 | | Journal (article/letter/editorial) | | 717–738 The Bisha Volcanic-Associated Massive Sulfide Deposit, Western Nakfa Terrane, Eritrea C. TUCKER...Alberta, Canada T2G 0V2 Abstract The Neoproterozoic Bisha volcanic-associated massive sulfide deposit (VMS)...in a newly discovered VMS district in western Eritrea. The host stratigraphic section comprises a large...possibly coeval and cogenetic intrusion known as the Bisha Gabbroic Complex, ~3 km downsection, a series of...Two other VMS deposits are present along strike: Bisha Northwest, 1.5 km to the north-northwest, and Harena |  | Zhao, Kai, Yao, Huazhou, Wang, Jianxiong, Ghebretnsae, Ghebsha Fitwi, Xiang, Wenshuai, Xiong, Yi-Qu (2019) Genesis of the Koka Gold Deposit in Northwest Eritrea, NE Africa: Constraints from Fluid Inclusions and C–H–O–S Isotopes. Minerals, 9 (4) 201 doi:10.3390/min9040201 | Journal (article/letter/editorial) | | Genesis of the Koka Gold Deposit in Northwest Eritrea, NE Africa: Constraints from Fluid Inclusions and...Nakfa terrane and the Adobha Abiy terrane, NW Eritrea. Based on a paragenetic study, two main stages...vein-hosted gold ± sulfide deposits and occurrences in Eritrea are concentrated along NNW- and NNE-trending narrow...the Asmara-Nakfa Belt (ANB). Both the world class Bisha VMS and Koka gold deposits are located in the AAB...The Koka gold deposit is located in northwest Eritrea, which has a long mining history that extends back |  | | Book | | Tunisia, Mali, Mauritania, Egypt, Sudan, and Eritrea. Originally our goal was to include papers on deposits...the setting and origin of major deposits in the region, together with information on tonnages and grades...Northeast Africa, with a focus on deposits in Eritrea, Sudan, and Egypt. The second paper is by M. Bouabdellah...comparisons and contrasts with MVT deposits in the region. The last part is focused on sediment-hosted iron...Tunisia, and Comparisons with MVT Deposits in the Region . . . . . . . . . . 497 Sophie Decrée, Christian |  | | Journal (article/letter/editorial) | | geographic map, as well as the oldest geologic and mine map. The Fawakhir–El Sid district is part of a regional...exploration activity, especially in Egypt, Arabia, Eritrea, and Ethiopia (Figure 1). Recent discoveries of...in Eritrea, and Tulu Kapi in Ethiopia, attest to a largely untapped gold potential in this region. Exploration...within the structural and thermal evolution of the region based on geochronological information, which is...Location of the major gold deposits of Egypt, Sudan, Eritrea, Ethiopia, and western Saudi Arabia plotted on |  | Volesky, John C., Leybourne, Matthew I., Stern, Robert J., Peter, Jan M., Layton-Matthews, Daniel, Rice, Sarah, Johnson, Peter R. (2017) Metavolcanic host rocks, mineralization, and gossans of the Shaib al Tair and Rabathan volcanogenic massive sulphide deposits of the Wadi Bidah Mineral District, Saudi Arabia. International Geology Review, 59 (16) 1975-2002 doi:10.1080/00206814.2017.1307789 | Journal (article/letter/editorial) | | the Shwas mineral district east of WBMD, and the Bisha (Barrie et al. 2007) and Asmara mineral districts...high CaO and LOI, consistent with the presence of calcite observed in thin section. Iron oxide contents are...wt.%), consistent with the presence of abundant calcite, as identified by XRD and in thin section. Barium...haematite, goethite, quartz, jarosite group minerals, calcite and barite (Supplementary Table 3; Figure 3). We...eastern margin of the Red Sea (Szymanski 2012). The region underwent a pre-rift Palaeozoic–Mesozoic cooling |  | | Report (issue) | | Basiliola is reported for the first time from this region. Heretofore the genus was SYNONYMY AND REFERENCES...quarry on road leading up to top of south levee of Bisha-Cawa, at mouth of river, about halfway up hill....about 1.4 miles south of the mouth of Hiza-gawa (Bisha-gawa). Jolonica ryukyuensis Yabe and Hatai Kikaithyris...limestone, roadcut through north levee of Hiza-gawa (Bisha-gawa) at mouth of river. Jolonica ryukyuensis Yabe...broadly and roundly domed; umbonal region flattened; median region swollen, the swelling continued to |  | | Journal (issue) | | 458 pages $4.50 Frank Dobie. Fascinating lost mine and buried treasure stories by a master story teller...MIRAGES, Philip A. Bailey. This is a favorite of lost mine books. Pegleg Smith's Gold, ghosts of Vallecito... Lost Pegleg, Lost Dutch Oven and 20 other lost mine legends of California, Nevada. Arizona and Texas...the Baker topographic map of the Navajo Mountain region in northern Arizona. Tucked away in one corner...Bill has been guiding exploring parties over that region for nearly 25 years, and he and Katherine know |  | FLINT, D. E., CORWIN, G., DINGS, M. G., FULLER, W. P., MACNEIL, F. S., SAPLIS, R. A. (1953) LIMESTONE WALLS OF OKINAWA. Geological Society of America Bulletin, 64 (11) 1247 doi:10.1130/0016-7606(1953)64[1247:lwoo]2.0.co;2 | Journal (article/letter/editorial) | | deposition of secondary calcite between the original particles. The secondary calcite binds the particles...This stream is the largest 1 Also known as the Bisha-gawa. Downloaded from https://pubs.geoscienceworld...the same relationship occur in the surrounding region and evidently once covered the entire area. The...the upthrown block and are almost as high as in a region as humid as Okinawa and is the they are wide at...calcium bicarbonate, is precipitated as calcite. The precipitated calcite is concentrated in the tiny cracks |  | | Journal (article/letter/editorial) | | the micro scope, and at the northeastern end of Bisha goiwa, some portion of country rocks intrud ed into...prehnite. planes almost planes. at veins calcite joint ribute and traversed white quartz, along...medium-grained gabbro. 22. Swarm complex hydrothermal mine of augite Mineral Fig. Murotomisaki is observed...are serpentine, chlorite, actinolite, prehnite, calcite, apa tite, pyrrhotite and pyrite. The mineral paragenesis...intermediate Poz in the magma intruded into this region. Pyrrhotite and chalcopyrites are found as subordinate |  | | Journal (article/letter/editorial) | | particularly in NE Sudan, Asmara, and Western Eritrea (Barrie et al. 2007, 2016). These supergene Au...near-surface region above the Scuddles underground VMS deposit. Fig. 1 a Golden Grove Region in the Archaean...from bleached kaolinitic saprolite near Scuddles mine indicate an older weathering event assigned pre-late...through and surround the silcrete body in Scuddles mine area. Out of the 108 RC drill holes, regolith profiles...rutile, zircon, monazite, xenotime, carbonates (calcite, dolomite, and ankerite), and fibrous pyrosmalite |  | | Book | | original volcanic chain, which ran partly where Bisha and Taif now stand, had been unroofed and worn down...parts remaining as dry land were the northwest, the region around Tabuk and perhaps some ground in the southwest...together. Circulating groundwater will film them with calcite or some similar mineral which will cement them...skeletons, fish bones and teeth, all mixed with calcite. The high phosphorus content of the sediment material...preserved. On the left, a slice through the hard calcite of a fossil log retains traces of the original |  | | Journal (article/letter/editorial) | | deposit. Today, Sukari is the single major producing mine in US the Eastern Desert but many other significant...km from Sinai and eastern Egypt, through Sudan, Eritrea, and Ethiopia, and into Kenya (Fig. 1). Prior to...largescale open-pit and a high-grade underground mine. Franzmann et al (2015) report total T measured...underground operations in 2011. In 2012, the Sukari Gold Mine Co. mined 6.4 Mt of ore, processed 4.5 Mt of ore...the Ariab district in Sudan (Fig. 1) and at Bisha in Eritrea (Helmy, 1999; Barrie et al., 2007, 2016; Johnson |  | | Book (edition) | | reached may be found at different places in a .region of metamorphic rocks and the information used to...limestone calcite dolomite marble marble marble banded marble marl phyllosJiicates calcite calc-slate...composition surrounding igneous intrusions in the Oslo region of Norway, and recognized that there is a simple...Connemara, Ireland. Assemblage (a) hornblende+ calcite+ clinozoisite, assemblage (b) clinozoisite + diopstde...calcium present m apatite (10Ca0.3P 20 5) and calcite (CaO.C0 2). C = [CaO]- 10/3 X [P20 5] - [Ca02 |  | Smith, C.W., Waters, B.C., Naqvi, M., Worl, R.G., Helaby, A.M., Flanigan, V.J., Sadek, H.S., Samater, R.M. (1983) Geological and geochemical studies in the Wadi Bidah District, Kingdom of Saudi Arabia. Open-File Report Vol. 1983 (83-672) US Geological Survey doi:10.3133/ofr83672 | Report (issue) | | THE B-24 ANOMALY AREA, KHAYAL AL MASNA'AH ANCIENT MINE................................. Geology..........PART OF THE B-24 ANOMALY AREA, MAHAWIYAH ANCIENT MINE.......................................... Geology..................... 62 63 63 64 MULHAL ANCIENT MINE..................................... 64 Geology...of airborne electromagnetic anomalies and ancient mine workings. ....... 4 Map of the northern part of...part of the B-24 anomaly area, Mahawiyah ancient mine. .................................... 53 Page |  | | Book | | Genesis of the Koka Gold Deposit in Northwest Eritrea, NE Africa: Constraints from Fluid Inclusions and...useful for revealing the geodynamic evolution of a region, and more effective for regional prospecting exploration...Genesis of the Koka Gold Deposit in Northwest Eritrea, NE Africa: Constraints from Fluid Inclusions and...evolution process of regional structures. This region is located within the southeastern margin of the...were significantly reworked during orogenies. The region witnessed migration and collision between the NCC |  | | Journal (issue) | | always fgured it was just likker talk." "Tom had a mine he called the 'Dark Secret'," put in Fred Green...wall to wall. This was Tule Canyon. Here were old mine workings without end — mountainous piles of tailings...blown there by the Indian artifacts found in ancient mine workings at Tule canyon. The tools, evidently used...old-time friends, and other days, When eyes of love in mine did gleam. Within the firelight's ruddy cheer. The...pictures or a story? HARRIET NARISS The Four Corners region has many things of interest, and we have printed |  | | Book (edition) | | example, halite crystals have shape of hexahedron; calcite rhombohedra, diamond octahedral and quartz have...biotite (H2K(MgFe)3Al FIGURE 1.12 Alabaster (calcite) is medium to hard carbonate (CaCO3) mineral of...gemstone and jewelry. 1.3. MINERALS FIGURE 1.14 Calcite is a carbonate mineral (CaCO3) with trigonalerhombohedral...with occasional gray, yellow and green shades. Calcite is the main constituent of limestone, marble and...visit to zincelead polymetallic ore deposit, Megan Mine, Germany. Source: Ref. 24. 10 1. ROCKS AND MINERALS |  | | Book (edition) | | the mineral industry and human consequences 11.6.1 Mine waste catastrophe 11.6.2 Mineral process plant failure...gibbsite (Al(OH)3), goethite (FeO(OH)) Carbonate Calcite (CaCO3), magnesite (MgCO3), dolomite (CaMg (CO3)2)...The common gangue minerals are quartz (SiO2), calcite (CaCO3), clay minerals (All types), mica (All types)...tailing in the future. The tailing of Kolar gold mine, India, historically stored at tailing dam, is being...2H2O), amethyst (SiO2), andalusite (Al2SiO5), calcite (CaCO3), diamond (C), graphite (C), fluorite or |  | | Journal (issue) | | association between karst scholars of the Dinaric region and France continues; Jean Nicod, doyen of the...compares its geographical source in the Dinaric region to its potential extent (the global outcrop of...that this was strong evidence that in any given region most karst flow must be converging into just a...B, that is above the general base level of the region (e.g., above sea level if close to the coast) The...the development of karst landforms in the Guilin region, Guangxi, China Embeyons ‘and fractures being |  | | Book | | pl). Tear-drop dunes in the southern Al Qa‘amiyat region of the south–eastern Rub‘ al Khali. Note slip face...classical example of dendritic drainage in an arid region was of interest as an analogue for the Mars scientific...north-eastern region Arabia Deserta (most of Syria and south-western Iraq), a north-western region Arabia Petraea...DICTIONARIES A desert is here defined as “a temperate region that receives an average annual rainfall of less...states that a desert is “a desolate and barren region, waterless and treeless, but with scanty herbage |  | | Book | | the arts is the proper focus of interest at every mine; that the operations converging on this point are...conditions The problem of ore treatment confronts every mine manager. Mining should be looked upon as a manufacturing...crushers that first take the ore as it comes from the mine (some of them can take 6-ft. cubes) are called COARSE...may be separated readily from quartz, feldspar, calcite and the like by subjection to a powerful magnet...flow-sheet at a large mine has more steps and is more complicated than that at a small mine. Grade of ore. High-grade |  | | Book (volume) | | 1872 he brought out his first social novel, the Bisha-Brikkha or Poison Tree, which was followed by others...Route.” Cheboygan is situated in a fertile farming region, for CHECHENZES—CHEERING which it is a trade...spectroscopically. By such a study in the ultra-violet region of a fraction prepared from crude yttria he detected...time of Berzelius many experimenters have entered mine the purity of a product before it can be valued...solutions. Calcium carbonate separates as hexagonal calcite from cold solutions (below 30°), and as rhombic |
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