Uranium ore-forming systems of the - Geoscience Australia

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Uranium ore-forming systems of the Lake Frome regionMap Symbol Stratigraphic Name Stratigraphic DescriptionLw19 Unnamed GIS Unit - see description Schist, aluminous/carbonaceous/chloritoid . Based on unitProt-wk on CURNAMONALw2 Unnamed GIS Unit - see description Migmatite,gneiss,granitoids. Based on Prot-wm onCURNAMONA and OLARYLw9 Unnamed GIS Unit - see description Quartz-magnetite+/-albite rock,sulfides,barite. Based on unitf on OLARYLwb Broken Hill Group Ironstone; sulfide rich; marble; plagioclase richmetasediment; calc-silicate; siliciclastic pelite; BIF;amphibolite, variably brecciated.Lwbmb Bimba Sulfide Member Ironstone, sulfide-rich; banded iron silicate formation; thinunits and lenses of calcsilicate; marble; calc-albitite;plagioclase-rich metasediment in graphitic psammitic-peliticmetasediment.Lwt Thackaringa Group Gneiss, quartz-feldspar-biotite, foliated; calc-albitite andquartz-plagioclase rich metasediment; metavolcanics1699+/-10 Ma; ironstone; calc-silicate; minor Pb-Zn-Ag-Cumineralisation; minor amphibolite.M Unnamed GIS Unit - see description Undifferentiated Mesoproterozoic rocks.M1 Unnamed GIS Unit - see description Syn- to late tectonic granite to adamellite; pegmatoids.Based on Prot-gamma on OLARY and CURNAMONAM4 Unnamed GIS Unit - see description Undifferentiated amphibolite. Based on Prot-beta1 onOLARYM5 Unnamed GIS Unit - see description Metabasalt with pillow structures. Based on Prot-v2 onCURNAMONAM6 Unnamed GIS Unit - see description Trachyte metavolcanics, often porphyritic. Based on Prot-v1on CURNAMONAM7 Unnamed GIS Unit - see description Metasiltstone, shale, greywacke. Based on Prot-m onCURNAMONAM-fc Corundum Creek Schist Member Schist, sandy; quartzite; muscovite-biotite and corundumspinelschists.Mm Moolawatana Suite Felsic intrusive rocks.mm Unnamed GIS Unit - see description Man-made materials: for example fill, dumps, concrete.Mmb Box Bore Granite Granite, coarse-grained, alkaline, potassic and foliated. Withfluorite and allanite accessory minerals.Mmt Terrapinna Granite Granite, grey, ovoid K feldspar megacrysts.M-n Mount Neill Granite Granite, red-weathering, K feldspars.N Unnamed GIS Unit - see description Undifferentiated Neoproterozoic rocks.Nal Wooltana Volcanics Metasediments; marble; trachyte;sandstone; schist;phyllite;bsasl conglomerate.Nau Cutana beds Quartzite; schist; siltstoneNaw Wywyana Formation Calcsilicate; marble; actinolite amphibolite.Nb Burra Group Siltstone, laminated; shale; sandstone, heavy minerallamination, quartzose to feldspathic, cross bedding;dolomite, blue-grey to pale pink, lenticular.Page 143 of 151
Uranium ore-forming systems of the Lake Frome regionMap Symbol Stratigraphic Name Stratigraphic DescriptionNc Callanna Group Siltstone, locally carbonaceous; sandstone, locallystromatolitic, ripple marks, halite casts, heavy minerallamination; carbonates; evaporites; basalt, minor acid andintermediate volcanicsnd Unnamed GIS Unit - see description No description or log available (sample may or may not havebeen recovered)Nds Saddleworth Formation Mudstone; siltstone; shale, partly carbonaceous.NE Unnamed GIS Unit - see description Undifferentiated Proterozoic and/or Cambrian rocksNee Elatina Formation Sandstone, arkosic, medium grained, red-brown, slumped,ripple cross laminated; siltstone, sandy, red, dropstones andminor beds of diamictite with cobble to boulder size clasts ofdolomite, basalt, dolerite, tuff.Nia Angepena Formation Siltstone, reddish, thin bedded; interbeds of dolomite andminor grey-green shale; pisolitic and algal limestone.Nib Amberoona Formation Shales, green, finely laminated, silty; with purple and greysilty shale.Nie Enorama Shale Shale, grey-green and minor red, laminated; silty shale, rarefine grained sandstone.Nir Tarcowie Siltstone Siltstone, sandy, flaser bedded.Nirc Cox Sandstone Member Sandstone, coarse-grained; sandstone medium to finegrained,with siltstone.Niru Uroonda Siltstone Member Siltstone, grey-green, coarse; bands of coarse quartziticsiltstone.Nit Etina Formation Limestone, sandy, grey, oolitic, stromatolitic, trough crossbedding; interbedded with siltstone, grey-green. Local diapirderived conglomerate.Niy Yankaninna Formation Siltstone, grey-green, thinly bedded, calcareous, with lensesof dolomite.Niz Trezona Formation Limestone, intraclastic and stromatolitic; with interbeds ofcalcareous siltstone.Nk1 Unnamed GIS Unit - see description Siltstone rafts in diapirs. Based on red-dashed white unit onCOPLEYNk3 Unnamed GIS Unit - see description Shale rafts in diapirs. Based on blue-dashed white unit onCOPLEYNk4 Unnamed GIS Unit - see description Quartzite/sandstone rafts in diapirs. Based on blue-dottedwhite unit on COPLEYNkn Niggly Gap beds Siltstone, micaceous; sandstone; dolomite.Nl Belair Subgroup Siltstone, dark grey, laminated with minor sandstone,dolomite interbeds; quartzite, fine to coarse, feldspathic,cross bedded, minor siltstone interbeds; slateNms Skillogalee Dolomite Dolomite; marble, with magnesite mud-pellet conglomerates.Nnb Balcanoona Formation Dolomite, pale grey; limestone, dark grey, algal, oolitic.Page 144 of 151
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