Transactions . te individuals or to disposal by the UnitedStates under existing laws. The two methods here outlined have not in the past been freciuentlyresorted to as a means of quieting uncertain placer titles, due, no doubt,to the risks apprehended as incident to the relinquishment of title. Theproceedings are not recommended as being free from all possible danger,but such risks as there are, are of much less moment than the evils attend-ing the uncertain title to land patented as placer and within which thereare veins likely to give rise to a claim that they were in fact known at thedate o
Transactions . te individuals or to disposal by the UnitedStates under existing laws. The two methods here outlined have not in the past been freciuentlyresorted to as a means of quieting uncertain placer titles, due, no doubt,to the risks apprehended as incident to the relinquishment of title. Theproceedings are not recommended as being free from all possible danger,but such risks as there are, are of much less moment than the evils attend-ing the uncertain title to land patented as placer and within which thereare veins likely to give rise to a claim that they were in fact known at thedate of the placer application. 464 MINING METHODS IN ALASKA Mining Methods of Alaska Gastineau Mining Co. BY G. T. JACKSON,* JUNEAU, ALASKA(Chicago Meeting, September, 1919) The Alaska Gastineau Mining mine is located at Perseverance,about 4 mi. east of Juneau, Alaska. Its property consists of a group ofclaims, the lode system traversing these claims for a distance of 11,000ft. (3352 m.). It is shown in Fig. Fig. 1.—Alaska Gastineau Mining property near Juneau. The ore deposits occur in what is known as the Juneau gold belt. Thisgold belt can be traced for about 50 mi. northwest of Juneau and 40 It consists of a single band, several hundred feet wide, inwhich stringers and veins of quartz, carrying gold, occur in a slateformation near its contact with some altered volcanic rock known asgreenstone. The Perseverance orebody consists of stringer lodes, having a strikenorthwest and southeast, dipping about 60° to the northeast. These Manager, Alaska Gastineau Mining Co. G. T. JACKSON 465 orcbodies occupy a zone ol shcuiing in the .slate near its contact with foot wall. This shearing and fracturing is very marked inthe slate, and to a less extent in the schist, and metagabbro dykes, whichintrude the slate. The quartz veins and stringers are more numerousnear the foot wall, and become smaller and more scattered in the hardblack slate hanging
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
