 | | Journal (article/letter/editorial) | | A weathered skarn-type mineralization in Ivory Coast: The Ity gold deposit Didier BĂ©ziat a,â, Luc Siebenaller...Birimian Ivory Coast Gold mineralization Saprolitic zone Skarn a b s t r a c t Although the Ity deposit...operating mine in Ivory Coast, very few studies exist on this deposit. It is situated in Western Ivory Coast...Abidjan. The mine is presently operated and mined by SMI (SociĂ©tĂ© des mines d'Ity â Society of Ity Mines),...in the Ity area form a cluster of mining operations of various sizes (Flotouo, Zia, Mont Ity), hosted |  | | Journal (article/letter/editorial) | | et al., submitted for publication â this volume; Ity in Cote d'Ivoire: Beziat et al., 2015 â this volume)...shear hosted gold in Liberia (e.g., New Liberty gold mine) and Mauritania (e.g. the 2839 ± 36 Ma Tasiast deposit...pyrrhotite, cubanite, cobaltite, arsenopyrite, magnetite, malachite and gold and hosted in the 30 m wide...ore bodies. These deposits are associated to magnetite-rich endo-and exoskarns derived from dolomitic...Burkina Faso, where FeâVâTi bearing veins (e.g., magnetite veins of the Tin Edia deposit) crosscut Paleoproterozoic |  | | Journal (article/letter/editorial) | | for homogeneous crustal thickening (Man Rise, Ivory Coast) P . P I T R A , 1 A . N . K O U A M E L A N...area (Archean part of the Man Rise, western Ivory Coast) displays a primary assemblage (M1) containing...(bytownite), green pargasitic amphibole, ilmenite and magnetite (M2). Multiequilibrium thermobarometric calculations...thrust-dominated tectonics. In Western Africa, in the Ivory Coast (Camil, 1981, 1984) and Sierra Leone (Rollinson...reported from the Man Rise. In the SW part of Ivory Coast, the 41 42 P. PITRA ET AL. Archean basement |  | Gunn, A.G., Dorbor, J.K., Mankelow, J.M., Lusty, P.A.J., Deady, E.A., Shaw, R.A., Goodenough, K.M. (2018) A review of the mineral potential of Liberia. Ore Geology Reviews, 101. 413-431 doi:10.1016/j.oregeorev.2018.07.021 | Journal (article/letter/editorial) | | of iron ore is currently restricted to a single mine, Yekepa, in the Nimba Range. Other important deposits...Niger, Burkina Faso and CĂŽte dâIvoire (Figure 2). At Ity in CĂŽte dâIvoire, located about 25 km from the Liberian...Africa. One of the areas studied was the Toulepleu-Ity area in Liberia and western CĂŽte dâIvoire, running...alteration assemblages may include phlogopite, talc, magnetite, hematite, iron sulfide, tourmaline and tremolite...are bleached as a result of the destruction of magnetite. Geochemical analysis of drillcore has established |  | Dabo, Moussa, AĂŻfa, Tahar, Miyouna, TimothĂ©e, Abdoul Diallo, Diery (2016) Gold mineralization paragenesis to tectonic structures in the Birimian of the eastern DialĂ©-DalĂ©ma Supergroup, KĂ©dougou-KĂ©niĂ©ba Inlier, Senegal, West African Craton. International Geology Review, 58 (7) 807-825 doi:10.1080/00206814.2015.1123121 | Journal (article/letter/editorial) | | marble). Sericite, tourmaline, haematite, and magnetite are common in both V2 and V3 assemblages. The...the eastern Man shield (Guinea, southern Mali, Ivory Coast, Ghana, Burkina Faso, southwestern Niger, and...Birimian provinces of the WAC, particularly in the Ivory Coast (Ledru et al. 1988; Pitra et al. 2010), Burkina...hosted in volcanic or plutonic rocks (YaourĂ©, Ivory coast; Syama, Mali); Type 3: gold-bearing conglomerates...eluvial placers; Type 7: lateritic deposits (Ity, Ivory coast). Two deposit types are distinguished in the |  | | Journal (issue) | | Volume 34,No.2 February 1972 State of Oregon Department of Geology and Mineral Industries 1069 State...are found intermittently along the entire western coast of the United States. Some of the best exposures...upper Eocene Coaledo Formation crops out along the coast south of Coos Bay from Sunset Bay State Park to...amphiboles 12.6 Clear garnet 9.3 Hypersthene 5.5 Magnetite 5.2 Pink garnet 3.9 Epidote 3.7 Biotite 1.3 Minor...tes Percent Mineral Blue-green hornblende 21.9 Magnetite 17.2 Brown hornblende 16.0 14.0 Other amphiboles |  | | Journal (article/letter/editorial) | | deposits in the belt, the 409 ~30 Moz Bibiani gold mine, contains complex quartz vein systems with disseminated...intrusions. Gold mineralization in the Kalana Gold Mine is predominantly hosted by Page 20 of 87 metasediments...An example of a skarn-type association is the Ity mine located in Cote dâIvoire, which 475 is hosted...Birimian meta-carbonates, adjacent to the ToulĂ©pleu-Ity tonalite 478 (approx. 2.10 Ga (Pb-Pb); Kouamelan...in carbonate rocks 508 with the presence of magnetite and concentric zonation around a granodiorite |  | | Journal (article/letter/editorial) | | formerly Assistant professor of Geo- RADIOACTIV ITY AND MINERAL DEPOSITS 817 had previously found...; feldspar-100 ; pyroxene-1650; olivine-800; magnetite concentrate-480O; expected helium age-600. Excesshelium...minerals. In the case of the Yellowknife diabase the magnetite, associatedwith the titaniferous minerals, ilmenite...have found concordant results with a seriesof magnetite samples (Hurley and Goodman, 1943). Loss of helium...localization of the radioactive elements RADIOACTIV ITY AND M I NERAL DEPOSITS 819 in minor accessoryminerals |  | | Journal (issue) | | susceptibility. Palladium has a higher magnetic susceptibil ity than any other non-ferromagnetic element so far determined...magnetic separation of the other minerals, such as magnetite, chromite, and ilmenite. Native platinum cannot...immiscible liquid injection. Deposits at the Frood mine at Sudbury, Ontario, may have formed in this manner...associated with olivine, chromite, pyroxene, magnetite, and nickel. Platinum, as sperryl ite, is present...source rock. Platinum was located in the Highland mine, about 12 miles south of Gold Hill, in the Gold |  | | Report (issue) | | of CURRY COUNTY,OREGON 1977 STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES RALPH S MASON.... .. . âą "" .. ïżœ- .l STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES 1069 State...Herbert G. Schlicker, and Jerry J. Gray Oregon Department of Geology and Mineral Industries Conducted...purposes; and (2) to add to t he data base of the Department of Geol ogy and M inera l I nd ustrie s . T hi...reviewed the compl eted map . N orm Peterson , Department of Geo l ogy a nd M i nera l I nd ustries , Grants |  | Lawrence, D.M., Allibone, A.H., Chang, Z., Meffre, S., Lambert-Smith, J.S., Treloar, P.J. (2017) The Tongon Au Deposit, Northern CĂŽte dâIvoire: An Example of Paleoproterozoic Au Skarn MineralizationâŒ. Economic Geology, 112 (7) 1571-1593 doi:10.5382/econgeo.2017.4522 | Journal (article/letter/editorial) | | to 15% hornblende, and 5 to 10% biotite, with magnetite the dominant opaque mineral (Fig. 4H). Amphiboles...10% amphibole, 1 to 5% melilite, and 2% Ti-rich magnetite. Phenocrysts include biotite, lesser pargasite...partly replaced by talc, serpentine, calcite, magnetite, and anhydrite during stage 3 alteration. Stage...albite + pumpellyite + serpentine + calcite + magnetite + anhydrite Light green, fine- to moderate-grained...of pyrrhotite over pyrite; and (5) the lack of magnetite and hematite. Löllingite is frequently observed |  | | Journal (issue) | | mineralogy is increasing tremendously. Rocks and Mine rals has Among some of the many questions submitted...What should that price be? Your guess is as good as mine. I have bought agate at . 10 per lb. and lost money...a grocery store. We found the remains of the old mine but all the minerals collected were a few pieces...danburite. The oldest man in the neighborhood said the mine had been opened up for nickel. I once saw a specimen...in my minera!ogical library, I found the loca'. ity in question to be 5 miles north of a certain village |  | | Journal (article/letter/editorial) | | wishes to ob tain specimens from this famous local ity. Magnet Cove lies in southwestcentral Arkansas about...have been obtained. Vesuvianite, dysanalyte, magnetite crystals and carbonate-apatite are some of the...collectors. Many minerals reported from this local ity are present only in microscopic form or are materials...Titanium Mine Molybdenite Prospect Brookite Prospect MAGNET 5. 6. 7. 8. Igneous Rocks Magnetite Area...E M B E R 1976 in the vicinity of the titanium mine. Specimens showing well developed crystal faces |  | Mauche, Renïżœe, Faure, Gunter, Jones, Lois M., Hoefs, Jochen (1989) Anomalous isotopic compositions of Sr, Ar and O in the Mesozoic diabase dikes of Liberia, West Africa. Contributions to Mineralogy and Petrology, 101 (1) 12-18 doi:10.1007/bf00387197 | Journal (article/letter/editorial) | | Faure 1, Lois M. Jones 2, and Jochen Hoefs 3 1 Department of Geology and Mineralogy, The Ohio State University...43210, USA 2 Petroleum Research and Development Department, Conoco Inc., Ponca City, OK 74603, USA 3 Geochemisches...sills, primarily in Liberia, Sierra Leone and Ivory Coast. The dikes strike N W - S E and were probably...Paleozoic Paynesville Sandstone which occurs along the coast of Liberia (White 1972). The Precambrian rocks have...samples (LD7 and LD22). Opaques consisting of magnetite and ilmenite range in abundance from less than |  | | Journal (issue) | | Discovery of Pink Tourn1aline at the Cryo-Genie Mine, San Diego County, California Kenneth L. Gochenour...of specimen g rade was found at the C ryo-Genie mine near Warner Springs in northern San Diego County...the Fig. 1 Elbaite, recent find at the Cryo-Genie Mine; from Gochenour's display at the TGMS Show. Conti...as the Province ake Quarry or just Hams or Weeks Mine, pegmatite, or quarry) loc~ted abou_t si x mi les...Hams-Weeks Mine, Wakefield, New Hampshire, photo by the author. Fig. 1 Zircon, micro, Hams-Weeks Mine, Wakefield |  | | Journal (issue) | | - BIN 11 Portland, Oregon STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES Head Office:...- - - - - '* ** Geologist, State of Oregon Department of Geology and Mineral Industries. *** See note...bibliography on page 15. ------., 12 STATE DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES vol. 19 no...M. cf. M. mexicana Cushman var. A 14 STATE DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES vol. 19 no...the following statement: liThe entire area of the Coast Range between the Olympic Mountains on the north |  | | Journal (article/letter/editorial) | | southern England Paul Montgomery âI Dqurtmmt âI Department a-*,Ernie A. Hailwood a-â, Andy S. Gale b,2...Cromwell Road, London SW7 5BD. UK â Geolog!, Department. University College London. Gower Street, London...mineral in these sediments is magnetite, but mixtures of hematite and magnetite occur also. SEM and TEM studies...magnetic mineral extracts indicate the presence of magnetite and hematite, preserved as inclusions within silicate...silicate grains, together with abundant bacterial magnetite preserved as individual grains and chains in some |  | | Journal (issue) | | collected the first Miocene fossils found on the west coast of North America from the "beach near Astoria" (Dono...type section for the marine Miocene of the West Coast. Throughout the intervening 120 years, geologists...stratigraphic sections from other locations on the Pacific Coast with the section exposed at Astoria. The circumstance...collection of fossils is preserved at the Univer~ity of Oregon in Eugene and they are labeled, unfortunately...Forest Grove and made the arduous trip over the Coast Range by the old Military Trail.. In the report |  | | Book | | was m e r e l y p a r t o f t h e waste o f t h e mine. W h a t t h e y needed was h i g h grade ore o...gemstones. Photograph by Tennessee Conservation Department. Several varieties o f cutting material are...Washington D.C. area visit Virginia's noted Rutherford Mine. Photograph by Dr. Virginia Lee Blackford. ical...Field trippers visited the well known old Rutherford mine in Amelia County, Virginia, and found bright spessartine...Several known minerals were never found in gem qual ity until explorations of the Franklin area were made |  | | Journal (issue) | | various âą kinds, impure crystalline limestones, and magnetite thickly spangled with flakes of graphite and traces...Jump Mountain. At the Howell iron mine outcrop, just below the copper mine, con siderable talcose schist...hill below the outcrops of iron ore at the Howell mine, but we had no light to explore this. The tunnel...level, or summit, we passed an excavation on a magnetite outcrop. We traversed the southwest end * of the...contenta was noticed, except possibly at the Stinson mine. The marble quarry on the Hope-Danville road, seemed |  | | Journal (issue) | | Binghamton, N.Y. ................ 6 Memories of Mine HIii ............. 7 Historical Mining Certificates...from combinations of natural mate rials, such as ivory, mother-of-pearl, coconuts, glass and china. Medals... whose curios- JANUARY-FEBRUARY 1991 MATRIX ity far outstripped their monetary ogy contained in his...form, hard ness, friability, smoothness, solubil ity, fusibility, brittleness, cleavage, and combustibility...lection. The dedicatory epistle and p reface provide a mine of information regard ing Gesner's intentions in |  | | Journal (issue) | | unique capabilit ies, geologists have a responsibil ity to aid man to manage and protect his physical environment...depostis, especiall y heavy metals, in the Atl ant ic Coast al Plain and eastern Triassic basins. JOH N SLA...Design of Highway Cu ts in Rock: A Slope St abi l ity Study on Interstate Routes 279 and 79 nea r Pittsburgh...RICHARD HOWE and DAV ID REIDENOUR, Pennsy lva n ia Department o f Highways. Engineering Properties of Shales...Geo-Engineering Laborat ories, Inc. The Feasibil ity of Subsurface Li qu id Waste Disposa l in Pennsylvania |  | | Journal (article/letter/editorial) | | Abbott , Trevor A. Jackson & Peter W. Scott c a Department of Geology , Appalachian State University , Boone...Boone, North Carolina, 28608 b Department of Geography and Geology , University of the West Indies ...Jamaica R I C H A R D N. A B B O T T , J R . , Department of Geology, Appalachian State University, Boone...Carolina 28608 T R E V O R A. J A C K S O N , Department of Geography and Geology, University of the West...appearance of serpentine, micrometer-scale grains of magnetite crystallized on the surfaces of fractures. This |  | Lemoine, S., Tempier, P., Bassot, J. P., Caen-Vachette, M., Vialette, Y., TourĂ©, S., Wenmenga, U. (1990) The Burkinian orogenic cycle, precursor of the Eburnian orogeny in West Africa. Geological Journal, 25 (2) 171-188 doi:10.1002/gj.3350250208 | Journal (article/letter/editorial) | | and locally mesozonal mica schists known in Ivory Coast as the âKounoukou formationâ which has been dated...geochronological data derived from biotites from the Ivory Coast used the term Eburnian to denote granites linked...HISTORICAL OVERVIEW Za Ivory Coust Arnould, M. (1961) in his study of the northeast Ivory Coast and its border...his synthesis drawn from ten years work on the Ivory Coast. He distinguishes (a) a volcanic and sedimentary...existence of a Tarkwaian molasse sequence in the Ivory Coast. Bard (1974), on the one hand, rejected the accepted |  | | Report (issue) | | 14 1. 2. 3. 4. 5. Asbestos ore Lead ore-Balmat Mine. N.Y. Chromit~-chromium ore. Wash. Zinc ore-Friedensville...PRINTING OFFICE, WASHINGTON 1976 UNITED STATES DEPARTMENT OF THE INTERIOR THOMAS S. KLEPPE, Secretary ...not yet discovered or not presently profitable to mine. The mining of mineral deposits, once discovered...the presence of intergrowths with hematite and magnetite and to solid solution with hematite (low values)...rock Ti02 in each mineral Olivine Serpentine Magnetite 0.134 .073 .00 .017 .080 47.4 22.2 16.3 11.0 |
|
