 | Bodden, Thomas, Bornhorst, Theodore, Bégué, 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...accumulation of native copper in Michigan’s Keweenaw Peninsula. During a regional metamorphogenichydrothermal |  | | Journal (article/letter/editorial) | | GENESIS OF NATIVE COPPER LODES IN THE KEWEENAW DISTRICT, NORTHERN MICHIGAN: A HYBRID EVOLVED METEORIC AND METAMOPHOGENIC... Canada H3C 3A7 Abstract The Keweenaw Peninsula of northern Michigan is well known for early diagenetic...meteoric water from highlands adjacent to the Keweenaw rift basin would have provided a mechanism to...the native copper lodes on the Keweenaw Peninsula of northern Michigan (Fig. 1) is most commonly explained...and northwestward tilting toward the axis of the Keweenaw rift (a local segment of the Midcontinent Rift |  | | 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 (article/letter/editorial) | | very low-grade metamorphic rocks, Keweenaw Peninsula Michigan, USA Edward Hansen a,⁎, Jesse Reimink a...Hope College, 35 E 12th Street, Holland, Michigan 49423 USA Section 3.3 Chemistry and Physics of Earth...low-grade metamorphism Titanite TiO2 Pseudorutile Keweenaw Peninsula Prehnite–pumpellyite-facies a b s t r a...basalt and rhyolite clasts from the Keweenaw Peninsula, Michigan, USA which were metamorphosed to the prehnite–...clasts in a conglomerate from the Keweenaw Peninsula, Michigan, USA metamorphosed to the prehnite–pumpellyite-facies |  | | Journal (article/letter/editorial) | | THERMAL PLUME OF ORE FLUIDS ON THE KEWEENAW PENINSULA, NORTHERN MICHIGAN ALEX C. BROWN†,* Department of Civil...portion of the Portage Lake Volcanics on the Keweenaw Peninsula, despite similar host rocks extending for...strata may be attributed to upward thrusting on the Keweenaw fault during closure of the Midcontinent rift...anomalously hot, steeply dipping aquifers on the Keweenaw promontory, and to the development of a single...compact mining district on the Keweenaw Peninsula in northern Michigan has long perplexed exploration |  | 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...Rb-Srmethodto amygdule-fillingmicrocline,calcite, epidote,andchloritesuggests an ageof mineralizationbetween...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 |  | | 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) | | Houghton and Keweenaw Counties, Michigan TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...and Hecla Conglomerate in Houghton and Keweenaw counties, Michigan. Every summer in the Copper Country,...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton...565 I now spend six months of the year in the Keweenaw collecting minerals, doing research, and exploring...inches thick. However, at the Central mine in Keweenaw County the bed widens to 24–36 inches thick and |  | | 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...of species, including quartz, pumpellyite-(Mg), epidote, calcite, hematite, prehnite, laumontite, and copper...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University, He now |  | | 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...........................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) | | 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...in the Keweenaw Peninsula. PUMPELLYITE (6Ca0.3Al 2 0 3 .7Si0 2 .4 H a O ) , monoclinic, epidote family... Pumpellyite frequently is found growing upon epidote xls, replacing that mineral in clusters growing...the Hancock Mine, Hancock, it occurs upon xls of epidote and quartz formed later than those minerals. The |  | | Report (issue) | | 97 ± 7(5)0 X-ray Powder Pattern: Calumet, Michigan, USA. 2.90 (100), 3.79 (50), 2.74 (50), 2.452 (40)...Total [100.98] (1) Calumet and Hecla mine, Michigan, USA; original total given as 100.97%, corresponds...schists and in graywackes. Association: Chlorite, epidote, actinolite, lawsonite, glaucophane, prehnite,...Distribution: In the USA, in Michigan, at Calumet, Houghton Co., and elsewhere on the Keweenaw Peninsula and Isle...of copper deposit minerals of the Keweenaw Peninsula, Michigan, USA, and dominant magnesium content. Type |  | | 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 |  | | Journal (issue) | | of native copper in the Quincy mine ca. 1918. (Michigan Technological University Archives, Houghton) ...Donald Pearce (1941-1989) The “Copper King” 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) | | From Michigan’s Keweenaw Peninsula TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...1997). The common gangue minerals include quartz, epidote, calcite, chlorite, prehnite, pumpellyite, and...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 I’m |  | | 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) | | 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) | | 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...minerals including analcime, calcite, datolite, epidote, microcline, natrolite, prehnite, and quartz. The...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 (article/letter/editorial) | | 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Keweenaw Figure 1. A delicate group...Copper Country Figure 2. Generalized map of the Michigan copper district showing the location of the new...Mineral Finds in Michigan’s Copper Country T he Michigan Copper Country, also known as the Lake Superior...scenic Keweenaw Peninsula, which juts out into Lake Superior at the western end of Upper Michigan. The...Tom Rosemeyer, a native of Upper Michigan, is a graduate of Michigan Technological University in Houghton |  | | 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) | | 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) | | especially crystallized copper, adularia, and epidote. In 1985 mineral rights for the Caledonia mine... 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 Pen insula of Michigan this summer, there are numerous collect ing localities...Electrical Energy Resources Center on the campus of Michigan Tech nological University and is open without |  | | 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 200–300 inches not uncommon |  | | 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...calcium-rich monomineralic domains (metadomains) of epidote or pumpellyite. These metadomains grade outward...hydration of pre-existing rock, while at the base, epidote (H2O = 2 per cent) metadomains formed by dehydration |  | | 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...-Correlation between Isle Royale and the Keweenaw Peninsula ----------------------------------------...middle and upper Keweenawan rocks of northern Michigan and adjacent parts of Wisconsin-------------- |
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St. Louis Mine Exploration, Schoolcraft Township, Houghton County, Michigan, USA