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Compilation of Cobalt-Temagami Area, Abitibi

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abcd 80°25'47″ 20' 10' 80°00'00″ 50' 40' 30' 79°20'20″ LEGEND THE ABITIBI SUBPROVINCE 05 545000 m 50 55 60 65 70 75 80 85 90 95 600000 m 10 15 620000 m 25 ; ! 47°29'46″ The Abitibi Subprovince is an 800 by 300 km Archean "granite-greenstone" BANKS Globe PHANEROZOIC : WAL LI S SPEIGHT Lake AULD / LUNDY DYMOND HARRIS 0 domain situated along the southern margin of the Superior Province. It is 17 / 16d HUDSON 17 / 47°30'00″ 17 16c dominated by supracrustal and granitoid rocks with a range of ages from 15c 17 CENOZOIC 2.75 to 2.67 Ga (Jackson and Fyon 1991). Historically, the Abitibi Ontario Geological Survey Pike 16d <2683.7 ± 0.9 Ma D greenstone belt was considered to be that portion of the Abitibi 17 17 18 10 Lake 20 (! 5260000 m 5260000 m QUATERNARY Subprovince extending to the western margin of the extensive granitoid Banks 5 8abc <2725 Ma complexes west of Timmins. New mapping and geochronological evidence Lake / D " (Heather et al. 1995) shows that the Swayze greenstone belt contains MAP P.3581 Big 5 20 * ) RECENT Bilsky 17 17 D* many of the structures and stratigraphic ages typical of the Abitibi belt in 17 16c 2 8abc / Lake, stream and wetland deposits Lake 16d 16d 20 D * the Timmins–Kirkland Lake area and is now interpreted to represent a Mowat 16c 20 15 17 16d deeper erosional level of a once-continuous Abitibi greenstone belt PRECAMBRIAN GEOLOGY Moccasin Landing 15 20 (!90 PLEISTOCENE extending to the Kapuskasing Structural Zone. Lake D 5 20 D ! , Klock TRETHEWEY * 16c 5 8 2 20 19 Glacial, glaciofluvial and glaciolacustrine deposits: sand, The Abitibi greenstone belt is one of the world's largest, best preserved Lake Lady 10 D gravel, clay, till LADY 17 2 and most economically productive greenstone belts in the world. GEOLOGICAL COMPILATION / Evelyn 16d 18a EVELYN-SMOOTHWATER 20 !44 / 17 River D D ( UNCONFORMITY The Cobalt–Temagami map sheet covers the area from the southern 2 OF THE COBALT– PROVINCIAL 17 16c 16c / (!8 Haileybury PARK 16d 20 ! boundary of Kirkland Lake south to the Grenville Front and from the Makobe BARR 5 5 17 / 08 Québec border west to approximately one township west of Lake 17 MESOZOIC Lake 8 / TEMAGAMI AREA, WHITSON / 16d 8abc 0 Temagami and Lady Evelyn Lake. Rocks are classified on the basis of BUCKE 20 20D * 16c FIRSTBROOK Moose 65 D 18a their dominant lithology using textures, structures and both approximate 55 VA N 55 JURASSIC / 17 / 15 Lake and specific compositions to refine the classification. Geological ABITIBI GREENSTONE BELT ; North KLOCK NOSTRAND / 16d information has been primarily compiled from previous mapping. New Cobalt 20 Kimberlite 10 16c 9 8ab ! 17 19 interpretations of the extent of lithologic units, specifically in the areas / 17 / 2 / 65 2 17 lacking outcrop, have greatly benefited from the use of the reprocessed 16d 15 ,/ 85 , 2a,b geophysical data for this area (Gupta 1995, 1996). As well, geochemical 17 / 16c 5 2a,11b / 5 data have allowed for the further subdivision of the metavolcanic rocks. Scale 1:100 000 Grays 17 , (!12 PALEOZOIC Taylor 5 16d 5 8 Lake /16d 2000 m 0 2 4 km Anvil Lake 16d Lake 2,618 Within the confines of this map lies the classical Cobalt silver mining 23 17 16c 2690.9 ± 1.3 Ma / INSET Map 16d 16d / SILURIAN camp with numerous past producers of silver, cobalt and associated 17 2a,3f 15 Sasaginaga 16d , //(!11 elements. Other past producers include base and precious metals, iron Lady 16d 3f 16c Lake (!10 16d 19 Sedimentary Rocks ore and industrial minerals such as limestone, dolostone and marble. At *# 17 Sydney 3f / 15c / / / 19a Thornloe Formation: dolostone, limestone, minor present only limestone is being commercially quarried. NTS Reference: 31 M/3,4,5,6,12; 31 L/11,12,13,14; 41 I/9,16; 41 P/1,8,9 Lake / / 17 / / / 80 / 2ab,3a,6 / sandstone / 15 5 16d 2ab 17 / 16d 5 19b Earlton Formation: limestone, dolostone, shale 16d / Lamprophyric 2ab,3f,6bd/ / 17 16c / 17 / / 19c Wabi Group (unsubdivided): dolostone, shale 16d 5 dike / /////2687.4 ± 1.7 Ma 50 © Queen's Printer for Ontario, 2006. 50 / /*# / 5 Lady Evelyn Lake / Gillies / / / ORDOVICIAN 2ab 81° 80° / 83° 82° 2 17 Lake 16d This map is published with the permission of the Director, Ontario 8 10 2ab //// / 3a / Cochrane 16c 16d // / Lake 49° Geological Survey. / 2ab 16c 18 Sedimentary Rocks Québec 16d / // 2ab / / / /2ab / / / / / 16c 18a Liskeard Group (unsubdivided): limestone, shale Lake Abitibi 2 17 ; / Timiskaming 5 17 / / 3a Timmins Sheet 1998 Sheet 1999 5 2ab KNIGHT BRYCE ARMSTRONG BRETHOUR 16c 17 10 / 85 (Map P.3379 HAULTAIN CHOWN MICKLE JAMES TUDHOPE / / 3a / (Map P.3398 VAN HISE 80° Thornloe 79° HEN- INTRUSIVE CONTACT 8 / CASEY / HARLEY / / and MRD 36) 81° ROAD- KERNS ; BARBER CANE WOOD Bay Lake 17 / and MRD 46) WILLET Tupper 16c / 16d 17 TYRRELL MILNER NICOL LAWSON HOUSE Hobart 8 16d / Timmins DYMOND HARRIS 10 / 10 HUDSON New Liskeard / 12b LUNDY / AULD / SPEIGHT Lake Lake 16c / 12b BANKS / / LEITH CORKILL WALLIS COLEMAN / LEONARD / / / / 10 PRECAMBRIAN CHARTERS FIRSTBROOK 16c / VAN Haileybury 15c 2ab Kirkland Lake TRETHEWEY KLOCK BARR BUCKE / 2 / NORTH NOSTRAND 17 /2a /17 RAY BREWSTER Angler 16c / / / WILLIAMS WHITSON 16c 25 DONOVAN LEO / 2ab COLEMAN Cobalt 16c ; / / 12 / Kirkland Lake KITTSON Lake / LEO 16c / 6 // PROTEROZOIC Matachewan MCGIFFIN RORKE RORKE / / 15 48° DUFFERIN LECKIE CORLEY GAMBLE DANE 16d 16c 2af,6 Swayze Sheet 2002 Sheet 2001 Latchford ; 5 / / Sheet 2003 DANE Giroux 17 LORRAIN / / / (Map P.3511 COLE BRIGSTOCKE GILLIES LIMIT Québec 16c SLADEN MEDINA MCGIFFIN / (Map P.3425 ELLIS PARKER SELBY / / (Map P.3527 MCLEOD 16d 17 Lake 10 12b and MRD 93) STULL 16c 2 / 12 NIPISSING and MRD 58) KITTSON and MRD 94) CANTON 17 / / ACADIA ASTON BANTING 16c 15c / / 16c HAENT- SOUTH 16c 16d / VALIN SELKIRK 5 16d 17 SHELBURNE LORRAIN 17 17 / / 17 / New /10/ 12b SCHEL DUNDEE 45 / / / / / 45 17 LE CHAMBERS CASSELS / 8 Mafic Intrusive Rocks: diabase, granophyre Goodfish 15 TURNER SEAGRAM DELHI ROCHE STRATHY 16c Kitt / Lake 16c Cobalt COTTON HOWEY MARCONI CYNTHIA Lake 16d 2 2ab / STRATHCONA ELDRIDGE / HEBERT 16c M STOBIE BRIGGS RIDDELL 47° 16c Lake 16c 10 BERESFORD ARMAGH BELFAST JOAN o / GRIGG DEMOREST CLARY / n 2a / / Cobalt– 5 t HARTLE BURNABY Bay 17 r / SHEPPARD YATES LAW ASKIN 16c e / 16d Temagami TELFER SCHOLES PHYLLIS / 16c al HURONIAN SUPERGROUP CREELMAN AFTON 5 Lake R / 12 Sheet 2006 FRALECK MCCONNELL 16d MACBETH FLETT ANGUS 17 16d i / 15 20' MACKELCAN VOGT OLIVE MILNE PARKMAN ve / 16d (Map P.3581) CLEMENT 47° HUTTON PARKIN AYLMER TORRINGTON r MCCARTHY 16 Sedimentary Rocks LA SALLE 8 OBABIKA RIVER WYSE Latchford / 16c KENNY ; 17 HOBBS MCCALLUM SISK MCAUSLAN ! 10 17 12 79° NORMAN RATHBUN KELLY MCNISH PARDO GOODERHAM PROVINCIAL 10 WISNER CLARKSON MCLAREN HAMMELL GARROW 16d 16d 12b DANA 5 DAVIS JANES THISTLE OSBORNE POITRAS PARK Sugar 2ab /2ab,6 HANMER Capreol SCADDING GLADMAN 20' Sucker 16d e CAPREOL MCWILLIAMS 17 / 16a Bar River Formation Valley MACLENNAN STEWART JOCKO EDDY Lake East LYMAN Gut Lake e Location of 1:100 000 scale map sheets and corresponiding digital data STREET GIBBONS BASTEDO FELL LOCKHART 16b Gordon Lake Formation LOUGHRIN HENRY NOTMAN / / BLEZARD FALCONBRIDGE CRERAR 4 GARSON FRENCH BUTLER 15 releases (Miscellaneous Release—Data) cited in "REFERENCES". MULOCK ANTOINE 80 GRANT BLYTH / 16c Lorrain Formation AWREY HAGAR RATTER HUGEL FIELD MERRICK 16d SNIDER MCKIM NEELON DRYDEN CHARLTON 10 2ab 12 BADGEROW PHELPS OLRIG Lady 16c / 10 ; 16d Gowganda Formation Location Map 1 cm equals 20 km Evelyn 16c 2 16c Lake 10 17 16c 2 17 / 16c Hound 40 5 Gullrock / / 17 40 16f Mississagi Formation 17 Chute 2a ; 3af 17 Lake 16c Lake 12b 10 ABBREVIATIONS 15 16c This geological compilation of the Cobalt–Temagami area is the sixth of a 16c 17 17 2ab 15 Diabase Dikes 16c 5 16d 16d 17 10 2a Ag .......................................silver Mo...........................molybdenum series of 1:100 000 maps and GIS data sets of the Abitibi Subprovince in ; Isbister 15 15a Matachewan (2452 Ma) (NW) 5 Au.........................................gold Ni .......................................nickel Ontario being compiled over the next few years. 8 16c 10 16d /3af 15b Biscotasing (2167 Ma) (ENE) 17 Lake 15c 12b Bi ....................................bismuth Pb.........................................lead 16d 2 15c Sudbury (1238 Ma) (WNW) 16d 16d 12 17 LORRAIN 12b Cd.................................cadmium Pd ................................palladium LADY 15 ; ; 15 / 16d 15d Abitibi (1140 Ma) (ENE) SOURCES OF INFORMATION EVELYN-SMOOTHWATER 16d 16d 16c 16d Co......................................cobalt S......................................sulphur 5 Turner 5 Cu.....................................copper Sb.................................antimony PROVINCIAL 17 2 GILLIES LIMIT 16c 8 Lake 17 16c INTRUSIVE CONTACT Fe..........................................iron U.....................................uranium This geological map of the Cobalt–Temagami area was compiled from SELBY PARK Eagle 16c 16d 2 16c published maps and reports of the Ontario Geological Survey and the / 16d ; 5 Zn..........................................zinc 17 Willow MEDINA Lake 17 17 Geological Survey of Canada. In addition, information from unpublished 16c Island 5 16d 10 COLE BRIGSTOCKE ARCHEAN reports and maps on file with the Ontario Geological Survey, university SLADEN Lake 2 12/ 16d / 12b 3 8 theses, papers in professional journals, geophysical maps and satellite 17 2 20 2ab 10 2 17 17 16d 16d D * 12b 3 NEOARCHEAN images were incorporated.
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    Ontario Geological Survey Open File Report 6101 Toward a New Metamorphic Framework for Gold Exploration in the Timmins Area, Central Abitibi Greenstone Belt 2002 ONTARIO GEOLOGICAL SURVEY Open File Report 6101 Toward a New Metamorphic Framework for Gold Exploration in the Timmins Area, Central Abitibi Greenstone Belt by P.H. Thompson 2002 Parts of this publication may be quoted if credit is given. It is recommended that reference to this publication be made in the following form: Thompson, P.H. 2002. Toward a new metamorphic framework for gold exploration in the Timmins area, central Abitibi greenstone belt; Ontario Geological Survey, Open File Report 6101, 51p. e Queen’s Printer for Ontario, 2002 e Queen’s Printer for Ontario, 2002. Open File Reports of the Ontario Geological Survey are available for viewing at the Mines Library in Sudbury, at the Mines and Minerals Information Centre in Toronto, and at the regional Mines and Minerals office whose district includes the area covered by the report (see below). Copies can be purchased at Publication Sales and the office whose district includes the area covered by the report. Al- though a particular report may not be in stock at locations other than the Publication Sales office in Sudbury, they can generally be obtained within 3 working days. All telephone, fax, mail and e-mail orders should be directed to the Publica- tion Sales office in Sudbury. Use of VISA or MasterCard ensures the fastest possible service. Cheques or money orders should be made payable to the Minister of Finance. Mines and Minerals Information Centre (MMIC) Tel: (416) 314-3800 Macdonald Block, Room M2-17 1-800-665-4480(toll free inside Ontario) 900 Bay St.
  • Geological Mapping, Structural Setting and Petrographic Description of the Archean Volcanic Rocks of Mnanka Area, North Mara

    Geological Mapping, Structural Setting and Petrographic Description of the Archean Volcanic Rocks of Mnanka Area, North Mara

    PROCEEDINGS, 43rd Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 12-14, 2018 SGP-TR-213 Geological Mapping, Structural Setting and Petrographic Description of the Archean Volcanic Rocks of Mnanka Area, North Mara Ezra Kavana Acacia Mining PLc, North Mara Gold Mine, Department of Geology, P. O. Box 75864, Dar es Salaam, Tanzania Email: [email protected] Keywords: Musoma Mara Greenstone Belt, Mnanka volcanics, Archaean rocks and lithology ABSTRACT The Mnanka area is situated within the Musoma Mara Greenstone Belt, the area is near to Nyabigena, Gokona and Nyabirama gold mines. Mnanka area comprises of the sequence of predominant rhyolitic volcanic rocks, chert and metasediments. Gold mineralizations in Mnanka area is structure controlled and occur mainly as hydrothermal disseminated intrusion related deposits. Hence the predominant observed structures are joints and flow banding. Measurements from flow banding plotted on stereonets using win-TENSOR software has provided an estimate for the general strike of the area lying 070° to 100° dipping at an average range angle of 70° to 85° while data from joints plotted on stereonets suggest multiple deformation events one of which conforms to the East Africa Rift System (striking WSW-ENE, NNE-SSW and N-S). 1. INTRODUCTION This paper focuses on performing a systematic geological mapping and description of structures and rocks of the Mnanka area. The Mnanka area is located in the Mara region, Tarime district within the Musoma Mara Greenstone Belt. The gold at Mnanka is host ed by volcanic rocks that belong to the Musoma Mara Greenstone Belt (Figure 1). The Mnanka volcanics are found within the Kemambo group that comprises of the sequence of predominant rhyolitic volcanic rocks, chert and metasediments south of the Nyarwana fault.
  • Chapter 1 – Introduction – Review of Rocks and Plate Tectonics Practice Exam and Study Guide

    Chapter 1 – Introduction – Review of Rocks and Plate Tectonics Practice Exam and Study Guide

    Chapter 1 – Introduction – Review of Rocks and Plate Tectonics Practice Exam and Study Guide To be able to understand the material covered during this course you need to have a basic background in the kinds of rocks making up our planet. This section of the study guide is aimed at helping you gain that background. 1. What are the three major groups of rocks found on planet Earth? Igneous Rocks 2. Which of the following processes is associated with igneous rocks? a. Solid‐state recrystallization b. Weathering and erosion c. Transportation and deposition d. Cooling a silicate liquid to a solid rock e. The accumulation of granitic debris in a moraine 3. If a silicate liquid flows out along the Earth’s surface or seabed, then it is called _______________. 4. If a silicate liquid exists beneath the Earth’s surface or seabed, then it is called _______________. 5. Which of the following terms refer to a body of magma or its solidified equivalent? a. Basalt b. Sandstone c. Gneiss d. Pluton e. Schist 6. If you can see the crystals making up an igneous rock with the naked eye, then the texture is described as a. Pyroclastic b. Phaneritic c. Aphanitic d. Porphyritic e. Aphyric from Perilous Earth: Understanding Processes Behind Natural Disasters, ver. 1.0, June, 2009 by G.H. Girty, Department of Geological Sciences, San Diego State University Page 1 7. In an aphanitic igneous rock can you make out the outlines of individual crystals with the naked eye? Yes or No 8. What type of igneous rock is the most volumetrically important on our planet? Intrusive Igneous Rocks 9.