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| 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Keweenaw Figure 1. A delicate group...Copper Country Figure 2. Generalized map of the Michigan copper district showing the location of the new...Mineral Finds in Michiganâs Copper Country T he Michigan Copper Country, also known as the Lake Superior...scenic Keweenaw Peninsula, which juts out into Lake Superior at the western end of Upper Michigan. The...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton |
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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...........................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......................................53 |
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| porcelaneous datolite nodules resembling the outer surface of cauliflower are indigenous to the Michigan Copper...copper mining era that once flourished on the Keweenaw Peninsula. 314 Figure 1. The headframe and hoist house...in 1976 for underground exploration. All of the datolite nodules recovered this past winter were found...Tom Rosemeyer is a native of Upper Michigan and a graduate of Michigan Technological University in Houghton...Houghton. He specializes in datolite and has collected the nodules for fifty years. ROCKS & MINERALS 314-319_Mesnard |
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| ........... 11 Porcelaneous Datolite of the Keweenaw Peninsula, Michigan ..............................FEBRUARY 2014 Porcelaneous Datolite of the Keweenaw Peninsula, Michigan by: Paul T. Brandes Member of...However, there is another lesser-known variety of datolite that is perhaps more rare than the crystallized...on Michiganâs Keweenaw Peninsula. The following is a brief description of what a datolite is and its mode...mode of occurrence in Michigan, what gives the datolites of Michigan their striking coloration, historical |
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| datolites recovered from the main dump. In the 1940s, datolite was so plentiful that it took very little time...âswamp aditâ and âswamp shaft.â Most of the main datolite-producing dump material was hauled off years ago...favorite site for collecting microcrystals in the Keweenaw. The crystals occur in small vugs in prehnitequartz...crystallized quartz and prehnite. Complex crystals of datolite along with apophyllite can also be found. A number...âClearly this is the finest malachite known from Michigan.â Chalcocite has also been found as microcrystals |
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| Eveleth, Minnesota 55734 efo.england@gmail.com Datolite Nodules from Minnesota A New Find On 13 April...Superior, Wisconsin, made an extraordinary find of datolite nodules along the North Shore of Lake Superior...flows of the North Shore Volcanic Group (NSVG). Datolite, CaB(SiO4)(OH), crystallizes in the monoclinic...less and occurs predominately in Michigan on the Keweenaw Peninsula and Isle Royale and also on Minnesotaâs...bachelorâs degree in geological engineering from Michigan Technological University (1981) and a masterâs |
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| Michiganâs Keweenaw Peninsula TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...pumpellyite, and laumontite. Analcime, barite, datolite, apophyllite , natrolite, and microcline (variety...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton...This was in October 1962 when I and two other Michigan Tech students were collecting in the underground...spend about six snow-free months living in the Keweenaw. I do a lot of collecting during the time Iâm |
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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...scenic Keweenaw Peninsula that juts out into Lake Superior near the western end of Upper Michigan. The...The Keweenaw winters can be long and cold with lake-effect snow accumulations of 200â300 inches not uncommon |
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| MICROMOUNTING AT THE KEWEENAW PENINSULA, MICHIGAN By PAUL B. MOORE and RICHARD M. 6EGER Depr. of Geolophysical...INTRODUCTION The Keweenaw Feninsula is well-known for its fine specimens of copper, datolite, calcite xls...minerals are the best found anywhere in the Keweenaw Peninsula. PUMPELLYITE (6Ca0.3Al 2 0 3 .7Si0 2 .4 H...amounts in nearly every other mine throughout the Peninsula. ROCKS AND MINERALS Downloaded by [JAMES COOK...good xls; forming the base for natrolite xls at Keweenaw Point in soft amygdaloidal basalt; Kearsarge Mine |
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| discovered in 1844, is located on the Keweenaw Peninsula of Upper Michigan in the heart of the "Copper Country...mining operation and made it the first mine on the "Keweenaw" to pay dividends to stockholders. Throughout... N ative copper was first mined on the Keweenaw Peninsula several thousand years ago by Native Americans...three mineral tracts on the northern part of Keweenaw Peninsula. After examining the copper prospect near...saying that Tom Rosemeyer, a native of Upper Michigan, started his mining career with Calumet and Hecla |
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| Besse. 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net An UNUSUAL Glacial Silver...Silver Find In Michiganâs Keweenaw Peninsula Twenty-third in a series of articles on the mines and minerals...formed to where they would ultimately be found. In Michigan this took place during multiple periods of continental...continental glaciation that the Keweenaw Peninsula experienced over the past 2 million years. The copper...masses of float copper have been found in the Keweenaw Peninsula dating back thousands of years to the Paleo |
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| an Exceptional Silver Vein in Michiganâs Keweenaw Peninsula TOM ROSEMEYER Figure 1. The best silver/copper...2017). 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Twenty-sixth in a series of...vein located in Keweenaw County, Michigan, was made by Doug Miller of Calumet, Michigan. Miller, a thirty-year...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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| ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Up Twenty-first in a series...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 researching...scenic shoreline of Lake Superior at Esery Park, Keweenaw County. Larry Maltby photo (July 2013). Figure...with the location of the agates recovered off Keweenaw Point in Lake Superior; prepared by William Besse |
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| ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Unearthed from a Pleistocene...Pleistocene Grave In Michiganâs Keweenaw Peninsula Twenty-fourth in a series of articles on the mines and minerals...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...ADELAIDE LIBRARIES] at 21:19 11 October 2017 Peninsula once again. The outcrop of the Calumet and Hecla |
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| Copper-bearing Amygdaloidal Lode Houghton and Keweenaw Counties, Michigan TOM ROSEMEYER PO Box 369, 506 Pine Street...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...the A. E. Seaman Mineral Museum on the campus of Michigan Technological University will let you relive the...Tom Rosemeyer is a native of Upper Michigan and a graduate of Michigan Technological University in Houghton |
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| February 2015 Figure 2. A generalized map of the Michigan copper district showing the location of new finds...localities are arranged geographically, starting with Keweenaw Point and continuing in a southwestern direction...end of the district. Keweenaw Point, Keweenaw County The waters off Keweenaw Point have drawn much attention...first âNews from the Keweenawâ article that described the occurrence of yellow datolite at the bottom of...divers who were scouring the bottom of the lake for datolite nodules and agates-it resembled a frogmen scene |
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| Houghton and Keweenaw Counties, Michigan TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...and Hecla Conglomerate in Houghton and Keweenaw counties, Michigan. Every summer in the Copper Country,...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton...565 I now spend six months of the year in the Keweenaw collecting minerals, doing research, and exploring...inches thick. However, at the Central mine in Keweenaw County the bed widens to 24â36 inches thick and |
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| George Robinson, Michigan Technological University. neW DATA On MIneRALs fROM THe KeWeenAW cOPPeR DIsTRIcT...material from several former mines on the Keweenaw Peninsula, Michigan, has revealed the presence of several...occurrence of anilite (Cu7S4) near Painesdale, Michigan (Heinrich and Robinson 2004), carbonate matrix...stromeyerite and is the first report of this mineral for Michigan. It has been suggested that alteration of silver-bearing...1.2 mm, from the Baltic mine, Houghton county, Michigan. Dan Behnke specimen and photomicrograph. Figure |
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| ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net All mineral photography by...Mineralogy of the St. Louis Mine Houghton County, Michigan Twentieth in a series of articles on the mines...about 1.3 miles east of the village of Laurium, Michigan. This little-known locality is seldom visited...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University, He now...Lake Superior copper district in Houghton and Keweenaw counties. The copper-bearing Portage Lake Volcanics |
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| of native copper in the Quincy mine ca. 1918. (Michigan Technological University Archives, Houghton) ...Donald Pearce (1941-1989) The âCopper Kingâ 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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| News from the Keweenaw Downloaded by [Florida State University] at 18:43 12 November 2014 Part 3âRecent...years have passed since the last âNews from the Keweenawâ; this article updates new finds to the spring...Tom Rosemeyer is a native of Upper Michigan and a graduate of Michigan Technological University in Houghton...construction in the Keweenaw. However, extensive logging operations, primarily in Keweenaw County, have increased...Copper District Figure 3. A generalized map of the Michigan copper district showing the location of new mineral |
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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...stoneâis 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...period limestone in the northernmost Lower Peninsula counties of Charlevoix, Presque Isle, Emmet, Cheboygan |
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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. Michiganâs Copper Country datolite has been collected, prized, fashioned, and proudly...of the Keweenaw Peninsulaâs datolite by diving into this article on the occurrence of datolite and the...never-before-published collecting history of major datolite localities and collecting personalities. Stanley |
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| Ina Man Ca6 Calumet and Heclo mine, Calumet, Michigan. Scrlnwib8w on drtditr, 3.24" x 6", SUSAN ROBINSON...MichiQon49930 I f you travel to Michigan's Keweenaw peninsula, you are in the heart of "Copper Country...specimens 80 uaed are the Copper Country's unique datolite nodules, which are usually cut in half and polished...etching or scrimshaw. Ons artist who utilizes datolite for this type of work is James Billings of Copper...Copper Harbor, a village at the terminus of tbe Keweenaw. Billings, whose interest in carving began at |
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| 08 January 2015 The Occurrence of Porcelaneous Datolite in MichiganĂs Lake Superior Copper District Figure...Figure 1. A rare and beautiful yellow datolite nodule, 0.9 x 1.1 inches, recovered from the Hancock mine...the bowels of a Keweenaw copper mine to the icy depths of Lake Superior, serious datolite collectors have...steep 2,000-foot-deep mine shaft in the dead of a Keweenaw winter with only mud and ice for footholds while...and Sciences Michigan Technological University Tom Rosemeyer is a native of Upper Michigan and a graduate |
Drexel Mine, Eagle Harbor, Keweenaw County, Michigan, USA