Annual report . liere appears to have been little prospecting around this intrusion. It would seemthat prftsjKcting in the vicinity of such intrusive rocks might result in the discoveryof economic deposits of gold. A til in sectfon of this syenite was examined under tlie microscope. It provedto 1)0 a quartz-syenite. Some of tlie quartz is in micrographic intergrowth with thefeldspar. The feldspar is badly decomposed and is cloudy. Epidote and chloriteare found, apparently as secondary minerals after some coloured constituent. Alittle biotite is present. Judging from the character of this thin
Annual report . liere appears to have been little prospecting around this intrusion. It would seemthat prftsjKcting in the vicinity of such intrusive rocks might result in the discoveryof economic deposits of gold. A til in sectfon of this syenite was examined under tlie microscope. It provedto 1)0 a quartz-syenite. Some of tlie quartz is in micrographic intergrowth with thefeldspar. The feldspar is badly decomposed and is cloudy. Epidote and chloriteare found, apparently as secondary minerals after some coloured constituent. Alittle biotite is present. Judging from the character of this thin section it may bethat part of the rock is a micropegmatite. Examples of lamprophyre. in dikes or snmll intrusions, were found on tlu>.south end o Wawagoshe lake, and at the east end of Mulven lake on the sections from tbosp two places were examined and found to bi> hornblende- 22 Department of Mines No. 4 LEGEND PRE-CAMBRIANAl^oman ? l+^f Ji Sye/7/te y\//t/7^tJ m/nor areas offe/dspor-porp/)yry. Katrine Township P///oi^ /aya Township M^GarryTownship Map showiiig area of syenite and feklspai-porphyrv and location of gold veinsin the southeast coiner of Katrine township, Ben Nevis area. 1920 Ben Nevis Gold Area 23 Jampropliyre. The specimen ironi Muheii lake contains some seeondarv himprophyres are somewhat simihir to the hunprophyre at the Aruonautgold mine, in Ciautliier townshi]). immediately north of Beaverhon*e and Avalakes. There are luimerous dikes oi quartz-porplivrv and feldspar-porpliyiy cuttiniithe Keewatin throughout the area. The location of some of these dikes is shownon the map. They aie also to be Algoman in age. Keweenawan Dikes of fresh diabase, ])robably of Keweenawan age. cut the Keewatin and alsotlie feldspar-porphyry dikes. These diabase dikes are probably tlie youngest roclcsin the area. One of them occurs on the second portage half a mile southeast ofKinabik lake, where it is found intersecting a feldspa
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
