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| 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 |
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| Michigan Mineralogy: A LOCALITY INDEX TOM MORRIS, JR. 4553 Shenandoah Allen Park, Michigan 48101 Tom...occurrences. These localities have been listed by county; and, strictly for convenience, the list has been...compiling this information was The Mineralogy of Michigan (Heinrich, 1976), which should be consulted by...locality labeling of Michigan specimens. It should be pointed out that the list of Michigan mineral localities...None theless, with the aid of a good state or county map, plus local inquiries, the list could be helpful |
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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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| silver crystals, colorful porcelaneous nodules of datolite, and copper inclusions in calcite crystals come...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 |
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| 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 |
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| 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 |
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| 2017). 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Twenty-sixth in a series of...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...secTom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton...fissure vein section composed of prehnite and datolite with small blebs of silver. In the foreground |
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| 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] |
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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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| the Caledonia Mine, Ontonagon County, Michigan -- Downloaded by [University of Michigan] at 08:51 04...Caledonia mine, owned by Red Metal Minerals, is located at the southern end of the famous Michigan native...native copper district and is the last operating mine on the copper range. It is presently being operated...and Whiteman 1992). The early development of the mine included sinking shafts and driving adits on the...1873. In the same year Captain Martin leased the mine and sporadically operated it until 188 I , producing |
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| 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 |
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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...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 |
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| 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 |
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| articles on the Michigan Copper Country by Tom Rosemeyer (including the one in this issue), datolite has been...the topic of this Connoisseur’s Choice feature. Datolite crystals occur in many colors that range from...green, and pink to white and colorless; nodular datolite is typically white or pastel shades of pink, yellow...fluorescence characterizes some New Jersey datolite. Datolite is commonly seen in monoclinic (2/m) crystals...of some datolite and is derived from the Greek word dateisthal meaning “to divide.” Datolite is a calcium |
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| Photographs JanuaryFebruary: Rhodochrosite, N’Chwaning mine, Hotazel, South Africa. Martin Zinn specimens, Erica...Cryo-Genie mine, San Diego County, California. Natural History Museum of Los Angeles County specimen,...Ground Hog mine, Gilman, Eagle County, Colorado. Natural History Museum of Los Angeles County specimen...Colorado, 307 Actinolite/tremolite, Michigan, 344 Adularia, Michigan 341 “Alaskaite,” Colorado, 307 Albite...Amblygonite-montebrasite,California, 160 Analcime, Michigan, 339 The Andes Come to Arizona, R. W. Jones, 59 |
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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...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 |
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| Besse. 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net An UNUSUAL Glacial Silver...formed to where they would ultimately be found. In Michigan this took place during multiple periods of continental...collecTom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton...road construction on public property in Hancock, Michigan, on Monday evening, 17 August 2015. Jay and Chad...March/April 2016 177 Other Articles In This Upper Michigan Series Downloaded by [La Trobe University] at |
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| 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 |
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| 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 |
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| colored datolite, a borosilicate (CaBSiO4OH) vesicle filling from a basaltic Houghton County lava flow...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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| ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Up Twenty-first in a series...KEWEENAW COUNTY, MICHIGAN Tom Rosemeyer is a native of Upper Michigan and a graduate of Michigan Technological...shoreline of Lake Superior at Esery Park, Keweenaw County. Larry Maltby photo (July 2013). Figure 3. Map...Mineral Museum collection, Michigan Technological University, in Houghton, Michigan. olorful banded agates...agates, coined in about 1900 by Alfred C. Lane, a Michigan state geologist, has been used for the loose agates |
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| ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net All mineral photography by...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...of the flat-topped agateproducing mine dumps at the St. Louis mine. The foundation on the right was the |
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| ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Unearthed from a Pleistocene...August 2013 by Jay and Chad Just near Calumet, Michigan. The boulder was ripped loose from the conglomerate...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton...construction of Figure 2. Map showing Calumet, Michigan, where the glaciated copperbearing Calumet and...this article float Other Articles In This Upper Michigan Series Downloaded by [UNIVERSITY OF ADELAIDE |
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| 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...(Butler and Burbank 1929). Tributers worked the mine for a few years, and then the property was sold |
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| Value Specimen 12 £12.00 BARITE, Stoneham, Colorado, USA. Three adjoining transparent pale blue terminated...NATIVE SILVER with COPPER, Central Mine, Keweenaw Co . Michigan, USA. Growths of native silver protrude...NATIVE GOLD, American Tunnel, Silverton, Colorado, USA. Flecks of native gold <4mm on milky quartz/grey...MI. 77 £12.00 NATIVE GOLD, Homestake Mine, Lead,South Dakota, USA. Flecks of native gold <4mm with milky...NATIVE GOLD, American Tunnel, Silverton, Colorado, USA. Flecks of native gold <4mm on milky quartz/grey |
Michigan Mine, Rockland, Ontonagon County, Michigan, USA