 | Moussa, N., Fouquet, Y., Le Gall, B., Caminiti, A. M., Rolet, J., Bohn, M., Etoubleau, J., Delacourt, C., Jalludin, M. (2012) First evidence of epithermal gold occurrences in the SE Afar Rift, Republic of Djibouti. Mineralium Deposita, 47 (5) 563-576 doi:10.1007/s00126-011-0397-9 | Journal (article/letter/editorial) | | gold occurrences in the SE Afar Rift, Republic of Djibouti N. Moussa & Y. Fouquet & B. Le Gall & A. M. Caminiti...2012 Abstract The geology of the Republic of Djibouti, in the SE Afar Triangle, is characterized by...d’Etude et de Recherche de Djibouti (CERD), BP 486, Route de l’Aéroport, Djibouti gold and electrum with...rift system. Keywords Afar Triangle . Republic of Djibouti . Continental rifting . Epithermal system . Gold...active rift system exposed in the Republic of Djibouti has received very little attention in terms of |  | Moussa, N., Rouxel, O., Grassineau, N.V., Ponzevera, E., Nonnotte, P., Fouquet, Y., Le Gall, B. (2017) Sulfur and strontium isotopic study of epithermal mineralization: A case study from the SE Afar Rift, Djibouti. Ore Geology Reviews, 81. 358-368 doi:10.1016/j.oregeorev.2016.10.028 | Journal (article/letter/editorial) | | mineralization: A case study from the SE Afar Rift, Djibouti N. Moussa, O. Rouxel, N.V. Grassineau, E. Ponzevera...mineralization: A case study from the SE Afar Rift, Djibouti, Ore Geology Reviews (2016), doi: 10.1016/j.oregeorev...Mineralization: A case study from the SE Afar Rift, Djibouti PONZEVERA 3 , P.NONNOTTE4,Y. FOUQUET3, B. T...IST, Centre d’Etude et de Recherche de Djibouti, BP 486, Djibouti; 2 University of Hawaii, Honolulu,...synrift volcanic rocks from the SE Afar Rift in Djibouti. To infer fluid sources in this system, coupled |  | Moussa, N., Boiron, M.C-, Grassineau, N.V., Asael, D., Fouquet, Y., Le Gall, B., Rolet, Joël, Etoubleau, J., Delacourt, C. (2019) Mineralogy, fluid inclusions and stable isotope study of epithermal Au-Ag-Bi-Te mineralization from the SE Afar Rift (Djibouti) Ore Geology Reviews, 111. 102916 doi:10.1016/j.oregeorev.2019.05.002 | Journal (article/letter/editorial) | | Au-Ag-BiTe mineralization from the SE Afar Rift (Djibouti) N. Moussa, M.C- Boiron, N.V. Grassineau, D. Asael...Au-Ag-Bi-Te mineralization from the SE Afar Rift (Djibouti), Ore Geology Reviews (2019), doi: https://doi...Au-Ag-Bi-Te mineralization from the SE Afar Rift (Djibouti) N. Moussa*1,2,3; M.C- Boiron4; N.V. Grassineau5;...Centre d’Etudes et de Recherches de Djibouti, B.P. 486, Djibouti 2) IFREMER, Centre de Brest, BP 70,...hydrothermal veins from the SE part of the Afar Rift (Djibouti) were studied. Mineralization occurs as gold-silver |  | | Journal (article/letter/editorial) | | solution. As the hydrate crystallizes to form goethite, uranium is excluded from the structure and forms...of chiefly lepidocrocite, with some amounts of goethite, hematite and magnetite. The “hematite” content...taken as the approximate sum of lepidocrocite, goethite and hematite, and was estimated from the X-ray...shown in Fig. 2. The broad endothermic peak in the region of 75-15O’C is due to the loss of water, mainly...characteristic endotherms of lepidoorooit~goethite mixtures in the region 250-390°C and a weak exotherm at about |  | Waite, T.D., Davis, J.A., Payne, T.E., Waychunas, G.A., Xu, N. (1994) Uranium(VI) adsorption to ferrihydrite: Application of a surface complexation model. Geochimica et Cosmochimica Acta, 58 (24) 5465-5478 doi:10.1016/0016-7037(94)90243-7 | Journal (article/letter/editorial) | | model simulations and U (VI) adsorption data on goethite for a single total inorganic C content (C, = IO-’...corners to form a cross-linked structure similar to goethite or akaganeite (WAY. CHUNASet al., 1993). Electron...at pH 5.5, and then decreased to zero in the pH region X-9. Similar observations have been made by HSI...nonlinear). Note also that the pH “edge” in the alkaline region shifted to a lower pH range in the batch experiments...“edge” in the acidic pH range moved to a higher pH region as the total U( VI) concentration added was increased |  | | Journal (article/letter/editorial) | | as weight of oxide). The Fe phase, mainly hydro-goethite, has a very low content of metals of economic...It is an iron oxyhydroxide similar to goethite and hydra-goethite (I.R. spectroscopy). Morphologically...to the average absorption extrapolated from the region of EXAFS oscillations (see further). The spectra...Pacific Rise axis at 2 I “N. Geochim. Cosmochim. Arta 50,1933- 1939. HONJOS. ( 1980) Materiai fluxes and |  | | Journal (article/letter/editorial) | | ferric-hydroxide primarily of ferroan nonthe goethite-amorphous tron oxides ranging from to well-crystallized...usually occur within the iron-montmorillonite or goethite-amorphous facies. Anhydrite is present as nodules...chalcopyrite is the only sulfide precipitating in the region where the brine temperature is between 150 and...temperature interval from 25 to 300°C Geochim. Cosmochim Arta 26. 1029-l 043. Ross D. (1972) Red Sea hot brine |  | Meissner, C.R., Dini, S.M., Farasani, A.M., Riddler, G.P., Smith, G.H., Griffin, M.B., Van Eck, Marcel (1990) Preliminary geologic map of the Thaniyat Turayf Quadrangle, sheet 29C, Kingdom of Saudi Arabia. Open-File Report Vol. 1990 (90-259) US Geological Survey doi:10.3133/ofr90259 | Report (issue) | | potentially oil-and-gas-bearing Wadi as Sirhan region to include the An Nafud. INTRODUCTION LOCATION...scale of 1:500,000. The sedimentary geology of the region is described by Powers and others (1966) in a...phosphate resource assessement of the Sirhan-Turayf region including parts of the Thaniyat Turayf quadrangle...east-central part of the quadrangle, where fragments of goethite cover the surface. However, these iron-oxide fragments...Mindassah type localities are located in Wadi umm Arta and Busayta al Mindassah (lat 29° 47' N., long 37° |  | | Journal (article/letter/editorial) | | concentration in marine sediments. Geochim. Cosmochim Arta 48, 25032516. BUDD M. S. and BEWICKH. A. (1952)...Kinetics and mechanism of the sulfidization of goethite. Amer. J. Sci. 274, 94 I-952. ROBERTSW. M. B. |  | | Report (issue) | | Chalcopyrite Covellite Others "GRAPHITE" (amorphous) Goethite Limonite Apatite Note: Major minerals in capitals...minute quartz grains set in baryte with minor goethite. Their precise paragenesis is obscure. micas...has a simple structure. A typical profile in this region has already been discussed (p.19). Although topographic...11t■ of calclta-rock, At 12,5111 tlwre h • }c■ q•arta ••in vith eoarN pyrite 1114 ? alderit.e. At 11,&...Cn(IIIUU7 ltued ad. 'olaat lilt•' 1 dol.St1o in ,arta. OalO&l"NU bo:m'bl�•t, flr,- 1ia1l&r to above wtth |  | Meissner, C.R., Dini, S.M., Farasani, A.M., Riddler, G.P., Van Eck, Marcel, Aspinall, N.C. (1989) Preliminary geologic map of the Al Jawf Quadrangle, sheet 29D, Kingdom of Saudi Arabia. Open-File Report Vol. 1989 (89-342) US Geological Survey doi:10.3133/ofr89342 | Report (issue) | | oil-and-gas-bearing rocks of the Wadi as Sirhan region to include those of the An Nafud basin. Discovery...1:500,000 scale. The sedimentary geology of the region was described by Powers and others (1966) in a...phosphate resource assessment of the Sirhan-Turayf region, including parts of the Al Jawf quadrangle. The...sandstone and ferruginous chert breccia containing goethite and hematite nodules. Silicification and formation...Mindassah member (Ttmm) are located in the Wadi umm Arta and Busayta al Mindassah areas about 90 km west |  | | | | metal ion, often with a semi-metallic lustre. Goethite, hematite, magnetite, pyrolusite, ilmenite, chromite... 18 pentlandite (light bronze yellow), p. 52 goethite (yellow, red), p. 72 Beginner's Guide to Minerals...black), p. 68 sphalerite (brown, yellow), p. 92 goethite (yellow, red), p. 72 ilmenite (red to brownish...mark the Interior Plains. 4 Below the Innuitian Region lie the Arctic Lowlands. 5 Inside the Shield lie...Canada. 7 The older mountains of the Innuitian Region make up the country’s northernmost territory. 8 |  | | Book | | our wealth. Just as the regolith of the Yilgarn region in Western Australia is presently producing much...mineralogically. For example, the Al content of goethite in regolith materials may be related to the conditions...under which it forms, whereas the simple fact that goethite is present only indicates the precipitation of...minerals: quartz, illite, kaolinite, gibbsite, goethite or haematite, anatase and calcite. Of these, ...important in more arid regolith. Composition goethite haematite may include Al in the Fe site, and |  | | Report (issue) | | third order administrative area, basin/formation/region(area)/deposit, and deposit/site name. Guano and...third order administrative area, basin/formation/region(area)/ deposit, deposit/site name, deposit type...information in the next two fields, .Basin/Fmt/Region (area)/Deposit and Deposit/Site_Name, is meant...Yacimientos no metaliferos y rocas de aplicacion de la region Patagonia-Comahue: Argentina Ministerio de Economia...Fertilizer mineral occurrences in the Asia-Pacific region: Honolulu, Hawaii, East -West Resource Systems |  | | Report (volume) | | receiver functions and surface wave dispersion in Djibouti Stuart, G.W., BAsTow, I.D. & Esincer, C.J. Crustal...Ethiopia~Yemen flood basalt pro- vince) (Fig. 1). Thus, the region records both the evolution of Earth’s youngest...enced episodes of volcanism since c. 45 Ma, with Djibouti, Between c. 31 and 22 Ma, volcanism was widespread...Pre-rift flood basalts and Quaternary lavas in a large region surrounding the volcanically active Afar province...basin development in the 236, 409-438. Turkana region. Tectonophysics, the American Geophysical Union |  | | Book (edition) | | "' ... --.._ \ • K EY M A P #7 GROTO N (NJt) ARtA ,,t 1 ,r, 2 \ H E BRON '� H£BR01'1 ·"'((::... Ge.rnet v. Almani ite ( ? ) " v. Spessartite Goethite - pse udomorphs after pyrite . Graphite (? ) ...Somerville , Miss . . Ellenvil le , N.Y. ( 6a : p589 ) Goethite ( 6a : p681 ) ( 6a : p64? } -104- OX idas...GONI'HITE GOETHITE LIM;NITE GROUP FeO ( OH ) FeO � QH) .nH20 f Fe 20 3 � nH� -106- OXides GOETHITE - Brown...Fluorapat 1t � - crystal form, streak , weight . Goethite - weight , I,arting, habit , lust er. Graftoni |  | | Report (issue) | | ober arenas, Sieered eae ae a WeedlesIMountain west arta cies cache Wa sta cle eaale te celia are einen ee...the Appalachian Mountains, and in the Piedmont region. In central United States mining has been confined...Rhodochrosite veins are common in the Rocky Mountain region, as, for instance, at Rico, Alma, Monarch, and...Manganite (Mn,O,.H,O) corresponds in type with goethite, the iron compound, and hausmanite (Mn,O,) is...so-called ‘‘brown ores,’’ although in the Lake Superior region much ore is in the form of hematite. Manganese |  | | Journal (article/letter/editorial) | | iron ores are localized in the fault zones as goethite-hematite lenses with minor syngenetic quartz....microvoids or pores throughout the metasomatised region which permit fluids to infiltrate thereby allowing...electric potential distribution in the near-surface region. It stands to reason that SCMs for bacterial and...Biotic Fh has less intra-particle (including surface region) atomic order (MBS quadrupole splitting), smaller... The Laboratory, Citadel Hill, Plymouth, Devon (arta@mba.ac.uk) To probe record and forcing mechanisms |  | | Book | | lapaz Iopaz / A"'l/ P.rite Aoll/ uU af/a P•rite arta ./ /./ / / ./ 1000 /, . /// / ./ / ./ / '•...occur as the red hematite (Fe20a), ochre-brown goethite (FeOOH), and the often amorphous Fe20a· Fe 20a...is derived from various quantities of hematite, goethite, and amorphous iron hydrox:ide. A fraction of...color pigment Metamorphic Rocks color limonite (goethite) ochre, brown, tan, cream hematite red, bluish...years. From WINKLER (1970) after BEETON (1965) region, Na and K were obviously removed from the igneous |  | | Report (issue) | | Ueiaaenborn ot the Rer;io~l 1tatt ot the Central Region, United States Geological Survey. ' Jenke, Ian...is given here. ot the minere.l resources or any region. The Trinity River tributary area ia traversed...form the present surface over much or the Oza.rk region and dip gently awo.y from the core or pre-Cambrian...vanian rocks. e. ·. Oea&e Plaiu The Olase Plaina region ia here considered to be the larc• area exteDdill£...Pennayln.nian and Perm.iu ar;e. Eltoept in the region borderi~J~: the liiohita, Arbuckle, and Ouachita |  | | Book | | durability and density. However, crystals are also arta Lo} eroded crystal fragments concentrate due to...to earthy vitreous luster chessylite banding goethite matrix AZURITE CRYSTALS ON MATRIX [vazanrs...results in yellowish white or gray specimens, and goethite produces brown or yellow material. Jasper has...excavated material dot the landseape in the opal mining region of Coober Pede in South Australia. brown base opal...platelike inclusions of iron oxide (hematite, p.57; goethite; or copper) oriented parallel to one another. |  | | Report (issue) | | Brown responsible for the western Arabian shield region in which he had previously worked under U.S. foreign-aid...was depicted by hachuring and that of the shield region by shaded relief utilizing the airbrush technique...Map showing major structures of the Gulf of Aden region.__________-_____--_-_-_____------------- In pocket...foliation is given. Since at least Jurassic times the region has suffered intermittent epeirogenic uplift accompanied...PREVIOUS WORK Volcanic rocks of the southwestern region of the Protectorate have been the subject of investigation |  | | Report (issue) | | copper-molybdenum mineralisation near Balluchulish, Highland Region 44 17 Lead, zinc and copper mineralisation in...Illite Dickite Tourmaline Zircon Oxides Hematite Goethite ?Valentinite ?Kermesite Sulphate Ba.ryte Sulphides...lt•vitll -- p&rliDp on4 oluta, looall:, broGel.8- Q\arta niml, p1'1"1t. 8tl:'4...Atft1' and at 13.3 a p: |  | | Journal (issue) | | Napa Vall.-, floctr and Gem Club. Annual Show. Arta and Craft Bldg., Town & Country Fair• ground•. 3rd...00. Three for $9.00. Four for $10.00. GROUP No. Goethite Hemotile Limonile Stibnite Orpime nt Enargite...effort, the miles of windin g river bed had the region was belatedly declared a been soaking it up, the...effort, the miles of winding river bed had the region was belatedly declared a been soaking it up, the... 1omethln11 new being added. No llata. Aahley'a Arta & Crafta, Tonica, llllnola. 00 EGGER LAPIDARY SHOP |  | | Report (issue) | | 020, c = 3.107;Z = 1 733 (Cu/Ni)—Potaro River region, British 1 Hg in (a) 0, 0, 0; 1 Pd in @) 3, 4...quite unlike those of manganite, lepidocrocite, goethite, and groutite (RMT; LGB) 186 230 1.638 hkl...(Fe)—Cornwall, England (UT, A622). Same pattern given by goethite from Steeprock, Ontario Cell dimensions by Peacock...Laity 1.688 Baa 187 el0ld —— co 4 78.2 241. GOETHITE—a-FeO-OH d(calc.) 1.162 1t 62.7 4+ 68.7 Hexagonal...eens 162 ...0-06.5 sess pyrostilpnite..... | ee eae arta 82 PYELDOULC? 5 an ee eee ea acetate 37 FERS RS |
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