Glacial dispersion of barite in till near Matachewan, Ontario

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Authors:Stewart, R. A.
Author Affiliations:Primary:
Iowa State Univ., Dep. Earth Sci., Ames, IA, United States
Volume Title:Prospecting in areas of glaciated terrain 1986
Volume Authors:Phillips, W. J., chairperson
Source:Prospecting in Areas of Glaciated Terrain, Vol.7, p.261-269; Seventh international prospecting in areas of glaciated terrain symposium, Kuopio, Finland, Sept. 1-2, 1986, chaired by W. J. Phillips. Publisher: Institution of Mining and Metallurgy, London, United Kingdom. ISSN: 0141-3376. ISBN: 0-900-488-913
Publication Date:1986
Note:In English. 31 refs.; illus. incl. 1 table, sketch map
Summary:A massive baryte vein 95 m long and <5 m wide occurs atop a glacially streamlined hill of syenite adjacent to Browning Lake, in the Matachewan mining district. Subglacial till, sampled systematically from an exploration trench excavated down-glacier from the vein, over a distance of 48 m, was analysed petrographically for baryte in six size fractions in the pebble and sand grades. The distribution of baryte in the head of the dispersal train (within 20 m of the vein) is governed by abrasion and plucking of the vein itself; baryte here enriches mainly the finer grades of sand. Till deposited in the tail of the train (20-48 m down- glacier) contains greater amounts of the coarser grades of sand, and less fine baryte eroded directly from the vein, in response to the persistence of coarser baryte and its subsequent comminution to finer grades and dilution with syenitic debris. The variation of baryte with distance from the vein obeys a negative exponential function with a high degree of correlation (R2) for all sand fractions but the finest. [J.M.H.]
Subjects:Barite deposits; Clastic sediments; Economic geology; Erosion; Geological methods; Glacial transport; Glaciated terrains; Mineral exploration; Provenance; Sedimentation; Sediments; Till; Transport; Canada; Eastern Canada; Ontario; Matachewan
Abstract Numbers:87M/2915
Record ID:1987022003
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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