 | | Journal (article/letter/editorial) | | 1.1 Ga Midcontinental Rift of the Keweenaw Peninsula, Michigan, USA Ria L. Mitchell a,ā , Nathan D. Sheldon...of Michigan, 2534 CC Little Building, 1100 North University Avenue, Ann Arbor, MI 48109-1005, USA b ...debris ļ¬ow sedimentary rocks from the Keweenaw Peninsula (Michigan, USA) are geochemically characterized to...lithologically-varied range of localities across the Keweenaw Peninsula, Michigan. Provenance indicators such as Ti/Zr... 2005). Most of the previous work on the Keweenaw Peninsula has focused on either economic geology of |  | Bornhorst, Theodore J., Paces, James B., Grant, Norman K., Obradovich, John D., Huber, N. King (1988) Age of native copper mineralization, Keweenaw Peninsula, Michigan. Economic Geology, 83 (3) 619-625 doi:10.2113/gsecongeo.83.3.619 | Journal (article/letter/editorial) | | Native Copper Mineralization,KeweenawPeninsula,Michigan THEODOREJ. BORNHORST,JAMESB. PACES, Departmentof...to the northwest of the Keweenaw Peninsula THE Keweenaw Peninsulaof Michigan is the location of a dormant...White Pine. youngestknownvolcanicactivityin the Keweenaw (1968, p. 314) hasarguedthat "mostof the mineralization...however, it is likely that ate at White Pine, Michigan (Fig. 1), about 70 km greenschist faciesconditionsexistedin...postdatethe main-stagecoppersulfideminin the Keweenaw Peninsula, occurs both as strati- eralizationat White |  | | Report (issue) | | University University Michigan Townsend Drive Drive 1400Townsend 1400 Houghton, Houghton, Michigan Michigan49931-1...field trip trip to to the T. J. the Keweenaw Peninsula, Michigan: Institute on Lake Superior Geology...Geology Proceedings, Keweenaw Peninsula, Michigan: Institute on Lake Superior Geology Proceedings, 40th 40thAnnual..."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 (issue) | | of native copper in the Quincy mine ca. 1918. (Michigan Technological University Archives, Houghton) ...Donald Pearce (1941-1989) The āCopper Kingā The MICHIGAN COPPER COUNTRY L. W i l s o n New Mexico Bureau...t a n l e y J. D y l II Seaman Mineral Museum Michigan Technological University % 1992 T h e M in e...crystal group, 13.6 cm, from an unknown mine in the Michigan Copper Country. Richard A. Kosnar collection;...wrote the classic work on the copper deposits of Michigan in 1929. Photo by Wendell E. Wilson. TENT . |  | | Journal (article/letter/editorial) | | discovered in 1844, is located on the Keweenaw Peninsula of Upper Michigan in the heart of the "Copper Country...mining operation and made it the first mine on the "Keweenaw" to pay dividends to stockholders. Throughout... N ative copper was first mined on the Keweenaw Peninsula several thousand years ago by Native Americans...three mineral tracts on the northern part of Keweenaw Peninsula. After examining the copper prospect near...saying that Tom Rosemeyer, a native of Upper Michigan, started his mining career with Calumet and Hecla |  | | Journal (article/letter/editorial) | | Copper-bearing Amygdaloidal Lode Houghton County, Michigan Lake Superior Native Copper District Sixteenth...TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net T he Lake Superior...Superior native copper district, also known as the Michigan Copper Country, is located on the sparsely populated...scenic Keweenaw Peninsula that juts out into Lake Superior near the western end of Upper Michigan. The...The Keweenaw winters can be long and cold with lake-effect snow accumulations of 200ā300 inches not uncommon |  | | Journal (article/letter/editorial) | | Copper-bearing Amygdaloidal Lode Houghton and Keweenaw Counties, Michigan TOM ROSEMEYER PO Box 369, 506 Pine Street...the secondmost-productive lode discovered in the Michigan copper district. In the heyday of mining it became...including analcime, calcite, datolite, epidote, microcline, natrolite, prehnite, and quartz. The longevity...the A. E. Seaman Mineral Museum on the campus of Michigan Technological University will let you relive the...Tom Rosemeyer is a native of Upper Michigan and a graduate of Michigan Technological University in Houghton |  | | Journal (issue) | | MICHIGAN COPPER! The Mineralogical Record JANUARY-FEBRUARY 2023 ? VOLUME 54 ? NUMBER 1 ? $40 ... KRISTALLE Est.1971 Laguna Beach, California, USA ā¢ Tel: +1 949 494 5155 ā¢ 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 |  | | Journal (article/letter/editorial) | | COPPER-BEARING FISSURE VEINS Keweenaw County, Michigan Downloaded by [University of Delaware] at 05:05...leading to ore bins. On the left are ore cars of the Keweenaw Central Railroad being loaded with chunks of mass...as the Michigan Copper Country, is located on the scenic, rugged, and isolated Keweenaw Peninsula, which...into Lake Superior at the western end of Upper Michigan. The native copper mines that comprised the district...Houghton, and Keweenaw counties. The now-dormant copper mining industry of the Keweenaw Peninsula produced |  | | Journal (article/letter/editorial) | | From Michiganās Keweenaw Peninsula TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...barite, datolite, apophyllite , natrolite, and microcline (variety adularia) occur less frequently as free-growing...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton...This was in October 1962 when I and two other Michigan Tech students were collecting in the underground...spend about six snow-free months living in the Keweenaw. I do a lot of collecting during the time Iām |  | | Journal (article/letter/editorial) | | Iuyw I , < h,,,rl,rp,, ,,I I r,,,,l>,l\ T HE MICHIGAN COPPER DISTRICT stretches in a southwest-northeast...southwest-northeast direction along the western Upper Peninsula for approximately 100 miles, from the White Pine mine...mine in Ontonagon County to Copper Harbor in Keweenaw County. Copper mineralization occurs in two types...the scientific world. From 1844 through 1995 the Michigan copper district produced a reported 14,595,357...worldclass native-copper deposits of the Keweenaw Peninsula and the sediment-hosted stratiform copper |  | | Journal (article/letter/editorial) | | George Robinson, Michigan Technological University. neW DATA On MIneRALs fROM THe KeWeenAW cOPPeR DIsTRIcT...material from several former mines on the Keweenaw Peninsula, Michigan, has revealed the presence of several...occurrence of anilite (Cu7S4) near Painesdale, Michigan (Heinrich and Robinson 2004), carbonate matrix...stromeyerite and is the first report of this mineral for Michigan. It has been suggested that alteration of silver-bearing...1.2 mm, from the Baltic mine, Houghton county, Michigan. Dan Behnke specimen and photomicrograph. Figure |  | | Journal (article/letter/editorial) | | 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 from...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 |  | | Book | | Mineralogy of Michigan by E. W. Heinrich updated and revised ā¢ by George W. Robinson M By E W~ Hellnr]ch...Museum Michigan Technological University Houghton, Michigan 49931 2004 Ā© 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) | | MICROMOUNTING AT THE KEWEENAW PENINSULA, MICHIGAN By PAUL B. MOORE and RICHARD M. 6EGER Depr. of Geolophysical...UNIVERSITY] at 03:21 25 August 2017 INTRODUCTION The Keweenaw Feninsula is well-known for its fine specimens...minerals are the best found anywhere in the Keweenaw Peninsula. PUMPELLYITE (6Ca0.3Al 2 0 3 .7Si0 2 .4 H...amounts in nearly every other mine throughout the Peninsula. ROCKS AND MINERALS Downloaded by [JAMES COOK...good xls; forming the base for natrolite xls at Keweenaw Point in soft amygdaloidal basalt; Kearsarge Mine |  | | Report (issue) | | 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...of Natural Resources, P.O. Box 30028, Lansing, Michigan 48909 On deposf-t in public libraries, state |  | | Journal (article/letter/editorial) | | AMYGDULE MINERAL SERIES, RICHARD E. ZONING IN MICHIGAN STOIBER THE COPPER AND EDWARD PORTAGE DISTRICT...Superior flows of Keweenawanage outside of the Michigan copper district ......................... Mineralogyof...Portage Lake lava seriesof the KeweenawPeninsula,Michigan, three overlappingamygdulemineral zones--prehnite...seriesthroughoutthe Lake Superior basin is like that of Keweenaw Peninsula,indicating that the mineral zones have regional...Victoria,Ontonagon County,Michigan,northeast to the end of theKeweenaw Peninsula (Fig. 1). Muchis knownaboutthe |  | | Report (issue) | | 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...volcanic rock fragments, high content of altered microcline, lack of micas, and the occurrence of zeolites...deposited. Two sites on the north shore of the Keweenaw Peninsula were examined, both areas that typify the...percent) consists of slightly to intensely altered microcline and associated minor plagioclase (albite), orthoclase |  | | Journal (article/letter/editorial) | | MICROCLINE IN THE NATIVE COPPER DEPOSITS OF MICHIGAN Ina KrorN, Stanf ord, U ni.oersity, C al'iJorni...intensive mining activity in the copper country of Michigan, and detailed study of the native copper deposits...of the ore bodies is a very unusual variety of microcline, has not been appreciated. In this paper its...newly discovered native copper deposits of Keweenaw peninsula of a "peculiar reddish variety of orthoclase"...development in small amounts "in all the mines from Keweenaw Point to Ontonagon" in association with analcite |  | | Journal (article/letter/editorial) | | TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net All mineral photography...Mineralogy of the St. Louis Mine Houghton County, Michigan Twentieth in a series of articles on the mines...about 1.3 miles east of the village of Laurium, Michigan. This little-known locality is seldom visited...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University, He now...Lake Superior copper district in Houghton and Keweenaw counties. The copper-bearing Portage Lake Volcanics |  | | Journal (article/letter/editorial) | | SomeCopperSulfideDeposits Near Mount Bohemia,KeweenawCounty, Michigan JAMESM. ROBERTSON Abstract Coppersulfides,in...interestingamounts,have recentlybeendiscoveredin the Keweenaw Peninsulaof northernMichigan, a district long...basal part of the NonesuchShale at White Pine, Michigan, the sulfidesof the Lake Superior Copper especially...BOHEMIA more than brief mention of sulfides in the Keweenaw 1203 Geologic Setting Peninsulain his report...geologyof the KeweenawPeninsulahasbeen Mount Bohemia, Michigan. Although primarily a comprehensively describedby |  | | Journal (article/letter/editorial) | | Survey, National Center-MS 954, Reston, VA 22092, USA (Received October 10, 1990; accepted after revision...Survey, National Center--MS 954, Reston, VA 22092, USA. tinent rift system (MRS) of North America is one...the famous native copper deposits of the Keweenaw Peninsula, the stratiform copper sulfide and native... ONIARIO WISCONSIN 3.6-1.85 1.85 'li'J i MICHIGAN ILLINOIS 1.5-1.4 i i 1.1 j ' i IZ IIII i...Locationof the rift south of LakeSuperiorin Minnesota,Michigan,Wisconsin,Iowa, Nebraska, and Kansas is inferred |  | | Journal (article/letter/editorial) | | Ā Colorado for the past twenty years. venture, Michigan, Hilton, Minesota, and other mines. Microminerals...Microminerals of the CALEDONIA MINE Ontonagon County, Michigan Most of the major mines were closed by 1920,...collector headed for the Upper PenĀ insula of Michigan this summer, there are numerous collectĀ ing localities...Electrical Energy Resources Center on the campus of Michigan TechĀ nological University and is open without...collecting areas in the Keweenaw Peninsula while I was a student at Michigan Tech were the Caledonia |  | | Journal (article/letter/editorial) | | bottom of Lake Superior near Eagle Harbor, Keweenaw County, Michigan. The near-shore find, now called the Laker...000ā15,000 feet, and form the āspineā of the Keweenaw Peninsula. Interbedded with the basalt flows are twenty-two...Lankton 2006). In the central portion of the Keweenaw Peninsula the strike of the PLV changes from northeast...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University. He now...August 2008, Barron and Peterson left Calumet, Michigan, with Petersonās 23-foot cabin cruiser in tow |  | | Journal (article/letter/editorial) | | Mine, Ontonagon County, Michigan -- Downloaded by [University of Michigan] at 08:51 04 August 2017... is located at the southern end of the famous Michigan native copper district and is the last operating... Caledonia mine Downloaded by [University of Michigan] at 08:51 04 August 2017 -- Figure 2 (above)...ROCKS & MINERALS Downloaded by [University of Michigan] at 08:51 04 August 2017 Figzire 6. One of the...Figure 9 (Zeft). A 1.9-mm calcite on copper with microcline, fissure vein, 850 stope. Authorās collection; |
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Osceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA