2 edition of Natural ventilation of Michigan copper mines found in the catalog.
Natural ventilation of Michigan copper mines
George Edward McElroy
|LC Classifications||TN1 .U6 no. 516|
|The Physical Object|
|Pagination||iii, 40 p.|
|Number of Pages||40|
|LC Control Number||32026590|
The era around BC saw more than , tons of copper being mined in the so-called Upper Peninsula, in the American state of Michigan. The largest mine was on Isle Royale, an island in Lake Superior, near the Canadian border. Here, there are thousands of prehistoric copper pits, dug thousands of years ago by ancient peoples unknown. Eagle Mine: Marquette County, Michigan: Lundin Mining: Underground mine producing nickel and copper concentrates 18 () 15 Phoenix Lander County, Nevada: Newmont Mining Corporation: Gold-copper ore, concentrated and leached 16 () 16 Lisbon Valley San Juan County, Utah: Lisbon Valley Mining Company Copper ore, open pit, heap leached
WORKING IN THE COPPER MINES The mining frontier added a new dimension to Michigan's population. The dominance of New England stock, so marked in the settlement of the farmer's frontier of southern Michigan, was notably absent in the mining country, although Boston dollars were heavily invested in the copper mines. The rich copper sulfide ores found in the old stopes of Arizona metal mines have a history of spontaneous combustion of sulfide ore releasing sulfur .
Evidence shows that someone was mining copper in northern Michigan starting around 5, BC. It continued until 1, BC. Around 1, AD mining was restarted and lasted until 1, AD. The largest mine discovered was located on Isle Royale, an island in . Mining continued throughout the early to midth century, reaching its height in , when Michigan produced over million pounds of copper in one year. Flickr/upnorthmemories As modernization continued throughout the states, the mines slowly lost their influence in the area.
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Technical paper issued by the Bureau of Mines over the ventilation of copper mines in Michigan. Natural ventilation of the mines and mining conditions are discussed. This report includes tables, maps, and : G. McElroy. Additional Physical Format: Electronic version: McElroy, G.E. (George Edward), Natural ventilation of Michigan copper mines.
Washington: U.S. Govt. Print. Local Exhaust Ventilation Figure Mine section ventilation map airflow Figure Mine section ventilation map airflow with controls and fan Figure “Y” split with air quantities Figure Rectangle Figure Circle Figure Triangle Figure File Size: KB.
Ventilation. Methane Example Section (b). Actions for excessive methane continued. When one and one-half percent or more methane is present in a working place or an intake air course, including an air course in which a belt conveyor is located or an area where mining equipment is being installed or removed, only work necessary.
a complete mine, first, with natural ventilation only, then for the more usual situation of a combination of fans and natural ventilation.
In all cases, the analyses utilize pressure-volume (PV) and temperature-entropy (Ts) diagrams. This chapter assumes familiarity with the basic concepts and relationships that are developed in Chapter 3.
The Shipping of Michigan Copper across the Atlantic in the Bronze Age (Isle Royale and Keweenaw Peninsula, c. BC BC) Summary. Recent scientific literature has come to the conclusion that the major source of the copper that swept through the European Bronze Age after BC is unknown.
The copper district of Keweenaw Point, in the northern peninsula of Michigan, is the second largest producer of copper in the world. The output of the district since has been more than 7, pounds and showed a rather steady and consistent increase from the beginning of production to the end of the World War insince which there has been a marked decrease.
Michigan’s Copper Country – CMG 92 01 - page 2 of Preface Few people realize that Michigan's copper had a greater economic impact than the California Gold rush. "Michigan's Copper Country" lets you experience the excitement of the discovery and development of the copper industry.
This publication is. Central Mine was the most productive of all the fissure deposit mines, producing nearly 52 million pounds of copper before playing out.
After 44 years of operation, the Central Mining Company closed the operation on Jand the town of Central became a ghost town. The mine opened in and operated until and is a native copper mine typical of the Keweenaw area. Underground tours are offered seven days a week throughout the summer and include options ranging from basic 45 minute underground walks to an extensive 6 hour tour of the second level, requiring guests to walk, rappel, crawl, and climb.
Mhc A nice specimen of natural Copper from Keweenaw Peninsula, Michigan. This is natural native copper which has been mostly removed from the matrix rock which was surrounding it.
There is matrix rock visible in many areas of the specimen. It measures 3 5/8" x 1 7/8" x 7/8" thick and weighs just over 8 ounces.
Another photo. Copper Mining History. Fort Wilkins, Copper Harbor, Michigan Historic Michigan State Park. A 19th century military post with 19 restored buildings, slide programs, living history programs.
Park Store. Book Store. Camping by Lake Fanny Hooe. Ghost Towns of the Copper Mining Age. Fortunately, the mining history of the Michigan Copper Country has been well documented. The READINGS AND REFERENCES list below provides a starter set of excellent books and other publications.
There are dozens more and new titles appear frequently. Several excellent websites specialize in Michigan copper mining history. In his text entitled Ancient Copper Mines of Lake Superior, John Jacob Houghton relates, beginning on page On the south shore of Lake Superior the works of the ancient miners extend over a district of country comprising what is known as the Trap Range, having a length of one hundred and fifty miles through Keweenaw, Houghton and Ontonagon Counties, Michigan, with a.
The Michigan Copper Mining Co. holdings consisted of 4, acres of mineral land, 1, acres of timber land and a acre mill site. This included the sites and of the old Minesota, Superior and Rockland mines.
The new workings eventually included A, B, C and E shafts. Lodes worked were the Calico, Evergreen and Ogima.
Natural Ventilation of Michigan Copper Mines Page: 29 iii, 40 p.: ill., maps ; 23 cm. This book is part of the collection entitled: Technical Report Archive and Image Library and was provided to UNT Digital Library by the UNT Libraries Government Documents : G.
McElroy. STATE OF MICHIGAN MICHIGAN GEOLOGICAL AND BIOLOGICAL SURVEY Publication 6. Geological Series 4. liable to be affected by the ventilation of the mines. We are able to make better inferences from diamond drill Champion Copper mine, in at the Champion Iron mine and Freda, and I have other notes all tabulated.
On Monday, Feb. 6, the Michigan Department of Natural Resources announced that Highland Copper of Quebec began drilling the first of 21 mining exploration holes, 12 of which are in a. The copper deposit at the White Pine mine in Ontonagon County, Michigan, is the largest known copper-shale deposit in the United States.
It lies within a belt of copper mineralization extending from Mellen, Wisconsin, to the eastern-most edge of the. The Michigan State Geologist Douglass Houghton (later to become mayor of Detroit) reported on the copper deposits inwhich quickly began a rush of prospectors.
Mining took place along a belt that stretched about miles southwest to northeast through Ontonagon, Houghton, and Keweenaw counties.: 16–17 Isle Royale, on the north side of Lake Superior, was extensively explored, and a.
Metallurgical ContentNECESSITY FOR MECHANICAL VENTILATIONMAIN AIR CURRENTSDISTRIBUTION OF AIR TO WORKING FACESCOST AND RETURNSSUPERVISIONCONCLUSION Something that all of the various and mining techniques have in common board and pillar, stoping, caving, long wall mining; is that they take place in underground environments where fresh air does not naturally occur.
Not surprisingly, ventilation.Michigan has 1, identified mines listed in The Diggings™. The most commonly listed primary commodities in Michigan mines are Iron, Copper, and the time these mines were surveyed, mines in Michigan were observed to have ore mineralization in an outcrop, shallow pit, or isolated drill hole—known as an occurance mine.
1 Michigan has prospect mines. 2 mines were in.Exception: The whole-house mechanical ventilation system is permitted to operate intermittently where the system has controls that enable operation for not less than percent of each 4-hour segment and the ventilation rate prescribed in Table M(1) is multiplied by the factor determined in accordance with Table M(2).