 | | Journal (article/letter/editorial) | | 717â738 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 |  | | Journal (article/letter/editorial) | | east-west and 2,000 km north-south. This is a vast region with an array of geologic terranes composed of...The geology and mineral resources of this vast region have been thought about and studied for thousands...critical introduction to the mineral endowment of the region. One of the most valuable papers in the book, for...deposits in the region. The first part of this paper is a synthesis of geologic data for the region obtained...comprehensive view of the mineral endowment of the region and a geologic and metallogenic framework within |  | | 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 DecrĂ©e, Christian |  | | Journal (article/letter/editorial) | | report the ïŹrst Re-Os data on gold-associated arsenopyrite from mesothermal gold-quartz veins in the ancient...geographic map, as well as the oldest geologic and mine map. The FawakhirâEl Sid district is part of a regional...the mineralized quartz veins includes pyrite-arsenopyrite-pyrrhotite-sphalerite-galena-chalcopyrite-electrum...versus 187Os/188Os regression on 5 points of arsenopyrite gives an age of 601 ± 17 Ma with an initial...exploration activity, especially in Egypt, Arabia, Eritrea, and Ethiopia (Figure 1). Recent discoveries of |  | Bierlein, F. P., McKeag, S., Reynolds, N., Bargmann, C. J., Bullen, W., Murphy, F. C., Al-Athbah, H., Brauhart, C., Potma, W., Meffre, S., McKnight, S. (2016) The Jebel Ohier depositâa newly discovered porphyry copperâgold system in the Neoproterozoic ArabianâNubian Shield, Red Sea Hills, NE Sudan. Mineralium Deposita, 51 (6) 713-724 doi:10.1007/s00126-015-0630-z | Journal (article/letter/editorial) | | principal localities and principal mines (1 Ariab, 2 Bisha, 3 Jebel Sayid, 4 Sukari) The Jebel Ohier mineralized...mineralized system is situated in a remote desert region some 300 km to the west-northwest of Port Sudan...Shield (ANS) in NE Africa, a geologically complex region with demonstrated pedigree for world-class orogenic...volcanic-hosted sulfide deposits (e.g., Ariab, Bisha, and Jebel Sayid; Fig. 1), but hitherto considered...porphyry-style Cuâ Au mineralization in a Precambrian region previously considered not prospective for this |  | | Journal (article/letter/editorial) | | amphibolite-facies metamorphism experienced in this region as a result of the 1.3â1.0 Ga Namaqua Orogeny and...2007. The Bisha volcanic-associated massive sulïŹde deposit, western Nakfa Terrane, Eritrea. Econ. Geol...LAM-ICP-MS study of the distribution of gold in arsenopyrite from the Lodestar prospect, Newfoundland, Canada |  | | Journal (article/letter/editorial) | | tonnages, as an open pit operation will typically mine large tonnages at lower grades, illustrating the...are among the earliest formed VMS deposits in the region (Walker and McDonald 1995; Goodfellow 2003). The...0 La Zarza 9.1 Karkaralinski Abyz (Karaganda region, Kazakhstan) 205.0 Gai 50.0 107.0 Yubileinoe...actinolite, Ag argentite, And andalusite, Aspy arsenopyrite, Bn bornite, Bo biotite, Cb carbonate, Cc chalcocite...mineral paragenesis, with the common occurrence of arsenopyrite, arsenian pyrite, tennantite and tetrahedrite |  | | Journal (article/letter/editorial) | | deposit. Today, Sukari is the single major producing mine in US the Eastern Desert but many other significant...Desert gold-bearing veins dominated by pyrite, arsenopyrite, and (or) pyrrhotite, in addition to subordinate...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 |  | | Book | | Genesis of the Koka Gold Deposit in Northwest Eritrea, NE Africa: Constraints from Fluid Inclusions and...Deposit, Jiangnan Orogenic Belt: Evidence from the Arsenopyrite and Chlorite Mineral Thermometers Reprinted...useful for revealing the geodynamic evolution of a region, and more effective for regional prospecting exploration...the deposits in the Yangshan gold belt. The arsenopyrite and chlorite mineral thermometers are applied...Genesis of the Koka Gold Deposit in Northwest Eritrea, NE Africa: Constraints from Fluid Inclusions and |  | | Book (edition) | | the mineral industry and human consequences 11.6.1 Mine waste catastrophe 11.6.2 Mineral process plant failure...tailing in the future. The tailing of Kolar gold mine, India, historically stored at tailing dam, is being...gray to silver-white/ grayish black Metallic Arsenopyrite, FeAsS (Fig. 1.31) 7 Orthorhombic None/ conchoidal...pegmatite, contact metamorphism, metasomatism Arsenopyrite is the major source of arsenic, minor gold,...and alloys Delicate acicular ore at Broken Hill mine, Australia, Friedrichssegen, Germany. Secondary |  | | Report (issue) | | mineral commodities. The estimated value of U.S. metal mine production in 2017 was $26.3 billion (table 1),...Principal contributors to the total value of metal mine production in 2017 were gold (38%), copper (30%)... 9 TABLE 1.âU.S. MINERAL INDUSTRY TRENDS Total mine production (million dollars): Metals Industrial...BY STATE VALUE OF METALS PRODUCED IN 2017, BY REGION Au B3 P1 P1 Fe FeFe FeFe B5 Fe Fe B1 Au Northeast...VALUE OF INDUSTRIAL MINERALS PRODUCED IN 2017, BY REGION P IS EXPLANATION Value, in billion dollars <2 |  | | Book (edition) | | visit to zincelead polymetallic ore deposit, Megan Mine, Germany. Source: Ref. 24. 10 1. ROCKS AND MINERALS...schist host rock at Kolihan Section, Khetri Copper Mine, India. 1.3. MINERALS 11 FIGURE 1.23 Chromite...texture in calc-silicate host rock at Rajpura-Dariba Mine, India. Source: Prof. Martin Hale. chromium with...a visit to zincelead polymetallic deposit, Megan Mine, Germany. and extremely high speciïŹc gravity occurs...garnet schist from Kolihan Section, Khetri Copper Mine, India. Source: Prof. Martin Hale. FIGURE 1.28 |  | | 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...flow-sheet at a large mine has more steps and is more complicated than that at a small mine. Grade of ore. High-grade...The fact that the mill owner is also usually the mine owner is not sufficient insurance as to the adequacy |
|
