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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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| 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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| "KEWEENAW—COPPER COUNTRY By JOE ROTHSTEIN 255 West 84th Street, New York 24, N. Y. Keweenaw! in the...Bridge. In all the mitted. Inquiries to clubs in Michigan rugged beauty that makes up Michigan's were not...paradise and Copper Harbor at the very tip of even when they speak of the harshness Keweenaw where Brockway...mountains of northern "Where?", and she said, "Michigan," Pennsylvania, stopping off to see the deep and...from a mineralogical and collecting standpoint, Michigan belonged on the map. W e next turned the nose |
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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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| The Clark mine, about 2 miles southeast of Copper Harbor, developed a fissure vein that strikes N. 8° W...favorite site for collecting microcrystals in the Keweenaw. The crystals occur in small vugs in prehnitequartz...that occur perched on crystallized quartz and prehnite. Complex crystals of datolite along with apophyllite...prospect, located about 6 miles southeast of Copper Harbor, has produced some of the largest copper crystals...fissure vein that strikes N. 10° E. Quartz and prehnite are the main gangue minerals in the 1.5-foot-wide |
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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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| Lakes States Wisconsin, Indiana, Illinois, Michigan, by June Culp Zeitner $5.95 Gem Guides Book... and Michigan. Dow Chemical has reported finding diamonds in the kimberlites of upper Michigan, and vast...shoreline on both Lake Superior and Lake Michigan. Michigan is the state with the most shoreline on these...fresh water seas, with waters of Lake Superior, Michigan and Huron virtually surrounding it. Illinois and...and Indiana are bordered in part by Lake Michigan, and Ohio hugs the edge of Lake Erie. These states |
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| of the Keweenawan Tholeiitic Lavas of Northern Michigan, U.S.A. by WAYNE T. JOLLY1 and RAYMOND E. SMITH...1971) INTRODUCTION T H E Keweenaw Peninsula of the Superior region, Michigan, contains one of the classic...Portage Lake Lava Series of the Keweenaw Peninsula, northern Michigan, is composed of over 5000 m of tholeiitic...characterized by metamorphic assemblages of the prehnite-pumpellyite facies. Within the higher rank facies...sampling restriction netic m nation | Eagle Harbor__ -A Copper Harbor Jacobsville Fm (sandstone) - » I |
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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...since the publication of the first “News from the Keweenaw” article that described the occurrence of yellow... To date, he has discovered two areas between Keweenaw Point and Manitou Island where datolite occurs |
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| Lode Houghton County, Michigan TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...copper-bearing amygdaloidal lode in Houghton County, Michigan. These unusual agates, which range in size...Lake Superior copper district in Houghton and Keweenaw counties. The copper-bearing Portage Lake Volcanics...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University. He now...Geology The Keweenaw Peninsula, which juts out into Lake Superior at the western end of Upper Michigan, is located |
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| SURVEY Certain geologic characteristics of the Michigan copper district can provide exploration guides... Geologic features common to younger lavas of Michigan and Wisconsin ._________ _ _ Shows of native copper...metamorphic minerals, Portage Lake Volcanics, Eagle Harbor section _______ 5 Diagram showing hypothetical...large deposits, comparable to those of northern Michigan, are present, they are more likely to be found...mineralization of the classic native-copper district of Michigan could be helpful in suggesting that certain covered |
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| (CaBSiO4OH) vesicle filling from a basaltic Houghton County lava flow. Small specks of native copper occur...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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| mobilizedduring prehnite-pumpellyite faciesmetamorphism in the Keweenawanbasaltsof northern Michigan. Cu, averaging...introducedinto hydratedrocks where pumpellyite,prehnite,laumontite, and chloriteare the principalhydroussecondaryphases...has been producedby a century of mining in the Keweenaw Peninsula. The data suggestthat enrichmentor depletion...vicinity of such zones was altered to the zeoliteand prehnite-pumpellyite facies (Stoiber albite basalts. The...suchmaterial exposedin the KeweenawPeninsula,albite,prehnite, was devitrified and chloritized, presumablyby |
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| PUBLISHED MONTHLY 1938 CONTENTS FOR MAY, 1938 PREHNITE • • • • • • • • • • • • • • • ...131 PREHNITE One of the loveliest of green minerals which always excites admiration is prehnite. It must...green, as prehnite is also found in a gray, white, yellowish and even a bluish color. Prehnite is an old...found it at Cape of Good Hope in South Africa. Prehnite is now a common mineral at many localities. Very...asbestos. In the United States an early locality for prehnite was near Farmington, about 10 miles west of Hartford |
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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...of Lake Superior Introductory 152 Section I.— Keweenaw Point Section II.— The Region between Portage |
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| Avenue, Pontiac, Michigan It was at one of last winter's meetings of the Michigan Mineralogical Society...six-day invasion of Marquette, Baraga, Houghton and Keweenaw Counties. The response almost bowled us over so...six days which we had scheduled for Ishpeming, Michigan. Bob Markert and his associates came through in...Upper Peninsula Development Bureau of Michigan, Marquette, Michigan, and were well supplied with information...arrangements with the Michigan College of Mining and Technology at Houghton, Michigan, for a joint field |
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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 Michigan’s 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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| Park 13700 13.25 Lane Garden, Michigan 49835 Tel: (906) 644-2603 Keweenaw Peninsula Jill Barbour (jnbarbour@mtu...Department of Geological Sciences & Engineering Michigan Technological University 1400 Townsend Dr., Houghton...Rocks National Lakeshore P.O. Box 40, Munising, Michigan 49862 Tel: (906) 387-2607 / Email: David_Kronk@nps...Mining Engineering and Sciences (adjunct) Northern Michigan University Marquette, MI 49855 Tel: (906) 227-1176...Porritt, Dept of Geological Sciences & Engineering, Michigan Technological University Michelle Miller, Center |
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| and priced at $3.00 each. B APOPHYLLITE -- & PREHNITE: Bombay and Poona, India: Fine quality miniatures...AURICHALCITE - BISBEE: Southwest Mine, Cochise County, Bisbee, Arizona: Exceptional baby blue to deep...AURICHALCITE - 79 MINE: 79 Mine, Banner District, Gila County, Arizona: Delicate radiating acicular and lathlike...Morenci Mine, Clifton-Morenci District, Greenlee County, Arizona: Excellent specimens of this great deep...supply. CALCITE - BISBEE: Southwest Mine, Cochise County, Bisbee, Arizona: AWESOME! Exquisite masses of |
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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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| priced at $3.00 each silvery M.§ENOPYRITE: Wine Harbor, Nova Scotia, Canada: from a for�er gold �ine,...last! WHITEPINEMINECRYSTALLINECOPPER: Ontonogan, Michigan. A summer acquisition purchase d from the Seaman...from the last operating commercial copper mine in Michigan! Priced at $3.00, $6.00, $10.00, and $15.00 depending..."HALFBREEOS'� Calumet and Hecia Mine, LalMichigan: Col!ected back in the 1960's these are tumble...00. CRYSTALLINE CUPRITE: Ray Central Mine, Pinal County, Arizona: Excellent small crystalline specimens |
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| Copper Country Ellis W. Courter Contribution to Michigan Geology 92 01 Table of Contents Preface ............................................... 2 The Keweenaw Peninsula ......................................geology and history of the copper deposits of Michigan. Every effort has been made to present accurate...necessarily reflect the policies or practices of the Michigan Department of Natural Resources, Geological Survey...Nonetheless, he was very well known by hobbyists in Michigan and surrounding areas. The National Rockhound |
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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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| Geological Engineering, Geology and Geophysics, Michigan Technological University, Houghton, MI 4993 1...from the Portage Lake Volcanics (PLV) in northern Michigan have initial Nd and Sr isotopic compositions which...Kansas as well as to the southeast beneath the Michigan basin (VAN SCHMUS and HINZE. 1985). The PLV is... 1968; GREEN, 1982). In the Keweenaw Peninsula of northwestern Michigan (Fig. I), the PLV attains a thickness...copper Harbor Cgl I Portage Lake Volcanics FIG. 1. Generalized geologic map of the Eagle Harbor Section |
