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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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| 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...of the Keweenaw Peninsula’s 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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| February 2015 Figure 2. A generalized map of the Michigan copper district showing the location of new finds...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 “News from the Keweenaw” 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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| minerals of Michigan’s Copper Country News from the Keweenaw Recent Mineral Finds in Michigan’s Copper Country... When one thinks of superb specimens from the Keweenaw, memories of arborescent groups of copper and...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...with the closure of the Champion mine in Houghton County by the Copper Range Company in September 1967, |
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| News from the Keweenaw Downloaded by [Florida State University] at 18:43 12 November 2014 Part 3—Recent...the Sunset Bay Campground, located near Fivemile Point. The gravel bars along the shoreline shift with...years have passed since the last “News from the Keweenaw”; 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 |
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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...shoreline of Lake Superior at Esery Park, Keweenaw County. Larry Maltby photo (July 2013). Figure 3...with the location of the agates recovered off Keweenaw Point in Lake Superior; prepared by William Besse |
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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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| 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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| datolites recovered from the main dump. In the 1940s, datolite was so plentiful that it took very little time...“swamp adit” and “swamp shaft.” 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...cuprite, langite, malachite, and posnjakite. Point Prospect The Point prospect, located about 6 miles southeast |
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| o t- avv of Point PrOlitleEt - K EWEENAW I - COUNTY, -~ __ -- ---K--- MICHIGAN Tom Rosemcyer...decaie in the Upper tip of the Keweenaw Peninsula Peninsula. in northern Michigan. The vein History outcrop...outcrop, known locally as Point prospect, is located approximately 6 miles southeast The fissure vein that...(ltfi). A close-up view of the flssure vein at Point pmpect showing copper crystals in the siUcilled...the two best large copper groups recovered from Point prospect. hj?: John Rascona holds an 11.4-cm group |
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| ........... 11 Porcelaneous Datolite of the Keweenaw Peninsula, Michigan ..............................the editor. Editor: Phyllis B. George 22407 Park Point Drive Katy, TX 77450-5852 Phone: (281) 395-3087...Dakota, we noticed a sign saying, “Join us at our County Fair.” We thought it would be a good way to walk...small affair that had the normal displays that all County Fairs have, but they had a few things that were...FEBRUARY 2014 Porcelaneous Datolite of the Keweenaw Peninsula, Michigan by: Paul T. Brandes Member of |
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| bottom of Lake Superior near Eagle Harbor, Keweenaw County, Michigan. The near-shore find, now called the Laker...9,000–15,000 feet, and form the “spine” of the Keweenaw Peninsula. Interbedded with the basalt flows are...and Lankton 2006). In the central portion of the Keweenaw Peninsula the strike of the PLV changes from northeast...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University. He now...August 2008, Barron and Peterson left Calumet, Michigan, with Peterson’s 23-foot cabin cruiser in tow |
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| Clarence J. Monette 942 Ninth Street Lake Linden, Michigan, 49945 All Rights Reserved ISBN: 0-942363-04-3...Printing & Graphic Services, Inc. of Calumet, Michigan _ ee AUTHOR'S As the title of this. NOTE...places in the four counties of Baraga, Houghton Keweenaw and Ontonagon are listed, as this is but a small...Monette Abbaye -------------------7--7 Adams. Township .---~------7--------Agate Harbor ----------77...testte iG r rr -7 ---------cr Assinins Astor Point -------------7-7-777 Mine Atlantic -------------7--- |
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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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| 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...chlorite minerals are the best found anywhere in the Keweenaw Peninsula. PUMPELLYITE (6Ca0.3Al 2 0 3 .7Si0 2...xls; forming the base for natrolite xls at Keweenaw Point in soft amygdaloidal basalt; Kearsarge Mine...dump. In groups of xls, often diverging from a point upon quartz terminations; with plates of colorless |
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| 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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| 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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| 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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| 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 |
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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...the newly discovered native copper deposits of Keweenaw peninsula of a "peculiar reddish variety of orthoclase"...development in small amounts "in all the mines from Keweenaw Point to Ontonagon" in association with analcite...is aware of only two such localities outside of Michigan from which secondary feldspar is reported. A "pink |
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| 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...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |
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| 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...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |
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| stratigraphic succession in the Iron River district of Michigan from the Brule river northward consists of finegrained...Allen, "The Iron River Iron-bearing District of Michigan," Mich. Geol. and Biol. Surv., 1910, 144 pp.,...finds that the waters from the deep levels of Michigan iron mines are high in sulphates and chlorides...and A. E. Seaman2 divide the pre-Ordovician of Michigan into Keewatin, Huronian, and Cambrian or Primordial...Lane3 recognizes the following groups of Upper Michigan Keweenawan rocks from the base upward: (i) Bohemian |
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| Extent and General Nature of the Keweenaw Series Lithology of the Keweenaw Series Section I. Basic Original...III. Summary View of the Original Rocks of the Keweenaw Series Section IV. Detrital Rocks Chapter IV....Features of the Three Classes of Rocks of the Keweenaw Chapter Chapter II. 24 III. 34 '. 35 91... General Stratigraphy of the Keweenaw Series Chapter VI.— The Keweenaw an Rocks op the South Shore of...Lake Superior Introductory 152 Section I.— Keweenaw Point Section II.— The Region between Portage Lake |
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| Lake Superior after the famous Lake Trout off Keweenaw Point. We not only connected with seven nice trout...and poked over the local mine dumps looking for Datolite. W e found several very good specimens of Conglomerate...Conglomerate and Native Copper, but no Datolite. I also found a piece of glass which had taken on a beautiful...Ahmeek, so I paid Mrs. Luoma a short visit at the Keweenaw Agate Shop. She has a large stock of Agates and...see him this year but 259 the wet weather in Michigan changed my mind. Oh, and by the way, the day after |
Keweenaw Point, Grant Township, Keweenaw County, Michigan, USA