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| 18 November 2014 Figure 1. Underwater view of agate extraction in about 12 feet of water. The agates...the hammer blows allowing complete removal of the agate nodule with minimal damage. Joanie Barron photo...TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter.net Up Twenty-first in...from Lake Superior KEWEENAW COUNTY, MICHIGAN Tom Rosemeyer is a native of Upper Michigan and a graduate...graduate of Michigan Technological University. He now spends a good part of the year in the Copper Country researching |
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| 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...Country Figure 2. An exceptional copper-included agate, measuring 0.7 × 1.0 cm. The central circular red...contains micro-sized copper inclusions; the rim of the agate contains more massive inclusions. TR specimen. ...about 1.3 miles east of the village of Laurium, Michigan. This little-known locality is seldom visited |
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| Lode Houghton County, Michigan TOM ROSEMEYER 57647 Caledonia Street Calumet, Michigan 49913 datolite@charter...agates. Tom Rosemeyer photo, 6 September 2011. All agate photos by Larry Maltby of specimens in the author’s...collection D Figure 2. A 1.1 × 1.2-cm copper-banded agate in the typical dense basaltic matrix that hosts...partial copper rim and attractive banding in the agate itself. Collected by Ray Just, C & H No. 21 mine...copper-bearing amygdaloidal lode in Houghton County, Michigan. These unusual agates, which range in size from |
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| 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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| 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 |
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| 64-66 Supt.of Docs. No.: 119.3:1309 1. Geology-Michigan-Isle Royale National Park-Guide-books. I. Title...Prehnite the little pink pebbles _____________ Agate an array of colors _________________ What the future...copper mining by Europeans was established on Keweenaw Peninsula and had been attempted on Isle Royale (fig...Foster and Whitney is that Isle Royale and the Keweenaw Peninsula may be regarded as geologic counterparts...may be regarded as infinitely less valuable than Keweenaw Point." The first period of mining activity on |
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| The University of Michigan Mineral Collection Ann Arbor Downloaded by [University of Bristol] at 07:28...T he mineral collection at the University of Michigan is among the oldest and finest in the Great Lakes...prominent were those associated with the state of Michigan. A number of the specimens are pictured in the...of Michigan. No other mineralogical collection, save that of the A. E. Seaman Museum at Michigan Technological...University, is more important historically to Michigan. Although the collection continued to be an important |
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| MICHIGAN and the LAPIDARY R U S S E L L P. MACFALL P.O. Box 309 Coronado, California 92118 Figure...in the sedimentary heartland of our continent, Michigan has perhaps more to offer the paleontologist than...stone—is primarily a trophy of the former. But Michigan is a big state, and its northern edge in cludes...Hexagonaria percarinata, is the official state stone of Michigan. It is a colonial fossil found in Devonian period...period limestone in the northernmost Lower Peninsula counties of Charlevoix, Presque Isle, Emmet, Cheboygan |
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| 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 |
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| 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...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...researches the mineralogy and mining history of the Michigan copper district and the San Juan Mountains, Colorado |
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| Africa Government Information Office July 18, 1957 MICHIGAN VACATION - 1956 People, Places and Prospects Lawrence...activity and mineral collecting, the Upper Peninsula of Michigan is still a profitable and beautiful objective...open-air vacationer. Hundreds of mine dumps, miles of agate beaches, increasing numbers of modern motels and...and iron country. Our twelve days on the Upper Peninsula was happily filled with sightseeing with cameras...Lure Book from the Upper Peninsula Development Bureau at Marquette, Michigan, for scenic and historical |
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| bottom of Lake Superior near Eagle Harbor, Keweenaw County, Michigan. The near-shore find, now called the Laker...000–15,000 feet, and form the “spine” of the Keweenaw Peninsula. Interbedded with the basalt flows are twenty-two...These lava flows crop out from Great Sand Bay to Agate Harbor and form the rough and scenic shoreline of...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 |
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| News from the Keweenaw Downloaded by [Florida State University] at 18:43 12 November 2014 Part 3—Recent...years have passed since the last “News from the Keweenaw”; this article updates new finds to the spring...Tom Rosemeyer is a native of Upper Michigan and a graduate of Michigan Technological University in Houghton...construction in the Keweenaw. However, extensive logging operations, primarily in Keweenaw County, have increased...Copper District Figure 3. A generalized map of the Michigan copper district showing the location of new mineral |
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| February 2015 Figure 2. A generalized map of the Michigan copper district showing the location of new finds...localities are arranged geographically, starting with Keweenaw Point and continuing in a southwestern direction...end of the district. Keweenaw Point, Keweenaw County The waters off Keweenaw Point have drawn much attention...since the publication of the first “News from the Keweenaw” article that described the occurrence of yellow... To date, he has discovered two areas between Keweenaw Point and Manitou Island where datolite occurs |
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| Pink Prehnite from Michigan A MINERAL MUCH CONFUSED N. KING HUBER U.S. Geological Survey 345 Middlefield...Park, California 94025 Figure 1: Lake Superior agate. Cranbrook institute of Science specimen. Photo...prehnite pebbles from beaches on the Keweenaw Peninsula of Michigan also are commonly confused with thomsonite...pink variety, is equally abundant on the Keweenaw Peninsula. One readily accessible locality is at a...the statue of the miner in the city of Houghton, Michigan. A History of Misidentification With specific |
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| ... 11 Porcelaneous Datolite of the Keweenaw Peninsula, Michigan ........................... 12 Faceting...purchased petrified wood, jade, and many types of agate. I know how much weight I was carrying because I...heading toward Montana to collect some Montana agate. As we were traveling through North Dakota, we noticed...FEBRUARY 2014 Porcelaneous Datolite of the Keweenaw Peninsula, Michigan by: Paul T. Brandes Member of the Houston...porcelaneous variety that is found on Michigan’s Keweenaw Peninsula. The following is a brief description of |
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| 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...vesicular rock yields the best specimens. Also found in agate-quartzlined vugs in soft chloritic rock. Occurs...amounts in nearly every other mine throughout the Peninsula. ROCKS AND MINERALS Downloaded by [JAMES COOK |
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| 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 |
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| 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 |
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| A K I N G ARROWPOINTS (P/\ R T By GEM MINERALS—AGATE, Downloaded by [Purdue University Libraries] at...learned that the dull chert might grade into an agate; how frost and wave could loosen the jasper from...preserved them as choice relics, and when in upper Michigan, or down in Tennessee, we pick up a beautiful...the finer chalcedonic forms of quartz including agate, carnel ian, prase, plasma, and other varieties...widely distributed. Not far from Sault St. Marie, Michigan, but on the Canadian side, there is a large out |
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| 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 |
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| former is perhaps best known from the Keweenaw Peninsula of Upper Michigan (Fig. 3; the Yooper Region, check...Fig. 3. Native copper specimens from the Keweenaw Peninsula. The UP copper is found in rocks associated...zillions!). One arm extended southeast through Lower Michigan while a second arm trended west along the Minnesota-Ontario...well-exposed around Lake Superior and the Upper Peninsula of Michigan. However, geologists are aware of the well-defined...oil) have bored into MRS rocks. Scientists at Michigan State University have described the (www.geo.msu |
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| of their metallogenic specialization. Keywords: agate; Avacha Bay; Kamchatka; Russia; copper; SEM; EPMA;...mineralogy of agate nodules in basalts has been studied and summarized in many papers [1–19]. Agate is a banded...Some common secondary minerals can be found in agate. Oxides of iron add color, but calcite would be...found as an outer coating but can be found in the agate from basic igneous hosts. Nevertheless, copper and...copper, cuprite, and zincite are found in the Ayaguz agate deposit (East Kazakhstan) [18]. Here, native copper |
 | Arena, K.R., Hartmann, L.A., Baggio, S.B. (2014) Geological controls of copper, gold and silver in the Serra Geral Group, Realeza region, Paraná, Brazil. Ore Geology Reviews, 63. 178-200 doi:10.1016/j.oregeorev.2014.05.005 | Journal (article/letter/editorial) |
| and are well known as host rocks of amethyst and agate mineralization and occurrences of native copper...Geral Group is the host of world class amethyst and agate deposits and may also contain large deposits of...their filling with amethyst and agate. The main deposits of amethyst and agate (Duarte et al., 2009; Hartmann...province (Prinz, 1967), 125 ppm in the Keweenaw lavas of Michigan (Prinz, 1967), 125 ppm in the Karroo...described in the basalts in northern Michigan (Keweenaw Peninsula, ACCEPTED MANUSCRIPT 14 1109-1085 |
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| the copper mining industry in Michigan’s Keweenaw Peninsula have been captured numerous times on film...author/artist of Is This an Agate? An Illustrated Guide to Lake Superior’s Beach Stones, Michigan (self-published...support of a grant she received from ArtServe Michigan. The panels are on display in historic Saint Anne‘s...Center (formerly Saint Anne’s Church) in Calumet, Michigan. The buildings and headframes in the panels are...Copper Country Community Arts Center in Hancock, Michigan, and were part of BellHanson's mining history |
Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Calumet Township, Houghton County, Michigan, USA