 | | Report (issue) | | The Base of the Upper Keweenawan, Michigan and Wisconsin GEOLOGICAL SURVEY BULLETIN 1354-F The... The Base of the Upper Keweenawan, Michigan and Wisconsin By WALTER S. WHITE CONTRIBUTIONS TO STRATIGRAPHY...1354-F A proposal to adopt the top of the Copper Harbor Conglomerate as the base of the upper Keweenawan in...__________________.___ _ _ Top and bottom of the Copper Harbor Conglomerate as unconformities ________________________...Base of the Copper Harbor Conglomerate __________ _ Top of the Copper Harbor Conglomerate _____________ |  | | Journal (article/letter/editorial) | | WHITE PINE-PRESQUE ISLE STRATIFORM COPPER MINERALIZATION, NORTHERN MICHIGAN Alex C. Brownâ 13250 rue Acadie...Quebec, Canada H9A 1K9 Abstract Economic stratiform copper mineralization in the fine-grained, carbonaceous...White Pine-Presque Isle mining district, northern Michigan, has long been explained by the essentially vertical...strata from the underlying Copper Harbor Conglomerate aquifer, followed by copper precipitation mainly by...Based on that model, why do lesser amounts of total copper, measured in vertical sections, occur in coarser |  | | Report (issue) | | BEDROCK GEOLOGY AND COPPER DEPOSITS OF THE MATCHWOOD QUADRANGLE, ONTONAGON COUNTY, MICHIGAN By Robert F. Johnson...Lava Series 3 Unnamed formation 5 Copper Harbor Conglomerate 9 Nonesuch Shale 13 Jacobsville Sandstone...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 Sandstone |  | | 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...Volcanics, coarseness and source-varied Copper Harbor Conglomerate, and the quartz-rich post-rift ïŹll unit...lithologically-varied range of localities across the Keweenaw Peninsula, Michigan. Provenance indicators such as Ti/Zr |  | | 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) | | 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 |  | | 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 |  | | 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 |  | | 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) | | 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 |  | 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 |  | | Report (issue) | | Flows of the Portage Lake Lava Series below conglomerate No. 14 near E:earsarge, Mich_____________ 4...Portage Lake Lava Series between conglomerate No. 14 and conglomerate No. 15 near Kearsarge, Mich____...Flows of the Portage Lake Lava Series above conglomerate No. 15 near Kearsarge, Mich_ _ _ _ _ _ _ _ _...flows near Grand Portage, Minn., gabbro in Cook County, Minn., sedimentary rocks of the Sibley Series...group includes the Portage Lake Lava Series on the Keweenaw Peninsula and most of the North Shore Volcanic |  | 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 |  | | 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) | | 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...exposing calcite/quartz veins in the Copper Harbor Conglomerate. Authorâs photo. TOM ROSEMEYER 506 Pine...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) | | stratiform copper mineralization in the White Pine-Presque Isle District, northern Michigan Alex C. Brown...curious occurrence of copper-rich early diagenetic sediment-hosted stratiform copper mineralization in the...finest-grained facies of Nonesuch greybeds in northern Michigan has been previously attributed to the warming...of cupriferous brines in the footwall Copper Harbor Conglomerate by latent volcanic heat from the subjacent...Sediment-hosted copper . Anomalous sulfide zoning . Latent volcanic heat . White Pine, Michigan Introduction |  | | 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 |  | | Report (issue) | | VOLCANICS (MIDDLE KEWEENAWAN) ON ISLE ROYALE, MICHIGAN Prepared in cooperation with the National Park...Isle Royale, Michigan By N. KING HUBER GEOLOGY OF ISLE ROYALE NATIONAL PARK, MICHIGAN GEOLOGICAL SURVEY...-···-·--· 2 The Portage Lake Volcanics on the Keweenaw Peninsula__ 3 The Portage Lake Volcanics on Isle...--- 13 Scoville Point, Middle Point, and Tobin Harbor Flows -------------------------------- 13 Huginnin...------Correlation between Isle Royale and the Keweenaw Peninsula ----------------------------------- |  | | 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 (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 (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. |  | | Journal (article/letter/editorial) | | [DT] Time resolution of geologic events on the Keweenaw Peninsula and implications for development of...Geological Engineering Geology and Geophysics, Michigan Technological University, Houghton, M I 49931...Three flood-type lava flows from the Keweenaw Peninsula in upper Michigan have been precisely dated, using...segregations within two basaltic flows. Ages from the Copper City Flow, near the base of the Portage Lake Volcanics...Portage Lake Volcanics and within the Copper Harbour Conglomerate, is 1087.2 ± 1.6 Ma from analyses of |  | | 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 |  | | 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 |  | | 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...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...refer to localities studied for this work. Copper Harbor is at 11. and over a stratigmphic interval |
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