Author: M. Clair SmithPublisher:
ISBN:
Category : Copper ores
Languages : en
Pages : 16
Book Description
Copper Deposits of Douglas County, Wis
Author: M. Clair SmithPublisher:
ISBN:
Category : Copper ores
Languages : en
Pages : 16
Book Description
Preliminary Report on the Copper-bearing Rocks of Douglas County, Wisconsin
Author: Ulysses Sherman GrantPublisher:
ISBN:
Category : Copper
Languages : en
Pages : 92
Book Description
Preliminary Report on the Copper-Bearing Rocks of Douglas County, Wisconsin (Classic Reprint)
Author: Ulysses Sherman GrantPublisher: Forgotten Books
ISBN: 9781332811977
Category : Science
Languages : en
Pages : 646
Book Description
Excerpt from Preliminary Report on the Copper-Bearing Rocks of Douglas County, Wisconsin The method followed in the season's field work was to visit all parts of the two areas above mentioned which were known to have rock outcrops, or in which outcrops might be reasonably expected. In. Such parts north and south traverses were made at intervals of one-half mile, or more frequently when occasion demanded. Thus, in the region where outcrops occur fre quently, the north and south section. Lines, the north and south quarter section lines and some of the east and west section lines were followed. The larger streams, and in fact all the streams which might be expected to cut down to the bed rock, were also followed. The outcrops seen were located carefully by pacing, and the position of each was indicated as so many paces north and so many paces west of the southeast corner of the given section. In this manner of locating paces equals one mile. Rock samples were taken from most of these outcrops. In all about 775 rock numbers and a considerably greater num ber of specimens were collected. 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.
Investigation of Chippewa Copper-nickel Prospect Near Rockmont, Douglas County, Wis
Author: R. W. HollidayPublisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 20
Book Description
Description of the Copper Creek Mining Location in Douglas County, Wisconsin
Author: George Riley StuntzPublisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 12
Book Description
Preliminary Report on the Copper-Bearing Rocks of Douglas County, Wisconsin
Author: Wisconsin Geological and Natural HistoryPublisher:
ISBN: 9781358340031
Category :
Languages : en
Pages :
Book Description
Description of the Copper Creek Mining Locating in Douglas County, Wisconsin
Author: James Otis SargentPublisher:
ISBN:
Category : Copper
Languages : en
Pages : 12
Book Description
Arguments and Facts about Copper and Gold in Douglas County, Wisconsin
Author: Publisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 15
Book Description
INVESTIGATION OF CHIPPEWA COPPER-NICKEL PROSPECT NEAR ROCKMONT, DOUGLAS COUNTY, WIS.
Author: United States. Bureau of MinesPublisher:
ISBN:
Category :
Languages : en
Pages : 10
Book Description
A Theoretical Basis for Exploration for Native Copper in Northern Wisconsin
Author: Walter Stanley WhitePublisher:
ISBN:
Category : Copper ores
Languages : en
Pages : 28
Book Description
Exploration for native copper in the Keweenawan lavas of northern Wisconsin has been concentrated in areas of relatively shallow overburden that have sparse to numerous outcrops. Lack of success of this exploration suggests that if large deposits, comparable to those of northern Michigan, are present, they are more likely to be found in one or more of the large tracts that have few, if any, exposures, away from the ' copper ranges. ' A hydrologic model that may explain the mineralization of the classic native-copper district of Michigan could be helpful in suggesting that certain covered tracts are more favorable than others, and in narrowing the targets for physical exploration within these tracts. This model involves updip migration of a hydrothermal fluid of metamorphic origin, formed when ground water contained in the interstices of lava flows and conglomerate beds was carried to great depth along the axis of the Lake Superior syncline. The largest reservoirs of such buried ground water would be expected in the peripheral rather than central parts of the basins in which the lavas originally accumulated because the ratio of porous fragmental flow tops and conglomerate beds to massive basalt should increase towards the margins of a basin. Thus, the areas most promising for copper deposits should be those updip from places where the trough of the later formed Lake Superior syncline crosses the marginal parts of a lava basin. (Woodard-USGS)