...Meredith A. Kelly; Timothy G. Fisher; Thomas V. Lowell; Peter J. Barnett; Roseanne Schwartz Abstract The Nipigon channels, located to the west and northwest of Lake Nipigon, Ontario, are thought to have enabled the eastward drainage of meltwater from glacial Lake Agassiz during the last...

.... 1907 . Iron ranges east of Lake Nipigon . Ontario Bureau of Mines , 16th Annual Report, Vol. XVI, part I, pp.  105 – 135 . Cogulu E.H. 1990 . Mineralogical and petrological studies of the Crystal Lake intrusion, Thunder Bay, Ontario . Geological Survey of Canada , Open File 2277, 15 p...

... (SCLM) or continental crust in the generation of CFB is the subject of ongoing debate (e.g., Hergt et al. 1989 ; Gibson et al. 1996 , 2000 ; Ernst and Buchan 2003 ). This study focuses on radiogenic isotope characteristics of intrusive sills of the Nipigon Embayment, northern Ontario, which...

... apparent normal polarity, interpreted largely from new aeromagnetic data ( Ontario Geological Survey 2004 ), compared with the reversely polarized Nipigon sills. However, Middleton et al. (2004) cautioned that many “A” components of the magnetic remanence in some Nipigon Embayment sills may scatter far...

...Michael J. Zieg Abstract Petrographic and geochemical profiles collected through a ~250-m-thick Nipigon diabase sill near Black Sturgeon Lake, Ontario, constrain the complex emplacement and differentiation processes that controlled the magmatic evolution of these rocks: several nested reinjections...

... Nipigon, from which a subset was selected for this paper. A detailed sampling program was undertaken by staff of Lakehead University in the summers of 2003 and 2004; materials included existing diamond-drill core, available through the Ontario Geological Survey (OGS) core library located in Conmee...

...Phillip Larson; Howard Mooers Abstract The heavy clinopyroxene mineral pigeonite forms a glacial indicator dispersal train originating from diabase intrusions in the Nipigon region of northwestern Ontario. Analysis and interpretation of the pigeonite dispersal pattern adjacent to the up-ice portion...

... swarms, and alkaline complexes, especially in the Ontario portion of the rift. We report new high-precision U–Pb ages for 29 samples, primarily collected in the Lake Nipigon area, Ontario. From these new age results, it is now possible to expand the known distribution of Geon 15 magmatism in the region...

.... Regional bedrock geology map ( Ontario Geological Survey 2003 ). Much attention has focused on the PGE potential of the ultramafic intrusions in the study area. In Archean rocks adjacent to the Nipigon Embayment, extensive exploration by Boston Bay Mines – Madeleine Mines Ltd (now North American...

... 2006 Barnett (2006) poses a number of questions regarding some of the field observations and assumptions we used in our interpretation of a heavy-mineral dispersal train derived from an isolated eastern outlier of diabase of the Nipigon sills in northwestern Ontario ( Larson and Mooers 2005 b...

... , Open File Report 6021, 82 p. Barnett P.J. Dyer R.D. 2005 . PGE Surficial geochemistry case study project, Lake Nipigon region geoscience initiative . Ontario Geological survey , Open File Report 6167, 144 p. Gerrard A.J. 1988 . Rocks and landforms ; Uwin Hyman Ltd...

...S. C. Zoltai Abstract The surficial deposits, ice movements, and glacial lakes are described within an area of 25 000 square miles in northwestern Ontario. Field studies and subsequent interpretation of aerial photographs suggest the existence of two major and one minor ice mass during late...

...Everend Lester Bruce Abstract Gold is being mined at several places along a belt lying 50 miles north of Lake Superior, extending east from Lake Nipigon to Long Lake. The structural relations of the ore bodies at the following mines are briefly discussed--Northern Empire, Leitch, Sand River...

...J. M. Franklin; W. H. McIlwaine; K. H. Poulsen; R. K. Wanless Abstract The Sibley Group is a Neohelikian (1339 ± 33 Ma, RbSr, 87 Rb = 1.42 × 10 −11 year −1 ) red bed sequence located in an elongate basin extending northward for 150 km from Nipigon, Ontario. The lowest unit, the Pass Lake Formation...

...Mike Easton; Pete Hollings; Wally Rayner Abstract The Lake Nipigon Region Geoscience Initiative (LNRGI) was a 3-year collaborative geoscience data acquisition and compilation project that focussed on Lake Nipigon in Ontario and involved partnerships between mineral industry, university...

..., and have higher ages for the higher temperature fractions. Essentially unaltered samples may also give inconsistent patterns. For the Keweenawan igneous activity along the northwest shore of Lake Superior near the Minnesota–Ontario border and a Logan sill near Lake Nipigon, the plateau ages suggest...

...P.M. DIMMELL; J.A. MORGAN Abstract The Aubry pegmatites are located on the Seymour Lake property, 15 km north of Lake Nipigon in northwestern Ontario. The property lies within the Caribou Lake-Marshall Lake greenstone belt along the English River-Wabigoon subprovince boundary of the Superior...

...Eion M. Cameron; Kéiko H. Hattori Abstract This paper describes part of a project to examine geochemical methods in exploration for Pd deposits in northwestern Ontario. Palladium is one of the platinum group elements (PGE) that is mobile in dilute surface waters as hydroxy complexes, a feature...