 | | Journal (article/letter/editorial) | | Geology, v. XXX, no. XX, pp. X–X EXPRESS LETTER ROSEN, BULGARIA: A NEWLY RECOGNIZED IRON OXIDE-COPPER-GOLD...Capital Inc., 6th September Street 13A, Sofia 1000, Bulgaria of Earth and Atmospheric Sciences, University...T6G 2E3, Canada Abstract The Rosen copper veins in southeastern Bulgaria are recognized for the first...along the western contact of the syenite-dominated Rosen pluton, inferred to be part of a large ring dike... and carbonates but also quartz, chalcopyrite, pyrite, and numerous other metallic minerals, which combine |  | | Journal (article/letter/editorial) | | to the Balkans-Srednogorie, an Upper Cretaceous, ore bearing igneous belt: a narrow elongated body which...Serbia and still further East to Srednogorie (Bulgaria). This results in a belt of 750 km/30-70 km, bending...bending from N-S in Romania and Serbia, to E-W in Bulgaria. Using the well established century-old terminology...BMMB of the Carpathian-Balkan fold belt is rich in ore deposits related to plutons and/or volcano-plutonic...complicates the approach, as to OF Romania, Serbia and Bulgaria, where the SCMOLDOVA BS belt outcrops, regions |  | Schofield, Marina D., Gibson, Harold.L., Lafrance, Bruno, Poulsen, K. Howard, Marsh, Jeffrey, Hamilton, Michael A., Jørgensen, Taus R.C. (2021) Recognizing subsurface breccias in Archean terranes: Implications for district scale metallogeny. Precambrian Research, 361. 106264pp. doi:10.1016/j.precamres.2021.106264 | Journal (article/letter/editorial) | | porphyritic rhyolite dike (Quemont feeder dike; De Rosen Spence, 1976; Lichtblau and Dimroth, 1980). Lichtblau...constructed the Noranda volcanic complex and associated ore deposits. Ultimately, using the Joliet Breccia as...Superior Province (Fig. 1). Volcanic rocks of the district comprise the Noranda Subgroup (De Rosen Spence...into informal lithostratigraphic formations (De Rosen Spence, 1976; Gibson, 1990) and subsequently into...volcanic complex comprises the Noranda Subgroup (De Rosen Spence, 1976; Goodwin, 1980) of the Blake River |  | | Journal (article/letter/editorial) | | Sequenceat Noranda, Quebec C. D. SPENCE AND A. F. DE ROSEN-SPENCE Abstract Copper-zincmassivesulfideore depositsin...five successive periodsof rhyolitic activity. The ore deposits,which overlie chloritic pipes of alteration...and fourth rhyolitic zones, while only a massive pyrite body is known in the fifth zone. Depositsin the...with time, a feature also noted in most deposits. Ore depositsare restricted to a small part of the pile...1920,and it hassinceproducedover 90 million tons of ore. Good exposureof relatively W•TmN the Archean greenstonebelts |  | | Journal (article/letter/editorial) | | early 1960 that Edwards (1960) and 144,000 tons of ore in a massivesulfide lens and 44,000 tons in a zone...were syngenetic. early1964when,dueto the exhaustion ore, operations ceased. From a total of 385,000 Until...them. and new evidence,supportingthe hypothesis of ore formation as coeval with the volcanism, was dis-...finely bedded pyrite, main periodsof rhyolitic activity have been dis- whereas pyrite, pyrrhotite, and...whichis a major, steepeastwin, 1967;Spenceandde Rosen-Spence, 1975). As erly dippingdiorite (steep diorite) |  | | Book (volume) | | Ostrosi Romania by V. Ianovici and M. Borcos Bulgaria by B. Bogdanov Greece by G. Marinos Cyprus by...to gather information on the geology of European ore deposits knows the frustrations that such an endeavour... Zr, Mn, Al, Mg, REEs Non-metallic commodities Pyrite, sulphur, phosphates, borates, potash, salt, diamond...to gather information on the geology of European ore deposits knows the frustra- volume tions that such..._ Belgium; Southeast Europe includes Albania, Bulgaria, Cyprus, Greece, Hungary, Romania and Yugoslavia; |  | | Journal (article/letter/editorial) | | In addition, the chert nnit is the host of the ore deposit. The upperand lower contactsof the chert...showingits distribution and relationshipwith the ore depositandits attendant chlorite alterationpipe....Delbridgedepositbe accordinglychanged. (a) The "Mine" unit is not a nodular-bearing pyritic black shalebut...orebody is zoned,with a pyrite-sphalerite hangingwall, and a chalcopyrite(pyrite) footwall. j. •BOLDY 49...the Nor- has disregardedthe work of yearsby mine and field anda district of Quebec. geologists, in particularthat |  | | Journal (article/letter/editorial) | | Group of the Abitibi subprovince of the Superior province of Canada (Fig. 1) has been one of the most prolific...(Spence and de Rosen-Spence, 1975; de RosenSpence, 1976; Gibson, 1989). The bulk of the ore mined included... 1990), as well as the outlying Bouchard-Hébert mine in the Cléricy area (Riopel et al., 1995; Doucet...regime and mineralized showings (e.g., the Canagau mine and the Croxall Breccia, also known as the Interprovincial...o 76 00 ' Hudson Bay NEMISCAU ' Superior Province ONTARIO QUÉBEC o 51 00 Abitibi CAN A U.S |  | | Journal (article/letter/editorial) | | structural control on the mineralization: much of the ore is situated in quartz-carbonate shear and extension...most of the large, prolific veins at the McIntyre mine occur along flow contacts marked by carbonaceous...flow contacts, and Dunbar (1948) observed that the ore favors the upper part of the Tisdale group (now Tisdale...angular porcelainic fragments or shards. The McIntyre mine geologists (Griffis, 1962) divided the V10 into...into the V10a, b, c, and d, whereas at the Dome mine (Ferguson, 1968) they are loosely correlated with what |  | | Journal (article/letter/editorial) | | 424-444 Wall-Rock Alteration at the Millenbach Cu-Zn Mine, Noranda,Quebec GER^n•)R•wR• ^•) C. J^¾Ho•)Gso•...several Archcan volcanogenic Cu-Zn ore lenses at the Millenbach mine. The rocks and mineralization have...The mine mining the chemical differences among the alteration containsabout3 million tons of ore grading3...analyses in order to determinethe mineraIogicalreThe ore occurs in several discrete bodies of massive actions...compilations done by Falconbridge Copper Limited make the mine ideal for an alteration study. The approach in this |  | | Journal (article/letter/editorial) | | Geochemistryof Hydrothermally Altered Rocks at the Horne Mine, Noranda, Quebec* W. H. MACLEAN Departmentof GeologicalSciences...duringthe mineralization event. Introduction THE Horne mine, ownedby NorandaMinesLtd., exploiteda volcanogenie...1976. During thistime it produced59 million tons of ore averaging2.2 percent Cu and 0.17 Troy oz Au per ton...distinctive Cu and Zn metal contents, massivesulfide ore, associationwith rhyolite host rocks, and wallrock... accessto the Horne mine records,remaining drill core (•5 cm/m), and Remnor mine workings was made available |  | | Journal (article/letter/editorial) | | chemical characteristicsof rocksof the Birch Lake mine, northern Manitoba, in 1975 Annual report:Univ...oscillatoryzoned plagioclase with chalcopyrite,molybdenite,and pyrite (up to 5% is in the range An•s to Anal. Quartz...theGobbos pros- lybdenite(up to 1%),andscheelite with pyrite(up pect. of the mineralizationis to 10%)andraregalena...percentchalcopyrite with subordinate molybdenite, pyrite, pyrrhotite,sphalerite,and scheelite. The veinsare...terrains. The domichalcopyrite, molybdenite,and pyrite,andlow-grade nantly marine environmentsenvisagedfor |  | | Journal (article/letter/editorial) | | geometry and spatial relationship between the two ore types are very complex to interpret, when it comes...April 2019 Accepted 8 May 2019 Introduction The ore minerals of the Mississippi Valley-type (MVT) deposit...carbonate rocks. The spatial occurrence of both ore types is not given by abrupt geological contacts...geometrically complex ore bodies. The recognition and quantification of the two different ore types in hand specimens...calculation of mineralogical weight compositions of Zn–Pb ore minerals in a block model of the Florida Canyon deposit |  | | Journal (article/letter/editorial) | | fieldfor the galenaPb fromoredeposits withinthe Mine sequence. The youngerPb-Pbagesandthe lackof collinearitywiththe...placesare mafic(e.g.,Matagami).They occurstrati- asthe "Mine sequence"(Gibsonet al., 1984).Within graphicallybelow...graphicallybelow,and in closelateralproximityto, the Mine sequencethe ore is limitedto a few stratithe orebodiesand...eachrepresentinga singletimesourcenecessary to drivethe ore-forminghydrother- stratigraphic interval(Fig.2b)...overlyingore callyrelatedto the hostvolcanicrocksof the ore de- deposits(Franklinet al., 1981). The geologicrelaposits |  | | Journal (article/letter/editorial) | | MassiveSulfideDepositand IntracauldronDepositsof the Mine Sequence,Noranda,Quebec DAVIDJ. KEPm Departmentof...associated with rhyolite and andesitcflows of the Mine sequenceand occur within the Norandacauldron,a volcanicsubsidence...inferredmarginof the subsidence structureandareseparatedfromthe Mine sequence by the HorneCreekfault.Traditionally,the...structuralpermeability.The three major sulfidedepositsat the Horne mine are muchlarger (20-150 Mt) and formedin a fault-bounded...andesitic,andbasalticflowsandminorpyroclastic rocks (de Rosen-Spence,1976; Dimroth et al., 1983, characteristic |  | | Journal (article/letter/editorial) | | chemical changes in the alteration zone at the Norbec mine, Noranda, Quebec N.A. Shriver* and W.H. MacLean...below massive sulphide Zn-Cu ores at the Norbec mine in northwestern Quebec was outlined from drill core...was + 5.8 x 10 6 tonnes; inclusion of the massive ore lens yields a flux of + 9.6 • 10 6 tonnes for the...springs to form conformable lenses of massive sulphide ore (Franklin et al. 1981; Lydon 1984, 1988). The alteration...chemical components (the chemical flux) during the ore forming process been measured. It is now possible |  | McNicoll, V., Goutier, J., Dube, B., Mercier-Langevin, P., Ross, P.-S., Dion, C., Monecke, T., Legault, M., Percival, J., Gibson, H. (2014) U-Pb Geochronology of the Blake River Group, Abitibi Greenstone Belt, Quebec, and Implications for Base Metal Exploration,. Economic Geology, 109 (1) 27-59 doi:10.2113/econgeo.109.1.27 | Journal (article/letter/editorial) | | already formed when the Cu-Zn deposits of the Noranda mine sequence, including Millenbach and Amulet, were...portion of the Abitibi greenstone belt (Spence and de Rosen-Spence, 1975; Dimroth et al., 1982; Goodwin, 1982;...proportion of synvolcanic intrusions (Spence and de Rosen-Spence, 1975; Gibson and Watkinson, 1990; Gibson...has been referred to as the Noranda cauldron (de Rosen-Spence, 1976; Dimroth et al., 1982; Gibson and Watkinson...Group were among the first within the Superior province to be dated using U-Pb analytical techniques (Krogh |  | Moore, L.N., Daigneault, R., Genna, D., Hollings, P., Mueller, W.U. (2014) Exogenous and endogenous construction of the subaqueous Glenwood felsic lava flow complex; Abitibi greenstone belt, Québec, Canada. Precambrian Research, 251. 118-140 doi:10.1016/j.precamres.2014.06.013 | Journal (article/letter/editorial) | | felsic eruptive events such as individual flows (de Rosen-Spence et al., 1980; Kano et al., 1991), domes (Akay...volcanogenic massive sulfide deposit at the Horne Mine has warranted previous study (Wilson, 1941; Tassé...context of the host mafic shield complex and the Horne Mine sequence to the north. In the first segment of this... and dominantly tholeiitic Noranda caldera (de Rosen-Spence, 1976; Laflèche et al., 1992; Pearson and...the Abitibi greenstone belt contained within the province of Québec, Canada (modified from Daigneault et |  | | Journal (article/letter/editorial) | | belowthe lenses. Passingstratigraphicallyupward the pyrite-pyrrhotite ratio generallyincreases,magnetitecontentdecreases...appreciablepyrrhotiteand magnetiteand are poorly zoned. All three ore types (Archean,kuroko,Cyprus) overliepipesof hydrothermalalteration...volcanicpile and are termed proximal ores. Banded sulfide ore lenses and metalliferous sedimentsthat are not underlain...magnetite)assemblages in the stringerand lower massive ore zonesbelowthe sea-water-rockinterface,whereaspyrite-sphalerite...submarineventmovealongthe seafloorand depositsilicaand pyrite to form the laminatedcherty tuffs which are commonlyassociated |  | | Journal (article/letter/editorial) | | a Clay-Chlorite Precursor: Evidencefrom the Geco Mine, Manitouwadge,Ontario R. L. STANTON Del•artmentof...Africa, hasbeen observedin drill core from the Geco mine, Manitouwadge,Ontario. Detailed electronmicroprobeanalysisshowsthe...chlorite known since1964 as a commoncomponentof Kuroko ore environments. Contraryto the assumption by the earlier...accompaniment and result of the ore-formingprocessand is localizedin the ore environment.With the onsetand...alsolocalizedin the ore environmentas observedat Norandaand many other exhalative ore localities. Henceit |  | | Book | | Encyclopædia Britannica, Inc.) in association with Rosen Educational Services, LLC 29 East 21st Street, New...All rights reserved. Rosen Educational Services materials copyright © 2012 Rosen Educational Services...All rights reserved. Distributed exclusively by Rosen Educational Services. For a listing of additional...Rafferty: Associate Editor, Earth and Life Sciences Rosen Educational Services Nicholas Croce: Editor Nelson...association with Britannica Educational Publishing, Rosen Educational Services.” Includes bibliographical |  | | Journal (article/letter/editorial) | | at the eastern end of the Mount Windsor sub- province(Fig. 1). The basalpartof theTrooperCreek Stratigraphy...deposit.Acid volcanicsgenerally show more conti- of pyrite. It overprintssomeof the units of the unnuity betweendrill...andpyrite. Biotite, garnet,andser- metamorphic texture. Pyrite, quartz, andalusite, icite are probablymetamorphic...muscovite, chlorite, and cordieritc are the major pyrite are hydrothermalin origin.The faciesencom- minerals...nontronite as a commoninterstitial product. Sericite pyrite schistoccursclosestto the massivesulfides, and |  | | Journal (article/letter/editorial) | | Ore Geology Reviews 35 (2009) 4–46 Contents lists available at ScienceDirect Ore Geology Reviews j...calderas are first order sites for VMS. The Hunter Mine and Normetal calderas, as well as the Blake River...studies and detailed facies mapping, the Hunter Mine caldera is of the segmented, piecemeal variety,...and Burg, 1993; Sawyer and W.U. Mueller et al. / Ore Geology Reviews 35 (2009) 4–46 5 Fig. 1. A) General...Misema–New Senator–Noranda complex, and the Hunter Mine, the Normetal, Gemini, and Selbaie calderas. Note |  | | Journal (article/letter/editorial) | | ]Complex • r•ol•e • ........... MOaRUN , FIG. 1. Mine geologyof the Mobrundeposit,modifiedafter Caumartinand...volcanic rocks of the Archcan Blake River Group (de Rosen-Spence, 1976). The Blake River Group is the upp...stratigraphicsuccession (cycleV of Spenceand de Rosen-Spence,1975), and about 7 km to the northwestof...kilometers of these structures. The Mine Geology The Mobrun mine is located 30 km northeast of lower...Description Mineral Inventories and Ore Reserves of the Mobrun Mine Source Metric tons Cu (%) Zn (%) |  | | Journal (article/letter/editorial) | | concentrates that has been developed for remote mine sites without smelting capacity [15]. In some countries...group of microorganisms capable of enhancing Cu ore leaching with high As content, but few studies have...leaching, because this avoids sophisticated and costly ore crushing and designed heaps, since ores are staked...easy separation of enargite from the rest of the ore, resulting in high As–Cu concentrates [30,31]. Mining...been successfully implemented in Canada, Chile, Bulgaria, and other countries, achieving Cu dissolution |
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