Moose River Basin: geology and mineral potential - Geology Ontario

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Moose River Basin 3.4-Hornblende-pyrite relationships, drillhole 75-02 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 3.5-Hornblende-pyrite relationships, drillhole 75-06 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 3.6-Basinal cross section from drillhole information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 3.7-Location of samples studied, 1975 drillholes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 TABLES 3.1-Sand sample intervals, 1975 drillholes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 3.2-Petrographic comparison of units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 52
Petrography of Mesozoic and Pleistocene Sands ABSTRACT Study of Mesozoic and Pleistocene sands from drillholes in the James Bay Lowland indicates that their petrography may be used to differentiate four sedimentary units. Properties of colour, sorting, roundness, sphericity, purity, grain size, clay, organic and carbonate contents, granule li thology, calcite-dolomite ratios and heavy mineral assemblages are important. The Middle Juras sic Mistuskwia Beds consist of grey, calcareous, sorted, rounded, spherical, fine to medium, pure quartz sand without organics and may be second-cycle sediments. Lower Cretaceous Mattagami Formation sands are divided into older, white, calcareous, sorted, angular, spherical, medium, pure quartz sand with abundant lignite fragments and authigenic pyrite, and younger, white, sorted, angular non-spherical, fine, very pure quartz sand with abundant kaolin. Pleistocene sand is char acterized as calcareous, unsorted, angular and impure, with little matrix, no organics and variable granule lithology. Heavy mineral suites for these units have been determined, and an inverse rela tion between blue-green hornblende and authigenic pyrite was identified. INTRODUCTION Stratigraphically useful criteria were sought to distinguish unlithified Pleistocene, Lower Cretaceous, and Middle Jurassic sands known to occur in the subsurface of the Moose River Basin. Various parameters of sedimentary petrography, including heavy mineral analyses, carbonate analyses, and grain descriptions were used and additional details were determined in the petrogra phy and extent of the Mattagami Formation, and the newly-defined Mistusk wia Beds (Telford et al. 1975; Telford, this report). In a drillhole, if Cretaceous sands are overlain by Pleistocene sands rather than till, the two may be difficult to distinguish. For many years the Matta gami Formation was included in the Pleistocene, until Bell (1928) demon strated by paleobotany that sediments of Mesozoic age were present. The Mat tagami Formation and Mistuskwia Beds also have similar lithologies and placing contacts has been tentative. The only fossils contained in these Meso zoic deposits are a few lignitized twigs and branches, and palynomorphs requir ing extensive specialized study. The unconformity between Pleistocene and Cretaceous sequences spans probably 100 million years while that between the Lower Cretaceous and Middle Jurassic is about 60 million years and both are accompanied by palynological "gaps". The objective of this study was to estab lish petrographical "gaps" at the contacts, if they exist, and define criteria to differentiate the units in field examination. Sand samples taken from four of six Ontario Geological Survey winter 1975 drillholes consisted of the finer fraction of interval samples from selected are naceous segments of drillholes 75-02,75-03,75-05, and 75-06 (Table 3.1). Five days of helicopter-supported field work allowed examination and sam pling of a few Cretaceous outcrops in the southern Moose River Basin, includ- 53
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THESE TERMS GOVERN YOUR USE OF THIS
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Ontario Geological Survey Study 21
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FOREWORD MOOSE RIVER BASIN The Meso
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CONVERSION FACTORS FOR MEASUREMENTS
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In order to maximise the use of sam
Page 12 and 13: Moose River Basin ABSTRACT The vast
Page 14 and 15: Moose River Basin the Paleozoic and
Page 16 and 17: Moose River Basin definitely whethe
Page 18 and 19: Moose River Basin the Onakawana are
Page 20 and 21: Moose River Basin Onakawana were di
Page 22 and 23: History of Geological Exploration f
Page 24 and 25: Moose River Basin mounted Acker dri
Page 26 and 27: Moose River Basin REFERENCES Aquita
Page 28 and 29: Moose River Basin Henley, T.J., and
Page 30 and 31: Moose River Basin Shawinigan Engine
Page 32 and 33: Moose River Basin 2.6-Log of drillh
Page 34 and 35: Moose River Basin Figure 2.1-Geolog
Page 36 and 37: Moose River Basin Drillhole Locatio
Page 38 and 39: Moose River Basin garni and Abitibi
Page 40 and 41: Moose River Basin quite irregular i
Page 42 and 43: Moose River Basin OGS10456 Photo 2.
Page 44 and 45: Moose River Basin OGS10458 Photo 2.
Page 46 and 47: Moose River Basin DEPTH METRES FEET
Page 48 and 49: Moose River Basin by Hamblin (this
Page 54 and 55: Moose River Basin DEPTH ELEVATION 9
Page 56 and 57: Moose River Basin sediments of the
Page 58 and 59: Moose River Basin vicinity of drill
Page 60 and 61: Moose River Basin Scintex Surveys L
Page 64 and 65: Moose River Basin TABLE 3.1 SAND SA
Page 66 and 67: Moose River Basin The Missinaibi Ri
Page 68 and 69: Moose River Basin clay and sand of
Page 70 and 71: Moose River Basin DRILLHOLE 75-02 S
Page 72 and 73: Moose River Basin PERCENTAGE 57 59
Page 74 and 75: Moose River Basin PERCENTAGE 20 30
Page 76 and 77: Moose River Basin clays, carbonate,
Page 78 and 79: Moose River Basin sin. Samples 185
Page 80 and 81: Moose River Basin blue-green hornbl
Page 82 and 83: ^J- C 3 heavy minerals-amo assembla
Page 84 and 85: 75-02 75-03 75 -05 75 -06 DEPTH LOG
Page 86 and 87: Moose River Basin dium coarse grain
Page 88 and 89: Moose River Basin sand with some gr
Page 90 and 91: Moose River Basin 101 - well sorted
Page 92 and 93: Moose River Basin APPENDIX B All mi
Page 94 and 95: Moose River Basin strong pleochrois
Page 96 and 97: Moose River Basin HEAVY MINERAL ANA
Page 98 and 99: Moose River Basin DRILLHOLE 75-06 d
Page 100 and 101: Moose River Basin DRILLHOLE 75-05 D
Page 102 and 103: Moose River Basin Telford, P.O., M.
Page 104 and 105: Moose River Basin ABSTRACT Disperse
Page 106 and 107: Moose River Basin floras from which
Page 108 and 109: Moose River Basin Erlansonisporites
Page 110 and 111: Moose River Basin Biretisporitespot
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Moose River Basin Cicatricosisporit
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Moose River Basin Cicatricosisporit
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Moose River Basin MOOSE RIVER BASIN
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Moose River Basin Plate 1. All figu
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Moose River Basin Plate 2. All figu
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Moose River Basin Plate 3 All figur
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Moose River Basin Plate 4 All figur
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23 24 Mesozoic Palynology
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Mesozoic Palynology 10 fe. 11 12 13
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24 25 26 Mesozoic Palynology
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Mesozoic Palynology 10 11 12 13 14
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Mesozoic Palynology 23 125
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Mesozoic Palynology
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Mesozoic Palynology 10 11 13 14 15
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Mesozoic Palynology REFERENCES Bell
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Mesozoic Palynology Williams, G.L.
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Moose River Basin Moose River Basin
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Moose River Basin examined..." and
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Moose River Basin The Onakawana Lig
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Moose River Basin o Q. 0) T3 O) 142
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Moose River Basin In samples of lig
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Moose River Basin Figure 5.4-Map sh
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Moose River Basin CHAUSSE CREEK, OP
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Moose River Basin DRILLHOLE 75-05 T
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Moose River Basin more is to be gai
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Lignite and Industrial Mineral Reso
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DRILLHOLE 75-03. Lignite and Indust
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INDEX PAGE Abitibi River . . . . .
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PAGE Pleistocene-Mesozoic contact.
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Moose River Basin REFERENCES Aquita
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21 22 24 25 26 28 30
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11 12 13 14 16 17 18 19 23 25
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10 11 12 13 14 15 ' 4 16 17 18 19 2
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Moose River Basin: geology and mineral potential - Geology Ontario

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