 | | 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 |  | | 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 © 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) | | 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 Stewart†1 and Jeffrey L. Mauk2 †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) | | 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 |  | | 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 |  | | 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 “Copper King” 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) | | Copyright © 1999 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/99 $20.00 ⫹ .00 Pergamon...Indiana University, Bloomington, IN 47405-1403, USA (Received September 14, 1998; accepted in revised...Beaver Bay Complex; DC, Duluth Complex; CCD, Carlton County dikes; NLS, Nathan’s layered series; LS, Logan...Schroeder basalts Manitou transitional basalt Bell Harbor lavas Palisade rhyolite flow Baptism River lavas...area are composed of a red-bed type sequence of conglomerate, sandstone, and siltstone (Ojakangas and Morey |  | | 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 |  | | Journal (article/letter/editorial) | | 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...the stratigraphic section, laumontite, analcime, albite, and chlorite dominate assemblages characteristic...restriction netic m nation | Eagle Harbor__ -A Copper Harbor Jacobsville Fm (sandstone) - » I - J Conglomeratic |  | | Journal (article/letter/editorial) | | GEOCHRONOLOGY OF THE KEWEENAWAN WHITE PINE, MICHIGAN • SAMBHUDAS CHAUDHURI AND GUNTER 8 ROCKS...suites of felsite from the White Pine area of Michigan indicate dates ranging from 978 q- 40 m.y. to...diageneticrather than a syngeneticorigin for the copper sulfide in the basal portion of the NonesuchShale...NonesuchShale. INTRODUCTION T•4E Keweenan peninsulaof Michigan has been an important producer of copperfor more...conglomerates. In the vicinityof White Pine, Ontonagon County,chalcocite and minornativecopperoccurin ,thelower |  | | Journal (article/letter/editorial) | | Sedimentary Rock-Hosted Stratiform Copper Deposit, Upper Peninsula, Michigan Theodore J. Bornhorst1,† 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 (article/letter/editorial) | | SomeCopperSulfideDeposits Near Mount Bohemia,KeweenawCounty, Michigan JAMESM. ROBERTSON Abstract Coppersulfides,in...the Keweenaw Peninsulaof northernMichigan, a district long famousfor its depositsof native copper. The...flow tops,a traditionalmodeof occurrenceof native copper in the region. An andesitedike (or dikes), almost...reconstructed. Previousinvestigations conglomerates. Copper sulfides, in moreinteresting amounts,were discovered...exception of the copper depositsin the basal part of the NonesuchShale at White Pine, Michigan, the sulfidesof |  | | Journal (article/letter/editorial) | | THE KEARSARGE Copper-bearing Amygdaloidal Lode Houghton and Keweenaw Counties, Michigan TOM ROSEMEYER...Figure 1. A classic group of free-growing, complex copper crystals, measuring 5.5 × 10.0 cm, attributed to...articles on the mines and minerals of Michigan’s Copper Country Downloaded by [Columbia University] at...KEARSARGE LODE was one of seven blanket-type native copper orebodies that were mined in the brecciated amygdaloidal...secondmost-productive lode discovered in the Michigan copper district. In the heyday of mining it became |  | | Journal (article/letter/editorial) | | IN THE WHITE CO., MICHIGAN CARPENTER ABSTRACT The dominant facies of copper mineralization at White...White Pine, Michigan, is characterizedby a distinct relationshipof copper to sedimentary features and...chalcocite during or shortly after faulting. Native copper,native silver, blue chalcocite,covel- lite, bornite...adjacent wall rock in that native copper is absent,and the average copper content is lower. The amount of...outer parts of the halos. The overall deficiencyof copper in the halos is apparentlycoinpensated by the occurrenceof |  | | Journal (issue) | | 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...gemgypsy@bellsouth.net JANUARY–FEBRUARY 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) | | SEDIMENT-HOSTED Cu DEPOSITS:H 267 The association of copper(lead and zinc)-minerlittoralsandsor sandbars or...conformable contact with the herocks,and the absenceof copper-mineralizedsedimatite-bearingsediments or inferredsourcerocks...changein oxidationstate,suggests that the metal2. Copper (lead and zinc)-mineralizedsediments transportingwater...McArthurbasin(Muir, 1979),partsof the Gunpowder Pine copper mineralizationis adjacentto an inter- Creek Formation...the Seven Rivers Formation, (Ensignet al., 1968). Copper mineralizationin the southeastNew Mexico (Sarg |  | | Journal (article/letter/editorial) | | NONESUCH FORMATION IN THE VICINITY OF THE WHITE PINE COPPER MINE, MICHIGANI GEJING LI, ]EFFREY L. MAux.,2...ofGeological Sciences, University ofMichigan, Ann Arbor, Michigan 48109-1063 Abstract-The Middle Proterozoic (1...Formation, host ofthe stratiform copper deposit at White Pine, Michigan, consists of 200 m of principally...White Pine mine area by hydrothermal fluids during copper mineralization. Tbe Ti02 crystals and corrensite-like...well-developed. The White Pine sediment-hosted stratiform copper deposit is located in the Lake Superior portion |  | | Report (issue) | | 28 Geologic Structure East and South of the Keweenaw Fault on the Basis of Geo physical Evidence L...Mountains, which is indicated from the geology of the Keweenaw Peninsula and from recent aeromagnetic data [Hinze...of Lake Superior through the Lower Peninsula of Michigan. Much of the western half of the Lake Superior...major thrust faults, a number of which occur in Michigan and Wisconsin and strike parallel to the axis...strongly folded, in central Minnesota, northern Michigan, and Wisconsin, a pronounced unconformity usually |  | Hayes, T. S., Landis, G. P., Whelan, J. F., Rye, R. O., Moscati, R. J. (2012) The Spar Lake Strata-Bound Cu-Ag Deposit Formed Across a Mixing Zone Between Trapped Natural Gas and Metals-Bearing Brine. Economic Geology, 107 (6) 1223-1249 doi:10.2113/econgeo.107.6.1223 | Journal (article/letter/editorial) | | 29‰ sulfide from TSR. Introduction THE SPAR Lake copper (Cu)-silver (Ag) deposit is a red bedassociated...resources of more than 123 Mt of greater than 0.75% copper and greater than 65 g/t Ag (Mines Management, Inc...that Harrison (1972) named the western Montana copper sulfide belt (Fig. 1). Within that belt, the Revett...containing any Cu or Pb sulfides. The western Montana copper sulfide belt lies between areas where the entire...parts of the Belt Supergroup in the western Montana copper sulfide belt. The column is from J.E. Harrison |  | | Report (volume) | | selected aplites and quartz veins of White Pine County, Nevada, by D.E. Lee, E.L.M. Brandt, and J.D. Gleason...micas from meta_clastic rocks of eastern White Pine County, Nevada, by D.E. Lee, R.E. Van Loenen, E.L.M. Brandt...Platinum and palladium in a mafic dike, Sanders County, Montana, by R.E. Van Loenen, Joseph Haffty, and...shale, Davis Formation, near Leadwood, St. Francois County, Missouri 7 2 Contents CONTRIBUTIONS TO MINERAL...feldspathic shale from the Deadwood Formation, Lawrence County, S. Oak. [LOI, loss on ignition at 9000C; n.d. |  | | Report (issue) | | Correlation Program Project 2 54 Frontispiece: Nickel-copper-zinc-mineralized, Proterozoic (1 .96-2.00 Ga) black...Middle Proterozoic Nonesuch Formation of northern Michigan, by Philip A. Meyers, Eileen S. Ho, and Jeffrey...mineralization of the Rabbit Creek Gold deposit, Humboldt County, Nevada, in Geology and ore deposits of the Great...Nansheng 2 Since 1985, deposits near Songlin, Zunyi County, Guizhou Province, in the People's Republic of...major basement structure in Linn County, Kansas, and Platte County, Missouri, what may be minor expulsion |  | | Report (issue) | | thrust-a major fault in the eastern part of Inyo County, Calif., by J. H. Stewart, D. C. Ross, C. A. Nelson...Permian-Triassic boundary in eastern Uintah County, Utah, and western Moffat County, Colo., by E. M. Schell and E....results of geochemical prospecting in northern Michigan, by Kenneth Segerstrom and W. H. Raymond____ ...thick-bedded maroon and brickred sandstone, conglomerate, and mudstone containing a few beds of gray...(Godwin and Gaskill, 1964). West of Crested Butte, conglomerate and sandstone of the Ohio Creek Formation of |  | | Report (volume) | | Bulletin, nos. 19, 21. Hartford, Conn. Delaware County Institute of Science: Proceedings, vol. 6, nos...4, no. 1; Boletin, no. 29. Mexico, D. F. . - ' Michigan Geological and Biological Survey: Publications...Olympia, Wash. West Virginia Geological Survey: County reports Doddridge-and Harrison counties. Morgantown...Sketch of the geological history of Green Lake County, Wisconsin : School x Quart., Berlin, Wis., vol...Alien, R. C. The iron mining industry of Michigan; Michigan gold! others no. 13. '**-,, * * See Aiten |
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