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

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Experience: Ontario Department of Mines - I 968 Ontario Department of Mines - 196-9 Projex Ltd. - 1970 AMPHIBOLES AND PYROXENES FROM THE SYENTITIC ROCKS OF COLDWELL ALKALINE COMPLEX, THUNDER BAY, ONTARIO M. C. Lee Amphiboles and pyroxenes are separated from the rock specimens which are syenites and nepheline syenites from the Coldwell Alakaline Complex. The amphiboles and pyroxenes are determined by both optical and x-ray powder methods. The 2V angles, extinction angles and refractive indexes (a, 3, y ) are determined for these specimens. The pyroxenes are found to be soda augite, aegirine-augite and augite. Zoning is observed; there is an enrichment in aegirine content towards the rim of the crystals. The amphiboles determined by the optical studies are proved to be ferrohastingsite, hastingsite, and also some riebeckite. Zoning is also observed; the iron content increases from the center towards the rim of the crystals. Optical determination is a much better method than that of x-ray for these minerals. X-ray determination is a failure for the pyroxenes and amphiboles. It is due to the fact that the cell parameters of diposide is very similar to those of aegirine and augite. The same factor affects the x-ray determination of amphiboles; the cell parameters of riebeckite is very similar to those of ferrohastingste and arfverdsonite . The course of crystallization of these pyroxenes seems to be:- soda augite - aegirine-augite - Aegirine. According to Aoki (1954) as well as Yaki (1966), crystallization in the mentioned trend takes place under low temperature and high oxygen partial pressure conditions. When the crystallization trend is moving towards the aegirine-rich members, the temperature is decreasing gradually and the oxygen partial pressure is increasing simultaneously . From the analytical results; the sequence; - Ferrohastingsite - Arfvedsonite is suspected to be continuous. Formerly, both riebeckite and arfredsonite are suspected to be the final end product. The presence of riebeckite in some rock specimens of Coldwell Complex has shown that riebeckite is the final end member of the series. 41

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GENERAL STRATIGRAPHY AND TRACE ELEMENT DISTRIBUTION OF THE SEDIMENTS OF BLACK BAY, LAKE SUPERIOR R. D. Middaugh During the late summer of 1970 a reconnaisance survey of the bottom sediments of Black Bay was carried out. The sampling was done from a Boston Whaler using a Phleger gravity corer and a Ponar grab sampler. Unfortunately, due to weather conditions only 32 stations were completed. Samples, on being brought to the laboratory underwent various analysis. Grain size analysis were done using sieve and pipette methods. The Ph and Eh were recorded at the top and at various depths along the length of the core. The cores were split and logged and samples were taken at various intervals of x-ray diffractometer analysis and for trace element analysis using the Atomic Absorption unit. The trace elements analysed for were Cu, Fe, Mn, Cr, and Ni. Results of the x-ray diffractometer analysis indicate that there are three units present. 1) Glacially derived clay, 2) post glacial intermediate clay, 3) upper recent sediments. These units are conformable in the deeper parts of the bay but exhibit erosional contacts near the more shallow margins. The geochemical data indicate that the trace element concentrations are independ- ent of grain size. The data would also seem to indicate that the trace element concentrations are fairly uniform and show no anomalous values either vertically or horizontally relative to the lithology of the sediments of Black Bay. EXPERIENCE : Summer 1968 - General mapping and core logging in the Papaskwasati Basin and the Otish Mountains in North Central Quebec. Spring 1969, 70, 71 - Limnological studies of Lake Superior under J. S. Mothersill and Canada Centre for Inland Waters. 40

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AilAA • MULTINATIONAL MINING COMPANY • FACING TOMORROWS CHALLENGES If youngfolkstoday are looking for CAREERS WITH A CHALLENGE — with social responsibility — - with service to their fellowmen — they need not look further (than the mining industry). The mining industry faces serious challenges in the coming decades in meeting its basic RESPONSIBILITIES and fulfilling itsOBLI- GATIONS to protect environmental values. The very foundation of the standards that all PEOPLE seek to achieve is based on a grow- ing and adequate supply of MINERALS. I K MacGregor Chairman and Chief Executive Officer American Metal Climax. Inc AMAX activities include the exploration, development, mining, smelting, refining and processing of nearly half the metals in the periodic tables. Group IA 1 1 A NIB IV.B VB VIB VlIB VIII IB IIB IMA IVA 1 H Hydrogen t 00797 3 ? Li 6 939 m 4 S Be Beryllium 9 0122 5 I B Boron 10 811 6 l C CaAon , 12 0i» ' 5 11 l Na ' Sodium 22 9898 12 I Mg 2 Magnesium 24 312 13 ; 14 I Si S.i.con 28 086 19 1 k ; R©»9 Viim 39 102 20 i Ca f Calcium ' 40 08 21 I Sc 1 Scandium 44 956 22 I Ti 47 90 ° 23 | ' VsMdrum 50 942 24 i Cr T Chromium 51 996 25 l Mn ' 1 Manganese 54 9380 26 1 F© It 65847 . 27 l Co 1 Coball 58 9332 - 3 8 l Ni T Nicker 5871 29 I Cu ' ? CoBoe- 83 54 30 I Zn S ■2-tc 65 37 31 f Ga ’5 69 ’2° 32 2 Ge ’• N? 59 3 37 I Rb S Rubidium 85 47 38 S Sr ' S 2 87 62 ' 39 l Y ’| 88 90S 40 l Zr is 2 Zwcorasm 9122 41 I Nb If Niobium 92 906 42 f Mo If MolyO 95 94 43 l Tc If Techne- 2 (991 44 | Ru If Ruth4ru ,m 48 i Rh If Rhodium 102 905 TeT Pd {? --RaMadmn. 1064 47 S Ag IS 107 870 AS 2 Cd |f Cadmium 2 11240 49 i In li! 1 1482 50 | Sn IS 4 T.rt M8 69 55 l cs is 8 Cesium l 132 905 56 l Ba !i 8 Barium 2 137 34 57-71 lanthanide Series- 72 1 Hf « 10 H»fr»urn 2 17849 73 l Ta Jf Tantalum 2 180 948 74 l W WoM.amo. 12 T.mgsier 2 183 85 75 f Re if 13 Rhenium 7 186 2 76 i ° S If Osmium 2 190 2 77 i ,r If - 15 Indium ? «•?. 78 I Pt IS ’« Platinum 2 195 09 . 79 s Au IS 18 GoM 1 -196 967 80 i Hg IS 18 Men wry 7 700 59 81 i TI IS . 04 J - 82 j. Pb IS 18 iwd 4 20719 07 I Fr ;s 18 F rnnclum 8 1223) 1 88 l Ra j; 18 Rntlium 8 1227) 2 89 l Ac IS 18 Actinium 9 (227) 2 90 I Th JS 19 Thorium 9 232038 2 91 I Pa JS Protac- 20 tinium 9 (231) 2 92 l U 21 Uranium 9 93 f Np 3 Neplun- 22 ium 9 (237) 2 94 f Pu II Pluton- 23 Ium 9 (242) 2 95 f Am Jf Amori- 24 cium 9 (243) 2 96 Cm IS 25 Curium 9 (245) 2 97 l Bk JS Berko- 26 hum 9 -(249) 2 98 i Cf IS Califor- 28 (249) 2 99 i Es IS Einstein- 29 ium 8 (254) 2 100 s Fm IS 30 (252) ' 2 AAAAK EXPLORATION, INC. A SUBSIDIARY OF AMERICAN METAL CLIMAX, INC. Canadian Offices in TORONTO, KIRKLAND LAKE, TIMMINS, WINNIPEG, KAMLOOPS, VANCOUVER 42