 | | Journal (article/letter/editorial) | | 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 |  | | Journal (article/letter/editorial) | | 2015 Figure 2. A generalized map of the Michigan copper district showing the location of new finds mentioned...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 |  | | Journal (article/letter/editorial) | | Michigan’s Copper Country News from the Keweenaw Recent Mineral Finds in Michigan’s Copper Country Downloaded...A l t h o u g h commercial copper mining has come to an end in the Copper Country, specimens reminiscent...heyday of mining are still being recovered. When one thinks of superb specimens from the Keweenaw, memories...groups of copper and silver crystals, colorful porcelaneous nodules of datolite, and copper inclusions...courtesy Michigan Technological University Archives and Copper Country Historical Collections, Michigan Technological |  | | Journal (article/letter/editorial) | | exceptional group of copper crystals recovered from a large vug in the fissure vein of the Cliff mine; the largest...Probably the best arborescent silver from the Cliff mine, this specimen is 9.5 × 10.5 cm and was originally...calcite from the Cliff mine is 3.6 cm long and perched on a matrix of spongy copper. It was originally in...on earth (Bornhorst and Rose 1994). At the Cliff mine it thickens to more than 1,300 feet and remains...the formation of tabular deposits of fissure vein copper in the thin underlying lava flows. Mineralization |  | | Journal (article/letter/editorial) | | 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 |  | | Journal (article/letter/editorial) | | 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...of Michigan’s Copper Country Figure 2. Generalized map of the Michigan copper district showing the location...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 |  | | 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...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................................... |  | | Journal (issue) | | 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. |  | | Book (volume) | | Most specimen collecting is done in the Lead-Zinc mining dists. of northwestern Illinois, the glacial drift...600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip mine⎯pyritized gastropods |  | | Book (volume) | | Most specimen collecting is done in the Lead-Zinc mining dists. of northwestern Illinois, the glacial drift...600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip mine⎯pyritized gastropods |  | | Journal (article/letter/editorial) | | 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 |  | | Book (volume) | | Dahlonega Co. and Rabum Co., and the McDuffie County Belt extending through portions of McDuffie, Warren...Sphalerite. BALDWIN COUNTY MILLEDGEVILLE, at state farmjasper. BANKS COUNTY COMMERCE, along Hwy. 59...along adjoining Co. linerock crystal. BARROW COUNTY WINDER, along rd. to Jefferson and 1½ mi. inside...Guide for Rock Hounds in the United States BARTOW COUNTY AREA, Saltpeter Cave, as floatjasper. CARTERSVILLE:...agate, (banded, various colors), jasper. BIBB COUNTY MACON: at Holton Quarry, 7½ mi. NWagate; N |  | | Journal (article/letter/editorial) | | Pewabic Copper-bearing Amygdaloidal Lode Houghton County, Michigan Lake Superior Native Copper District...Michigan’s Copper Country TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter... he Lake Superior native copper district, also known as the Michigan Copper Country, is located on the...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 200–300 inches not uncommon |  | | Journal (article/letter/editorial) | | on the Hopefield site about 60 miles northwest of Cape Town, South Africa, have discovered the fossil remains...Africa Government Information Office July 18, 1957 MICHIGAN VACATION - 1956 People, Places and Prospects Lawrence...Springfield, Mass. Anyone for copper? After a hundred years of mining activity and mineral collecting...collecting, the Upper Peninsula of Michigan is still a profitable and beautiful objective for the collector, photographer...photographer or open-air vacationer. Hundreds of mine dumps, miles of agate beaches, increasing numbers |  | | Journal (issue) | | 132 A MINERALOGICAL TRIP THROUGH THE M ICH IGAN COPPER COUNTRY. By Kiril Spi roff . . . . . . . . . ...... . . . . .. . ......... . .. . .. 144 ANCIENT MINE SAVED GREEK CIVI L I ZATION . ............... 147...by Werner, after Col. Prehn who first found it at Cape of Good Hope in South Africa. Prehnite is now a...in the copper region of Keweenaw Peninsula, Mich., where is occurs in veins with native copper. Quite...often prehnite may inc!ude strings or grains of the copper and even silver. Prehnite also occurs in crystalline |  | | Journal (article/letter/editorial) | | heulandite, laumontite, natrolite, pectolite, prehnite, datolite, apophyllite, chabazite, and, occasionally, sulfides...pale green datolite are recorded from the railroad tunnels through Bergen Hill, Bergen County, and similar...Weehawken areas and quarries at Snake Hill, Hudson County. Exceptional analcime specimens have been collected...collected from many localities in Passaic County, such as quarries at Paterson and West Paterson (including...Montclair and Verona in Essex County, the Houdaille quarry at Summit in Union County, and quarries near Millington |  | | Book | | variety, etc. T Tsumeb (vol. 8, no. 3) M y Michigan Copper Country (vol. 23, no. 2) Co. Company G ...five book-format issues (8/#3, Tsumeb; 23/#2, Michigan Copper Country; 23/#4, Yukon Phosphates; 24/#2, Greenland;...I 1991 337--424 273-336 [ 1-128 129-208 [ COPPER] [ 177-256 185-280 169-248 [ 425-528 337--400...the FM-TGMS-MSA Symposium on Azurite and other copper carbonates (chairman: K. Wenrich) 22:65-69 [Abstracts...Adelaide mine, Dundas, Tasmania (by A. H. Chapman) 3:111-113 ADOLFSSON, STIG G. Hrucopper and cobalt |  | | Journal (issue) | | scepter with pyrite, 7 cm, from Spruce Ridge, King County, Washington; Rick Dillhoff collection; Jeff Scovil...Acanthite with silver, 2.6 cm, from the Uchucchacua mine, Peru; Allan Young collection and photo. Amethyst...prospectors. All of this activity gave a jump-start to mining interests and prospecting in the lands of the Pacific...beautiful quartz specimens from Denny Mountain and King County, Washington, and the zeolites from the coastal...Alaska, ca. 1906. She organized her own company to mine the garnets, and may have distributed thousands |  | | Journal (article/letter/editorial) | | California at the Natural History Museum of Los Angeles County the weekend of 13 and 14 December. Formerly known...in Houghton, Michigan, recently completed the Keweenaw Gallery portion of its Michigan Minerals exhibits...interpreting the area’s mining history and geology and displaying the Copper Country’s finest mineral...Gemological Institute of some of the best datolite, copper, silver, America (GIA), in Carlsbad, California...unveiled a new exhibit of organic gems region’s mine, as well as exhibits of Lake that will run through |  | | Book | | volume is dedicated is four-fold: (1) To locate by mine, deposit, or community those mineralized areas of...Co. Hematite CALERA, Shelby Co. Wavkllite CLAY COUNTY, Sec. 24. T. 19 S R., 7 E. STATUARY, Coosa Co...Co., (W. border of* Marble Crystalline TALLADEGA COUNTY Marble, (crystalline) VALLEY HEAD, DeKalb Co. Hematite...Hematite VILLAGE SPRINGS, Blount Co. Hematite WOODS COPPER MINE, Cloaburne Co. Sphalerite ARIZONA COVEI.I.ITE...Feldspar HISSOP, Coosa Co., (near) Beryl JACKSON COUNTY Hematite KENNEDYS, Clay Co., (near) Magnetite MILLERVILLE |  | | Report (volume) | | ....................................... 102 District of Columbia ....................................:............................................. Michigan.................................................to refer to Geological Survey Bulletin 507, "The mining districts of the western United States," and to...abundant it may have been completely exhausted by mining or quarrying. Deposits of minerals that are widely...especial interest or value. Some minerals, such as the copper ores of Pennsylvania, are included in the list |  | | Catalog/List | | 5x3 Edwards, Balmat-Edwards Zinc District, St Lawrence Co., New York, USA. £7 6 MOHAWKITE a burnished metallic...Algodonite, Domeykite (Cu As) and Native Copper, Keweenaw County Michigan USA 3.5x3 £20 7 DMISTEINBERGITE a fairly...crystal about 6cm long £ 10 Mono Lake, Mono County California USA 10 VOLKOVSKITE orange platy mass ,a thin...all over 4x4 surface. It's about lm thick Cassagna Mine, Ne ,Graveglia Valley, Liguria Italy, I collected...botryoidal 1cm x 8mm on 2.5xlcm Penberthy Croft Mine St Hilary Cornwall £6 - the type location 19 URBANITE |  | | Book | | assemblages have been mapped in exposed basaltic rock in County Antrim, Northern Ireland, and eastern Iceland....seawater followed faults along the eastern coast of County Antrim and was the fluid in the cavities that produced...such as apophyllite, gyrolite, okenite, prehnite, datolite, tacharanite, and clay are easily affected by...tuff deposits that can be obtained by open-pit mining. Construction Materials Silica-rich heulandite...intake of the radioactive elements by plants. Mining Silica-rich heulandite and mordenite are used to | | | Book | | assemblages have been mapped in exposed basaltic rock in County Antrim, Northern Ireland, and eastern Iceland....seawater followed faults along the eastern coast of County Antrim and was the fluid in the cavities that produced...such as apophyllite, gyrolite, okenite, prehnite, datolite, tacharanite, and clay are easily affected by...tuff deposits that can be obtained by open-pit mining. Construction Materials Silica-rich heulandite...intake of the radioactive elements by plants. Mining Silica-rich heulandite and mordenite are used to |  | | Report (volume) | | it helpful to refer to Survey Bulletin 507, "The mining districts of the western United States," and to...abundant, it may have been completely exhausted by mining or quarrying. Deposits of minerals of wide distribution...especial interest or value. Some minerals, such as the copper ores of Pennsylvania, are included in the list...because they occur in sufficient quantity to warrant mining for their usual products but because they furnish...Mathews, Johns Hopkins University, Baltimore. Michigan..........Mr. R. A. Smith, Lansing. Dr. A. C. Lane |
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Cape Mine, Mosquito Mining District, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA