 | | Journal (article/letter/editorial) | | Pseudomorphs of Prehnite after Laumontite from St. Louis and Lake Counties Minnesota MIKE HEDTKE PO Box...Box 258 Clearbrook, Minnesota 56634-9649 All mineral photos by Jeff Scovil of specimens from the author’s...exposed along the Knife River, St. Louis County, Minnesota. Fieldwork during fall 2000 and winter 2001...2001 produced several finds of prehnite pseudomorphs after laumontite, some with native copper inclusions...the Knife River, north of Duluth, Minnesota. Prehnite and prehnite with native copper inclusions are |  | Park, Y.-R., Ripley, E. M., Miller, J. D., Li, C., Mariga, J., Shafer, P. (2004) Stable Isotopic Constraints on Fluid-Rock Interaction and Cu-PGE-S Redistribution in the Sonju Lake Intrusion, Minnesota. Economic Geology, 99 (2) 325-338 doi:10.2113/gsecongeo.99.2.325 | Journal (article/letter/editorial) | | Cu-PGE-S Redistribution in the Sonju Lake Intrusion, Minnesota YOUNG-ROK PARK,* EDWARD M. RIPLEY,† Indiana...MILLER, JR., Minnesota Geological Survey, 2646 University Avenue West, St. Paul, Minnesota 55114-1057 ...Sciences, Bloomington Indiana 47405 Abstract The Sonju Lake intrusion, part of the 1.1 Ga Midcontinent rift-related...sequence of mafic cumulates located in northeastern Minnesota. Basal melatroctolite and dunite layers are overlain...between rocks in the PGE-Cu-S interval of the Sonju Lake intrusion and an externally derived fluid at low |  | | Journal (issue) | | Sulfosalts New to Darwin Mining District, Inyo County, California Gail E. Dunning 773 Durshire Way Sunnyvale...California 95060 The Darw in mining district, Inyo County, California has lo ng been known for its deposits...Kinoite? from Lake County, Minnesota Mike Hedtke Route 1 Box 267 Clearbrook, Minnesota 56634 - What...for copper mineralization along the north shore of Lake Superior. In early June of 2000, because of extremely...by walking the river bars looking for pieces of prehnite which many times contain copper and associated |  | | Book | | org/details/midwestgemfossil0000zeit Midwest Gem, Great Minnesota, Fossil and Mineral Trails Lakes States Wisconsin...recent years the largest Lake Superior agate ever reported was found in Minnesota, and new species of fossils...first. The states start with the farthest west, Minnesota, and move in sequence to the farthest east, Ohio...shoreline are east of the Mississippi except for Minnesota, where the Mississippi originates in the northcentral...Paul. Minnesota is a Lake Superior State. Wisconsin has shoreline on both Lake Superior and Lake Michigan |  | | Journal (article/letter/editorial) | | Racine (Scovil 1994), the pegmatites of Florence County (Koehier 1989) and the Wausau area (Falster 1987)...Keweenaw Peninsula. Many of the minerals (copper, prehnite, laurnontite, and datolite) found in the Upper...zircon), particularly in the Wausau area of Marathon County (Falster 1987). Middle Proterozoic quartzites (1...drift deposits produce many interesting specimens. Lake Superior agates abound in the glacial debris and...Wisconsin mineralogy. The index is arranged county by county (fig. 1). Where possible, township and range |  | | Journal (article/letter/editorial) | | Institute, University of Minnesota, Duluth, 5013 Miller Trunk Highway, Duluth, Minnesota 55811 Abstract The...elements partitioned. Amphibole, chlorite, sericite, prehnite, pumpellyite, and carbonate are associated with...conduit system in the vicinity of the area (the Nickel Lake Macrodike; Peterson, 2002b; Figs. 1, 2) led to a... 1. Generalized geologic map of northeastern Minnesota. Highlighted intrusions of the Layered Series:...Series: BEI = Bald Eagle intrusion, NLM = Nickel Lake macrodike, SKI = South Kawishiwi intrusion. Modified |  | | Journal (article/letter/editorial) | | Vol. 2 —Gems — (Kalamazoo M i n . Society) MINNESOTA MINERALS Via Gemstone Gems QUARTZ MINERALS . ...mine near Biwabik. types of quartz common to Minnesota in BINGHAMITE . . . is usually red or clude the...Gunflint T r a i l . Its color is laven der to purple. LAKE SUPERIOR AGATE . . . (Offi cial State Gemstone)...i s is strictly a Minnesota stone, found in the basalt along the north shore of Lake Superior about 13...zeolites and the most colorful varieties are in Minnesota. It may be found along the north shore, on the |  | Li, Chusi, Ripley, Edward M., Oberthür, Thomas, Miller, James D., Joslin, Gregory D. (2008) Textural, mineralogical and stable isotope studies of hydrothermal alteration in the main sulfide zone of the Great Dyke, Zimbabwe and the precious metals zone of the Sonju Lake Intrusion, Minnesota, USA. Mineralium Deposita, 43 (1) 97-110 doi:10.1007/s00126-007-0159-x | Journal (article/letter/editorial) | | the precious metals zone of the Sonju Lake Intrusion, Minnesota, USA Chusi Li & Edward M. Ripley & Thomas...Great Dyke and the precious metals zone of the Sonju Lake Intrusion have, in part, been attributed to the...component was involved in the alteration of the Sonju Lake Intrusion. The strong spatial association of platinum-...Sciences, Indiana University, Bloomington, IN 47405, USA e-mail: cli@indiana.edu C. Li China University of...Germany J. D. Miller Jr Minnesota Geological Survey, St. Paul, MN 55114, USA J. D. Miller Jr : G. D. |  | | Journal (issue) | | universi ties in the area, including the Los Angeles County Museum of Natural History, California Institute...314-726-2236). amlier linritc on ijolilen csilcite! mcailc county* south ilakotn Extensive mining of six miles of...workings. In the 1870’s the Trigo Mountains, Yuma County, Ari zona occurrences were discovered. The list...Department of Geology and Geophysics, University of Minnesota • Minneapolis 55455 WHY READ THIS? To the mineral...the Space Science Center of the University of Minnesota. O 10 A had been obtained (Fischer, 1954) and |  | | Journal (issue) | | Carolina). Chalcedony after interstices from Chester County, Pa., has been described by Vaux, G., 1935] ...1884, 'A Crystallographic Study of the Thinolite of Lake Lahontan,' U. S. Geol. Surv. Bull. 12, 34 pp. Discussion...after Diopside. Pierrepont, New York Quartz after Prehnite. Auvergne, France Malachite after Brochanthite...Calcite after Unknown: I, B 2 a Mono Lake, California, 8071, and Pyramid Lake, Nevada, 6894 (thinolite1) 'Dana...Silesia, 8678 Cervantite after Antimony: I, C 2 Kern County, California, 17240, 18383 (stibioconite ?) Cervantite |  | | Journal (article/letter/editorial) | | about 35 miles northwest of Flagstaff, in Coconino County, a pineforested volcanic area. The elevation is...in California recently I visited the Los Angeles County Museum in Los Angeles to see the famous collection...locality on the shores of Lake Chápala near Guadalajara, Jalisco, Mexico. The lake had been shrunken by drouth...in Los Angeles can walk across the lawn to the County Museum for another thrill—the display of some of...a mine east of Leadville (Lake Co.). Colo., almost at the end of Lake County, I found a specimen of small |  | | Book (volume) | | Dahlonega Co. and Rabum Co., and the McDuffie County Belt extending through portions of McDuffie, Warren...Sphalerite. BALDWIN COUNTY MILLEDGEVILLE, at state farmjasper. BANKS COUNTY COMMERCE, along Hwy. 59...along adjoining Co. linerock crystal. BARROW COUNTY WINDER, along rd. to Jefferson and 1½ mi. inside...Guide for Rock Hounds in the United States BARTOW COUNTY AREA, Saltpeter Cave, as floatjasper. CARTERSVILLE:...agate, (banded, various colors), jasper. BIBB COUNTY MACON: at Holton Quarry, 7½ mi. NWagate; N |  | | Journal (article/letter/editorial) | | Limonite and hematite are stripped mined in Crenshaw County, Alabama, and specimens collected are very interesting..."Limonite and hematite are to be found on most any county road south of Montgomery (Montgomery Co.), Ala...Crenshaw County—Davenport, Highland Home, Bradenton and Petrey are all small towns in Crenshaw County near...from Howard V. Hamilton, 1340 Crandall Ave., Salt Lake City 6, Utah. "Stibiotantalite—Sb (Ta, Cb) 0 4 —associated...Shoup, P. O. Box 756, Salmon, Idaho. "Shoup, Lemhi County, Idaho. Scheelite (Tungsten) has been found in |  | | Book (edition) | | MARIN COUNTY FREE LIBRARY 3 1111 00289 4184 \ I s Fifth Revised Edition A complete, state-by-state...California and the Sonoran desert of Arizona, the lake beaches of the Middle West, the broad plains and...and pitted. To differentiate smithsonite from prehnite, heat the mineral in a closed glass tube. Smithsonite...banded agate and such minerals as thomsonite and prehnite, and in the form of geodes containing crystal...the granite rocks of Canada and the lavas of the Lake Superior region, and to the south the Mississippi |  | | Book (edition) | | describes sites under of the nearest town and county. and the many maps included book contain such...have skimmed over the water as you walked along a lake shore were some from which beautiful gems could...hydrofluoric acid which it gray and pitted. To from prehnite, heat the mineral in a closed glass tube. Smithsonite... the north the lavas of the lie the granite Lake Superior region, less At meet the rocks of ...bottom of gravel beds. The expert agate hunters of Minnesota say that big ones are found How to hunt for |  | | Journal (article/letter/editorial) | | as specimens. Clarksville is in southern Johnson County in N / W Arkansas. COLORADO — "Recently we took...located one mile west of Wilbur Springs in S/W Colusa County in North California. The ore of the Manzanita Mine...garnet mine at Roxbury Falls, in Southern Litchfield County of western Connecticut. Mrs. Scheffer's crystal...schist. GEORGIA — At Maysville, in southern Banks County in N.E. Georgia, nice quartz xls occur, so we have...inch in length. Bedford is in central Lawrence County in southern Indiana. IOWA — Dean Slindee, Box 55 |  | | Journal (article/letter/editorial) | | the Ute Mountain Gem & Mineral Society. Montezuma County Annex Bldg., 103 N. Chestnut. Info.—John Ferrin...Mineral & Jewelry Festival sponsored by the Oxford County Mineral & Gem Association. Oxford Fair ground...Grove Arena (next to Science North), 100 Ramsey Lake Road. Info.—Roger Poulin, R.R. #3, Site 1, Box 3...Pinebridge Inn (wholesale). Info.—Jim Burgess, Mitchell County Chamber of Commerce, Rte. 1, Box 7%, Spruce Pine...be on Display. THE "AZTEC SUN" returns to the USA for the first time in ten years. SHOW INFO: P.O |  | | Book (volume) | | ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE...nodules⎯Pyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS, area countywide exposures of blue clay...HIGHLAND COUNTY SINKING SPRING, area ore deposit (most important in Ohio) ⎯Hematite. HOCKING COUNTY AREA |  | | Book (volume) | | ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE...nodules⎯Pyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS, area countywide exposures of blue clay...HIGHLAND COUNTY SINKING SPRING, area ore deposit (most important in Ohio) ⎯Hematite. HOCKING COUNTY AREA |  | | Book (volume) | | beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: area ridges, slopes, stream beds...Guide for Rock Hounds in the United States CUSTER COUNTY AREA: The November Mine, 1.2 mi. SE of the Needles...of rd. a few yds., outcropRose Quartz. DOUGLAS COUNTY CORSICA, S on US 281 to Armour, area rd. cuts, |  | | Book (volume) | | 600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |  | | Book (volume) | | 600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |  | | Book | | ....243 APPENDIX II: MINERAL SPECIES LISTED BY COUNTY ...............................248 ABOUT THE AUTHORS...Jacobsville Sandstone (early Cambrian), a stream and lake deposit; and many of the youngest (Pennsylvanian)...Counties diabase dikes diabase dikes Portage Lake Volcanics Lower Keweenawan Kallander Creek Formation...-------------------------- Michigamme Formation Fortune Lake Slate u 0N 0 ll:'. w I- 0 ll:'. a.. 0.. ~...Marquette County include the Presque Isle body, the Yellow Dog body in the northern part of the county, and |  | | Book | | land surface, freshwater lake, or shallow sea; into a saline, alkaline lake; or into the ocean. LAND...hyd ,olog,ic system, because th,e water enters the lake and can only leave by evaporation. The zelolite...kaline lakes, are zoned ~ om the edge of the former lake to the center" reflecting the differences in, chemical...pH of the water in the lake (Fig. 2). Ash that falls ,on the shore of the lake is not alt1ered. Ne,ar...the e-dge of the lake w'here the pH ·s near n,eutral, but near th,e center of the lake, potassium-rich | | | Book | | land surface, freshwater lake, or shallow sea; into a saline, alkaline lake; or into the ocean. LAND...hyd ,olog,ic system, because th,e water enters the lake and can only leave by evaporation. The zelolite...kaline lakes, are zoned ~ om the edge of the former lake to the center" reflecting the differences in, chemical...pH of the water in the lake (Fig. 2). Ash that falls ,on the shore of the lake is not alt1ered. Ne,ar...the e-dge of the lake w'here the pH ·s near n,eutral, but near th,e center of the lake, potassium-rich |
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Burlington Bay, Two Harbors, Lake County, Minnesota, USA