2012, ISBN: 9781130749748

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustra… More...

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...is largely conglomerate and greenstone tuff, underlain by granodiorite, which is exposed down the hillside to the southwest. The area is densely covered by undergrowth, which renders prospecting difficult. The dip needle has been successfully used within this area, and the deposit just described was located by it. CHARLES PROSPECT. The Charles property is about 1 mile southeast of the Mammoth group and 5,000 feet from tidewater, at an elevation of 380 feet. It was located in May, 1907, and only a small amount of work has been done on it. The mineral body exposed in a cut 20 feet long and 10 feet deep consists of chalcopyrite masses associated with some magnetite in a garnet gangue which replaces the greenstone tuff country rock. Diorite occupies the hill just west of this prospect, but was not exposed near the mineral body. Dikes of diabase crosscut the ore body and are evidently of later origin. Besides the copper, the ore is said to carry high values in both gold and silver. VENUS GROUP. The Venus group of claims is on Iron Creek 1J miles from the head of Kajsaan Bay and about 1 mile south of the Rush & Brown mine. This property was located in 1904 and a magnetic survey made. Within the area of maximum attraction a pit was sunk and a trench 50 feet in length was made through the overlying debris, exposing the magnetic deposit. Below these surface excavations, which are at an elevation of 250 feet, a tunnel 75 feet in length has been driven which crosscuts 50 feet of debris and 25 feet of country rock, and at its face exposes ore. The country rock is an indurated greenstone tuff with interstratified quartzite beds, the ore occupying a shear zone. Associated with the ore are considerable sphalerite and pyrrhotite, with quartz and calcite as gangue miner... Weight:0.49 lbs, RareBooksClub.com, 3/6/2012 0:00:00<