Lakehead University Geology - Journal Yearbook (Thunder Bay, Ontario Canada)

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Roy J. Shegelskl, H.B.Sc., M.S., Ph,D. (pendin g) Academic Background; University of Toronto 1973-77 Ph.D. pending Lecturer at Lakehead University since 1976 This summer was spent investigating mafic volcanic terrains in the Northwest Territories. The particular areas of study were the Nowyak Lake area and the Griffin Lake area which are within 60 km of each other and located in NTS sector 65G. The areas are located within the Churchill Pro- vince and are Archean in age. The predominant lithologies of the areas include pillowed and massive basalts with subordinate amounts of ultramafic flows ( some showing splnifex textures), banded and laminated oxide facies iron formations, chertz sulphide facies iron formations and minor felsic pyroclastic and volcanoclastic tuffs and sediments. These areas were being investigated for massive sulphide potential. Results of the follow up to geophysical airborne and ground surveys in one of the areas led to the de- lineation of several favourable zones of nickel sulphide mineralization, in fact results are so encouraging that I cannot talk of them I The summer was relatively wet; the black flies were bad but the crews were great and included two able assistants from L.U.; R. Hall and B. Schneiders . 1

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Dr. Stephen A. Klssin, B.Sc., M.S., Ph.D. Academic Background; Post Doctoral Fellow, McMaster University 1973 N.R.C. Post Doctoral Fellow, CANMET, Department of Energy, Mines and Resources, Ottawa 1974-75 Assistant Professor, Department of Geology, Lakehead University since 1975. My activities last summer began with the GACMACGEGCGU (basically. Geological Association of Canada Mlneraloglcal Association of Canada) meeting in Vancouver in late April. As well as presenting a paper on the new mineral cernyite, Cu CdSnS , I attended a field trip to the southeastern B.C. lead-zinc deposits. My particular aim was to collect specimens from the Sullivan Mine, with the view of examining the tin mineralogy and pyrrhotite-sphalerite geobarometry. On my return to Thunder Bay, I was involved with the 23rd Annual Meeting of the Institute of Lake Superior Geology, hosted by the Department, in the capacity of Technical Sessions Co-Chairman. I also attended the Mattabi field trip as a supernumary. For the remainder of May, I worked on the preparation of journal papers and some geological field problems in the Rabbit Mountain Mine area. My efforts were interrupted by the birth of my daughter, my second child, on May 31st. After two weeks at home, I returned to the University to work on another journal paper on stannite and other tin-bearing sulphide minerals. Continued study on tin-bearing sulphide minerals led me to the appreciation that two previously undiscovered species exist. One is the cubic form of stannite, normally tetragonal Cu 2 FeSnS , while the other is the iron analogue of kesterite, Cu 2 ZnSnS , which is also tetragonal, but has a space group which differs from that of stannite. In the latter part of August, I spent some time in the field mainly in the reconnaissance study of silver mines in the Rabbit Mountain area. As well, I made a trip to Ottawa to use the facilities at CANMET in order to investigate the two new minerals mentioned earlier and continue some aspects of research on the synthetic system Cu 2 FeSnS -Cu 2 ZnSnS 4 . After all this, I found that the summer was suddenly gone. F 1

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1 Howard Poulsen. B.Sc. (Physics), B.Sc. (Geology ' ) Background; Exploration Geophysics 1961-71 High School Teacher 1968-69 Research Assistant (for J.M, Franklin) 1972-75 Laboratory Demonstrator at Lakehead University since 1975 In addition to the ongoing analytical work of the Geochemistry Lab, the past summer provided for me three geological highlights; the annual meeting of the Institute on Lake Superior Geology in May; the visit of three foreign students at our Department; and a major retrieval of soft sediment cores from Lake Superior. My contribution to the LSI meeting centered around a 2-day post- conference field trip to the Mattabl and NBU massive sulphide deposits. The trip, which entertained 46 geologists from all parts of North America, stressed the geological setting and genesis of the deposits based on the research of James Franklin of the Geological Survey of Canada. Jim and I spent a good deal of time organizing the trip in conjunction with the mine geologists as well as preparing a trip guidebook which summarized much of our research work at Sturgeon Lake carried out in the interval 1972-75. The summer saw the arrival of three graduate students from Geologisch- Paleontologisches Institut, University of Hamburg, West Germany. Frank, Rudi and Claus had come to Thunder Bay to study iron formations as part of their graduate thesis requirements at Hamburg and informally allied themselves with our Department for the summer. Their stay here provided many interesting insights into geological education in Germany in com- parison with the type of programme offered by our own University. Of particular interest was their reason for coming to Canada for field work; they had the sinking feeling that possible hundreds of geologists had already worked on most of the exposures in Germany. Our own fourth year students can take heart from this, considering the novel field aspect of most of their bachelor ' s theses. One particularly fine sunny day found me aboard a barge in the middle of Thunder Bay harbour as part of a crew Involved in the retrieval of four 50 foot piston cores of lake bottom sediment. The project was headed by Dr. Mothersill who is using the materials collected to study various aspects of the evolution of Lake Superior during the past 12,000 years. Although this project was of short duration ( one day ), it was most enjoyable and I didn ' t even get sea sick. 1 v '