Annual report . ter having spent most of histime in studying the gold deposits. A detailed description of the geology is given by W. in Memoir , above mentioned. 1920 West Shiningtree Gold Area 33 schistosity is along narrow east-west vertical zones, and it is in these zones thatsome of the gold veins occur. During the alteration the rocks have been changedto hornblende, chlorite and sericite schists, particularly when in close proximity tothe granite masses. The greenstone near the granite contact on the Burke claimat Granite lake has been changed to a hornblende-chlorite schist
Annual report . ter having spent most of histime in studying the gold deposits. A detailed description of the geology is given by W. in Memoir , above mentioned. 1920 West Shiningtree Gold Area 33 schistosity is along narrow east-west vertical zones, and it is in these zones thatsome of the gold veins occur. During the alteration the rocks have been changedto hornblende, chlorite and sericite schists, particularly when in close proximity tothe granite masses. The greenstone near the granite contact on the Burke claimat Granite lake has been changed to a hornblende-chlorite schist, but still retainsthe pillow structure. Owing to the resemblance of the ellipsoidal andesite andthe other Ijasic volcanics they have all been grouped together. There are, however,bands of rusty-weathering greenish carbonates, extending for three miles fromthe Gosselin property to Stewart lake, which could be differentiated in detailedmappini;. These rocks closely resemble in appearance those in Deloro Qiuiitz yeijilets in rusty carbonate on^laim No. 2325. Gold occurs insome of the stringers. at Larder lake, and Opasatika lake in Quebec. They are intersected by quartzstringers which sometimes carry visible gold and in many places are intruded bygranite porphyry. A sample of the massive green carbonate from the Clarkclaim. Xo. 2277, Asquith township, was found by W. K. McNeill, Provincial As-sayer, to be an impure magnesium-iron-lime-carbonate. The green colour isprobably due to ferrous oxide; a trace of nickel is also present. Other impuritiesare quartz and sericite. Portions of the agglomerate may represent the broken ropy surfaces of certainlava flows. Accompanying the pillow lavas in places are banded sugary quartzand pyrite of the Iron formation type, wliicli on analysis sometimes contain alittle srold. 34 Department of Mines No. 4 PilnjoUie, Traclnjte it/uj Jlomblcnde Andesife.—These rocks occur as irregularflow-like masses in variou- parts of the area, partic
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
