia." Palaeogeography, Palaeoclimatology, Palaeoecology 138, no. 1-4 (April 1998): 115–38. http://dx.doi.org/10.1016/s0031-0182(97)00112-0.

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33

Lim, Darlene S. S., Christine Kwan, and Marianne S. V. Douglas. "PERIPHYTIC DIATOM ASSEMBLAGES FROM BATHURST ISLAND, NUNAVUT, CANADIAN HIGH ARCTIC: AN EXAMINATION OF COMMUNITY RELATIONSHIPS AND HABITAT PREFERENCES." Journal of Phycology 37, no. 3 (June 14, 2001): 379–92. http://dx.doi.org/10.1046/j.1529-8817.2001.037003379.x.

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34

Stock, Carl W., and Judith A. Burry-Stock. "The stromatoporoid Habrostroma in the upper Silurian (uppermost Pridoli)–Lower Devonian (Lochkovian) of North America, and the paleobiogeographic significance of H. centrotum (Girty, 1895)." Journal of Paleontology 94, no. 1 (September 18, 2019): 11–27. http://dx.doi.org/10.1017/jpa.2019.70.

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AbstractThree species of Habrostroma dominate stromatoporoid faunas in the Lower Devonian (Lochkovian) of five areas in North America: New York, Virginia, Maine, Bathurst Island, and Ellesmere Island. In addition, they occur in what could be the upper Silurian (uppermost Pridoli) of Virginia, and possibly New York. Measurements of nine morphologies from 127 specimens of Habrostroma were subjected to an average linkage cluster analysis. Using average linkage between groups, three distinct clusters were revealed. Group assignments made from the cluster analysis were saved, and entered into a canonical discriminant analysis with the nine morphological variables. An overall Wilks’ lambda was calculated, and is statistically significant at alpha <0.001. The hit rate for classifying group 1 is 98%, that for group 2 is 100%, and that for group 3 is 97.9%; the total hit rate is 100%. The morphological variables contributing most to group membership are: (1) percent cystlike microlaminae, (2) microlaminae per mm, (3) gallery height, (4) laminae per mm, and (5) laminar thickness. The statistics confirm that there are three species: H. centrotum, H. microporum, and H. consimile.Habrostroma centrotum occurs in all five areas. This is unusual because Virginia, New York, and Maine are part of the Eastern Americas Realm, and the arctic islands are part of the Old World Realm. Separation of the realms is based on a high percentage of unique genera in each. A breach in the inter-realm barrier is proposed to have existed across the Canadian Shield during the Lochkovian. The nature of the breach is determined to be a shallow-water filter, allowing the passage of a limited number of taxa.

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35

Tews, J., M. A. D. Ferguson, and L. Fahrig. "Modeling density dependence and climatic disturbances in caribou: a case study from the Bathurst Island complex, Canadian High Arctic." Journal of Zoology 272, no. 2 (June 2007): 209–17. http://dx.doi.org/10.1111/j.1469-7998.2006.00257.x.

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36

West, Richard G., and Mary E. Pettit. "Plant macroscopic remains from recent sediments of Banks Island, Northwest Territories, and Bathurst Island, Nunavut, Canada, and the interpretation of Quaternary cold stage plant macroscopic assemblages." Journal of Quaternary Science 15, no. 2 (February 2000): 177–84. http://dx.doi.org/10.1002/(sici)1099-1417(200002)15:2<177::aid-jqs501>3.0.co;2-6.

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37

Givelet, N., F. Roos-Barraclough, M. E. Goodsite, and W. Shotyk. "A 6,000-years record of atmospheric mercury accumulation in the high Arctic from peat deposits on Bathurst Island, Nunavut, Canada." Journal de Physique IV (Proceedings) 107 (May 2003): 545–48. http://dx.doi.org/10.1051/jp4:20030361.

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38

Hadley, Kristopher R., Marianne S. V. Douglas, Robert McGhee, Jules M. Blais, and John P. Smol. "Ecological influences of Thule Inuit whalers on high Arctic pond ecosystems: a comparative paleolimnological study from Bathurst Island (Nunavut, Canada)." Journal of Paleolimnology 44, no. 1 (October 24, 2009): 85–93. http://dx.doi.org/10.1007/s10933-009-9388-6.

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39

Tetard, Martin, Paula J. Noble, Taniel Danelian, Claude Monnet, and Alfred C. Lenz. "A new Gorstian radiolarian fauna from the upper Silurian of the Cape Phillips Formation, Cornwallis and Bathurst islands, Canadian Arctic." Canadian Journal of Earth Sciences 52, no. 10 (October 2015): 863–79. http://dx.doi.org/10.1139/cjes-2015-0028.

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This study provides a taxonomic treatment and comparison of lower Gorstian (Silurian) radiolarians recovered from two sections of the Cape Phillips Formation in the Canadian Arctic that accumulated in two different paleoenvironmental settings. Twilight Creek is more basinal, located ∼100 km from the paleo-shelf margin, whereas Snowblind Creek is located within 1 km of the paleo-shelf break, on Cornwallis Island. The fauna, like other material from the Cape Phillips Formation, is extremely well preserved and was recovered from four samples at two localities, all from the Lobograptus progenitor graptolite Zone, an interval that has few published studies regarding radiolarians. A total of 28 species are recognized, of which two are new and described herein (Fusalfanus bilateralis n. sp. and Pseudospongoprunum parvispina n. sp.), belonging to the Haplotaeniatidae, Inaniguttidae, “Sponguridae”, Ceratoikiscidae, Entactiniidae, Palaeoscenidiidae, and Secuicollactidae. Based on these new data, the stratigraphic ranges of some taxa are extended. The species concepts of several closely related inaniguttid species are re-evaluated. As a result, Inanihella tarangulica Nazarov and Ormiston, 1984 is transferred to the genus Fusalfanus Furutani, 1990 based on cortical shell structure, and Inanihella duroacus, Inanihella legiuncula, and Inanihella perarmata are synonymized under Fusalfanus tarangulica sensu lato. Aciferopylorum admirandum is transferred to Fusalfanus and considered a junior synonym of Fusalfanus osobudaniensis. The comparative analysis of taxonomic richness and composition reveals that the more distal sample from Bathurst Island exhibits a slight, but statistically significant, higher alpha diversity at the species rank than the more proximal basin/platform samples from Snowblind Creek. Biodiversity indices at the genus rank produced mixed results, indicating that differences between sites are at best slight. There is also a strong taxonomic separation between the fine and coarse size radiolarian fractions recovered during the sieving of each sample. The siliceous sponge spicule assemblages from these faunas show an inverse diversity relationship to the radiolarians in that Snowblind Creek contains greater alpha diversity than Twilight Creek. This study provides the first documentation of facies-controls in Silurian radiolarian diversity and is useful in evaluating the role of taxa used in biostratigraphy.

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40

HENDERSON, R. A., and G. D. PRICE. "PALEOENVIRONMENT AND PALEOECOLOGY INFERRED FROM OXYGEN AND CARBON ISOTOPES OF SUBTROPICAL MOLLUSKS FROM THE LATE CRETACEOUS (CENOMANIAN) OF BATHURST ISLAND, AUSTRALIA." PALAIOS 27, no. 9 (October 4, 2012): 617–26. http://dx.doi.org/10.2110/palo.2011.p11-120r.

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41

Rong-Yu, Li, and Brian Jones. "Middle Devonian brachiopods from the Bird Fiord Formation, Arctic Canada." Journal of Paleontology 77, no. 2 (March 2003): 243–66. http://dx.doi.org/10.1017/s0022336000043626.

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The late Early Devonian to Middle Devonian Bird Fiord Formation, which is up to 900 m thick, is exposed along an extensive outcrop belt from stretches from Ellesmere Island to Bathurst Island in Arctic Canada. This formation, which encompasses sediments that accumulated in sabkha, deltaic, and shelf settings, is divided into six members. The Blubber Point, Baad Fiord, Norwegian Bay, and Cardigan Strait members, which include sediments that formed on an open marine shelf, are characterized by a diverse biota of brachiopods, mollusks, corals, trilobites, and sponges. The Cross Bay and Grise Fiord members, which encompass sediments that formed in a sabkha and delta plain settings, respectively, are generally devoid of fossils.A collection of 47,026 brachiopods, which came from 140 collections made at 34 locations throughout the outcrop belt of the Bird Fiord Formation, contains 22 species of brachiopods that belong to 21 genera. This biota includes six new species: Gypidula mega, Spinatrypa (Isospinatrypa) parva, Desquamatia (Independatrypa) fortis, Nucleospira stelcki, Warrenella grinnellensis, and Cranaena briceae. Four genera (Arcticastrophia Li and Jones, 2002, Borealistrophia Li and Jones, 2002, Grinnellathyris Li and Jones, 2002, and Costacranaena Johnson and Perry, 1976) and 16 species of brachiopods are endemic to the Arctic Canada. Conversely, the fauna also includes European elements such as Nucleospira lens (Schnur), Spinatrypa (Isospinatrypa), and Warrenella. These taxa may indicate that there was some communication between the Canadian Arctic and Europe during Middle Devonian.

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42

Case, Ray. "Biochemical indicators of condition, nutrition and nitrogen excretion in caribou." Rangifer 16, no. 4 (January 1, 1996): 201. http://dx.doi.org/10.7557/2.16.4.1243.

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Urinary urea nitrogen to creatinine ratios, urinary Nt-methylhistidine to creatinine ratios, serum urea nitrogen concentrations (SUN mg/dl), and serum Nt-methylhistidine concentrations were compared with physical measures of body composition in adult female barren-ground caribou (Rangifer tarandus groenlandicus) from the Bathurst and Southampton Island herds during late winter. Body weight and UUC were used to estimate urinary urea nitrogen (urea-N) excretion in free ranging caribou. Only mean UUC reflected differences in fat reserves between populations. None of the biochemical indicators were directly related to body composition. However, elevated UUC were only observed in caribou with depleted fat reserves as demonstrated by low kidney fat index (KFK40) and/or reduced femur marrow fat (FMF<80). UUC greater than 0.25 were indicative of undernourished animals with depleted fat reserves. SUN and UN -MHC showed no clear relationship with fat reserves. The mean estimated daily urea-N excretion for adult female caribou in late winter was extremely low (0.11+0.01SE g urea-N/day, n=76, range=0.011-0.510). The results of my study suggest that UUC can be used to detect nutritionally stressed caribou with depleted fat reserves on lichen winter ranges.

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43

Noble, Paula J., Matthew K. Zimmerman, Chris Holmden, and Alfred C. Lenz. "Early Silurian (Wenlockian) δ13C profiles from the Cape Phillips Formation, Arctic Canada and their relation to biotic events." Canadian Journal of Earth Sciences 42, no. 8 (August 1, 2005): 1419–30. http://dx.doi.org/10.1139/e05-055.

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Geochemical data from the Cape Phillips Formation, Arctic Canada, are examined in association with three Silurian biotic crises in the graptolite community; the early Wenlockian Ireviken, mid Wenlockian Cyrtograptus lundgreni, and end Wenlockian Colonograptus ludensis extinction events. Positive δ13Corg excursions are associated with the Ireviken and C. lundgreni events, but not the Co. ludensis Event. The Ireviken and C. lundgreni excursions are recognized worldwide and are herein interpreted to be the result of carbonate weathering in response to eustatic sea-level drop. The C. lundgreni excursion is of greater magnitude in the more proximal basin margin section at Abbott River, Cornwallis Island, and is explained by the amplification of a more strongly positive δ13C signature in shallower parts of an epeiric basin during increased exposure and weathering of the carbonate shelf. Excursion C5, within the C. praedeubeli C. deubeli Zone, is also of regional significance, as it occurs in both the Abbott River section and Twilight Creek section on Bathurst Island, and is also recognized in Estonia, Poland, and England. Excursion C6 is recognized in the Gorstian Stage, yet its regional significance remains equivocal. There is a reasonable general agreement between the shape of the δ13Corg and δ13Ccarb curves, yet the δ13Ccarb curve is largely a record of detrital carbonate derived from the shelf. The δ13Corg curve represents extraction of dissolved inorganic carbon by plankton and thus is more indicative of ambient paleoceanographic conditions. These data are valuable in that they provide a detailed secular marine δ13C curve for the Wenlockian of Arctic Canada from relatively unaltered sections of varying facies whose ages are well constrained by graptolite biostratigraphy.

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44

West Jr., David P., Heather M. Beal, and Timothy W. Grover. "Silurian deformation and metamorphism of Ordovician arc rocks of the Casco Bay Group, south-central Maine." Canadian Journal of Earth Sciences 40, no. 6 (June 1, 2003): 887–905. http://dx.doi.org/10.1139/e03-021.

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The Casco Bay Group in south-central Maine consists of a sequence of Late Cambrian to Early Ordovician interlayered quartzofeldspathic granofels and pelite (Cape Elizabeth Formation) overlain by Early to Late Ordovician back-arc volcanic (Spring Point Formation) and volcanogenic sedimentary rocks (Diamond Island and Scarboro formations). These rocks were tightly folded and subjected to low-pressure amphibolite-facies metamorphism in the Late Silurian. This phase of deformation and metamorphism was followed by the development of a variety of structures consistent with a period of dextral transpression in Middle Devonian Early Carboniferous time. Previously dated plutons within the sequence range in age from 422389 Ma and record a period of prolonged intrusive activity in the region. Similarities in age, volcanic rock geochemistry, and lithologic characteristics argue strongly for a correlation between rocks of the Casco Bay Group and those in the Miramichi belt of eastern Maine and northern New Brunswick. The Cape Elizabeth Formation correlates with Late Cambrian to Early Ordovician sediments of the Miramichi Group (Gander Zone) and the Spring Point through Scarboro formations correlate with Early to Late Ordovician back-arc basin volcanics and volcanogenic sediments of the Bathurst Supergroup. The folding and low-pressure metamorphism of the Casco Bay Group is attributed to Late Silurian to Early Devonian terrane convergence and possible lithospheric delamination that would have resulted in a prolonged period of intrusive activity and elevated temperatures at low pressures. Continued convergence and likely plate reconfigurations in the Middle Devonian to Carboniferous led to widespread dextral transpression in the region.

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45

Whibley, Mike, and Ted Jacobson. "EXPLORATION IN THE NORTHERN BONAPARTE BASIN, TIMOR SEA - WA-199-P." APPEA Journal 30, no. 1 (1990): 7. http://dx.doi.org/10.1071/aj89001.

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Permit WA-199-P, located in the Northern Bonaparte Basin, has undergone an intensive exploration phase from its award on 22 October 1985, which has resulted in the acquisition of 6250 km of 2D seismic and 1558 km of 3D seismic together with the drilling of seven exploration wells. Significant oil shows were recorded in six of these wells.The major play type investigated to date within the permit consists of Jurassic tilted horst and fault blocks. Potential reservoirs comprising medium to coarse grained sandstones of the Jurassic Plover Formation and, to a lesser extent, the Late Jurassic to Early Cretaceous Flamingo Group, are sealed by massive claystones of the Cretaceous Bathurst Island Group. Numerous oil shows have been encountered by drilling within these two reservoirs; however, drilling results from the Avocet-Eider structure indicate that Late Miocene-Recent fault reactivation often breaches the lateral seal of the fault- dependent structures causing leakage of hydrocarbons up the fault.Source extract-oil correlations and maturation studies indicate that the most likely oil sources comprise thermally mature marine claystones of the Flamingo Group and Plover Formation, developed within the Sahul Syncline to the east of WA-199-P. The main period of oil migration was probably Miocene or younger. A number of play types remain untested. These consist of Permian, Intra-Triassic and top Cretaceous fault blocks, as well as fault-independent closures, downdip fault closures and stratigraphic wedge outs of Maastrichtian sand reservoirs, and submarine fan sands developed within the basal Flamingo Group.

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46

Chierici, M., and A. Fransson. "Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves." Biogeosciences 6, no. 11 (November 4, 2009): 2421–31. http://dx.doi.org/10.5194/bg-6-2421-2009.

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Abstract. In the summer of 2005, we sampled surface water and measured pH and total alkalinity (AT) underway aboard IB Oden along the Northwest Passage from Cape Farewell (South Greenland) to the Chukchi Sea. We investigated the variability of carbonate system parameters, focusing particularly on carbonate concentration [CO32−] and calcium carbonate saturation states, as related to freshwater addition, biological processes and physical upwelling. Measurements on AT, pH at 15°C, salinity (S) and sea surface temperature (SST), were used to calculate total dissolved inorganic carbon (CT), [CO32−] and the saturation of aragonite (ΩAr) and calcite (ΩCa) in the surface water. The same parameters were measured in the water column of the Bering Strait. Some surface waters in the Canadian Arctic Archipelago (CAA) and on the Mackenzie shelf (MS) were found to be undersaturated with respect to aragonite (ΩAr<1). In these areas, surface water was low in AT and CT (<1500 μmol kg−1) relative to seawater and showed low [CO32−]. The low saturation states were probably due to the likely the effect of dilution due to freshwater addition by sea ice melt (CAA) and river runoff (MS). High AT and CT and low pH, corresponded with the lowest [CO32−], ΩAr and ΩCa, observed near Cape Bathurst and along the South Chukchi Peninsula. This was linked to the physical upwelling of subsurface water with elevated CO2. The highest surface ΩAr and ΩCa of 3.0 and 4.5, respectively, were found on the Chukchi Sea shelf and in the cold water north of Wrangel Island, which is heavily influenced by high CO2 drawdown and lower CT from intense biological production. In the western Bering Strait, the cold and saline Anadyr Current carries water that is enriched in AT and CT from enhanced organic matter remineralization, resulting in the lowest ΩAr (~1.2) of the area.

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47

Chierici, M., and A. Fransson. "Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves." Biogeosciences Discussions 6, no. 3 (May 13, 2009): 4963–91. http://dx.doi.org/10.5194/bgd-6-4963-2009.

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Abstract. In the summer of 2005, we sampled surface water and measured pH and total alkalinity (AT) underway aboard IB Oden along the Northwest Passage from Cape Farwell (South Greenland) to the Chukchi Sea. We investigated variability of carbonate system parameters, focusing particularly on carbonate concentration [CO32−] and calcium carbonate saturation states, as related to freshwater addition, biological processes and physical upwelling. Measurements on AT, pH at 15°C, salinity (S) and sea surface temperature (SST), were used to calculate total dissolved inorganic carbon (DIC), [CO32−] and saturation of aragonite (ΩAr) and calcite (ΩCa) in the surface water. The same parameters were measured in the water column of the Bering Strait. Some surface waters in the Canadian Arctic Archipelago (CAA) and on the Mackenzie shelf (MS) were found to be undersaturated with respect to aragonite (ΩAr<1). In these areas, surface water was low in AT and DIC (<1500 μmol kg−1) relative to seawater and showed low [CO32−]. The low saturation states were probably due to the effect of dilution due from freshwater addition by sea ice melt (CAA) and river runoff (MS). High AT and DIC and low pH, corresponded with the lowest [CO32−], ΩAr and ΩCa, observed near Cape Bathurst and along the South Chukchi Peninsula. This was linked to physical upwelling of subsurface water with elevated CO2. Highest surface ΩAr and ΩCa of 3.0 and 4.5, respectively, were found on the Chukchi Sea shelf and in the cold water north of Wrangel Island, which is heavily influenced by high CO2 drawdown and lower DIC from intense biological production. In the western Bering Strait, the cold and saline Anadyr Current carries water that is enriched in AT and DIC from enhanced organic matter remineralization, resulting in the lowest ΩAr (~1.2) of the area.

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48

M. Driessen, Michael, and Stephen A. Mallick. "The vertebrate fauna of the Tasmanian Wilderness World Heritage Area." Pacific Conservation Biology 9, no. 3 (2003): 187. http://dx.doi.org/10.1071/pc030187.

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The Tasmanian Wilderness World Heritage Area encompasses an area of 1.38 million hectares, or approximately 20% of the island state of Tasmania. The World Heritage Area plays a significant role in the conservation of Tasmania's fauna and natural biological processes. The area supports 30 species of terrestrial mammal including three endemic species (91% of total Tasmanian species), 120 species of terrestrial bird including 10 endemic species (76% of state total), 14 species of terrestrial reptile including seven endemic species (67% of state total), seven species of frog including three endemic species (64% of state total), 16 species of freshwater fish including four endemic species (64% of state total), and 68 species of marine fish including one endemic species (14% of state total). A number of vertebrate species are entirely restricted to the World Heritage Area (Moss Froglet, Pedra Branca Skink, Mountain Skink, Pedder Galaxias, Swamp Galaxias and Western Paragalaxias, while the migratory Orange-bellied Parrot breeds only within the World Heritage Area. A number of other species have the majority of their Tasmanian range within the World Heritage Area (Broad-toothed Rat, Ground Parrot, Southern Emu-wren, Tasmanian Tree Frog, Northern Snow Skink, Southern Snow Skink, Bathurst Harbour Skate and the Clarence Galaxias). The World Heritage Area also supports a range of threatened mammal, bird, reptile and fish species. Of the 44 species of introduced vertebrates which have established feral populations in Tasmania, only seven species (16% of state total) have a significant presence within the World Heritage Area and pose a potential threat to the area's integrity. The diversity and endemism of the vertebrate fauna of the World Heritage Area reflects the Gondwanan origins of much of the fauna of western Tasmania, the repeated glaciation of the area during the Pleistocene, and subsequent pulses of speciation among certain taxa.

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49

Lalonde, Erik, and Georges Beaudoin. "Petrochemistry, hydrothermal alteration, mineralogy, and sulfur isotope geochemistry of the Turgeon Cu–Zn volcanogenic massive sulfide deposit, northern New Brunswick, Canada." Canadian Journal of Earth Sciences 52, no. 4 (April 2015): 215–34. http://dx.doi.org/10.1139/cjes-2014-0093.

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The Turgeon deposit is a mafic-type, Cu–Zn volcanogenic massive sulfide (VMS) deposit. It is hosted by Middle Ordovician pillow basalts of the Devereaux Formation of the Fournier Group within the Elmtree-Belledune inlier, near the Bathurst Mining Camp (BMC) in northern New Brunswick, Canada. The Turgeon deposit consists of two Cu–Zn massive sulfide lenses (“100m Zn”, “48-49”) composed of pyrite, chalcopyrite, pyrrhotite, and sphalerite, which are underlain by chalcopyrite–pyrite stockwork veins. Pyrite is overprinted and replaced by chalcopyrite in the stockwork and vent complex sulfide facies, where both minerals are enriched in Se and Co relative to pyrite and chalcopyrite in the massive pyrite and breccia sulfide facies. In, Se, and Co display a positive covariation with Cu, whereas Zn displays a positive covariation with Cd. Trace element geochemistry indicates that the host rocks are primarily tholeiitic basalts and andesites that have signatures between that of mid-ocean ridge basalt and island-arc tholeiite. The hanging wall rhyolite plots as an ocean ridge rhyolite and is geochemically similar to VMS-bearing FIIIa-type rhyolites. Hydrothermal alteration mineral assemblages in the footwall basalts proximal to mineralization are dominantly chlorite ± quartz in the stockwork zone, which is characterized by compositional gains in Fe and Mg and losses in Na and Ca. The chlorite-altered basalts and andesites have undergone up to 35% mass loss. Stockwork chlorite is an Fe-rich chamosite, whereas chlorite in the massive sulfides is a Mg-rich clinochlore. Chlorite geothermometry yields temperatures of 329–361 °C for chamosite and 246–286 °C for clinochlore. Sulfides at Turgeon have an average δ34SCDT of +6.9‰ (range: +5.8‰ to +10‰), indicating that sulfur was mostly derived from thermochemical reduction of Ordovician seawater sulfate. The Turgeon VMS deposit differs from those of the BMC, which is a reflection of their different tectonic settings; but it is similar to other mafic-type VMS deposits, such as the Betts Cove, Tilt Cove, and Rambler VMS deposits in Newfoundland, Canada.

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50

Rong-Yu, Li, and Brian Jones. "New brachiopod genera from Bird Fiord Formation (Devonian), arctic Canada." Journal of Paleontology 76, no. 4 (July 2002): 648–58. http://dx.doi.org/10.1017/s0022336000041925.

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Brachiopods are common in the lower part of the late Early to Middle Devonian Bird Fiord Formation that is a carbonate-clastic transition succession found in Arctic Canada. These brachiopods, which lived in a shallow, near-shore, marine environment, includes three new genera: Borealistrophia, Arcticastrophia, and Grinnellathyis. The strophomenid Borealistrophia, which is characterized by two pairs of straight side septa, prominent and thick socket ridges, a thick but short median septum, and a cordate ventral muscle field, is found in the Baad Fiord, Blubber Point, and Norwegian members on Bathurst, Devon, North Kent, and Ellesmere islands. The strophomenid Arcticastrophia, which is distinctive because of its stout transmuscle septa, its narrow and low medium septum, and elevated ventral muscle field, is found in the Baad Fiord Member on Bathurst and Devon islands. The athyridid Grinnellathyris, which is characterized by an imperforated cardinal plate and inverted U-shaped jugum, is found in the Baad Fiord Member on Bathurst, North Kent, and Devon islands. The similarities between Grinnellathyris and Johnsonathyris Savage, Eberlein, and Churkin, 1978, in terms of their shell size and internal structures, may indicate that the latter evolved from the former.

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Journal articles on the topic 'Bathurst Island'

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