Geochemical profile of till from Longlac, Ontario to Somerset Island

Abstract In carrying out a geotechnical survey of a proposed gas pipeline route from the Arctic Islands south to Longlac, Ontario, the Polar Gas Consortium contracted the drilling of several hundred 2- to 20-m-deep boreholes in drift and bedrock. Samples from these holes were made available to the Geological Survey of Canada, where they were subjected to stratigraphic and trace-element geochemical analyses. The geochemical characteristics of the clay and sand-sized heavy mineral fractions of till samples from these boreholes have been summarized in a series of geochemical profiles.From the proposed pipeline terminus at Longlac northward to the vicinity of God's River in Manitoba, tills contain significant amounts of Paleozoic carbonate rocks and Proterozoic sedimentary rocks derived from the Hudson Bay basin and lowlands. Within this section, two sites were enriched in base metals, indicating the possibility of local mineralization of possible economic interest.From God's River northward to Seal River, Manitoba, no evidence of local mineralization was noted. The heavy mineral fractions of the tills are universally enriched in Mn-rich siderite thought to originate on or in the Paleozoic section of the Hudson Bay lowlands.From Seal River northward to Thelon River, near Baker Lake, tills contain only components originating west of the Hudson Bay sedimentary basin. Near the Keewatin-Manitoba border, all till is enriched in uranium, which probably originates in the "young" porphyritic granites underlying much of the region, and produces a distinctive airborne radiometric anomaly.At the Thelon River, multiple till sections are variously enriched in Cr, Ni, U, Cu and Mo in the vicinity of a distinctive aeromagnetic anomaly.From Thelon River northward, several coincident zones of chromium and uranium enrichment are found where the line of boreholes crosses east-west-striking belts of volcanic, ultramafic and sedimentary rocks of the Prince Albert Group.The results of this study indicate that till tends to have characteristic element associations or concentrations over each of several broad regions along the pipeline route. These are related both to large-scale bedrock associations and to large-scale effects of glacial dispersal. In addition, the samples, collected more or less at random with respect to local bedrock geology, have intersected several small-scale geochemical anomalies that appear to be related to zones of mineralization of possible economic interest.
Keywords: Geochemistry, Till profiles, Polar Gas Consortium, Mineral exploration, Glacial deposits.
Full Access to Technical Paper
PDF version for $20.00
Search
Sort By:  Relevance
Showing results 1 - 8
Text
Publication: CIM Bulletin
Author(s): G.K. LEE, F.D. FRIEDRICH, H. WHALEY, I.C.G. OGLE
Issue: 822
Volume: 73
Year: 1980
Text
Summary: This paper will examine the role of debt and equity in project financing and will illustrate the impact on the return to the project sponsor of each type. Conventional debt sources will be examined, as will product purchaser advances, foreign export-import bank loans and lease financing. The paper will review guarantees, charges against the project, dividend restrictions and other commitments. It will also discuss various features of sales contracts and the degree to which they can assist in...
Publication: CIM Bulletin
Author(s): R.R. STONE
Keywords: Mineral economics, Financial options, Mine design, Debt, Equity, Leasing, Project financing.
Issue: 822
Volume: 73
Year: 1980
Text
Summary: This paper presents a summary compilation of current Canadian coal research projects in the areas of exploration, mining and preparation. The compilation forms the basis for a review of present operations and technology, and of current research efforts. General research areas, requirements and priorities are suggested along with a discussion on achieving the research goals in terms of funds, facilities and staff. The current level of research funding in these areas is assessed.
Publication: CIM Bulletin
Author(s): DAVID A. FAWCETT
Keywords: Geology, Geophysical exploration, Gravity surveys, Reefs, Pinnacle reefs, Seismographs.
Issue: 822
Volume: 73
Year: 1980
Text
Summary: Coal from Hat Creek, B.C., has been successfully beneflciated to remove ash while retaining calorific value by a dry electrostatic separation process using a fluidized bed for triboelec-trification. Two samples of Hat Creek coal used in the beneficiation experiments have been characterized particularly with respect to their mineral and clay content. The calorific value recovery exceeds the simple dry coal recovery because of the heat lost in altering the clay minerals of the ash fraction...
Publication: CIM Bulletin
Author(s): I.I. INCULET, R.M. QUIGLEY, M.A. BERGOUGNOU, J.D. BROWN
Keywords: Coal treatment, Electrostatic beneficiation, Hat Creek deposit, Triboelectrification, Fluidized beds, Separation towers.
Issue: 822
Volume: 73
Year: 1980
Text
Summary: Australia has almost twenty per cent of the Western World's low-cost uranium reserves, located mostly in the Alligator Rivers region of the Northern Territory. At present, only one uranium mill is operating in Australia, but a number of new mills are planned for the early 1980s.Details are given of Australian uranium mining and milling proposals and the measures taken to minimize their environmental impact. Major factors affecting environmental impact are discussed, including treatment of...
Publication: CIM Bulletin
Author(s): DESMOND M. LEVINS
Keywords: Uranium, Australia, Environmental control, Mary Kathleen mine, Ranger deposit, Nabarlek deposit, Yeelirrie deposit, Jabiluka deposit, Water management, Tailings, Alligator River ores.
Issue: 822
Volume: 73
Year: 1980
Text
Summary: The Lake George antimony deposit comprises a system of stibnite-bearing quartz veins that cut Silurian greywacke and slate. The stibnite-bearing ore zone is in part enveloped by a uraniferous zone.The ore-bearing quartz vein system occupies an easterly striking, gently north-dipping fracture system that cuts across north-northeasterly trending gently southwest-plunging, tight Acadian (early Middle Devonian) folds. This vein system continues at depth into a siliceous skarn zone intruded by...
Publication: CIM Bulletin
Author(s): C.J. MORRISSY
Keywords: Geology, Mineral deposits, Antimony deposits, Lake George deposit, New Brunswick, Stibnite, Uranium minerals.
Issue: 822
Volume: 73
Year: 1980
Text
Summary: Removal of radium from uranium tailings would substantially lessen their environmental impact because it would eliminate, or greatly reduce, the hazards arising from radon emanation, leaching of radium, dust dispersal and gamma radiation. A process is described to extract radium from tailings by leaching in 3M NaCl solution. The radium can be rapidly leached at ambient temperatures by either multi-stage contact in agitated vessels or washing on a tailings filter cake. Extraction efficiencies...
Publication: CIM Bulletin
Author(s): REGINALD K. RYAN, DESMOND M. LEVINS
Keywords: Uranium, Australia, Hydrometallurgy, Radium, Tailings, Environmental control, Leaching, Ion exchange.
Issue: 822
Volume: 73
Year: 1980
Text
Summary: Gravity profiles were established over five known Middle Silurian pinnacle reefs in Lambton County, southwestern Ontario. The profiles were approximately 3 km long, with stations every 60 m. Four fairly recent technological developments were used which now make the gravity method relatively efficient and inexpensive compared to the techniques available two decades ago. These are: (1) a LaCoste-Romberg model G gravimeter to measure the gravitational attraction with a sensitivity of 0.01 mgal;...
Publication: CIM Bulletin
Author(s): M.M. KAPNISTOS, D.T.A. SYMONS
Keywords: Geology, Geophysical exploration, Gravity surveys, Reefs, Pinnacle reefs, Seismographs.
Issue: 822
Volume: 73
Year: 1980
Powered by Coveo Enterprise Search