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| porcelain. This unique form of datolite hails from the legendary Lake Superior copper deposits, home to the world’s...occurrence of native copper. Indeed, many datolite nodules sport flecks of native copper, and specimens exist...exist of datolite intergrown with copper crystals, but that’s getting ahead of the story. Michigan’s Copper...Copper Country datolite has been collected, prized, fashioned, and proudly displayed in private mineral...of the Keweenaw Peninsula’s datolite by diving into this article on the occurrence of datolite and the |
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| The Occurrence of Porcelaneous Datolite in MichiganÕs Lake Superior Copper District Figure 1. A rare and...beautiful yellow datolite nodule, 0.9 x 1.1 inches, recovered from the Hancock mine dump by John Perona...the bowels of a Keweenaw copper mine to the icy depths of Lake Superior, serious datolite collectors have...descending a steep 2,000-foot-deep mine shaft in the dead of a Keweenaw winter with only mud and ice for...over heels into the black depths of an abandoned mine. All of this effort was expended on clandestine |
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| News from the Keweenaw Downloaded by [Florida State University] at 18:43 12 November 2014 Part 3—Recent...Michigan’s Copper Country Eleventh in a series of articles on the mines and minerals of Michigan’s Copper Country...Superior storms, exposing calcite/quartz veins in the Copper Harbor Conglomerate. Author’s photo. TOM ROSEMEYER...minor and major, continue to be made in Michigan’s Copper Country. The May/June 1998 and the November/December...years have passed since the last “News from the Keweenaw”; this article updates new finds to the spring |
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| with a large mass of native copper in the Quincy mine ca. 1918. (Michigan Technological University Archives...of Donald Pearce (1941-1989) The “Copper King” The MICHIGAN COPPER COUNTRY L. W i l s o n New Mexico...t a n l e y J. D y l II Seaman Mineral Museum Michigan Technological University % 1992 T h e M in e...COVER: Native copper crystal group, 13.6 cm, from an unknown mine in the Michigan Copper Country. Richard...Burbank) wrote the classic work on the copper deposits of Michigan in 1929. Photo by Wendell E. Wilson. |
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| the Copper Falls mine, this complex 3.2-cm crystal is perched on a matrix of crystallized copper. The...Figure 49. Perhaps the finest cubic copper crystal recovered in the Copper Country in recent times. The 1...level of the Gribble vein in the Copper Falls mine. Of all the copper specimens recovered from the clay...finest calcite crystals recovered from the Copper Falls mine in the early days of mining. The sharp, limpid...striking contrast with the rugged surface of the copper matrix. The specimen was part of the L. L. Hubbard |
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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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| 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...some browns and darker reddish shades imparted by copper inclusions. It exhibits a vitreous luster and is...fluorescence characterizes some New Jersey datolite. Datolite is commonly seen in monoclinic (2/m) crystals |
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| Calumet, Michigan 49913 datolite@charter.net Keweenaw Figure 1. A delicate group of copper crystals...crystals collected at the Ojibway No. 1 mine in summer 2009 by Steve Whelan. The specimen is 12.4 × 6.2 cm and...minerals of Michigan’s Copper Country Figure 2. Generalized map of the Michigan copper district showing the...Michigan’s Copper Country T he Michigan Copper Country, also known as the Lake Superior native copper district...scenic Keweenaw Peninsula, which juts out into Lake Superior at the western end of Upper Michigan. The |
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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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| Vein in Michigan’s Keweenaw Peninsula TOM ROSEMEYER Figure 1. The best silver/copper specimen recovered...composed of silver and lesser amounts of copper. The silver/copper was encased in weathered prehnite that...2017). 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Twenty-sixth in a series of...articles on the mines and minerals of Michigan’s Copper Country O n 16 August 2017 an impor- tant discovery...vein located in Keweenaw County, Michigan, was made by Doug Miller of Calumet, Michigan. Miller, a thirty-year |
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| ........... 11 Porcelaneous Datolite of the Keweenaw Peninsula, Michigan ..............................by the editor. Editor: Phyllis B. George 22407 Park Point Drive Katy, TX 77450-5852 Phone: (281) 395-3087...I can remember, my family has always had a gold mine claim. But during the Second World War, all gold...Los Angeles, California in an area called Highland Park, about seven miles from L.A., when I was 17 years...GAZETTE FEBRUARY 2014 equipment except the Highland Park saws and a few other items. Remember, this was before |
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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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| porcelaneous datolite nodules resembling the outer surface of cauliflower are indigenous to the Michigan Copper...Superior native copper district), home of the world’s largest deposits of native copper. The porcelaneous...cut and polished nodules have been a part of the Copper Country collecting scene for more than 150 years...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 |
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| Calumet, Michigan 49913 datolite@charter.net An UNUSUAL Glacial Silver Find In Michigan’s Keweenaw Peninsula...the mines and minerals of Michigan’s Copper Country F loat copper and silver are defined as chunks of... In Michigan this took place during multiple periods of continental glaciation that the Keweenaw Peninsula...experienced over the past 2 million years. The copper and silver were transported by glacial ice, and...ice sheet, the copper and silver were dropped in place. Spectacular masses of float copper have been found |
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| Through the Scope Copper Inclusions in Quartz Microcrystals From Michigan’s Keweenaw Peninsula TOM ROSEMEYER...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...the heyday of copper mining (1860–1940). This article focuses on the lesser-known copper inclusions in...been collected throughout the district. The native copper deposits occur in the Portage Lake Volcanics that |
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| colored datolite, a borosilicate (CaBSiO4OH) vesicle filling from a basaltic Houghton County lava flow...native copper occur as inclusions near the surface and between the nodular masses. The Michigan Bicentennial...the Bicentennial celebration: "to forge a new national commitment, a new spirit for '76, a spirit which...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 |
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| ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Up Twenty-first in a series...Michigan’s Copper Country from the Depths Underwater Recovery of Agates from Lake Superior KEWEENAW COUNTY...COUNTY, MICHIGAN Tom Rosemeyer is a native of Upper Michigan and a graduate of Michigan Technological University...University. He now spends a good part of the year in the Copper Country researching and writing articles on the...scenic shoreline of Lake Superior at Esery Park, Keweenaw County. Larry Maltby photo (July 2013). Figure |
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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...and minerals of Michigan’s Copper Country Figure 2. An exceptional copper-included agate, measuring 0...central circular red banding contains micro-sized copper inclusions; the rim of the agate contains more...at the St. Louis mine, located about 1.3 miles east of the village of Laurium, Michigan. This little-known |
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| University University Michigan Townsend Drive Drive 1400Townsend 1400 Houghton, Houghton, Michigan Michigan49931-1...J. the Keweenaw Peninsula, Michigan: Institute on Lake Superior Geology Proceedings, Keweenaw Peninsula...Peninsula, Michigan: Institute on Lake Superior Geology Proceedings, 40th 40thAnnual AnnualMeeting, Meeting..."Field Guide to the Geology Geology of the the Keweenaw Keweenaw Annual Institute Institute on on Lake Lake...Lake Superior Superior Geology Peninsula, Michigan" Michigan" (Bornhorst (Bornhorst and others, 1983) for |
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| Houghton and Keweenaw Counties, Michigan TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...articles on the mines and minerals of Michigan’s Copper Country his article details the discovery and...in Houghton and Keweenaw counties, Michigan. Every summer in the Copper Country, mine dumps from a bygone...bygone era of copper mining are being crushed and hauled off the mine sites. The crushed rock is mainly...the Copper Country there is a cadre of people using metal detectors to locate and recover copper that |
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| Calumet, Michigan 49913 datolite@charter.net Unearthed from a Pleistocene Grave In Michigan’s Keweenaw Peninsula...articles on the mines and minerals of Michigan’s Copper Country Figure 1. Google Earth photo showing the...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...Houghton. He now spends a good part of the year in the Copper Country collecting and writing articles about the |
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| 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...gemgypsy@bellsouth.net JANUARY–FEBRUARY 2023 Articles Copper Country II Introduction..............................................3 by W. E. Wilson The Keweenaw County Fissure Mines....................................13 by C. J. Stefano The Cliff Mine, Keweenaw County, Michigan................................... |
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| COPPER-BEARING FISSURE VEINS Keweenaw County, Michigan Downloaded by [University of Delaware] at 05:05...05:05 09 June 2012 Lake Superior Native Copper District Fifteenth in a series of articles on the mines...Michigan’s Copper Country 298 ROCKS & MINERALS Figure 1. Considered by some to be the finest copper specimen...world, this 6 × 8-cm crystallized copper specimen came from the Central mine and was in the collection of...and the piece is now on display in the special Copper Country collection case; Jeff Scovil photo. Downloaded |
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| MICHIGAN and the LAPIDARY R U S S E L L P. MACFALL P.O. Box 309 Coronado, California 92118 Figure...in the sedimentary heartland of our continent, Michigan has perhaps more to offer the paleontologist than...stone—is primarily a trophy of the former. But Michigan is a big state, and its northern edge in cludes...Hexagonaria percarinata, is the official state stone of Michigan. It is a colonial fossil found in Devonian period...Lower Peninsula counties of Charlevoix, Presque Isle, Emmet, Cheboygan, and Alpena. Most of the familiar |
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| February 2015 Figure 2. A generalized map of the Michigan copper district showing the location of new finds...Besse. arborescent copper crystal groups cached at the Central mine town site, (2) copper crystals recovered...Gull Rock fissure vein, (3) hundreds of copper from the Indiana mine, and (4) more than two hundredV aecilS...analcime/calcitecrystal groups from the Rhode Island mine. This article describes these and other finds made...starting with Keweenaw Point and continuing in a southwestern direction to the White Pine mine at the southern |
