 | | Journal (article/letter/editorial) | | iron-formations are enriched in magnetite, martite and hematite rarely goethite and SiO2 mainly in the form of...the oxide facies comprising the magnetite and hematite subfacies. In the magnetite-free silicate facies...magnetite in the form of porphyroblasts, whereas hematite is mainly of secondary origin due to the formation...either from the replacement of magnetite (not of hematite) or from Fe-rich descending solutions. The analytical...magnetite) and the recrystallization of martite into hematite, field IIa (magnetite – silicate facies) grades |  | | Report (issue) | | BIBLIOGRAPHY OF THE GEOLOGY AND'MINERAL INDUSTRY OF LIBERIA AND ADJACENT COUNTRIES Donald H. Joinso Richard... BIBLIOGRAPHY OF THE GEOLOGY; ERAL INDUSTRY t! i OF LIBERIA AND ADJACENT COUNTRIES SUPPLEMEijiij i Donald... BIBLIOGRAPHY OF THE GEOLOG1T ANI3 JJWjNERAL INDUSTRY OF LIBERIA AND ADJACEN? COtJ$rTRIES ' - , ' '" ; *' ...^Ge^ogicaJ Survey, sponsored by the Government of Liberia and the IT.' S. AJshcy I 'i f for International...economies involving References to mining, metallurgy, Liberia have been included, as have pa>ers'd lir g with |  | 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) | | Manuscript A Review of the Mineral Potential of Liberia A.G. Gunn, J.K. Dorbor, J.M. Mankelow, P.A.J. Lusty...Goodenough, A Review of the Mineral Potential of Liberia, Ore Geology Reviews (2018), doi: https://doi.org/...pertain. A Review of the Mineral Potential of Liberia A.G. Gunn a*, J.K. Dorbor b, J.M. Mankelow a, P...Edinburgh, EH14 4AP, UK. Abstract The Republic of Liberia in West Africa is underlain mostly by Precambrian...and in West Africa in particular, the geology of Liberia is favourable for the occurrence of deposits of |  | | Report (volume) | | Iron-Formation and Associated Rocks in the Wologizi Range, Liberia By RICHARD W. WHITE GEOLOGICAL SURVEY BULLETIN...Mines, under the auspices of the Government of Liberia and the Agency for International Development, U...-------------------------------Metamorphism in other areas of Liberia ________________________ _ Retrogressive metam...Range _____________________ In pocket Index map of Liberia, showing area of plate 1 and figure 7 _________...Selected chemical analyses of iron--formation from Liberia ___________ _ Semiquantitative spectrographic analyses |  | | Report (issue) | | it a ,s GEOLOGY OF THE MONROVIA QUADRANGLE, LIBERIA 2 U. S. Geological Survey dJ OPEN FILE REPORT...Prepared under the auspices of the Government of Liberia and the Agency for International Development U...REFERENCES 18 GEOLOGY OF THE MONROVIA QUADRANGLE, LIBERIA By Charles H. Thorman INTRODUCTION As part of...Government of Liberia and the Agency for International Development, U. S. Department of State, Liberia was mapped...many laterite roads, is better than in most of Liberia. Thick sanrolite and laterite make fresh bedrock |  | | Journal (article/letter/editorial) | | of Globe, Ariz."—on label. Globe, in south Gila County, is in central Arizona. ARKANSAS —• "I am sending...terminated. North Little Rock, in central Pulaski County, is in central Arkansas. CONNECTICUT—Mrs. Cecil...Conn." •—on label. Newington, in central Hartford County, is in central Connecticut. MAINE—A few months...western York County, is in S/W Maine. MINNESOTA—"I am sending you a specimen from the Jessie Mine near here...southern Itasca County, is in northern Minnesota. NEW HAMPSHIRE—"Recently while at a mine in Westmoreland |  | | Journal (article/letter/editorial) | | Formationand SupergeneIron Ores of the Goe Range Area, Liberia JoH• W. BERGE Abstract Two parallel bedsof metamorphosed...Goe Range area of the central coastalregion of Liberia are described. These bedsconsist of itabirites...prospects includingBomi Hills, and Nimba,and the Bie, Bong and Goe Rangeshavebeendescribed(Berge, 1966a, 1966b...geochemicalinformation is confinedto unpublishedcompanyreports. Liberia has becomea major world supplierof high grade iron...theareaconsists of gently 947 FIG. 1. Map of Liberia showing position of the Goe Range Area. 948 |  | Sharpe, Ryan, Fayek, Mostafa, Quirt, David, Jefferson, Charlie W. (2015) Geochronology and Genesis of the Bong Uranium Deposit, Thelon Basin, Nunavut, Canada. Economic Geology, 110 (7) 1759-1777 doi:10.2113/econgeo.110.7.1759 | Journal (article/letter/editorial) | | pp. 1759–1777 Geochronology and Genesis of the Bong Uranium Deposit, Thelon Basin, Nunavut, Canada Ryan...deposits hosted exclusively in basement rocks. The Bong deposit is hosted dominantly by Neoarchean metagraywacke...five-phase metallogenetic model is proposed for the Bong deposit, with three stages of uraninite identified...Associated alteration minerals include chlorite, hematite, and illite. Both the mineralized and alteration...Ar-Ar plateau age of 1124 ± 9 Ma from illite in the Bong deposit and U-Pb ages of 1293 ± 6 and 1187 ± 19 |  | | Report (issue) | | BIBLIOGRAPHY OF THE GEOLOGY AND MINERAL INDUSTRY OF LIBERIA AND ADJACENT COUNTRIES by Donald H. Johnson APR...Geological Survey standards or nomenclature Monrovia, Liberia January 1969 BIBLIOGRAPHY BIBLIOGRAPHY CF THE...THE GEOLOGY AND MINERAL INDUSTRY CF LIBERIA AND ADJACENT COUNTRIES by Donald H. Johnson and Richard "...pertaining to the geology and mineral industry'of Liberia, and to indicate those that are held by the library...program, a combined effort of the Government of Liberia and the United'States Agency for International |  | Riegler, T., Lescuyer, J.-L., Wollenberg, P., Quirt, D., Beaufort, D. (2014) ALTERATION RELATED TO URANIUM DEPOSITS IN THE KIGGAVIK-ANDREW LAKE STRUCTURAL TREND, NUNAVUT, CANADA: NEW INSIGHTS FROM PETROGRAPHY AND CLAY MINERALOGY. The Canadian Mineralogist, 52 (1) 27-45 doi:10.3749/canmin.52.1.27 | Journal (article/letter/editorial) | | paragenesis is composed of illite ± sudoite ± hematite ± aluminum phosphate sulfate minerals (APS). Alteration...last point is fundamental to the occurrence of hematite in alteration zones and points out the potential...mineralogist Along the trend toward the southwest are the Bong prospect and the End and Andrew deposits (Fig. 1)...halo centered on faults, itself surrounded by a hematite pervasive alteration extending over tens of meters...on both altered rocks in mineralized zones (i.e., Bong prospect, End deposit, and Andrew Lake deposit) | | | Report (issue) | | u tf;;;;o o) l'.t2,::i- "t i) REPUBLIC OF LIBERIA MINISTRY OF LANDS AND MINES UNITED STATES DEPARTMENT...KILOMETERS GEOLOGIC MAP OF THE MONROVIA QUADRANGLE, LIBERIA by C.H. Thorman PREPARED BY THE U .S. GEOLOGICAL...UNDER THE JOINT SPONSORSHIP OF THE GOVERNMENT OF LIBERIA AND THE AGENCY FOR !NTERNATJONAL DEVELOPMENT. U...muscoviteand biotite-bcaring leucocratic gneiss in the Bong Range Gr;inUic r,nci:.s--lif,ht - colo r cd, mediui;...adjacent units, especially on tne· south side ot the Bong. Ranl;e near tne qu,1 dr:1ngle Doundary; west. of |  | | Report (issue) | | Geophysical Surveys of Liberia . With Tectonic and Geologic Interpretations GEOLOGICAL SURVEY PROFESSIONAL...Survey under the auspices of the Government of Liberia and the Agency fo?" International Development)...of State PAPER 810 Geophysical Surveys of Liberia With Tectonic and Geologic Interpretations By JOHN...Survey under the auspices of the Government of Liberia and the Agency for International Development) U... 2. 3. 4. 5-10. Generalized elevation map of Liberia ---------------------------------------------- |  | | Journal (article/letter/editorial) | | ancient nucleus of early Archean cratonie rocks in Liberia and eastern Sierra-Leone. They consist of a complex...greenstones and schists. In the Nimba Ranges of Liberia, the gneisses are dominantly tonalitic to granitic...The Kasila Group which extends along a belt from Liberia through Sierra Leone into Guinea consists of high-grade...within the Archean craton in eastern Sierra Leone, Liberia and Guinea. These include the Kambui, Nimini, Sula-Kangari...the West African craton in eastern Sierra Leone, Liberia, Guinea and Ivory Coast is however composed of |  | | Report (issue) | | REPORT Liberian Investigations ' TECTONIC MAP-OF LIBERIA BASED ON GEOPHYSICAL AND GEOLOGICAL SURVEYS '...Figure 1.--Generalized equal elevation map of Liberia.......... 2. Histogram showing relative amount..................... 15 4. Aeromagnetic map of Bong Range region............... 21 5. Aeromagnetic..... 26 10. Total-count gamma radiation map of Bong Range area.. 27 11. Total-count gamma radiation............ 42 15 . Free -air anomaly map of Liberia ................. 47 16. Suggested crustal section |  | | Journal (article/letter/editorial) | | (Kiggavik, End, and Andrew) and most of the prospects (Bong, Granite, and Sleek) are exclusively located in...Altered and/or mineralized metagraywacke from the Bong prospect in the BG42 and BG49 drillholes (DDH) Unaltered...Lake Judge Sisson Lake End Grid Bong Bong Bong Bong Bong Bong Bong Bong Outcrop Drillhole Drillhole Outcrop...9 263 Drillhole nomenclature (DDH_sample#), BG: Bong; End: End Grid and SW: Andrew; DFC: distance from...can also be associated with secondary quartz and hematite as fracture-controlled fill. Locally, coarser-grained |  | | Journal (article/letter/editorial) | | rather, they are all basement-hosted. Here, the Bong and End deposits hosted by Archean paragneiss and...),18,484 contains Mesoproterozoic End, operated Bong, Andrew Lake, and Kiggavik (formerly AREVA Resources...Canada Inc.), contains the Mesoproterozoic End, Bong, Andrew Lake, unconformity-related U deposits, and...with Snow Island Suite epiclastic material (End, Bong, Andrew Lake, and Kiggavik deposits [33,39,40],...host-rock alteration comprising illite ± sudoite ± hematite ± aluminum phosphates sulfates (APS), as well |  | Grare, Alexis, Lacombe, Olivier, Mercadier, Julien, Benedicto, Antonio, Guilcher, Marie, Trave, Anna, Ledru, Patrick, Robbins, John (2018) Fault Zone Evolution and Development of a Structural and Hydrological Barrier: The Quartz Breccia in the Kiggavik Area (Nunavut, Canada) and Its Control on Uranium Mineralization. Minerals, 8 (8) 319 doi:10.3390/min8080319 | Journal (article/letter/editorial) | | Contact prospect, but also from End, Andrew Lake and Bong 3.2. Quartz Microscopic Characterisation by Optical...Contact prospect, but also from End, Andrew Lake and Bong Minerals 2018, 8, 319 6 of 28 deposits. All...NWoratgive Contact, N175, dip to that the isW at Bong, are visible, minor quartz veins are more randomly...to the(<30 NW at Contact, N175, dip to the W at Bong, FigureN50 3 summarizes collected drill holes at...definedobservations by disseminated micro-grains of pervasive hematite (aggregates of micrometric grains) and with Microscopic |  | | Journal (article/letter/editorial) | | fiableas cherryor chert-poor. Few iron formations hematite" (14); formation, modified by "iron," of anyagearedevoidof..."ore-,.... iron," or "iron-bearing"(3); hematite-seam(1); and hematite-layer(1). Previouslyused namesfor the...84*, 114 46, 63*, 135 160', 186 14, 90, 189' MECS Bong Range Middle PrecambrianW 55*, 77, 171 • Acronymsfor...Mississippian Tynagh MECS-IF minerals include hematite, magnetite, greenalite, (Schultz, 1966). Bandsrich...ferriferous minerals of SCOS- IF ironstoneare goethite,hematite,chamosite, and siderite. Locally, magnetiteor |  | Khin Zaw, , Meffre, Sebastien, Lai, Chun-Kit, Burrett, Clive, Santosh, M., Graham, Ian, Manaka, Takayuki, Salam, Abhisit, Kamvong, Teera, Cromie, Paul (2014) Tectonics and metallogeny of mainland Southeast Asia — A review and contribution. Gondwana Research, 26 (1) 5-30 doi:10.1016/j.gr.2013.10.010 | Journal (article/letter/editorial) | | 280–270 Ma; Liu et al., 2012) and the Sepon gold mine in southern Laos (ca. 295–288 Ma) (Cromie et al...aggregate garnet skarn with later intense quartz and hematite replacement contains the most enriched hypogene...electrum Chalcopyrite, pyrite, magnetite, bornite, hematite, tetrahedrite, galena, enargite, sphalerite, molybdenite...Ma, 277.4 ± 2.7 Ma) 2 Fig. 2 Phu Kham (Cu– Au) (Mine) Laos 18.883N 102.908E Truong Son Volcaniclastics...chlorite, epidote, carbonate, quartz, sericite, hematite; high-sulphidation with pyrophyllite at hangingwall |  | Riegler, Thomas, Beaufort, Marie-France, Allard, Thierry, Pierson-Wickmann, Anne-Catherine, Beaufort, Daniel (2016) Nanoscale relationships between uranium and carbonaceous material in alteration halos around unconformity-related uranium deposits of the Kiggavik camp, Paleoproterozoic Thelon Basin, Nunavut, Canada. Ore Geology Reviews, 79. 382-391 doi:10.1016/j.oregeorev.2016.04.018 | Journal (article/letter/editorial) | | northeast to southwest: Kiggavik (formerly Lone Gull), Bong, End Grid and Andrew Lake. All of the high grade...study analyzed three representative samples from the Bong prospect that represent the two types of solid CM...and natural oxides T and silicates (MnTiO3, hematite, albite, orthoclase, and diopside), and corrections...rock chemistry and carbon isotope values for the Bong MCM are listed in Table 1. The BG4238 sample contain...carbonaceous mineralized nodules in samples from Bong Uranium deposit in the same ara (Sharpe et al., |  | Hou, Lin, Xiong, Fuhao, Wang, Wei, Guo, Linnan, Peng, Huijuan, Ni, Shijun, Zhang, Qiming (2019) Carboniferous-Triassic felsic igneous rocks and typical mineral deposits in the Truong Son orogenic belt, SE Asia: Implications for Paleo-Tethyan tectonic evolution and metallogeny. Ore Geology Reviews, 112. 103036 doi:10.1016/j.oregeorev.2019.103036 | Journal (article/letter/editorial) | | Long Chieng Track Au–Ag–Cu, Nam Pathene Sn–Zn, and Bong Mieu PR Au deposits, have a close genetic relationship...wt.% FeT AL with ore assemblage of magnetite, hematite, pyrite and skarn minerals (Zhu et al., 2012)...magnetite, pyrrhotite, chalcopyrite, pyrite, and/or hematite and limonite occur within the orebodies, skarn...weathering on the original magnetite formed secondary hematite (Fig. 3I). 3.2 Nam Pathene Sn–Zn deposit The Nam...orogenic U R or Carlin-like Au±Ag (e.g., Sepon Au, Bong Mieu Au). Post-collisional extension likely occurred |  | | Journal (article/letter/editorial) | | alumina is generally less than 4%. Magnetite, hematite, siderite, pyrite and griinerite are the predominant...Precambrian W: 43 Cascade-Mozaan; Middle Precambrian W: 44 Bong Range 2 Abbreviations, units of measure, and references...principal ferriferous minerals of MECS-IF are hematite, siderite and magnetite (Table II). Pyrite is...predominant ferriferous minerals are goethite, hematite and siderite. P is moderately abundant in SCOS-IF...glauconite Gn greenalite Go goethite Gr grunerite Hm hematite Ma martite Mc marcasite Mg magnetite Mn minnesotaite |  | Chi, Guoxiang, Haid, Taylor, Quirt, David, Fayek, Mostafa, Blamey, Nigel, Chu, Haixia (2017) Petrography, fluid inclusion analysis, and geochronology of the End uranium deposit, Kiggavik, Nunavut, Canada. Mineralium Deposita, 52 (2) 211-232 doi:10.1007/s00126-016-0657-9 | Journal (article/letter/editorial) | | sub-Thelon basement and is associated with clay- and hematite-altered fault zones. Fluid inclusions were studied...is associated with intense illite ± sudoite ± hematite ± aluminum phosphates sulfates (APS), as well...1520, 1114, and 982 Ma Miner Deposita for the Bong deposit (Sharpe et al. 2015), and ca. 1293 and 1187...due to strong hematitization (H1; Fig. 4a). The hematite (H1) is finegrained and is not associated with...are variably hematitized (H2). Like H1, the H2 hematite is also fine-grained, but unlike H1, H2 is intimately |  | Grare, Alexis, Benedicto, Antonio, Lacombe, Olivier, Trave, Anna, Ledru, Patrick, Blain, Mario, Robbins, John (2018) The Contact uranium prospect, Kiggavik project, Nunavut (Canada): Tectonic history, structural constraints and timing of mineralization. Ore Geology Reviews, 93. 141-167 doi:10.1016/j.oregeorev.2017.12.015 | Journal (article/letter/editorial) | | Zone deposits: Farkas, 1984; Shabaga et al., 2017b; Bong deposit: Riegler et al., 2016; Sharpe et al., 2015;...disseminated, fine-grained hematite, magnetite and rare specular hematite (also filling vugs). Veins...Veins of crustiform hematite and anhedral microcrystalline quartz (Fig. 5E) attest for synchronous brecciation... Calcite veins are fractured and stained with hematite (Fig. 12D, E) and reworked clasts (Fig. 12F) with...(metre scale). It is characterized by fine-grained hematite that imparts the bright reddish color to the fault |  | | Journal (issue) | | Binghamton, N.Y. ................ 6 Memories of Mine HIii ............. 7 Historical Mining Certificates...chryso colla. Stones: (a) stones proper including hematite; belemnites and ammonites (trne fossils). (b)...ing centers in Europe) where he was employed as town physician and apothecary (elective offices). In...lection. The dedicatory epistle and p reface provide a mine of information regard ing Gesner's intentions in...moved to the home of my maternal grandparents in Mine Hill, near Dover, New Jersey. At that time my grandfather |
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