Excerpt from The Juneau Gold Belt, Alaska, And, a Reconnaissance of Admiralty Island, Alaska Systematic investigation of the mineral resources of Alaska by the United States Geolog ical Survey began in 1898. Much of the region being practically unknown, explorations and general reconnaissances had first to be made, and it was not until 1902 that the demand for general information concerning different portions of the Territory was sufficiently satisfied to permit making plans for detailed investigations similar to those in progress in the States. In the summer of 1902 Mr. W. J. Peters was detailed to make a topographic map of the vicinity of Juneau, and in 1w3 Mr. Arthur C. Spencer, assisted by Mr. Charles W. Wright, took up the study of the geologic formations and the ore deposits of the region. In addition to the investigation of the area covered by the detailed map, a geologic reconnaissance was made of the accessible portions of the mainland from Port Houghton northward to the head of Chilkat River, and all the important mining camps of the belt were visited. Unpublished topographic maps prepared by the Canadian Boundary Commission were available and facilitated the plotting of the general distribution of the rocks throughout the belt traversed. The present report upon the work of this field season is accompanied by topographic and geologic maps of the vicinity of Juneau, and of a mainland strip extending approximately zi) miles along the coast. A topographic map of Admiralty Island has been compiled by Mr. Wright, and studies pursued by him during the summer of 1904 form the basis of the geologic map of this large island. A description of the Porcupine placer district by Mr. Wright has been issued by the Survey 0, and preliminary papers upon the general region and upon the Treadwell mines have been published by the writer. Acknowledgment is due the mining fraternity of the region for many courtesies, and the writer is especially indebted to the management of the Treadwell mines for facilities extended during the examination of these properties, and to Mr. William Ebner, of Juneau, for cooperation and historical data. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.