 | | Report (issue) | | the Northern Block of the Ishpeming Greenstone Belt, Marquette County, Michigan U.S. GEOLOGICAL SURVEY...Survey, Books and Open-File Reports Section, Federal Center, Box 25425, Denver, CO 80225. Reports released...Geological Survey, Books and Open-File Reports Federal Center, Box 25425 Denver, CO 80225 Subscriptions to periodicals...345MiddlefieldRd. RESTON, Virginia-503 National Center, Rm. 1C402,12201 Sunrise Valley Dr. SALT LAKE CITY...S. Geological Survey, Map Distribution Federal Center, Box 25286 Denver, CO 80225 Residents of Alaska |  | | Report (issue) | | Contribution to Michigan Geology Report — 90-1 PRECAMBRIAN GEOLOGIC SETTING...........................GEOLOGY OF THE PENNY LAKE AREA, MARQUETTE GREENSTONE BELT, MICHIGAN STRATIGRAPHY .....................Geophysics, Michigan Technological University, Houghton, Michigan 49931 Published by the MICHIGAN DEPARTMENT.............................5 VOLCANICS OF SILVER MINE LAKES............................6 Pillowed Basalt.......7 AGE AND ORIGIN OF THE VOLCANICS OF SILVER MINE LAKES ......................................... |  | | Report (issue) | | Analysis of Archean Rocks in the Negaunee Area, Michigan Constraints on Archean Versus Early Proterozoic...25286, MS 306, Federal Center Denver, CO 80225 LAKEWOOD, Colorado-Federal Center, Bldg. 810 Subscriptions...Map Distribution Box 25286, Bldg. 810, Federal Center Denver, CO 80225 Residents of Alaska may order...S. Geological Survey, Earth Science Information Center 101 Twelfth Ave., Box 12 Fairbanks, AK 99701 ANCHORAGE...Middlefield Rd. RESTON, Virginia-USGS National Center, Rm. 1C402, 12201 Sunrise Valley Dr. SALT LAKE |  | | Book | | 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 |  | | Report (issue) | | (CaBSiO4OH) vesicle filling from a basaltic Houghton County lava flow. Small specks of native copper occur...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 |  | | Journal (article/letter/editorial) | | ROPES GOLD MINE, COUNTY, T. M. MICHIGAN. BRODERICK. MARQUETTE • 2 ABSTRACT. The Ropes Mine, situated...situated three and one-half miles northwest of Ishpeming, Michigan, was operated from 1883 until 1897 and produced...The quartz veins carry tetrahedrite, pyrite, chalcopyrite and minor amountsof other sulphides,and the...as there was in the quartz vein nuclei. The old mine was over 800 feet deepand recentdiamonddrilling... T•, Ropes Gold Mine is located{n Section29, T48N-R2?W, Marquette County,Michigan,aboutthree and one-halfmiles |  | | Journal (issue) | | Menlo Park, CA Donald R. Peacor University of Michigan Ann Arbor, Ml George W. Robinson Natl. Museums...R. Kampf Natural History Museum of Los Angeles County George Robinson National Museums of Canada Arthur...Vanadinite from the J. C. Holmes claim, Santa Cruz County, A rizona............................................I l l by G. Novak & W. W. Besse The Michigan gold belt ...........................................reports whicl sometimes contain photos, maps and mine diagrams. This i: valuable information to have preserved |  | | Journal (issue) | | Deposit, Nye County, Nevada Wilson D. Michell 99 Geology of the Ropes Gold Mine, Marquette County, Michigan...MARCH-APRIL, 1945 OXIDATION IN A MOLYBDENITE NYE COUNTY, NEVADA. WILSON No. 2 DEPOSIT, D. MICHELL. ABSTRACT...its oxidation product ferrimolybdite, pyrite, chalcopyrite, and limonitic ocher are associated with abundant...District about 25 miles north of Tonopah in Nye County, Nevada. The deposit is on the west slope of the...molybdenite in the sulphide zone are pyrite and chalcopyrite. P yrite is the most abundant sulphide in the |  | | Book (edition) | | ...................................... MA 1 2 Michigan ••••••••••• •••••••• ••••••••••••••••••••••••••...Guide and Prospecting Permit may NOT prospect or mine on GPAA listed claims or other property reserved... Geological Survey PO Box 25286 Denver Federal Center Denver, CO 80225 KEY TO SYMBOLS: T R Sec SBM MDM...discovery of gold in 1830 in oldAutauga (now Chilton) County along tributaries of Chestnut and Blue Creeks,...Alabama's gold fields occur in a northeast-trending belt (about 100 miles long and 30 to 60 miles wide) in |
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