 | 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) | | mines and minerals of Michiganâs Copper Country flep)LOSO ofrhe Copper Range Company, White Pine, Michrgm...western part of Ontonagon County, Michigan. The area is accessible by Michigan Highway 64, which winds...above Lake Superior. The mine lies within a belt of copper-bearing Precambrian rocks that extends from Mellen...the Keweenaw Peninsula, a distance of 160 miles. The White Pine sediment-hosted stratiform copper deposit...that contain the world-famous native-copper deposits of the Keweenaw Peninsula. The main ore mineral in |  | | 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) | | 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 ROSEMEYER...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 |  | Fedorchuk, Nicholas D., Dornbos, Stephen Q., Corsetti, Frank A., Isbell, John L., Petryshyn, Victoria A., Bowles, Julie A., Wilmeth, Dylan T. (2016) Early non-marine life: Evaluating the biogenicity of Mesoproterozoic fluvial-lacustrine stromatolites. Precambrian Research, 275. 105-118 doi:10.1016/j.precamres.2016.01.015 | Journal (article/letter/editorial) | | journal pertain. 1 Highlights 2 x Copper Harbor Conglomerate contains biogenic and abiogenic stromatolites...microbes and their 6 environments. ip t 5 x Copper Harbor stromatolites provide insight into early non-marine...Milwaukee, WI 53211, USA Geology Department, Milwaukee Public Museum, Milwaukee, WI 53232, USA c Department of...University of Southern California, Los Angeles, CA 90089, USA d Department of Earth, Planetary, and Space Sciences...California, Los Angeles, Los Angeles, CA 90095, USA M an Corresponding author. E-mail address: fedorch2@uwm |  | | Journal (article/letter/editorial) | | exposed by acid dissolution from the late-stage calcite matrix. The group is 4 mm long with individual...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 |  | | 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 |  | | Book | | 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 Š 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 |  | | Journal (article/letter/editorial) | | Mesoproterozoic Nonesuch Formation, northern Wisconsin, USA Esther Kingsbury Stewart, Jeffrey L. Mauk PII: DOI:...Mesoproterozoic Nonesuch Formation, northern Wisconsin, USA, Precambrian Research (2017), doi: http://dx.doi...Mesoproterozoic Nonesuch Formation, northern Wisconsin, USA Esther Kingsbury Stewartâ 1 and Jeffrey L. Mauk2 â Corresponding...fluvial-alluvial facies association (upper Copper Harbor Conglomerate) is overlain across a transgressive surface...observations of core and outcrop in Wisconsin and Michigan. Cumming et al. (2013) also favor a lacustrine |  | | 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. |  | | 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 |  | | 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 ďŹow sedimentary rocks from the Keweenaw Peninsula (Michigan, USA) are geochemically characterized to...Volcanics, coarseness and source-varied Copper Harbor Conglomerate, and the quartz-rich post-rift ďŹll unit...lithologically-varied range of localities across the Keweenaw Peninsula, Michigan. Provenance indicators such as Ti/Zr |  | | 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 |  | | Journal (article/letter/editorial) | | PENINSULA OF MICHIGAN J. KALLIOKOSKI Department of Geology and Geological Engineering, Michigan Technological...sedimentary rocks (~ 1.1 Ga), upper Peninsula of Michigan. Precambrian Ras., 32 : 243--259. A complex caliche...caliche such as carbonate-rimmed pebbles, pendulose calcite on pebbles, sand grains floating in a carbonate...by numerous superimposed horizons of mud-chip conglomerate, enormous, previously cemented mudstone rip-ups;...Keweenawan red-bed strata in the Upper Peninsula of Michigan (Fig. 1),' along a strike length of 250 km (150 |  | | Report (volume) | | 64-66 Supt.of Docs. No.: 119.3:1309 1. Geology-Michigan-Isle Royale National Park-Guide-books. I. Title...Lake Volcanics ______ Rock Harbor-Tobin Harbor area __________ Washington Harbor area_______________ An ancient...ancient alluvial fan the Copper Harbor Conglomerate ________ Tilting and breaking the rocks _____________...minerals of special interest ____________ Native copper widespread but not abundant ____ Chlorastrolite...activities of man in the Lake Superior region. Native copper implements, weapons, and ornaments have been found |  | | 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...heterogenous unit of intercalated red bed units of conglomerate, sandstone, siltstone, and shale; black shale;...west, there is no conglomerate unit to correlate with the Copper Harbor Conglomerate. Other key boreholes...1355 Jefferson Forest Lane, Blacksburg, VA 24060, USA. 0037-0738/02/$ - see front matter D 2002 Published |  | Jones, S.M., Prave, A.R., Raub, T.D., Cloutier, J., StĂźeken, E.E., Rose, C.V., Linnekogel, S., Nazarov, K. (2020) A marine origin for the late Mesoproterozoic Copper Harbor and Nonesuch Formations of the Midcontinent Rift of Laurentia. Precambrian Research, 336. 105510 doi:10.1016/j.precamres.2019.105510 | Journal (article/letter/editorial) | | marine origin for the late Mesoproterozoic Copper Harbor and Nonesuch Formations of the Midcontinent...Supergroup Copper Harbor Formation Nonesuch Formation Lacustrine Mesoproterozoic The c. 1.1 Ga Copper Harbor...leads to the conclusion that parts of the upper Copper Harbor Formation and the entirety of the Nonesuch Formation...pseudomorphs after gypsum in the upper 200 m of the Copper Harbor Formation and in numerous stratigraphic positions...oxygenation that rely on the Nonesuch Formation and Copper Harbor stromatolites having been deposited within a |  | | Journal (article/letter/editorial) | | articles on the mines and minerals of Michigan's Copper Country Rocks & Minerals 2001.76:156-188. Tom...I , < h,,,rl,rp,, ,,I I r,,,,l>,l\ T HE MICHIGAN COPPER DISTRICT stretches in a southwest-northeast...White Pine mine in Ontonagon County to Copper Harbor in Keweenaw County. Copper mineralization occurs in...White Pine mine and (2) the world-class native copper deposits that occur in the Portage Lake Volcanics...Volcanics (PLV) and the Copper Harbor Conglomerate. The native-copper deposits can be further divided into |  | | 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) | | 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...Wisconsin northeastward throughout the Keweenaw Peninsula in Michigan, and on Isle Royale in Lake Superior...Superior. Copper Harbor Conglomerate The Copper Harbor Conglomerate (Daniels, 1982) is a distinct rock type...sandstone (Daniels, 1982). A clast-supported conglomerate facies is common in the lower part of the formation |  | | Journal (article/letter/editorial) | | Figure 51. A classic calcite that is attributed to the Owl Creek fissure of the Copper Falls mine, this complex...crystal is perched on a matrix of crystallized copper. The specimen was originally part of the Clarence...Figure 49. Perhaps the finest cubic copper crystal recovered in the Copper Country in recent times. The 1...level of the Gribble vein in the Copper Falls mine. Of all the copper specimens recovered from the clay...Figure 50. One of the finest calcite crystals recovered from the Copper Falls mine in the early days |  | | 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) | | crystallized copper was made in shallow water on the bottom of Lake Superior near Eagle Harbor, Keweenaw County...County, Michigan. The near-shore find, now called the Laker Pocket, was located in a fissure vein cutting...pocket netted more than three hundred groups of copper crystals ranging in size from large-cabinet specimens...of the Keweenaw Peninsula. Interbedded with the basalt flows are twenty-two major conglomerate and sandstone...base of this sequence is the fluvial Copper Harbor Conglomerate that ranges from 200 to 7,000 feet in |  | | 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 |  | | 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 |
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