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| prebatholith volcanic rocks were assigned to the Matilde and Milagros Formations by Nelson and Tobisch (1967)...(1967). According to these workers, the Matilde Formation consists chiefly of thin-bedded volcanic sandstone...Formation is distinguished from the thin-bedded Matilde Formation by the massiveness of its deposits. The...assigned a middle Eocene age because it overlies the Matilde Formation (Mclntyre and others, 1970). In the...accompanied intrusion of tonalite plutons, such as at Cerro La Torre. In the Quebrada de los Platanos, Nelson and |
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| _________ Siria mine ________________________ ------------- __ ----Los Hornitos mine ______ ;_______...Francisco mine____________________________________ La Uni6n mine ________________ -----------------------(}u...Nicaragua-----------------------------------------------La Cadena prospect----------------------------------Chromite...pa district_____________________________________ La Gringa mine_______________________________ Corona...______ __ ____ ______ _ 48 48 49 50 51 51 51 La Paz mine ______ ---------------------------Cabanas di |
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| in an arc from the Algerian Sahara, through Spain, France, across Germany, with two long arms finishing...Auriferous quartz. left Gold nugget from a Californian mine. seen quite clearly in grains and crystals or in...Egypt, then from Macedonia, Italy, France, and Spain. Gold was next discovered in America, then...near Carthaginia, Marsala in Sicily and Cadiz in Spain. Their trade centres became centres of culture....the In the 5th century BC the Celtic culture of La Tene, which originated in western Switzerland, |
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| observed under a single strong light source (Figure la and b). In the literature only one reference is found...(1980) 1 2 J . Gemrn ., 1980, XVII , 1 FIG . la . Star peridot showing sheen and star under FIG...The best-known wulfenite comes from the Red Cloud mine in Arizona, though crystals from this area are generally...the Dept l'Aude in S. France(3) and in northern Spain in Aragon and Asturias(4). Outside Europe it is...Rome(2'8). Jet was used by the Celts of the Hallstatt and La Tene periods(9) and during the 15th and 16th centuries |
 | Corredoira-Vázquez, Julio, Fondo, Matilde, Sanmartín-Matalobos, Jesús, Taboada, Pablo, García-Deibe, Ana (2018) Filling Tricompartmental Ligands with GdIII and ZnII Ions: Some Structural and MRI Studies. Crystals, 8 (11) 431 doi:10.3390/cryst8110431 | Journal (article/letter/editorial) |
| Structural and MRI Studies Julio Corredoira-Vázquez 1 , Matilde Fondo 1 , Jesús Sanmartín-Matalobos 1 , Pablo Taboada...de Compostela, E 15782 Santiago de Compostela, Spain; julio_corredoira@hotmail.com (J.C.-V.); matilde...de Compostela, E 15782 Santiago de Compostela, Spain; pablo.taboada@usc.es Correspondence: ana.garcia...generator (FR590). The instrument was equipped with a graphite diffracted beam monochromator, and a copper radiation...Bruker Kappa APEXII CCD diffractometer employing graphite monochromatized Mo-Kα (λ = 0.71073 Å) radiation |
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| importance. According to Kanis (1980), the first mine (Miku) was given up in 1972. In the neighbourhood...today it is usual to see three sieves in use—Vi\ lA" and Me". The fine sand is usually collected in a...GEMMOLOGICAL ABSTRACTS ABEL-R£MUSAT (M.). Histoire de la ville de Khotan. (History of the town of Khotan.)...abstract.) Precious and common opal from the Hosaka mine were studied optically and by TEM. The precious...tridymite. R.A.H. BANCROFT (P.). A great gem and crystal mine: St John's Island, Egypt. Lapidary Journal, 34,10 |
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| Tampa, FL Correspondents Miguel Calvo Zaragoza, Spain Michael P. Cooper Nottingham, England Thomas P....ecord Articles Rare sulfosalts from the Van Silver mine, British C olum bia...............................Balacko Famous mineral localities: The Brownley Hill mine, Alston Moor, Cumbria, England....................COVER: ATACAMITE in GYPSUM, 6.8 cm, from the Lily mine, lea, Peru. Irv Brown collection; Jeff Scovil photo...British Columbia the Silver Tunnel o f the Van Silver mine has produced hundreds o f rare and beautiful crystal |
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| conditions where diamond is metastable with respect to graphite. This means that although diamond is kinetically...included dark opaque crystals resembling uraninite, graphite, and spinel—along with dark green and colorless...de Croissance, Effets Chromatiques dans la Coquille et dans la Perle de Pinctada Margaritifera. PhD thesis...Caledonia. Domard J. (1962) Les Bancs Nacriers de la Polynésie Française. Leur Exploitation, Leur Conservation...International de la Perle de Tahiti. Projet de Professionnalisation et de Pérennisation de la Perliculture |
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| CuO and MnO concentrations ranging up to 0.66 wt.% (LA-ICP-MS) and 3.09 wt.% (microprobe), respectively...electron microprobe (except for CuO, analyzed by LA-ICP-MS); average of 4–5 analyses per sample. For...G&G Data Depository. Analyses of trace elements by LA-ICP-MS; average of two analyses per sample (not in...Abduriyim et al., 2006). One blue-green stone from that mine GEMS & GEMOLOGY SPRING 2008 showed some different...Cu-bearing tourmalines from the Alto dos Quintos mine in Brazil show complete overlap, whereas the (light) |
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| samples examined before and after treatment) using LA-ICP-MS. For EDXRF analysis, all X-ray filter options...All spectra were collected at ~0.01 Pascal. For the LA-ICP-MS analysis, a laser beam with a wavelength of...effects of the laser penetration into the nacre during LA-ICP-MS analysis. A minute depression with a length...detected in the nacre of the cultured pearls with LA-ICP-MS, largely due to its much higher sensitivity...“chocolate” treated Tahitian cultured pearls determined by LA-ICP-MS (ppm by weight).a Sample no. Li B Na Mg |
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| contents; thus, iron is likely the main chromophore. LA-ICP-MS analysis showed a relatively high content...& GEMOLOGY SPRING 2011 3 NOSY BE 4 km 0 N MINE AREA Ambato MADAGASCAR LLIN S TA C RY TA R Y...mb an ja ~1 0k m n Demantoid Antetezambato mine Figure 2. The Antetezambato garnet deposit is located... Ta, Th, U, Pb, and the rare-earth elements from La to Lu. Ultraviolet/visible/near-infrared (UV-Vis-NIR)...all samples. The main trace elements measured by LA-ICP-MS were Mg (307–1423 ppm), Al (15–5467 ppm), |
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| silver-containing batteries 80 Table 10 United Kingdom mine production of silver: 1851-1982 83 Table 11 United...86 Table 13 World mine production of silver: 1821-1981 87 Table 14 World mine production of silver...of world silver mine production: 18661870 and 1980 89 Table 16 World and UK mine production of silver...of world total requirements. About 75% of world mine production of silver is obtained as a by-product...consumption and new, "under the ground'' production (mine production) of silver is made up mainly from scrap |
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| analysis by secondary ion mass spectrometry (SIMS) and LA-ICP-MS were required for the rest. GEMS & GEMOLOGY...ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS)—also adapted from other research disciplines—emerged...vivid green and blue copper-bearing tourmalines at a mine in northeastern Brazil, Emmanuel Fritsch headed...Ia diamonds are typically a product of the Argyle mine in Australia (King et al., 2002). Type Ib diamonds...come from India and the Cullinan (formerly Premier) mine in South Africa (King et al., 1998). HOW DO SCIENTISTS |
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| ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) or secondary ion mass spectrometry (SIMS)...the curved outer surfaces of the eight anvils. A graphite element is used to heat the chamber. Typical diamond...Strong and Wentorf, 1971; Wentorf, 1971). Powdered graphite dissolves in the molten metal solvent in the hotter...Consultation Service (http://oami.eu.int/search/trademark/la/en_tm_ search.cfm). Patent status was based on records...tourmaline for a short period in 1978, until the mine was abandoned due to flooding. During recent field |
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| News International • Australia’s Ellendale diamond mine opens • Aquamarine and spessartine from Tanzania...from the Erongo Mountains, Namibia • New morganite mine in Madagascar • Namibian gem localities • New opals...diamonds shown here are from Canada’s Ekati Diamond Mine™, which started production in 1998. The necklace...the opening of Canada’s first diamond mine, the Ekati Diamond Mine™, in 1998, but a number of other projects...enter the world market came from the Ekati Diamond Mine™, which opened in 1998 after decades of exploration |
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| removes it from a shovel being shipped to another mine, there are apt to be some good performance reasons...Elektkougnar Stein et Roubaix, Paris... BELGIUM: - SPAIN: REG. T ™ Lectromelt . . . SWEDEN: Sydney......WORLD “CAT” BULLDOZER... Working at a molybdenum mine near Climax, Colorado, which produces most of the...ore into hole leading to mine tunnel. They also operate dragline in the mine tunnel. Their ability to...matching No. 7S blades are “dozing molybdenum in a mine near Climax, Colorado. Their tough “dozers take |
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| beryl in the world: the Ruby Violet (or Red Beryl) mine in Utah’s Wah Wah Mountains. Shown here is a unique...pressure and temperature conditions initially in the graphite-stable region (similar to those commonly used...Fancy black (right) after HPHT annealing in the graphite-stable region. The sample broke into two pieces...brown (left). After HPHT annealing, first at the graphite-stable region and then at the diamond-stable region...synthetic diamond substrate. Note the precipitation of graphite and non-diamond carbon around the crystal that |
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| Pasco Atacocha Huaron Morococha Casapalca South of La Oroya Huancavelica· Cobriza Conclusion 115 119 122...Arequipa Puno 193 197 SMELTING AND REFINING 203 La Oroya Ilo SOGESA 203 211 213 PART III: 10 11 ...Effect on Balance of Payments of Spending by a Sample Mine 281 Operations of a Mixed Company 303 Xl PART...form the northern end of the former Cordillera de la Costa. This range, which to the south has sunk beneath...Blanca. From Canete southward 0 the Cordillera de la Costa reappears from the sea (the width of the continental |
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| From December 1998 to February 2001, I was the mine manager of Khan River Mining & Exploration (Pty...the trade (prior to the discovery of the Argyle mine in Australia) or were documented by gemological...(Hart, 2000). Beginning in the 1940s, the Williamson mine in Tanzania produced a small number of pink diamonds...diamonds are known from there. On occasion, the Premier mine near Johannesburg in South Africa has produced pink...1980s on, however, the supply coming from the Argyle mine in Australia greatly increased the availability |
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| る｡2)〜4)の が あ ろ う｡ タ イ プ で は,2)が ②(La)N=SO‑‑130,(Yb)N=3〜5,(La/Yb)N=12 〜53と 重 希 土 の 減 少 が 大 き い｡こ れ...の網 状 鉱 体,そ れ ら の 騨S値 以 下 の とお り で あ る｡LaPaz地 Matilde=十13.1〜 余 市 鉱 山豊 丘 地 域 は 西 南 北 海 道 の い わ ゆ る グ...中 の 流 体 包 有 物 中 の塩 濃 度 と δ34S値 る｡し 新 世,そ 域 のMatilde鉱 富 む｡ 者 の 年 代 は 鉱 床 母 岩 の絹 雲 母 化 作 用 の 時 期 を...な い｡ calcite‑rutile‑sphene‑pyrite‑pyrrhotite‑graphiteを 含 むpeliteの こ で は 圧 力 依 存 性 を検 討 す る｡ 圧 力 に |
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| Nigeria, and Mozambique: Chemical Fingerprinting by LA-ICP-MS Ahmadjan Abduriyim, Hiroshi Kitawaki, Masashi...separated on the basis of chemical data provided by LA-ICP-MS. The “eye” in this parrot brooch is a 7 ct...tourmaline, morganite, kunzite, and other gems with the mine owners and famous scientists in attendance. Symposium...NIGERIA, AND MOZAMBIQUE: CHEMICAL FINGERPRINTING BY LA-ICP-MS Ahmadjan Abduriyim, Hiroshi Kitawaki, Masashi... However, quantitative chemical data obtained by LA-ICP-MS show that tourmalines from the three countries |
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| Gray-to-Blue-to-Violet Hydrogen-Rich Diamonds from The Argyle Mine, Australia Carolyn H. van der Bogert, Christopher...Nigeria, and Mozambique: Chemical Fingerprinting by LA-ICP-MS Identification and Durability of Lead Glass–Filled...Shell and Its Imitations Summer 2006 Applications of LA-ICP-MS to Gemology The Cullinan Diamond Centennial...speculated that the diamond came from the Kollur mine near Golconda. It was cut to preserve weight at...of finance, dubbed the stone the Diamant Bleu de la Couronne (Blue Diamond of the Crown). As with Tavernier |
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| Ferguson, Ailzen, SC; Mark A. Ferreira, Mandeville, LA; William W. Fleischinann, Seaford, NY; Diane Flora...Betty Lu Frost, Longinont, CO; Amaya Garin, Madrid, Spain; Benito Giacintucci, Florence, Italy; Wilma van...Louis, MO; Maria Isabel Cereijo Hierro, Madrid, Spain; Lorraine J. Hilleshiem, Sun Prairie, WI; Virginia...Jarfalla, Sweden; Consuelo LaspraGarcia, Oviedo, Spain; Bert J. Last, Sydney, NSW, Australia; Becky Sue...Mathias, Naticlz, MA; Mary M. Maxwell, Wheeling, WV; Matilde Paolini McAfee, New Haven, CT; Glen McCaughtrie |
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| Decree 14549, April 26, 1977, establishing National Mine Exploration Fund (translation of Fondo Nacional...in 1974 in the Departments of Potosi, Oruro, and La Paz by producers in the Small Mining subsector.....subsector to BAMIN agencies in the Departments of La Paz, Oruro, and Potosi classified by weight categories...sales in 1974 to BAMIN agencies in the Departments of La Paz, Oruro, and Potosi classified by weight categories...of known mines, producers, and inactive mines in La Paz and Potosi Departments (tin only).... 38 A |
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| (1992) Etude de la variation de l’aspect de pierres taillées à l’aide d’images de synthèse. La Gemmologia...for computing the optimum cut proportions of gems. La Gemmologia, Vol. 25, No. 3–4, pp. 23–32. Tolkowsky...tuberculata (Fankboner, 1991, 1995). Four decades later, La Place Bostwick claimed to have cultured both blister...Koala Gem News Figure 2. The historic Four Peaks mine in Arizona is again producing amethyst. These brilliant...26 to 5.41 ct. Construction at the Ekati diamond mine is nearly complete, and the first production is |
