 | | Book | | Mineralogy of Michigan by E. W. Heinrich updated and revised âą 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 |  | | Report (issue) | | filling from a basaltic Houghton County lava flow. Small specks of native copper occur as inclusions near the...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 |  | | Report (issue) | | 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 |  | | Journal (article/letter/editorial) | | Survey, National Center-MS 954, Reston, VA 22092, USA (Received October 10, 1990; accepted after revision...1 ) native copper deposits in basalts and interflow sediments; (2) sediment-hosted copper sulfide and...and native copper; (3) copper sulfide veins and lodes hosted by rift-related volcanic and sedimentary rocks;...hydrothermal sulfides occur (i.e., shale-hosted copper sulfides), the source of sulfur was local sedimentary...Survey, National Center--MS 954, Reston, VA 22092, USA. tinent rift system (MRS) of North America is one |  | | Journal (article/letter/editorial) | | Minnesota-Duluth, Duluth, MN, 55812, USA b University of Wisconsin-Superior, Superior, Wl, USA Accepted 20 August 2001... two deep boreholes in the Upper Peninsula of Michigan are described in detail for the first time. Both...no conglomerate unit to correlate with the Copper Harbor Conglomerate. Other key boreholes are distributed...1355 Jefferson Forest Lane, Blacksburg, VA 24060, USA. 0037-0738/02/$ - see front matter D 2002 Published...boreholes in the MRS in the Upper Peninsula of Michigan. The Amoco Production #1-29R test (St. Amour) |  | | Journal (article/letter/editorial) | | 1437â1444 GENESIS OF NATIVE COPPER LODES IN THE KEWEENAW DISTRICT, NORTHERN MICHIGAN: A HYBRID EVOLVED METEORIC... Canada H3C 3A7 Abstract The Keweenaw Peninsula of northern Michigan is well known for early diagenetic...diagenetic sulfide-dominant sediment-hosted stratiform copper mineralization hosted mainly by basal siltstone-shale...Formation in the White Pine district, and later native copper lodes hosted mainly by flow-top breccias and amygdaloidal...stratigraphically lower Portage Lake Volcanics. The native copper mineralization is generally attributed to downdip |  | | Journal (article/letter/editorial) | | 1.1 Ga Midcontinental Rift of the Keweenaw Peninsula, Michigan, USA Ria L. Mitchell a,â , Nathan D. Sheldon...of Michigan, 2534 CC Little Building, 1100 North University Avenue, Ann Arbor, MI 48109-1005, USA b ...debris ïŹow sedimentary rocks from the Keweenaw Peninsula (Michigan, USA) are geochemically characterized to...coarseness and source-varied Copper Harbor Conglomerate, and the quartz-rich post-rift ïŹll unit of the...lithologically-varied range of localities across the Keweenaw Peninsula, Michigan. Provenance indicators such as Ti/Zr |  | | Journal (article/letter/editorial) | | Sedimentary Rock-Hosted Stratiform Copper Deposit, Upper Peninsula, Michigan Theodore J. Bornhorst1,â and William...Mineral Museum, Michigan Technological University, 1404 E. Sharon Avenue, Houghton, Michigan 49931 2 Orvana...located in Gogebic County, Upper Peninsula, Michigan, within the Porcupine Mountains copper district. It was...production projected in the near future. Stratiform copper mineralization is hosted by gray to black shales...and siltstones of the basal Nonesuch Formation. Copper mineralization is overlain by laminated gray siltstones |  | | 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 âCopper Kingâ 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. |  | | Report (issue) | | BEDROCK GEOLOGY AND COPPER DEPOSITS OF THE MATCHWOOD QUADRANGLE, ONTONAGON COUNTY, MICHIGAN By Robert F. Johnson...Lake Lava Series 3 Unnamed formation 5 Copper Harbor Conglomerate 9 Nonesuch Shale 13 Jacobsville...BEDROCK GEOLOGY AND COPPER DEPOSITS OF THE MATCHWOOD QUADRANGLE, ONTONAGON COUNTY, MICHIGAN ' ~ By Robert...The Matchvood quadrangle is in central Ontonagon County, just west of the Ontonagon River and its Middle...consisting of mafic and felsic lava flows, the Copper Harbor Conglomerate, the Nonesuch Shale, and the Freda |  | | Journal (article/letter/editorial) | | Amsterdam 189 Organic matter and copper mineralization at White Pine, Michigan, U.S.A. Jeffrey L. Mauk a and...Arbor, M148109, USA bGeology Department, lndiana University, Bloomington, IN 47405, USA (Received May 21..., 1992. Organic matter and copper mineralization at White Pine, Michigan, U.S.A. In: P.A. Meyers. L.M...second-stage mineralization events at White Pine, Michigan. Samples of the Proterozoic Nonesuch Formation...Geological Sciences, University of Michigan, Ann Arbor, MI 48109, USA. "Present address: Exxon Production |  | | Journal (article/letter/editorial) | | 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...at the Gull Rock fissure vein, (3) hundreds of copper from the Indiana mine, and (4) more than two hundredV...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 |  | | Journal (article/letter/editorial) | | Calumet, Michigan 49913 tajmahal@gilanet.com History and Mineralogy of the Manganese Mine Keweenaw County...County Michigan Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University...Houghton. He now spends a good part of the year in the Copper Country researching and writing articles about...articles on the mines and minerals of Michiganâs Copper Country Downloaded by [Lakehead University] at...March 2015 L ocated in the rugged Keweenaw Peninsula of Upper Michigan are two small manganese oxide deposits |  | | Journal (issue) | | MICHIGAN COPPER! The Mineralogical Record JANUARY-FEBRUARY 2023 ? VOLUME 54 ? NUMBER 1 ? $40 ... KRISTALLE Est.1971 Laguna Beach, California, USA âą Tel: +1 949 494 5155 âą Email: info@kristalle.com...gemgypsy@bellsouth.net JANUARYâFEBRUARY 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 (article/letter/editorial) | | News from the Keweenaw Downloaded by [Florida State University] at 18:43 12 November 2014 Part 3âRecent...Michiganâs Copper Country Eleventh in a series of articles on the mines and minerals of Michiganâs Copper Country...Superior storms, exposing calcite/quartz veins in the Copper Harbor Conglomerate. Authorâs photo. TOM...minor and major, continue to be made in Michiganâs Copper Country. The May/June 1998 and the November/December...years have passed since the last âNews from the Keweenawâ; this article updates new finds to the spring |  | | Journal (article/letter/editorial) | | 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 |  | Gallagher, Timothy M., Sheldon, Nathan D., Mauk, Jeffrey L., Petersen, Sierra V., Gueneli, Nur, Brocks, Jochen J. (2017) Constraining the thermal history of the North American Midcontinent Rift System using carbonate clumped isotopes and organic thermal maturity indices. Precambrian Research, 294. 53-66 doi:10.1016/j.precamres.2017.03.022 | Journal (article/letter/editorial) | | Sciences, University of Michigan, 1100 N University Avenue, Ann Arbor, MI 48109, USA U.S. Geological Survey...Survey, P.O. Box 25046 MS 973, Denver, CO 80225, USA c Research School of Earth Sciences, Australian National...century with the discovery of native copper deposits on the Keweenaw Peninsula within the Portage Lake Volcanic...White, 1968; Ensign et al., 1968). Large-scale copper mining operations began during the 1950s at the...Seds. Freda Nonesuch Copper Harbor MRS Volcanics PLR ERF Lake Superior Keweenaw Peninsula WPM PI-2 |  | | Journal (article/letter/editorial) | | PrOlitleEt - K EWEENAW I - COUNTY, -~ __ -- ---K--- MICHIGAN Tom Rosemcyer n 1990 dodecahedra1...decaie in the Upper tip of the Keweenaw Peninsula Peninsula. in northern Michigan. The vein History outcrop...The fissure vein that is exposed in the of Copper Harbor and has produced Some glaciated outcrop, which...of the largest copper crystals found in the on the bedrock geology map of tbe Fotr Copper Country. Nearly...view of the flssure vein at Point pmpect showing copper crystals in the siUcilled prehnite veln. Photo |  | | Report (issue) | | study of surface samples E2 Oronto Group E2 Copper Harbor Conglomerate E2 Nonesuch Shale E2 Freda Sandstone...sedimentary rocks in Minnesota, Wisconsin, and Michigan were examined, sampled, and described with the...throughout the Keweenaw Peninsula in Michigan, and on Isle Royale in Lake Superior. Copper Harbor Conglomerate...Conglomerate The Copper Harbor Conglomerate (Daniels, 1982) is a distinct rock type easily recognized by its...shore of the Keweenaw Peninsula were examined, both areas that typify the Copper Harbor Conglomerate |  | | Report (volume) | | Nomenclature within the Keweenawan Supergroup of Northern Michigan Geochemistry, Petrography, and Volcanology of...Rhyolites of the Portage Lake Volcanics, Keweenaw Peninsula, Michigan U.S. GEOLOGICAL SURVEY BULLETIN 1970-A...Nomenclature within the Keweenawan Supergroup of Northern Michigan By WILLIAM F. CANNON and SUZANNE W. NICHOLSON...Rhyolites of the Portage Lake Volcanics, Keweenaw Peninsula, Michigan By SUZANNE W. NICHOLSON Chapters A and...nomenclature within the Keweenawan Supergroup of northern Michigan / by William F. Cannon and Suzanne W. Nicholson |  | | Report (issue) | | for Native Copper in Northern Wisconsin A Theoretical Basis for Exploration for Native Copper in Northern...SURVEY Certain geologic characteristics of the Michigan copper district can provide exploration guides for...to younger lavas of Michigan and Wisconsin ._________ _ _ Shows of native copper or chalcocite _____...lithology__________________ Paleohydrology of the copper deposits _______ Degree of metamorphism _____________...of lava accumulation ______ Areas favorable for copper in hypothetical lava basins _________________ Hypothetical |  | | Book | | 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 |  | | Book | | Lakes States Wisconsin, Indiana, Illinois, Michigan, by June Culp Zeitner $5.95 Gem Guides Book...which operate in many states are not as likely to grant permission to collect as the former locally owned... 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 |  | | Journal (article/letter/editorial) | | OF NATIVE COPPER LODES FROM A TECTONICALLY INDUCED THERMAL PLUME OF ORE FLUIDS ON THE KEWEENAW PENINSULA...PENINSULA, NORTHERN MICHIGAN ALEX C. BROWNâ ,* Department of Civil, Geological and Mining Eng., Ăcole Polytechnique...Quebec, Canada H3C 3A7 Abstract Economic native copper lodes in the Lake Superior district are confined...45-km-long portion of the Portage Lake Volcanics on the Keweenaw Peninsula, despite similar host rocks extending...strata may be attributed to upward thrusting on the Keweenaw fault during closure of the Midcontinent rift |  | Bodden, Thomas, Bornhorst, Theodore, BĂ©guĂ©, Florence, Deering, Chad (2022) Sources of Hydrothermal Fluids Inferred from Oxygen and Carbon Isotope Composition of Calcite, Keweenaw Peninsula Native Copper District, Michigan, USA. Minerals, 12 (4) 474 doi:10.3390/min12040474 | Journal (article/letter/editorial) | | Composition of Calcite, Keweenaw Peninsula Native Copper District, Michigan, USA Thomas J. Bodden 1 , Theodore...Composition of Calcite, Keweenaw Peninsula Native Copper District, Michigan, USA. Minerals 2022, 12, 474...Engineering and Sciences, Michigan Technological University, Houghton, MI 49931, USA; tjbodden@mtu.edu (T...Seaman Mineral Museum, Michigan Technological University, Houghton, MI 49931, USA Department of Earth Sciences...worldâs largest accumulation of native copper in Michiganâs Keweenaw Peninsula. During a regional metamo |
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Copper Harbor, Grant Township, Keweenaw County, Michigan, USA