DRAFT A new 1:250k scale unified legend for Precambrian rocks in Manitoba MGS MGS o l g o i e c g a l a s b u o r t i v n e a y m 1 9 8 2 Summary The Manitoba Geological Survey (MGS) identified the need for a revised 1:250k scale bedrock geology legend that is applicable to the entire province of Manitoba. Most MGS field mapping programs are carried out at scales of around 1:20k or 1:50k. In order to display this type of information at 1:250k scale, unit shapes must be simplified and assigned to regionally representative rock units. Using the previous 1:250k legend ( ) Figure 1 for this purpose presented several problems. For example, some unit names were not consistently applied throughout the province, and some names had connotations that were not appropriate for all regions in which they occur. The revised 1:250k bedrock geology legend (Figure 2) imposes a more logical and consistent simplification of regional bedrock geology that can be applied province-wide and updated at the end of each geoscientific field program or compilation project. Some compromise was necessary in producing the revised legend. For example, overly simplified unit names (such as “metasedimentary rocks”) were retained for regions lacking more detailed information or interpreted geophysically (such as in areas below Paleozoic cover). Some effects of applying the revised legend are illustrated in . Both maps show regional Figures 3 and 4 bedrock geology in the Flin Flon - Athapapuskow Lake region. The legend beside Figure 3 comprises units mapped in the Flin Flon domain, including subdivisions by assemblages and other information relevant at the original 1:62,500 scale (note that the legends in Figures 1 and 3 are not equivalent). The legend applied to the same map area in Figure 4 has been simplified according to the revised 1:250k common legend. Note that MGS adoption of the new 1:250k bedrock geology legend does not: 1) Delete previous information. A user interested in a particular area may choose to view the original polygon metadata to see previous descriptors or legend assignments, or view other compilations such as the map shown in Figure 3. 2) Modify more detailed geoscience data. For example, units mapped at 1:20k or 1:50k scale are not restricted to the common 1:250k legend. 3) Remove the option to highlight local features. For example, ultramafic units too small to display at 1:250k scale will continue to be marked with point features wherever relevant. Figure 3: Bedrock geology of the Flin Flon - Athapapuskow Lake region (resized from original map at 1:62,500 scale; for comparison with Figure 4) ! ! ! !!!!!!!!!!!! ! ! ! ! ! ! ! ! ! ! !!!!!!!!! ! ! !!!!!! ! ! ! !!!!!! !! ! ! ! ! ! ! ! !! ! !!! !!!!!! ! !!!!!!! ! !!!!!!!!!!!! ! ! ! ! ! !! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!!! !!!!!!!!!!!!!!!!!!!!!!!! !! !!! ! !!!!! !!!!!!!!!!!!!!!!!!!!!!!! ! ! !!!!! ! !!!!! ! !!! ! ! ! ! !!! ! ! !!! ! ! !!!! !!! ! ! !! !!!! !! !!!! !! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! !! !! !! !!! !! ! !! ! ! ! ! ! !! ! ! !! ! ! ! ! ! ! !!!!!!!!!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! e e e e e e e e ! ³ A ! 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Map Sheet: FF-ATHA Flin Flon Domain Flin Flon area, Map 2010-1 (Simard et al., 2012) PROTEROZOIC Successor-arc and younger rocks Post-Missi Group Intrusive Rocks Granodiorite, diorite, gabbro, monzodiorite, tonalite Weherlite, serpennized ultramafic rocks, pyroxenite, hornblendite Weherlite, serpennized ultramafic rocks, pyroxenite, hornblendite Biote-augite meladiorite; porphyric gabbro, melagabbro Quartz-feldspar porphyry, massive to banded; granodiorite, quartz diorite Missi Group Sandstone Pebbly sandstone Pebble to cobble conglomerate, with minor interbedded sandstone and pebbly sandstone Pre-Missi Group intrusive rocks Granite, granodiorite and quartz diorite Flon Flon arc assemblage (>1.88 Ga) Synvolcanic Intrusive Rocks Quartz-phyric tonalite to leucotonalite, minor quartz diorite Gabbronorite Undivided Intrusive Rocks Felsic dikes and sills/intrusions, and possible flows, aphyric to sparsely quartz-plagioclase-phyric Mafic dikes and sills/intrusions, aphyric to plagioclase-phyric Cope Lake Volcanic Rocks Basalt flows, aphyric to plagioclase- and pyroxene-phyric; mafic volcaniclasc rocks Eastern Hook Lake Succession Rhyolite flows and flow breccia, quartz-phyric to aphyric Basalt flows, aphyric to sparsely plagioclase- and pyroxene- phyric; mafic and heterolithic volcaniclasc rocks Western Hook Lake Succession Mafic and heterolithic volcaniclasc rocks Rhyolite flows and flow breccia Basalt flows, aphyric to plagioclase- and pyroxene-phyric Douglas Formaon Mafic and heterolithic volcaniclasc rocks; aphyric to plagioclase-phyric pillowed basalt flows. Lewis Formaon Massive and pillowed basalt flows, plagioclase (>10%)- and pyroxene (>5%)-phyric; minor volcaniclasc rocks Hidden Formaon Heterolithic mafic volcaniclasc breccia; well-bedded tuff Massive and pillowed basalt flows, aphyric to plagioclase- phyric, and associated breccia; mafic to felsic volcaniclasc rocks Fe-Ti-P massive and pillowed basalt flows, amygdaloidal aphyric to sparsely plagioclase-phyric Flin Flon Formaon Rhyolite flows, massive, locally flow-banded, mostly quartz- and plagioclase-phyric; felsic volcaniclasc rocks Massive and pillowed aphyric to plagioclase-phyric basalt flows; mafic to felsic volcaniclasc rocks; minor rhyolite flows Mafic volcanicalasc rocks, mostly lapilli tuff and tuff breccia, plagioclase-crystal-rich; basalt flows and associated flow breccia Massive to bedded heterolithic lapilli tuff to tuff breccia, with localized heterolithic felsic breccia, and bedded mafic tuff; minor basalt flows Hamell Lake Volcanic Rocks Plagioclase-phyric basalt flows; aphanic to quartz- and plagioclase-phyric rhyolite flows; associated volcaniclasc rocks Unassigned Volcanic Rocks Mafic volcaniclasc rocks, heterolithoc volcaniclasc rocks, basalt flows, felsic and heterolithic volcaniclasc rocks Athapapuskow Lake area, Map GR2014-1-1 (Syme, 2015) PALEOPROTEROZOIC Tectonite Shear-zone rocks: mafic and felsic tectonite Northeast Arm shear zone Tectonite and mylonite with mafic and felsic intrusive rocks Mylonite pyroxenite and gabbro/quartz diorite 1.86 to 1.84 ga middle successor-arc volcanogenic sedimenatry and intrusive rocks; Missi Group siliciclasc rocks Post-Missi Group Intrusive Rocks Sparsely plagioclase-phyric trachyandesite sills Missi Group (1842-1847 Ma) Sandstone, tuffaceous sandstone, minor mudstone, siltstone Pebble conglomerate, polymicc pebble-cobble conglomerate, pebbly sandstone Pre-Missi Group intrusive rocks and intrusive rocks of unknown age Neso Lake pluton Pyroxenite, melagabbro, gabbro Pyroxenite, melagabbro, gabbro Diorite, gabbro, related intrusion breccia Biote-hornblende quartz diorite, related intrusion breccia Tonalite, quartz diorite Dikes, sills and minor intrusions Quartz diorite, gabbro Pyroxenite Pyroxenite Diabase Mafic plagioclase porphyry dikes Intrusion breccia with fine-grained mafic matrix; associated with leucotonalite-rhyolite Aphyric and porphyric rhyolite dikes; fine-grained leucotonalite Epiclasc and volcanogenic sedimentary rocks Conglomerate, pebbly wacke, greywacke 1.88 to 1.86 ga early successor-arc volcanic, sedimentary and intrusive rocks Mafic sills Quartz diorite, tonalite, magneferous ferrodiorite, feldspathic diorite Epiclasc, volcaniclasc and volcanic rocks Andesic and felsic greywacke; siliceous siltstone, mudstone; minor mafic pillowed flows Early juvenile-arc and ocean-floor (ca. 1.90 to 1.88 ga) rocks Intrusive rocks of arc affinity (1.90-1.88 Ga ) Plutons Pegmate, aplite Medium-grained, equigranular tonalite; quartz megacrysc tonalite Leucocrac tonalite intrusion breccia Gabbro Quartz diorite intrusion breccia; quartz diorite Minor intrusions Minor intrusions: gabbro, diorite, quartz diorite, tonalite, related breccias Intrusion breccia with quartz diorite to tonalite matrix, in part pegmac Quartz diorite, tonalite Gabbro, diorite: fine- to medium-grained, equigranular Volcanic rocks of arc affinity (1.90-1.88 Ga); associated volcaniclasc and sedimentary rocks Undivided volcanic and volcaniclasc rocks Heterolithic breccia Felsic and intermediate volcaniclasc rocks and associated sedimentary rocks Mafic volcaniclasc rocks: plagioclase crystal-lapilli tuff, pyroclasc breccia, pillow-fragment breccia Rhyolite flows Basalt, basalc andesite, andesite, associated pillow breccias Intrusive rocks of ocean-floor affinity (ca. 1.90 Ga ) Mafic and ultramafic sills and dikes Gabbro, diorite, fine- to medium-grained, equigranular; minor diorite and quartz diorite Diabase, fine- to medium-grained Peridote Mafic-ultramafic layered intrusions Gabbro, ultramafic rocks Gabbro, leucogabbro, gabbroic anorthosite, anorthosite Pyroxenite, peridote Volcanic rocks of ocean-floor affinity (ca. 1.90 Ga); associated volcaniclasc and sedimentary rocks Greywacke, mudstone, mafic tuff Mafic volcaniclasc rocks Undivided mafic flows Basalt, mostly aphyric Aphyric and plagioclase±pyroxene-phyric/glomeroporphyric basalt Pillowed basalt Athapapuskow basalt: massive flows, minor pillowed flows 1.90 to 1.88 ga contaminated arc rocks and rocks of unknown affinity (Mysc Lake assemblage) Felsic plutonic rocks: granite, quartz-megacrysc tonalite Felsic hypabyssal rocks: rhyolite; leucotonalite; aphyric and plagioclase-phyric diabase; aplite; pegmate Mafic volcaniclasc rocks: plagioclase-phyric crystal tuff, lapilli tuff, breccia Tectonically laminated mafic rocks derived from amygdaloidal basalt, diabase and mafic tuff. Neoarchean to Paleoproterozoic granitoid rocks containing ca. 2.5 ga zircons Granite NATMAP Shield Margin Project area, Map A-98-2 PROTEROZOIC Sedimentary, volcanic and hypabyssal intrusive rocks (1.87 to 1.83 Ga) Missi Metamorphic Suite Sandstone, siltstone, mudstone and derived quartzofeldspathic gneiss and migmate Polymicc conglomerate, sandstone, conglomerate gneiss, local psammic gneiss, undifferenated conglomerate and derived gneiss Rocks of Uncertain Age Mafic tectonite, phyllonite, mylonite, mafic phyllonite ± carbonate, cataclasite Greywacke, siltstone, mudstone, tuff; derived biote gneiss ± garnet ± sillimanite, quartzofeldspathic gneiss Intrusive rocks (1.88 to 1.83 Ga) Felsic tectonite, mylonite; felsic phyllonite, quartz-sericite ± carbonate schist Dykes and dyke complexes: aphyric and porphyric felsic- intermediate dykes; quartz- to feldspar- porphyry Granite Granite to granodiorite Syenite to monzonite Leucogranodiorite to tonalite Granodiorite to tonailte Granodiorite Granodiorite to tonailte Granodiorite to tonailte: xenolith-rich phase Foliated and gneissic granodiorite to tonailte Tonalite Leucotonalite Tonalite to quartz diorite Monzodiorite to quartz monzonite Quartz monzonite Monzodiorite to quartz monzodiorite Composionally layered gabbro, gabbronorite, ferrogabbro, quartz ferrodiorite, ferrotonalite, leucotonalite, melagabbro; heterogeneous mulphase gabbro, diorite Gabbro, diorite, quart diorite and derived amhibolite Gabbro, diorite Diorite Diorite to quartz diorite Diabase, diabase dyke complex Xenolith-rich gabbro to quartz diorite Amphibolite Volcanic, intrusive and sedimentary rocks (1.92 to 1.87 Ga) Juvenile Arc Rocks Undivided juvenile arc rocks Mafic to felsic hypabyssal intrusions Tonalite, quartz diorite Gabbro, diorite, porphyric diorite, diabase Composionally layered gabbro sills and intrusions Volcaniclasc rocks, calc-silicate rocks Shoshonic tuff, resedimented Felsic volcaniclasc rocks: tuff, lapilli tuff, breccia, heterolithologic breccia, dacite tuff Intermediate volcaniclasc rocks: tuff, lapilli tuff, breccia, intermediate to felsic volcaniclasc rocks and flows, derived gneiss Mafic volcaniclasc rocks: resedimented mafic tuff, lapilli tuff, breccia; mafic wacke; pillow fragment breccia; heterolithologic breccia, dominantly mafic fragments; undivided mafic volcaniclasc rocks and flows Rhyolite to dacite (flows, flow breccia) Arc-ri basalt (pillowed and massive flows): ferrobasalt, rhyolite crystal tuff; synvolcanic dykes and sills; gabbro, ferrogabbro, quartz ferrodiorite sills Basalt, basalc andesite (pillowed and massive flows): tholeiic basalt, basalc andesite, gabbro, derived amphibolite, calc-alkaline basalt, basalc andesite, boninite, layered to uniform amphibolite Evolved Arc Rocks Mysc Lake Assemblage Tonalite, granodiorite, diorite, intrusive sheets (rhyolite, quartz diorite, diabase), gabbro to diorite Ocean Floor Rocks Undivided ocean-floor rocks: mafic volcanic and related intrusive rocks, amphibolite, mafic tectonite Gabbro, diabase sills and dykes Evolved basalts: massive and pillowed basalt, diabase; gabbro, derived amphibolite MORB/back arc basin basalts: pillowed and massive basalt, diabase; derived tectonite, breccia; plagioclase megaphyric and aphyric basalt, gabbro; derived amphibolite Rocks of Unknown Genesis Mafic to felsic volcanic, volcaniclasc and hypabyssal intrusive rocks, derived mafic gneiss Clearwater Domain PROTEROZOIC Sedimentary, volcanic and hypabyssal intrusive rocks (1.87 to 1.83 Ga) Rocks of Uncertain Age Supracrustal migmac hornblende gneiss and interlayered hornblende-biote gneiss Intrusive rocks (1.88 to 1.83 Ga) Granite to granodiorite Granodiorite Tonalite to quartz diorite Gabbro, diorite, quart diorite and derived amhibolite Ultramafic rocks: pyroxenite, melagabbro, peridote, serpennite Volcanic, intrusive and sedimentary rocks (1.92 to 1.87 Ga) Ocean Floor Rocks Undivided ocean-floor rocks: mafic volcanic and related intrusive rocks, amphibolite, mafic tectonite Rocks of Unknown Genesis Mafic to felsic volcanic, volcaniclasc and hypabyssal intrusive rocks, derived mafic gneiss pB.8 pB.9 ajX ajT yG2 jV3.1 ajTl yU jV3.2 ajB.1 jT.1 yD ajD.1 jB yR ajBh jBl yS.1 ajTh jV4 yS.2 ajD.2 jVs4 yC ajB.2 jVf4 jVi4 yG1 ajV jVm4 ajV4.1 fsT jV1 ajV4.2 fsB jV3.3 ajV4.3 jV3.4 ajV1 fuDK4 ajV3.1 fuDK2 eT fcV3 aoB.1 oV3.1 aoB.2 Vp1 oB aoU.1 Vh3 oV3.3 aoB.3 oV3.4 V4 aoB.4 V1 uV3 V3 aoW fdV4 aoV4 wN1 aoV3 flVx3 aoVm3 pG1 fnV4 aoVp3 pG2.1 fnV3 aoVo3 pT fnVi3 aoAV3 pB ffV1 pU acGq1 ffV3 acGh1 ffVp4 fV3.1 acV4 ffV4 uV3 acV3 fmVp3 anG1 fuV3 atP mS.1 atPi mC wP wW asV2 asS pP asC pR pG1.1 pG1.2 asU.1 pG1.3 asD.1 pGl2.1 asD.2 pG2 asT pG2.1 pG2.2 asD.4 pG2.3 asU.2 pG2.4 asB.1 pT.1 asR pT.3 asTh pT.4 asV1 pZ3 pZ3.1 asC pZ3.2 pBl asD.5 pB asW pB.1 pB.3 pB.5 pB.6 Flin Flon--Athapapuskow 0 5 10 15 20 25 km km Legend Figure 4: Bedrock geology of the Flin Flon - Athapapuskow Lake region using revised 1:250k legend assignments (resized as in Figure 3) pBL pB pW pV3 pB pV pV1 pS pW pCP pT pV1 pGl pV3 pV3O pD pV3 pV1 pV3V pD pV3 pV3O pV3V pV3V pV1 pB pV3V pV3O pZ1 pV3O pB pV3V pB pV3V pV1 pZ1 pV3V pD pC pG pC pV3 pV3P pB pV3O pD pV pV3P pV3O pBL pV3V pD pB pB pR pG pB pT pV1P pV1 pV3V pV1V pZ3M pB pV3 pV1 pD pV3O pT pT pV3O pB pV3O pG pV1 pB pR pV3P pT pB pV3V pV3P pV1V pV3P pV2V pV1 pB pS pV1 pR pR pV pB pV3 pB pB pV3 pS pG pB pV3V pB pB pD pB pB pV3O pV3 pR pB pV3V pV3V pB pV3V pG pV3P pV3 pB pU pB pB pG pB pG pB pG pT pB pV3V pB pV3P pT pU pV pB pV3P pG pB pV3O pV3 pT pV1 pV3V pB pG pD pB pV3 pG pB pB pT pV1 pV3O pV2V pD pT pV3O pV3 pB pB pB pT pT pT pG pV1P pB pV pV3 pV3O pD pV3 pV1 pV3 pD pB pB pV1V pT pV3V pV3 pV3V pV1P pV1P pB pM pV3 pT pV3 pR pB pX pB pM pV1 pV3O pDt pD pG pV pV3 pV1P pU pX pT pT pV1 pV3O pG pB pM pV1 pB pD pDt pCP pW pV3 pV3V pB pV3V pT pZ2 pW pV1P pBL pCP pV3 pV3O pDt pV3P pM pW pV3 pV1 pB pV1P pV3 pU pW pV3P pW pB pV3V pD pV3P pT pW pT pT pZ3 pB pS pV3O pV3O pT pB pV3O pT pV3P pV3V pB pV3 pV3O pV3O pB pB pB pG pB pB pB pV3 pDt pW pA pU pZ3 pB pV3V pB pB pG pB pV3V pV2 pV3V pB pT pN1 pB pV3O pB pV3 pV3 pV3 pU pB pZ3M pV3 pB pG pG pB pB pB pB pB pB pG pV3 pV3O pT pB pV3P pV3V pV3P pV3V pM pG pV3O pV3P pV3V pV3O pD pV3V pV3O pT pB pR pV1 pS pT pB pT pV3V pG pT pZ1 pD pV3O pV1 pD pDt pV3O pV3 pV3 pV1P pB pB pCP pG pG pGN pCP pZ2 pV3 pGH pS pT pB pT pZ3M pG pM pG pG pB pG pT pB pV3O pV3O pT pS pBL pG pD pV1 pV3O pT pG pG pV3 pV3 pV3O pM pM pG pV3O pV3 pG pN1 pN1 pN1 pG pG pG pV3O pV3O pB pG pV3 Athapapuskow Lake Athapapuskow Lake Athapapuskow Lake Athapapuskow Lake Athapapuskow Lake Athapapuskow Lake Goose Lake Swordfish Lake Arthurs Lake Nesosap Lake Nesosap Lake Cliff Lake Bakers Lake Leo Lake Lile Rat Lake Timber Wolf Lake Thompson Lake Sucker Lake Whitefish Lake Bear Lake Bryan Lake Murray Lake Tapukok Lake Pothook Lake Sleep Lake Kinghorn Lake Milliken Lake White Lake Niyanun Lake Lucile Lake Persian Lake Nao Lake Nisto Lake Ledge Lake B. C. Lake Neso Lake Blackjack Lake Twin Lake Fox Lake Kelly Lake Dodds Lake Anvil Lake Payuk Lake Oer Lake Bond Lake Lynx Lake Newman Lake Naosap Lake Tartan Lake Aim?e, Lac Embury Lake Alberts Lake Alberts Lake Mikanagan Lake Big Island Lake Schist Lake Schist Lake First Cranberry Lake 102° 102° Flin Flon--Athapapuskow 0 5 10 15 20 25 km km Legend pS pW pC pCP pV pV1 pV1P pV1V pV2 pV2V pV3 pV3O pV3P pV3V pX pG pGl pGH pGN pZ2 pZ3 pZ3M pZ1 pR pT pD pDt pB pBL pU pA pM pN1 Sedimentary Rocks Quartzo-feldspathic sandstone Argillaceous sandstone to mudstone (e.g. turbidites) Conglomerate polymicc Volcanic Rocks & Derived Sediments Undifferenated volcanic rocks Felsic volcanic rocks porphyric volcaniclasc Intermediate volcanic rocks volcaniclasc Mafic volcanic rocks pillow basalt porphyric basalt volcaniclasc Intrusive Rocks Pegmate Granite to granodiorite leucocrac xenolith-bearing gneissic Syenite Monzodiorite to quartz monzodiorite monzodiorite to quartz monzonite Monzonite Felsic porphyric rocks (e.g. hypabyssal) Granodiorite to tonalite Diorite, quartz diorite diorite to tonalite Gabbro, diabase, diorite, norite composionally layered Ultramafic rocks Metamorphic Rocks Amphibolite Mylonite, tectonite, cataclasite Felsic gneiss Proterozoic pA Amphibolite g) garnet amphibolite h) amphibolite, diopside- &/or hornblende- bearing O) amphibolite with locally preserved pillow structures pB Gabbro, diabase, diroite, norite L) composionally layered gabbro pC Metaconglomerate h) hornblende bearing polymicc metaconglomerate N) gneissic metaconglomerate pD Diorite, quartz diorite m) magnete quartz diorite N) gneissic quartz diorite to granodiorite t) diorite to tonalite x) pyroxene diorite pE Enderbite x) gneissic ferrohypersthene enderbite pF Iron formaon o) oxide facies iron formaon s) silicate facies iron formaon pG1 Granite b) biote granite to granic gneiss f) granite, fluorite bearing g) garneferous granite to granodiorite H) hybrid granite h) hornblende granite, aplite l) leucocrac granite m) magnete granite, petmate N) gneissic granite to granodiorite, granic gneiss P) porphyric and megacrysc granite, leucogranite R) seriate to prophyric granite X) pegamc granite pG2 Granodiorite, granite, tonalite b) biote granodiorite H) hybrid granodiorite to granite gneiss h) hornblende granodiorite l) leucocrac granodiorite N) gneissic granodiorite to tonalite P) porphyric and megacrysc granodiorite to tonalite v) muscovite bearing granodiorite - granite pI Anorthosic gabbro, anorthosite pK Calc-silicate rock, marble, dolomic marble x) albite-pyroxene rock ± marble pM Mylonite, mylonic granitoid gneiss pN1 Felsic gneiss, migmate H) hybrid gneiss h) hornblende-bearing quartzofeldspathic gneiss m) magnete-bearing felsic orthogneiss N) semipelic paragneiss to metatexite with tonalite pN2 Intermediate gneiss pP Phyllonite, mylonite, tectonite, cataclasite, schist m) mudstone, subordinate arenite pQ Quartzite pR Quartz- to feldspar-porphyry pS Arenites: sandstone, siltstone, arkose, quartzofeldspathic paragneiss b) biote gneiss, meta-arkose h) hornblende bearing quartzofeldspathic gneiss m) magneferous quartzofeldspathic gneiss M) quartzofeldspathic migmate and migmac gneiss N) arkosic gneiss q) quartz arenite pT Tonalite to quartz diorite, granodiorite A) augen tonalite b) biote tonalite f) tonalite to granodiorite, fluorite-bearing H) hybrid tonalite, tonalic gneiss h) hornblende tonalite l) leucotonalite, leucocrac gneissic tonalite m) magnete tonalite to granodiorite N) gneissic to foliated tonalite to granodiorite g) gneissic garneferous tonalite-granodiorite P) megacrysc biote tonalite to granodiorite ±garnet x) clinopyroxene tonalite pU Ultramafic rocks pV Undifferenated volcanic rocks pV1 Rhyolite, dacite, pyroclasc rocks pV2 Intermediate volcanic rocks P) porphyric and aphyric basalt and andesite pV3 Pillowed to massive mafic volcanic rocks k) basalt and komaic basalt O) pillow basalt P) porphyric basalt pV4 Volcanicalsc rocks f) felsic volcaniclasc rocks i) intermediate volcaniclasc rocks m) mafic volcaniclasc rocks pW Greywacke and derived gneiss, migmate b) biote bearing greywacke and gneiss f) potassium feldspar bearing greywacke and gneiss g) garneferous gneiss, metagreywacke h) hornblende bearing greywacke-derived gneiss m) magnete bearing greywacke-derived migmate q) quartzofeldspathic greywacke, biote paragneiss t) staurolite metagreywacke, schist V) volcaniclasc greywacke pX Pegmate, pegmac granite pZ1 Monzonite, monzogranite h) hornblende bearing monzonite to quartz monzonite P) megacrysc monzonite to monzogranite pZ2 Syenogranite, syenite pZ3 Monzodiorite to quartz monzonite Proterozoic and/or Archean uA Amphibolite uB Gabbroic and mafic dykes (Molson Swarm) uC Conglomerate, volcanic derived (probably Archean) uG1 Granite, leucogranite N) foliated granite, leucogranite uG2 Granodioric gneiss to diatexite N) foliated granodioric gneiss uN Felsic to tonalic gneiss A) augen gneiss b) biote ± hornblende gneiss L) layered migmate gneiss, migmate uS Metasedimentary rocks uT Tonalite, tonalic gneiss uU Ultramafic rocks, largely serpennized peridote uV3 Mafic to ultramafic metavolcanic rocks Archean aA Amphobolite, layered amphibolite d) garnet-diopside amphibolite f) amphibolite to gabbro, plagioclase porphyric g) amphibolite, garnet bearing, locally layered L) layered amphibolite, metagabbro, gneiss x) pyroxene amphibolite aB Gabbro, layered metagabbro, diabase dykes a) anorthosic gabbro f) plagioclase-phyric gabbro (agmate) h) hornblende gabbro P) porphyric gabbro, diabase x) pyroxene-phyric gabbro aC Metaconglomerate, polymicc conglomerate V) volcanic conglomerate X) conglomerate with pegmac granite and pegmate aD Diorite, quartz diorite, tonalite h) diorite, quartz diorite, biote+hornblende- bearing q) quartz diorite aE Enderbite, enderbic gneiss N) enderbic gneiss g) enderbic gneiss, garnet bearing S) schollen enderbite aG1 Granite, leucocrac granite, quartz monzonite A) augen granite b) biote granite to granodiorite h) hornblende-biote granite H) xenolith bearing granite, granodiorite k) microcline granite l) leucogranite N) gneissic granite to granodiorite gneiss P) porphyric and porphyroblasc granite X) pegmac granite, pegmate aG2 Granodiorite, tonalite, quartz diorite A) augen granodiorite; felsic augen gneiss b) biote granodiorite H) hybrid granodiorite to granic gneiss h) hornblende-bearing granodiorite l) leucogranodiorite N) gneissic granodiorite to gneissic tonalite, locally migmac P) porphyric, porphyroblasc, and megacrysc granodiorite x) pyroxene granodiorite, gabbro X) pegmate aH Chloritoid schist aI Anorthosite, anorthosic gabbro aM Migmate: mixture of granodiorite gneiss to tonalite gneiss, granite, tonalite aN1 Granic and granodioric gneiss, migmate D) laminated felsic gneiss g) garneferous quartzofeldspathic gneiss X) felsic gneiss with abundant pegmate and aplite aN2 Intermediate layered to migmac gneiss M) migmac paragneiss h) hornblende gneiss m) mesocrac to melanocrac layered gneiss aN3 Mafic gneiss, in part migmac N) migmate, hornblende and hornblende- biote gneiss aO1 Felsic to intermediate granulite, opdalite, enderbic gneiss P) porphyric opdalite aO2 Mafic granulite aP Metamorphosed shale and silty shale p) pyriferous siltstone and shale aQ Quartzite aR Felsic porphyry f) plagioclase porphyry q) quartz porphyry aS Arenites: quartz-plagioclase paragneiss, sandstone, biote gneiss, arkose q) quartz arenite, minor mudstone, conglomerate x) biote gneiss with pyroxene aT Tonalite to granodiorite, with tonalic to granodioric gneiss A) augen tonalite b) biote tonalite g) tonalic granofels H) hybrid tonalite, tonalic gneiss h) hornblende tonalite L) tonalite to tonalic gneiss, layered l) leucotonalite N) geneissic tonalite to tonalic gneiss P) porphyric tonalite x) hypersthene tonalite Y) mylonic tonalite aU Ultramafic rocks k) komaite, komaic basalt s) ultramafic to mafic rocks, sapphirine bearing aV1 Felsic volcanic rocks F) volcanic fragmental rocks, related sediments P) porphyric rhyolite Y) mylonic volcanic rocks aV2 Intermediate volcanic rocks aV3 Mafic volcanic Rocks F) mafic volcanic fragmental rocks, related sediments O) pillowed basalt P) mafic plagioclase-phyric flows aV4 Volcaniclasc rocks and related sedimentary rocks f) felsic volcaniclasc rocks i) intermediate volcaniclasc rocks aW Metagreywacke N) amphibolite-biote-garnet gneiss T) tuffacious greywacke aX Pegmate, aplite aZ1 Quartz monzonite x) hypersthene granite (monzocharnockite) H) hypersthene granite and hybrid granite, gneiss aZ2 Syenite aZ3 Monzodiorite x) monzodiorite, pyroxene-bearing Figure 1: Previous 1:250k scale bedrock geology legend pS pSb pSh pSm pSq pW pC pCM pCP pF pFo pFs pK pKx pP pV pV1 pV1P pV1V pV2 pV2V pV3 pV3b pV3O pV3P pV3V pX pXg pXm pG pGb pGf pGg pGh pGl pGo pGH pGN pGP pGX pZ2 pZ2q pZ3 pZ3x pZ3M pZ1 pZ1h pR pT pTf pTl pTo pTH pD pDg pDm pDt pDx pB pBK pBL pBM pBP pI pU pY pA pAL pM pN1 pN2 pN3 uC uW uV uV1 uV2 uV2O uV3 uG uGl uGN uT uB uU uY uA uN aS aSb aSh aSm aSq aW aC aCM aCP aF aFo aFs aK aP aV aV1 aV1P aV1V aV2 aV2V aV3 aV3b aV3k aV3O aV3P aV3V aX aXg aXm aG aGb aGf aGg aGh aGl aGo aGH aGN aGP aGX aZ2 aZ2q aZ3 aZ3x aZ3M aZ1 aZ1h aR aT aTf aTl aTo aTH aTN aD aDg aDm aDt aDx aB aBL aBP aI aU aY aA aAL aM aN1 aN2 aN3 Proterozoic Sedimentary Rocks Quartzo-feldspathic sandstone biote-bearing hornblende-bearing magnete-bearing quartz sandstone Argillaceous sandstone to mudstone (e.g. turbidites) Conglomerate monomicc polymicc Iron formaon oxide facies silicate facies Calc-silicate rock, marble, dolomic marble albite-pyroxene rock +/- marble Mudstone Volcanic Rocks & Derived Sediments Undifferenated volcanic rocks Felsic volcanic rocks porphyric volcaniclasc Intermediate volcanic rocks volcaniclasc Mafic volcanic rocks basalt and komaic basalt pillow basalt porphyric basalt volcaniclasc Intrusive Rocks Pegmate granic mafic Granite to granodiorite biote-bearing fluorite-bearing garnet-bearing hornblende-bearing leucocrac orthopyroxene-bearing (charnockite to opdalite) xenolith-bearing gneissic seriate or porphyric pegmac Syenite quartz syenite Monzodiorite to quartz monzodiorite pyroxene-bearing monzodiorite monzodiorite to quartz monzonite Monzonite hornblende monzonite to quartz monzonite Felsic porphyric rocks (e.g. hypabyssal) Granodiorite to tonalite fluorite-bearing leucocrac orthopyroxene-bearing tonalite (enderbite) xenolith-bearing Diorite, quartz diorite (quartz) diorite to granodiorite magnete-bearing diorite to tonalite pyroxene-bearing Gabbro, diabase, diorite, norite mafic dikes (MacKenzie) composionally layered mafic to ultramafic dikes (dominantly Molson) porphyric Anorthosic gabbro, anorthosite Ultramafic rocks Metamorphic Rocks Metasedimentary rocks Amphibolite layered amphibolite Mylonite, tectonite, cataclaste Felsic gneiss Intermediate gneiss Mafic gneiss Proterozoic / Archean Sedimentary Rocks Conglomerate Argillaceous sandstone to mudstone Volcanic Rocks & Derived Sediments Undifferenated volcanic rocks Felsic volcanic rocks Andesite, interlayered tuff, minor basalt pillowed andesite Mafic to ultramafic volcanic rocks Intrusive Rocks Granite to granodiorite leucocrac gneissic Granodiorite to tonalite Gabbro, diabase, diroite, norite Ultramafic rocks Metamorphic Rocks Metasedimentary rocks Amphibolite Felsic gneiss Archean Sedimentary Rocks Quartzo-feldspathic sandstone biote-bearing hornblende-bearing magnete-bearing quartz sandstone Argillaceous sandstone to mudstone (e.g. turbidites) Conglomerate monomicc polymicc Iron formaon oxide facies silicate facies Calc-silicate rock, marble, dolomic marble Mudstone Volcanic Rocks & Derived Sediments Undifferenated volcanic rocks Felsic volcanic rocks porphyric volcaniclasc Intermediate volcanic rocks volcaniclasc Mafic volcanic rocks basalt and komaic basalt komaite and komaic basalt pillow basalt porphyric basalt volcaniclasc Intrusive Rocks Pegmate granic mafic Granite to granodiorite biote-bearing fluorite-bearing garnet-bearing hornblende-bearing leucocrac orthopyroxene-bearing granodiorite xenolith-bearing gneissic seriate or porphyric pegmac Syenite quartz syenite Monzodiorite to quartz monzodiorite pyroxene-bearing monzodiorite monzodiorite to quartz monzonite Monzonite hornblende-bearing monzonite to quartz monzonite Felsic porphyric rocks (e.g. hypabyssal) Granodiorite to tonalite fluorite-bearing leucocrac orthopyroxene-bearing tonalite (enderbite) xenolith-bearing gneissic Diorite, quartz diorite (quartz) diorite to granodiorite magnete-bearing diorite to tonalite pyroxene-bearing Gabbro, diabase, diorite, norite composionally layered porphyric Anorthosic gabbro, anorthosite Ultramafic rocks Metamorphic Rocks Metasedimentary rocks Amphibolite layered amphibolite Mylonite, tectonite, cataclasite Felsic gneiss Intermediate gneiss Mafic gneiss Figure 2: Revised 1:250k scale bedrock geology legend (draft) L. Chackowsky, T. Martins, M. Rinne, C. Couëslan and C. Böhm Manitoba Geological Survey