 | | Journal (article/letter/editorial) | | APRIL 30, 1935 DIFFERENTIATION IN LAVAS OF THE MICHIGAN KEWEENAWAN * B Y T . M . BBO DEBICK (Bead before................................... 505 Keweenawan flow, Wisconsin...................................................................... 506 Cape Spencer flow, N ova Scotia...................................................................... 509 The Greenstone flow .......................................................................... 510 The Kearsarge flow................................................ |  | | Journal (article/letter/editorial) | | GEOI.OGIC M A P O F SOME PEGMATITIC LAVA FLOWS, MICHIGAN C O P P E R D I S T R I C T Downloaded from https://pubs...SERIES AND THE ORIGIN OF THE COPPER DEPOSITS OF MICHIGAN By HENRY R. CORNWALL ABSTRACT Five lava flows...flows in the Keweenawan series of the Michigan copper district have been studied and chemical analyses made...comparison of the types of rocks found within a single flow with the types of flows that make up the lava series;...approximated by differentiation products of the Greenstone flow, indicating that all the flows could have been |  | | Report (issue) | | (CaBSiO4OH) vesicle filling from a basaltic Houghton County lava flow. Small specks of native copper occur as...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) | | 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...15 Minong Flow ------------------------------------------------ 15 Amygdaloid Island Flow --------------Ā·-------------...------- C18 Greenstone Flow-------------------------------------Ā·--- 19 Hill Point Flow ------------...-------------------------------------------- 19 Washington Island Flow---------------------------- 20 Sedimentary rocks |  | | 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 (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....................................by C. J. Stefano The Cliff Mine, Keweenaw County, Michigan.............................................Stefano & P. Persson The Central Mine, Keweenaw County, Michigan......................................53 by |  | | Journal (article/letter/editorial) | | microscopically in slides from the basal part of another flow. Bartrum records calcite veins from the type area...that the lime released in amphibolization forms anorthite in the plagioclase. In the present case also the...continuously reacted upon with the elimination of anorthite. Some of the calcium so released may have been...transport of the reacting substances; but in a lava flow this function of the "buffer" may be discharged...data, that in the central zone of the Greenstone flow of the Michigan Keweenawan a magma rich in volatiles |  | | Report (issue) | | Marquette and Sands Quadrangles Marquette County Michigan GEOLOGICAL SURVEY PROFESSIONAL Prepared...cooperation with the Geological Survey Division of the Michigan Department of Conservation PAPER 397 Geology...Marquette and Sands Quadrangles Marquette County Michigan By JACOB E. GAIR and ROBERT E. THADEN GEOLOGICAL...cooperation with the Geological Survey Division of the Michigan Department of Conservation UNITED STATES GOVERNMENT...map and sections of the Marquette quadrangle, Michigan. Geologic map and sections of the Sands quadrangle |  | | Journal (article/letter/editorial) | | low-grade metamorphic rocks, Keweenaw Peninsula Michigan, USA Edward Hansen a,ā, Jesse Reimink a, Daniel Harlov...Hope College, 35 E 12th Street, Holland, Michigan 49423 USA Section 3.3 Chemistry and Physics of Earth...rhyolite clasts from the Keweenaw Peninsula, Michigan, USA which were metamorphosed to the prehniteā pumpellyite...a conglomerate from the Keweenaw Peninsula, Michigan, USA metamorphosed to the prehniteāpumpellyite-facies...Lake Volcanics of the Keweenaw Peninsula in Michigan, USA (Fig. 1a), are a thick (2500 to 5000 m) sequence |  | Hamaguchi, Hiroshi, Kuroda, Rokuro, Okuma, Naoki, Kawabuchi, Kazuaki, Mitsubayashi, Tetzuya, Hosohara, Kyoichi (1964) The geochemistry of tin. Geochimica et Cosmochimica Acta, 28 (7) 1039-1053 doi:10.1016/0016-7037(64)90059-6 | Journal (article/letter/editorial) | | made by the use of a conventional proportional gas flow counter. Air dried rocks, clays or biological materials...of 6. U.S.A. Basalt. Greenstone flow, Michigan Basalt. Kearsarge flow, Michigan Basaltic rocks, composite...composite of 8. Michigan Olivine basalts, composite of 7, Oregon Basalt. Xatsue. Shimane Basalt. Ajiro, Shizuoka...of tin for a series of plagioclases: Sn(ppm) Anorthite (2 samples) Olipoclase (1 sample) A1bit.e (5 samples) |  | | Journal (article/letter/editorial) | | 7. Location Ham-Brule Kawishiwi Skaergaard * Greenstone? Co0 in minerals (p.p.m.) Olivine Aver. 315...norites 26 Sorites, averagt: Chill zoncb, Greonstone flow 4 Sorituu, Ontario and MITCHELL &bIld &fITGHELL...pyroxenes from the Skaergaard intrusion and Greenstone flow. Titanium shows no noticeable t,rends in any...those of the Skaergaard intrusion and the Greenstone flow in their zirconium content. The Kawishiwi traverse...Ham-Brule Kawishiwi 41 36 10-100 5-180 Skaergaard* Greenstone? 53 410 305 383 630 trece 36-71 Range 100-780 |  | | Journal (article/letter/editorial) | | of the Keweenawan Tholeiitic Lavas of Northern Michigan, U.S.A. by WAYNE T. JOLLY1 and RAYMOND E. SMITH...H E Keweenaw Peninsula of the Superior region, Michigan, contains one of the classic flood basalt sequences...Lava Series of the Keweenaw Peninsula, northern Michigan, is composed of over 5000 m of tholeiitic lava...region. During burial the amygdular tops of each flow acted as channelways for migrating fluids during...progressive sequence of secondary phases within the flow tops. In the upper part of the stratigraphic section |  | | Journal (article/letter/editorial) | | plagioclase-rich zone, 7ā74 ft belom top of Greenstone Flow, Michigan (CORNWALL and ROSE JR., 1967, Table 2)...strontium analogue of diopside, although a strontium anorthite existed. ~AS~~~TO~ (3) The titanomagnetites Titanomagnetite...basalt (k-376), 501 feet below top of Greenstone flow, Michigan (CORNWALL and ROSE JR., 1957, Table 2)...JR. (1957) Minor elements in Keeweenawan lavas, Michigan. Geochim. et Comwchirn. Acta 12, 209-224. DEGENHARDT |  | | Journal (article/letter/editorial) | | by Cornwall (1951, pp. 157-8) for the Greenstone flow of Michigan, although the intensity of the variation...occasional thin outermost zones of even lower anorthite content. The normative plagioclase calculated...normative constituents: (1) the most refractory, i.e. anorthite, wollastonite, enstatite, and forsterite; (2)...albite ratio of the melt for the two-component anorthite-albite system (Bowen, 1913) with which the plagioclase |  | | Journal (article/letter/editorial) | | by Cornwall (1951, pp. 157-8) for the Greenstone flow of Michigan, although the intensity of the variation...occasional thin outermost zones of even lower anorthite content. The normative plagioclase calculated...normative constituents: (1) the most refractory, i.e. anorthite, wollastonite, enstatite, and forsterite; (2)...albite ratio of the melt for the two-component anorthite-albite system (Bowen, 1913) with which the plagioclase |  | | Report (issue) | | Photomicrograph showing contact of spilitic greenstone flow and argillitic chert, Scott Canyon Formation______...of interbedded shale and chert with a little greenstone estimated to aggregate more than 3,000 feet in...consists Ā·of interbedded dark shale, chert, and some greenstone (altered andesite), and pyroclastic rocks aggregating...the town of Battle Mountain and lies in Humboldt County (fig. 1). TheĀ· Battle Mountain mining district...At Battle Mountain some wells yielded an artesian flow, but as water use increased through pumping, the |  | | Report (volume) | | California. Economic geology. Chromite, El Dorado County: Cater, F. W., Jr. Healdsburg quadrangle: Gealey...W. K. Mercur~Ā·, New Almaden mines, Santa Clara County: Bailey, E. H. San Francisco Bay counties: Bowen...Bowen, 0. E , Jr., 3 Mineral resources, Fresno County: Logan, C. A. Geologic maps. Bitterwater Creā¬k area:...Investigations. Lexington, Ky. Los Angeles County Museum Quart.-Los Angeles County Museum Quarterly. Los Angeles....Bull.; County Rept.--Marylan(l Department of Geology, Mines, and Water Resources Bulletin; County Reports |  | | Report (issue) | | Thayer (1963b), layering in these rocks formed due to flow differentiation; primary structures were largely...except for the chroseparate massifs by diapiric flow in the upper mantle mitite layers, which contain...parallel to the dike walls; this texture may reflect flow The peridotite of the ultramafic member is general-...Geologic map of the Mount Vernon quadrangle, Grant County, Oregon: U.S. Geological Survey Geologic Quadrangle...the Mineral-Iron Mountain District, Washington County, Idaho, and of a metallized zone in western Idaho |  | | Book (edition) | | One Liberty Plaza, 20th Floor, New York, NY 10006, USA 477 Williamstown Road, Port Melbourne, VIC 3207,...Simple Ternary Basalt System: DiopsideāAlbiteāAnorthite 8.9.9 More Complex Phase Diagrams 8.10 Rates of...Composite Volcanoes, Domes, Calderas, Ash-fall and Ash-flow Deposits 10.3 International Union of Geological...6.1 Laminar and Turbulent Flow 12.6.2 Movement of Particles by Fluid Flow 12.6.3 Movement of Particles...an entire year. Despite its low value, this heat flow is sufficient to make the Earth a dynamic planet |  | | Report (volume) | | described. Div. Mines, 1; Jenkins, O. P., Choctaw County, Highway 17 area: 3. Toulmin, L. D., Jr., 3. Minor:...analysis: KelH. D., 5. ler, W. D., 3. Talladega County, hematiteOklahoma, potash agstone, granite magnetite...ground water: Powham, C. E. ell, W. J., 4. Marengo County: Newton, J. G., 1. Core-drilling program, ChattanooMica:...J.,4. Excursion, Tertiary type-localiMontgomery County: Reade, ties: Rainwater, E. H. , 1. H. L. , Jr...Harris, H. B. trolled: Braunstein, J., 3. Escambia County: Cagle, J. W. ,Jr. Pollard field: Jones, W. B. |  | | Book | | Hydrothermal Ore Deposits. Donald E. White 392 Fluid Flow and Genesis of Hydrothermal Ore Deposits. L. M....lava flows and sheets in thick successions of greenstone-type basalts. Kambalda-type deposits appear to...volcanic assemblages are well preserved in the greenstone belts, most of which range in age from about...banded iron-formations are present in nearly all greenstone belts, but volcanogenic massive sulfide deposits...rocks which close an eruptive cycle. A typical greenstone volcanic pile shows repeated, cyclical mafic |  | | Book | | Time- and Strata-Bound Features of the Michigan Copper Deposits (USA). G.C. Amstutz. With 13 Figures ......BRGM (1964) McElhinning, M.W.: The South Pacific. USA, 1965 Needham, J.: History of Science in China, Vol...biological cell and the environment is a membrane. The flow of metal ions in and out of a cell is regulated...Callender, E.: Minor element geochemistry of Lake Michigan ferromanganese nodules. Earth Planet. Sci. Lett...siliceous gel in the manner proposed by Elliston (1968). Flow folding is common in this formation and the various |
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