 | | Journal (article/letter/editorial) |
| 08 January 2015 The Occurrence of Porcelaneous Datolite in MichiganÕs Lake Superior Copper District Figure...beautiful yellow datolite nodule, 0.9 x 1.1 inches, recovered from the Hancock mine dump by John Perona...of a Keweenaw copper mine to the icy depths of Lake Superior, serious datolite collectors have sought...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 |
 | | Journal (article/letter/editorial) |
| ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net T he Lake Superior copper...of mines in the district, especially the Quincy mine. Crystals ranged in size from micro to large-cabinet...pumpellyite, and laumontite. Analcime, barite, datolite, apophyllite , natrolite, and microcline (variety...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 |
 | | Journal (article/letter/editorial) |
| quality rivaling fine porcelain. This unique form of datolite hails from the legendary Lake Superior copper...Indeed, many datolite nodules sport flecks of native copper, and specimens exist of datolite intergrown...ahead of the story. Michigan’s Copper Country datolite has been collected, prized, fashioned, and proudly...Keweenaw Peninsula’s datolite by diving into this article on the occurrence of datolite and the never-before-published...never-before-published collecting history of major datolite localities and collecting personalities. Stanley |
 | | Journal (issue) |
| iners with a large mass of native copper in the Quincy mine ca. 1918. (Michigan Technological University...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;...B. S. Butler who (with W. S. Burbank) wrote the classic work on the copper deposits of Michigan in 1929 |
 | | Journal (article/letter/editorial) |
| Rosemeyer 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Keweenaw Figure 1. A delicate...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...Mineral Finds in Michigan’s Copper Country T he Michigan Copper Country, also known as the Lake Superior...into Lake Superior at the western end of Upper Michigan. The now-dormant copper mining industry, which |
 | | Journal (article/letter/editorial) |
| February 2015 Figure 2. A generalized map of the Michigan copper district showing the location of new finds...arborescent copper crystal groups cached at the Central mine town site, (2) copper crystals recovered from Lake...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 |
 | | Journal (article/letter/editorial) |
| 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... resulting in the slow disappearance of smaller mine dumps. The end of copper mining in the Portage Lake...of the Copper Range Company’s Champion mine in Houghton County. Downloaded by [Florida State University] |
 | | Journal (article/letter/editorial) |
| Copper-bearing Amygdaloidal Lode Houghton County, Michigan Lake Superior Native Copper District Sixteenth...ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net T he Lake Superior native...native copper district, also known as the Michigan Copper Country, is located on the sparsely populated, isolated...into Lake Superior near the western end of Upper Michigan. The Keweenaw winters can be long and cold with...feet (6,400 vertical feet), making it the deepest mine shaft in the Western Hemisphere. Tom Rosemeyer collection |
 | | Book |
| 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 |
 | | Report (issue) |
| 1976 COVER Shown is a porcelanoid mass of flesh colored datolite, a borosilicate (CaBSiO4OH) vesicle...vesicle filling from a basaltic Houghton County lava flow. Small specks of native copper occur as inclusions...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 |
 | | Journal (article/letter/editorial) |
| istory and Mineralogy of the Indiana Mine Ontonagon County, Michigan Ninth in a series of articles on the...No. 2 (Indiana Copper Company) mine dump in Ontonagon County, Michigan. The individual crystals, which...State Highways 26 and 38 (Lake Mine Junction) in northern Ontonagon County. The property consists of 1,280...2-square-mile property is owned by the state of Michigan and is traversed by Highway 26 on the northwest...Mineralization Volcanic rocks that crop out in the mine area are part of the Portage Lake Volcanics (PLV) |
 | | Journal (article/letter/editorial) |
| 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...the secondmost-productive lode discovered in the Michigan copper district. In the heyday of mining it became...accessory minerals including analcime, calcite, datolite, epidote, microcline, natrolite, prehnite, and...miners until 1967 when all mining ceased. Many of the mine dumps have disappeared through the years because |
 | | Journal (issue) |
| Running for fifteen days from February 1–15, the city of Tucson plays host to literally hundreds of vendors.............. 11 Porcelaneous Datolite of the Keweenaw Peninsula, Michigan ..............................I can remember, my family has always had a gold mine claim. But during the Second World War, all gold...was not like other mining areas such as Virginia City which followed a vein. The Calico silver deposits...Dakota, we noticed a sign saying, “Join us at our County Fair.” We thought it would be a good way to walk |
 | | Journal (article/letter/editorial) |
| Counties, Michigan TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net...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 |
 | | Journal (issue) |
| MICHIGAN COPPER! The Mineralogical Record JANUARY-FEBRUARY 2023 ? VOLUME 54 ? NUMBER 1 ? $40 ... KRISTALLE Est.1971 Laguna Beach, California, USA • Tel: +1 949 494 5155 • Email: info@kristalle.com...................3 by W. E. Wilson The Keweenaw County Fissure Mines........................................13 by C. J. Stefano The Cliff Mine, Keweenaw County, Michigan...................................... Stefano & P. Persson The Central Mine, Keweenaw County, Michigan................................... |
 | | Journal (article/letter/editorial) |
| porcelaneous datolite nodules resembling the outer surface of cauliflower are indigenous to the Michigan Copper...in museums and private collections. The Mesnard mine, also known as the Quincy No. 8 shaft, is located...1.2 miles northeast of the historic Quincy No. 2 mine. The restored Quincy No. 2 shaft house and adjoining...No. 8) mine by Homestake Copper Company in 1976 for underground exploration. All of the datolite nodules...84,095 pounds of copper (Butler and Burbank 1929). Tributers worked the mine for a few years, and then |
 | | Journal (article/letter/editorial) |
| 1632 Camp Bird Mine Road P.O. Box 586 Ouray, Colorado 81427 I first went to the mine in the spring of...botryoidal nodules of pink to red porcelanous datolite along with na tive copper and, more rarely, native...epidote. In 1985 mineral rights for the Caledonia mine were bought by Richard Whiteman, president of Red...rehabilitated the No. 4 adit of the mine and are presently operating the mine for the re covery of mineral...collecting trips. Over the past five years the Caledonia mine has produced many fine hand specimens and an abundance |
 | | Journal (issue) |
| competition. Questions may be directed to Metje Butler, Education Chairperson, at 244-3659. Cash awards:...Retreat Recap Alan Hills Stayed overnight near Ontonagon on the Lake Superior shoreline. I walked along...Caledonia Mine near Adventure Mine. I had signed up for a full day of mining inside the mine. I had never...others in our party plus the two trip guides. The mine was cool but we all stayed warm moving rock (spoil...through about 4 feet of rock. Once the floor of the mine is reached, the going is maybe easier since the |
 | | Journal (article/letter/editorial) |
| attributed to the Owl Creek fissure of the Copper Falls mine, this complex 3.2-cm crystal is perched on a matrix...3rd level of the Gribble vein in the Copper Falls mine. Of all the copper specimens recovered from the...calcite crystals recovered from the Copper Falls mine in the early days of mining. The sharp, limpid 4...recovered in the Copper Country in recent times. On the mine surface, beautiful microcrystals of analcime and...Petherick mine workings along the Copper Falls fissure. 320 ROCKS & MINERALS Clark Mine The Clark mine, about |
 | | Book |
| 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.... and Michigan. Dow Chemical has reported finding diamonds in the kimberlites of upper Michigan, and vast...shoreline on both Lake Superior and Lake Michigan. Michigan is the state with the most shoreline on these...fresh water seas, with waters of Lake Superior, Michigan and Huron virtually surrounding it. Illinois and |
 | | Journal (article/letter/editorial) |
| 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...650-654 (1900). 643 IRA KLEIN on which the Calumet Mine was sunk, pointing out its adularialike habit and...is aware of only two such localities outside of Michigan from which secondary feldspar is reported. A "pink |
 | | Journal (article/letter/editorial) |
| Houghton County, Michigan TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...of the dense basalt matrix at the Wolverine No. 2 mine dump. These small and inexpensive detectors have...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...excavating the agatebearing zone of the Wolverine No. 2 mine dump during the annual Copper Country Mineral Retreat |
 | | Journal (article/letter/editorial) |
| THE CLIFF MINE, discovered in 1844, is located on the Keweenaw Peninsula of Upper Michigan in the heart...first mine on the "Keweenaw" to pay dividends to stockholders. Throughout its history, the mine also produced...the l700s British traders visited the famous Ontonagon Boulder and reduced its size by hand-chiseling...of Upper Michigan, started his mining career with Calumet and Hecla as an underground mine geologist...Company. The Cliff mine, in a few short years, would be the first great copper mine to be worked in the |
 | | Journal (article/letter/editorial) |
| from a large vug in the fissure vein of the Cliff mine; the largest crystal is 2 cm across. The specimen...Probably the best arborescent silver from the Cliff mine, this specimen is 9.5 × 10.5 cm and was originally...Jaszczak photo. Figure 18. This calcite from the Cliff mine is 3.6 cm long and perched on a matrix of spongy...on earth (Bornhorst and Rose 1994). At the Cliff mine it thickens to more than 1,300 feet and remains...was mined along some of the veins (Butler and Burbank 1929). Cliff Mine After the failed 1844 mining venture |
 | | Journal (article/letter/editorial) |
| COPPER-BEARING FISSURE VEINS Keweenaw County, Michigan Downloaded by [University of Delaware] at 05:05...crystallized copper specimen came from the Central mine and was in the collection of Donald C. Gabriel....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...Clark mine 14. Point prospect 15. Mendota mine 16. Gull Rock fissure and Laker pocket Figure 3. A 1900 |
