 | | Journal (issue) | | Cairncross & C. R. Anhaeusser Minerals of the Linwood mine, Scott County, Iowa ............. 231 by P. L. Garvin...M. Crawford Famous mineral localities: Hiendelaencina, Spain ............... 241 by M. Calvo & E. Sevillano...in the still open underground workings of the Gem mine. He encountered an open pocket containing well formed...camps he would visit. He would typically stop in Santa Eulalia, Charcas, Mapami, Durango and Guanajuato...conglomerate. The stories of these early discoveries and mine developments, some of which were conducted under | | | Journal (issue) | | Cairncross & C. R. Anhaeusser Minerals of the Linwood mine, Scott County,Iowa ..................... 231 by...M. Crawford Famous mineral localities: Hiendelaencina,Spain .........................241 by M. Calvo...M o n t B lanc, C h a m o n ix , F ran ce. T h e la rg e st flu o rite cry stals m e a s u re 2.9 cm...in the still open underground workings of the Gem mine. He encountered an open pocket containing well formed...camps he would visit. He would typically stop in Santa Eulalia, Charcas, Mapami, Durango and Guanajuato |  | | Journal (article/letter/editorial) | | progradesensefrom the actinolite zone at Juanirato the biotite-mnscovitezone at Gracicla. In massivesulfide specimensit...Metmnorphic equilibration was reached only in the biotite-muscovite zone at Graciela.This is demonstratedby...wasavailableto the authorconcerningtheKuroko-type deposits at La PlataandMacuchi.TheLa Platadepositwasevaluated in...Graciela open pit, and from the Elenita and Santa Cecilia mines has been carried out by the author intermittently...ppm Ag. The existing mills at Graciela and Santa Cecilia canproduceabout 150 tons/dayof Zn concentrate |  | | Journal (article/letter/editorial) | | and magnetite, which formed at the expense of biotite. A relatively minor, shallowly inclined zone of...-26°30’ ESPERANZA Argentina Chile Antofagasta LA COIPA Fig. 2 PUREN Copiapó Maricunga belt CASPICHE...VELADERO EL INDIO -30° -30° El Indio belt LOBO LA PEPA VOLCAN PANTANILLOS Santiago -70° -27°30’...deposits, including those at Marte, Lobo, Refugio, La Pepa, and Volcán (Fig. 2), typically contain gold...the topographically and visually prominent Santa Cecilia alteration zone, from which it is separated |  | | Journal (article/letter/editorial) | | principalmineralizedcentersin the belt, includingthe La Coipa,La Pepa,Marte, andLobodeposits, weredatedradiometrically...out4,000 to 6,000 fugio,gold-copper-silver Santa Cecilia, and gold at Pantanillos(Fig. 1). m abovesealevel...Kay et al. (1988) between La Coipasilver-gold(Oviedoet al., 1991) andthe La latitudes 28 ø S and 33 ø...0 km I I 30 I LA COIPA/24-20) - 27" MARTE(14-13) .• \.•../ LOBO(13)' i LA PEPA I L ß PANTANILLOS...REFUGIO (23) / HYDROTHERMAL ALTERATION ZONE SANTA CECILIA MIDDLE-LATE MIOCENE VOLCANICS REVERSE FAULT |  | | Journal (article/letter/editorial) | | alteration,whichcarriesbarite, nativesulfur,enargite,andat La Pepa,high-grade,vein-type goldmineralizationof highsulfidation...(Esprobablywill increasethistotalsubstantially. peranza, La Coipa) is mostcloselyrelated to dacite The name"Maricungabelt"...96 g/metricton Au in the Verde sector. La Coipa gold-silverand La Pepa gold prospects (Fig. 3) were not...AngloAmericanComincojoint venture. La Coipa, near the site of a long-abandonedvein silver mine, was discoveredin 1981...averaging 1.2 g/metric ton Miocenevolcano ß Au-Ag-(Cu)mine Au and133 g/metrictonAg, cameon streamin 1989 with |  | | Book | | On a spectacular find of crocoite in the Adelaide mine, Dundas, Tasmania (by A. H. Chapman) 3:111-113 ADOLFSSON...gysinite-(Nd) and other rare minerals from [the Santa Lucia and Sa Duchessa mines,] Sardinia [Italy] (by...AJO Famous mineral localities: the New Cornelia mine, Ajo, Arizona (by W. J. Thomas & R. B. Gibbs) 14:283-298...Bancroft, Ontario: an occurrence of large nepheline, biotite and albite-antiperthite crystals in calcite-cored...ALLEN, GEORGE B. --and W. Hunt: The Tonopah-Belmont mine, Maricopa County, Arizona 19:139-144 ALLGOOD, GENNE |  | Bugueño, Felipe, Calle-Gardella, Daniela, Comte, Diana, Reyes-Wagner, Valentina, Ojeda, Marcia, Rietbrock, Andreas, Roecker, Steven (2022) Subsurface Insights of the Maricunga Gold Belt through Local Earthquake Tomography. Minerals, 12 (11) 1437 doi:10.3390/min12111437 | Journal (article/letter/editorial) | | Oligocene–early Miocene (24–22 Ma) period, when La Pepa, Refugio, Santa Cecilia, and Pantanillo deposits were emplaced...model are shown (Figures 4–6) crossing through the La Coipa (26◦ 490 ), Marte (27◦ 100 ), and Cerro Casale...shown (Figures 4– 7 of 12 6) crossing through the La Coipa (26°49′), Marte (27°10′), and Cerro Casale...01) 0.01) passing passing through through the theLa La ◦ 490 ) (see Coipadeposit deposit(26 (26°49′) (see...Marte mine is marked with a black arrow. The location of the MB is marked with red letters. mine is marked |  | | Journal (article/letter/editorial) | | border consists of sericite, adularia, quartz and biotite, and the outward zone consists of chlorite, sericite...hydrothermal alteration characterized by veinlets with biotite, chlorite and lesser K-feldspar and quartz. Mineralization...and sulphur veinlets, which cross-cut earlier biotite, chlorite, quartz 20 km I and sulphur veins...(actually in operation) and Potrerillos (abandoned mine) ore bodies. Fig. 4. Geological sketch map of the...dissemination. This stage consists of K-feldspar, biotite, anhydrite, chalcopyrite, bornite and pyrite. It |  | Tistl, M., Burgath, K.P., Höhndorf, A., Kreuzer, H., Muñoz, R., Salinas, R. (1994) Origin and emplacement of Tertiary ultramafic complexes in northwest Colombia: Evidence from geochemistry and KAr, SmNd and RbSr isotopes. Earth and Planetary Science Letters, 126 (1) 41-59 doi:10.1016/0012-821x(94)90241-0 | Journal (article/letter/editorial) | | Tertiary island arc (Dabeiba volcanic arc [17], Santa Cecilia-La Equis complex [18]) with tholeiitic and calc-alkaline...complexes occur near the suture between the Santa Cecilia-La Equis arc and the Cafiasgordas Group. 43...hornblende hornfels, and to a lesser extent by biotite-andalusite hornfels and knotenschiefer, depending...hornblende displays very little alteration to biotite a n d / o r chlorite, although pyroxene inter-...ratios were normalized to 146Nd/laaNd = 0.7219; the La Jolla Nd isotopic standard was measured to 0.511878 |  | | Journal (article/letter/editorial) | | Servicio Nacional de Geologia y Mineria, Avenida Santa Maria 0104, Santiago, Chile c Department of Geological...Servicio Nacional de Geologia y Mineria, Avenida Santa Maria 0104, Santiago, Chile Version of record first...Servicio Nacional de Geologia y Mineria, Avenida Santa Maria 0104, Santiago, Chile ANDREW TITTLER, Downloaded...Servicio Nacional de Geologia y Mineria, Avenida Santa Maria 0104, Santiago, Chile Abstract Late Oligocene-Early...trace-element chemical signatures (e.g., extreme La/ Yb ratios and high Na 2 0 and Sr concentrations) |  | | Journal (article/letter/editorial) | | (density, porosity,BC water and near the pond of Santa the Tuvixeddu considered thecomposilargest mechanical...century BC (e.g., founding ports near the pond of Santa Gilla, creating the Tuvixeddu necropolis, considered...the city became the village of Santa Igia (contraction of Santa Cecilia). when the centre of the city...city became the village of Santa Igia (contraction of Santa Cecilia). Subsequently, Subsequently,with withthe...village of Santa Igia (1258), the centre of Cagliari became the current fortified district of of Santa Igia |  | | Book | | Crystals up to 140mm (5½ in) long occurred in the Ray mine and in Bisbee, Arizona, USA. Very fine spinel-law...100 mm (4 in) long, come also from the San Genaro Mine in Huancavelica and Uchucchaqua, Peru. New finds...Dorado, California, US.A. Gold, 68 mm, Eagle's Nest Mine, California, US.A. Gold gold on it. Typical aggregates...many localities in California, USA (Colorado Quartz mine, Nigger Hill and others). Fine leaf gold comes from...mm (4 5/i6 in) long were very rare in Ground Hog mine, Gilman, Colorado, USA. The largest known sheets |  | | Book | | Crystals up to 140mm (5'A in) long occurred in the Ray mine and in Bisbce, Arizona, USA. Very fine spincl-law...100 mm (4 in) long, come also from the San Gcnaro Mine in Huancavclica and Uchucchaqua, Peru. New finds...many localities in California, USA (Colorado Quartz mine. Nigger Hill and others). Fine leaf gold comes from...110 mm (47.6 in) long were very rare in Ground Hog mine, Gilman, Colorado, USA. The largest known sheets...of crystallized gold occurred in the Jamestow n mine. California, USA, where a cavity, which yielded |  | | Book | | Gorgona Island, Chocó Arc, Sierra Nevada de Santa Marta, La Macarena, and the Guiana Shield: remote regions...Geologie und Petrographie der Sierra Nevada de Santa Marta (Kolumbien, Südamarika). Schweiz, Mineralogische...E.) Geochemical Journal v. 15 p. 141–161. 2000 – La Macarena, Massagno, Switzerland (self-published)...(self-published), 111 p. Biographies Augusto Gansser (2000) La moglie di un geólogo, 2nd edn Massagno, Switzerland...the basis for the self-published biographical work “La moglie di un geologo: Augusto Gansser.” Acknowledgments |  | Gurbanov, A. G., Bogatikov, O. A., Dokuchaev, A. Ya., Gazeev, V. M., Abramov, S. S., Groznova, E. O., Shevchenko, A. V. (2008) Ore-bearing hydrothermal metasomatic processes in the Elbrus volcanic center, the northern Caucasus, Russia. Geology of Ore Deposits, 50 (3) 199-217 doi:10.1134/s1075701508030033 | Journal (article/letter/editorial) | | cap commonly covers the subvolcanic bodies (Marte, La Pepa, Valle, and other gold deposits); at some deposits...lac acie u Gl i Gla cier Aza bash ater lG la Te rs ko l ci Gl er ac ier Iri cie Gla...silicification and argillic alteration. Two generations of biotite were established. The large relict grains of the...feldspar, quartz, zoisite, and ilmenite. Small biotite flakes of the second generation are commonly surrounded...and superimposed on the groundmass of rock and biotite phenocrysts. Large ilmenite crystals are commonly |  | | Report (issue) | | '•,.‘iti.,,.'-t1 :r_1.1-:.9..it, 0.4,'i— > iIk 4 !la •0 'J = .:I;f1 ,-"4 ‘1!d e'4311t'I 6 J l:? ;•C o...,':i4 .I" 1,. , !,• ,,',''''„,',,Vt.. t, •rA ,,, la ,i7,,..1,.,,,44,,, ,4'1,..,,.,'i,lin,,;:tir,iI1...gary ; Italy and Sardinia ; Norway ; Portugal ; Spain ; Sweden . 6 9 Asia : Asia Minor; China ; Dutch... : . . . " , t i I : - P .A-t,' $4 ' '' 44(r.:.•-lA •-• % 0 ' 0 . . ' . 1' ' ' ' . ' t o 1 1 . 1 1.....produced silver may be mentioned East Huel Rose lead mine (yield from 1852 to 1861 was 260,721 oz.), and West |  | | Journal (article/letter/editorial) | | 94305-2115 Abstract The Refugio, Aldebarán, and La Pepa districts in the Maricunga belt of northern...contain variable amounts of quartz, magnetite, biotite, and chalcopyrite and locally have K feldspar halos...elevations, barite. Of the three districts studied only La Pepa has mineable quartz-alunite ledges, which contain...Pancho deposit at Refugio and the Cavancha deposit at La Pepa are telescoped systems in which banded quartz...by equivalent 40Ar/39Ar dates on hydrothermal biotite associated with porphyry-style ore and alunite |  | | Report (issue) | | Geologicas Universidad Nacional de La Plata Calle 1, No. 644 1900 La Plata, Argentina SPECI/ml fJJPCB...Patagonian plutonic rocks are calcalkaline homblende-biotite granitoids, especially those in eastern Neuquen...1 Ma (British Antarctic Survey and Universidad de La Plata, unpublished data). These rocks have an evolved...P., 1988, Granitoides del Paleozoico-Triassico de la alta cordillera entre los 28° y 31° S; Manuscript...abundances of K, Rb, Th, and to a lesser extent Ce and La relative to SiC>2, increased from west to east away |  | | Book (volume) | | Sciences Universidad Complutense de Madrid Madrid, Spain José Tomás Oliveira Laboratório Nacional de Energia...recently published Geological Map of Portugal and Spain, 2015, scale 1:1,000,000. v vi Editors and Volume...Universidad de Jaén, Jaén, Spain Antonio Acosta-Vigil Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR),... Armilla, Granada, Spain Alexandra Afilhado Instituto Dom Luiz, Universidade de Lisboa, FCUL- Campo Grande...Ciencias de la Tierra (CEACTierra), Campus de Linares, Universidad de Jaén, Linares, Spain; Departamento |  | | Journal (article/letter/editorial) | | A-veinlets range from hairline streaks of magnetite ± biotite with minor quartz and chalcopyrite, and K feldspar...feldspar-oligoclase that changes outward to a biotite-rich zone. Total sulfide content, predominately...high-sulfidation epithermal gold-(silver) deposits (La Coipa, La Pepa) and porphyry gold-(copper) deposits (Refugio...(1974), La Coipa 27 o Marte Lobo Volcan Laguna Refugio 0 20 50 0 Volcan Copiapo La Pepa PERU... El Indio Belt (Miocene) Peru-Chile o Bajo de la Alumbrera (Late Miocene) Santiago Paleozoic-Triassic |  | FLORINDO, F, KARNER, D, MARRA, F, RENNE, P, ROBERTS, A, WEAVER, R (2007) Radioisotopic age constraints for Glacial Terminations IX and VII from aggradational sections of the Tiber River delta in Rome, Italy. Earth and Planetary Science Letters, 256 (1) 61-80 doi:10.1016/j.epsl.2007.01.014 | Journal (article/letter/editorial) | | leucite, sanidine, clinopyroxene, 69 and rare biotite. The deposit grades upward into a matrixsupported...component. Sanidine is common, while clinopyroxene, biotite and leucite are rare. Compared to sample Fig....15. 5.1.4. MIS 15 = Paleo-Tiber 4 section (= Santa Cecilia Formation) We interpret that a younger aggradational...Stratigrafia e assetto geologico dell'area romana, in “La Geologia di Roma. Il Centro Storico”, Mem. Descr |  | | Book | | . . . . . . . . 147 X Contents El Aguilar Mine: An Ordovician Sediment-Hosted Stratiform Lead-Zinc.... . . . . . . . . . . . . . . . . . . 175 The "La Helvecia" Pb, Zn, and Barite Deposit, Argentina A.... . . . . . . . . . . . . . . . . 279 Machcan Mine: A Pb-Zn Ore Deposit in Pucara Sediments of the... Contents Sulfur Isotope Studies in the Zinc-Lead Mine San Vicente, Central Peru H. Gorzawski, L. Fontbote... . . . . . . . . . . . . . . . . . . . . . 353 La Negra-Coquimbana Manganiferous District, Southern |  | | Book (volume) | | Iran ian P o rp h y ry C u-M o-A u D eposits Brent LA. Mclnnes, Noreen J. Evans, Frank Q, Fut Steve Garwin...lm alyk (K a rm ak y r-D a ln e e ) and S au k b u la k C u-A u P o rp h y ry System s, U zbekistan IgorM...containing >10 Mt Cu include Chuquicamata, El Abra, La Escondida and El Teniente in Chile, Cerro Colorado...derived from slab melts because of their high Sr/Y and La/Yb ratios, but Rabbia et al., (2002) and Richards...(Maksaev and Zentilli, 1988; Lindsay et a i, 1995), La Escondida (Richards, 1999; Richards e t a l , 1999 |  | | Report (issue) | | Prepared in cooperation with the Instituto Nacional para la Investigation de Recur so s Miner ales of Mexico...Mines and prospects_________________________._-_-__ Santa Gorgonia-San Pascual mining area. _________ El Arcabuz...Arcabuz prospect________________________ Buenavista mine _ __________!______________ Guadalupe adit._-__..._____________________ El Resquicio mine __________________________ La Salvadora prospect _ ____________________...___ Santa Gorgonia mine__ _ _____________________ Santo Tomas mine__ ________________________ La Luz-La |
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