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| large mass of native copper in the Quincy mine ca. 1918. (Michigan Technological University Archives, Houghton)...Donald Pearce (1941-1989) The “Copper King” The MICHIGAN COPPER COUNTRY L. W i l s o n New Mexico Bureau...t a n l e y J. D y l II Seaman Mineral Museum Michigan Technological University % 1992 T h e M in e...crystal group, 13.6 cm, from an unknown mine in the Michigan Copper Country. Richard A. Kosnar collection;...wrote the classic work on the copper deposits of Michigan in 1929. Photo by Wendell E. Wilson. TENT . |
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| chlorite and celadonite. The soft clay content in the basalt cushions the hammer blows allowing complete removal...TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Up Twenty-first in...Agates from Lake Superior KEWEENAW COUNTY, MICHIGAN Tom Rosemeyer is a native of Upper Michigan and a graduate...graduate of Michigan Technological University. He now spends a good part of the year in the Copper Country...the Lake Shore Traps along the scenic shoreline of Lake Superior at Esery Park, Keweenaw County. Larry |
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| Mineralogy of Michigan by E. W. Heinrich updated and revised • by George W. Robinson M By E W~ Hellnr]ch...Museum Michigan Technological University Houghton, Michigan 49931 2004 © MINERALOGY OF MICHIGAN 3 FOREWORD...FOREWORD Michigan has a long and varied geologic history that includes repeated episodes of volcanism...before the first Europeans set foot here. When Michigan became a state in 1837, one of the first actions...and we continue to learn more about them today. Michigan minerals helped to build the state and nation |
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| (CaBSiO4OH) vesicle filling from a basaltic Houghton County lava flow. Small specks of native copper occur...the surface and between the nodular masses. The Michigan Bicentennial symbol (back cover) incorporates...Survey Division BULLETIN 6 THE MINERALOGY OF MICHIGAN by E. Wm. Heinrich Professor of Mineralogy and...University of Michigan Ann Arhor, Michigan Lansing, Michigan 1976 STATE OF MICHIGAN WILLIAM G. Mrr...State of Michigan CL '48 s.321.6. Printed by Speaker-Hines and Thomas, Inc., Lansing, Michigan. Available |
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| water on the bottom of Lake Superior near Eagle Harbor, Keweenaw County, Michigan. The near-shore find...Pocket, was located in a fissure vein cutting the Lake Shore Traps; it was discovered by Bob Barron and...years’ experience in exploring the depths of Lake Superior. The two-day recovery of the contents of the...Proterozoic Midcontinent rift system occupies the Lake Superior basin, which over a period of geologic time...filled with thick sequences of basalt and clastic sedimentary rocks. The basalt flows and intercalated sedimentary |
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| Country Figure 1. A July 2000 view of the Lake Superior shoreline looking northeast from the Sunset...gravel bars along the shoreline shift with Lake Superior storms, exposing calcite/quartz veins in the...Tom Rosemeyer is a native of Upper Michigan and a graduate of Michigan Technological University in Houghton...year. During the last four years, the crushing of mine dumps (poor-rock piles) for road repairs and construction...operations, primarily in Keweenaw County, have increased the need for mine-run rock for the construction |
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| TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net All mineral photography...History and Mineralogy of the St. Louis Mine Houghton County, Michigan Twentieth in a series of articles...at the St. Louis mine, located about 1.3 miles east of the village of Laurium, Michigan. This little-known...microcrystals in amygdules contained in a lava flow top. The mine has also yielded uniquely banded agates that occur...locality for copper-included agates in the Lake Superior native copper district. Figure 1 (top left |
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| MICHIGAN COPPER COUNTRY Figure 1: Shaft house of the Ahmeek mine, Keweenaw County. 1962 photo by Terry...been and probably never will be anything like the Michigan Copper Country. For the mineral-minded, it is...native metal. For the collector, its scores of old mine dumps never cease to provide rewards of specimens;...Michigan's Upper Peninsula into the cold waters of Lake Superior. History The history of this region goes back...explorations on which Michigan laid its claim to the region. Houghton lost his life in a Lake Superior storm, but |
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| Caledonia Street Calumet, Michigan 49913 datolite@charter.net T he Lake Superior copper district is world...of mines in the district, especially the Quincy mine. Crystals ranged in size from micro to large-cabinet...occur in the Portage Lake Volcanics that form the south limb of the Lake Superior syncline. Native copper...in the tenth grade. I have collected most of the mine dumps during the past sixty years and have found...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton |
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| Tom Rosemeyer 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Keweenaw Figure 1...of copper crystals collected at the Ojibway No. 1 mine in summer 2009 by Steve Whelan. The specimen is...Copper Country Figure 2. Generalized map of the Michigan copper district showing the location of the new...Copper Country T he Michigan Copper Country, also known as the Lake Superior native copper district...Peninsula, which juts out into Lake Superior at the western end of Upper Michigan. The now-dormant copper mining |
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| Keweenaw Counties, Michigan TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...Houghton and Keweenaw counties, Michigan. Every summer in the Copper Country, mine dumps from a bygone era of...copper mining are being crushed and hauled off the mine sites. The crushed rock is mainly used for road...and recover copper that mistakenly ended up in the mine dumps. The lucky person may also find silver in...locality. Collected at the Tamarack Jr. No. 1 mine, Houghton County, by Tom Rosemeyer, 11 August 2012. John |
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| Lode Houghton County, Michigan TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...agates in chunks of the dense basalt matrix at the Wolverine No. 2 mine dump. These small and inexpensive...agate itself. Collected by Ray Just, C & H No. 21 mine, 10 July 2011. uring the past sixty years (1952–2012)...various mine dumps along the Kearsarge copper-bearing amygdaloidal lode in Houghton County, Michigan. These...makes them, along with the regular waterworn Lake Superior “lakers,” found in gravel pits and on beaches |
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| Occurrence of Porcelaneous Datolite in MichiganÕs Lake Superior Copper District Figure 1. A rare and beautiful...nodule, 0.9 x 1.1 inches, recovered from the Hancock mine dump by John Perona in 1972. John Perona specimen...the bowels of a Keweenaw copper mine to the icy depths of Lake Superior, serious datolite collectors have...combination. Imagine descending a steep 2,000-foot-deep mine shaft in the dead of a Keweenaw winter with only...over heels into the black depths of an abandoned mine. All of this effort was expended on clandestine |
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| Copper-bearing Amygdaloidal Lode Houghton County, Michigan Lake Superior Native Copper District Sixteenth in...Caledonia Street Calumet, Michigan 49913 datolite@charter.net T he Lake Superior native copper district...district, also known as the Michigan Copper Country, is located on the sparsely populated, isolated, and scenic...Peninsula that juts out into Lake Superior near the western end of Upper Michigan. The Keweenaw winters can...can be long and cold with lake-effect snow accumulations of 200–300 inches not uncommon. The summer season |
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| Calumet, Michigan 49913 tajmahal@gilanet.com History and Mineralogy of the Manganese Mine Keweenaw...Keweenaw County Michigan Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological...ocated in the rugged Keweenaw Peninsula of Upper Michigan are two small manganese oxide deposits that occur...and calcite that crops out on the north shore of Lake Manganese along the west bank of Manganese Creek...Figure 2. Tom Rosemeyer about to descend into the mine through the small surface opening that led to the |
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| Specimen I- 28Qj 0° A®ATE, North Shore, Lake Superior, Michigan, USA. Polished pebble showing concentric... Small Ml. £4 £4-°0 HOWLITE, Lang, California, USA. Looks like stone brains, chalklike porcelaneous...ORE, mostly GALENA, Hidden Treasures Mine, Nevadaville, Colorado, USA. Mass of pure ore body mainly galena...sulphide. RF SPC. C. £4 £5.00 JASPER/AGATE, Texas, USA. Polished slab of rich green and orange mixture....£5.00 PETRIFIED WOOD, Quincy, Washington State, USA. Polished slab showing original wood grain structure |
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| February 2015 Figure 2. A generalized map of the Michigan copper district showing the location of new finds...cached at the Central mine town site, (2) copper crystals recovered from Lake Superior at the Gull Rock fissure...fissure vein, (3) hundreds of copper from the Indiana mine, and (4) more than two hundredV aecilS mens of ...analcime/calcitecrystal groups from the Rhode Island mine. This article describes these and other finds made...the White Pine mine at the southern end of the district. Keweenaw Point, Keweenaw County The waters off |
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| unique form of datolite hails from the legendary Lake Superior copper deposits, home to the world’s largest...Dyl II, Director A. E. Seumnii Mineral Museum Michigan Technological University 170 ROCKS 81MINERALS...81MINERALS ’ .1-. . TOM ROSEMEYER 1632 Camp Bird Mine Road P.O. Box 586 Ouray, Colorado 81427 rosemeyer@ocinet...glassy complex crystals of varied habit. In the Lake Superior copper district it occurs both as crystals and...Portage Lake Volcanics. It can be found in fissure veins and brecciated amygdaloidal basalt lodes but |
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| (October 2017). 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Twenty-sixth in a...located in Keweenaw County, Michigan, was made by Doug Miller of Calumet, Michigan. Miller, a thirty-year...area about a half-mile northwest of the North Cliff mine. He had checked part of this area earlier in the...area dips gently toward Lake Superior, with a 1,250-foot-thick dense basalt flow (the Greenstone Flow)...thickness of 2,400 feet that comprise the Portage Lake Volcanics. The entire area was logged about one |
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| courtesy Michigan Technological University Archives and Copper Country Historical Collections, Michigan Technological...started with the closure of the Champion mine in Houghton County by the Copper Range Company in September...reserves (Fields 1997).This was the last native copper mine in operation by the Copper Range Company and was...came with the closing of the White Pine mine, Ontonagon County, in September 1995. New, stringent environmental...meet emission standards led to its demise. The Michigan Copper Country contains the largest-known native |
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| MICROCLINE IN THE NATIVE COPPER DEPOSITS OF MICHIGAN Ina KrorN, Stanf ord, U ni.oersity, C al'iJorni...intensive mining activity in the copper country of Michigan, and detailed study of the native copper deposits...amounts "in all the mines from Keweenaw Point to Ontonagon" in association with analcite, as the "last formed..."orthoclase" lining calcite-filled vugs in amygdaloidal basalt at the outcrop of the ore body l Foster, J. W....Whitney, J. D.,Report on the geology of the Lake Superior Land District: Erec. Doc., No. 4, Pt. 2,102 |
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| Amygdaloidal Lode Houghton and Keweenaw Counties, Michigan TOM ROSEMEYER PO Box 369, 506 Pine Street Magdalena...5.5 × 10.0 cm, attributed to the South Kearsarge mine. Author’s specimen, Terry Huizing photo. 276 ROCKS...brecciated amygdaloidal flow tops of the Portage Lake Volcanics (PLV). The lode was discovered in 1882...strike of the basalt flow and was the secondmost-productive lode discovered in the Michigan copper district...miners until 1967 when all mining ceased. Many of the mine dumps have disappeared through the years because |
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| Lakes States Wisconsin, Indiana, Illinois, Michigan, by June Culp Zeitner $5.95 Gem Guides Book...our knowledge and enjoyment of this great owners, mine and quarry operators and science by collecting....minerals can be found. In recent years the largest Lake Superior agate ever reported was found in Minnesota,... and Michigan. Dow Chemical has reported finding diamonds in the kimberlites of upper Michigan, and vast...is a Lake Superior State. Wisconsin has shoreline on both Lake Superior and Lake Michigan. Michigan is |
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| Keweenaw County, Michigan Downloaded by [University of Delaware] at 05:05 09 June 2012 Lake Superior Native...crystallized copper specimen came from the Central mine and was in the collection of Donald C. Gabriel....Figure 2. Map showing the northern part of the Lake Superior native copper district and the region with the...exploration 2. Cliff mine 3. Phoenix group of mines 4. Central mine 5. Northwestern mine 6. Central exploration...Resolute mine 9. Hard Rock fissure 10. Iron City (Empire) mine 11. Cape mine 12. Copper Falls mine 13. Clark |
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| Iuyw I , < h,,,rl,rp,, ,,I I r,,,,l>,l\ T HE MICHIGAN COPPER DISTRICT stretches in a southwest-northeast...from the White Pine mine in Ontonagon County to Copper Harbor in Keweenaw County. Copper mineralization...White Pine mine and (2) the world-class native copper deposits that occur in the Portage Lake Volcanics...conipany's articles of incorporation 1. The amygdaloidal basalt lodes were the next to be developed; they contain...this type of lode start- ed in 1856 at the Quincy mine. Later came the conglomeratehosted deposits, in |
