 | | Journal (article/letter/editorial) | | Geosciences, Auburn University, Auburn, AL 36849, USA Department of Geology and Environmental Earth Science...Science, Miami University, Oxford, OH 45056, USA; burkeml2@miamioh.edu Correspondence: saundja@auburn.edu;...development of new analytical technologies, lab experiments, and the discovery of new epithermal deposits...discovery of nanoparticulate textures [12â14], gave new impetus to the concept that gold-colloid the topic...discovery of nanoparticulate textures [12â14], gave new impetus to the concept that proposed that gold and |  | | Journal (article/letter/editorial) | | Miocene bonanza epithermal ores from northern Nevada, USA James A. Saunders 1 & Michelle Burke 2 & Matthew...handling: B. Lehmann * James A. Saunders 1 Auburn, AL, USA 2 Department of Geology and Environmental Earth...University, 118 Shideler Hall,, Oxford, OH 45056, USA 3 Department of Geology, Kansas State University...University, 108 Thompson Hall,, Manhattan, KS 66506, USA they must be dispersed in a stable manner in another...scales in some NV LS ore systems. Here, we present new scanning electron microscopy (SEM) images of electrum |  | | Journal (article/letter/editorial) | | Virginia 22030, USA AND G. M. LOIACONO Philips Laboratories, Briarcliff Manor, New York 10510, USA (Received...Washington, DC, USA and the Department of Geology, Lafayette College, Easton, Pennsylvania, USA. The samples...locality; SI-B18862: adularia, Austria; SI-B18938: orthoclase, Madagascar; LC-5491: adularia, Tavetsch, Switzerland...approximately l0 -2 of s-quartz. The Tavetsch adularia (LC5491) gave a positive response and exhibited...noted that this sample was the most 'classical' adularia specimen in the sample suite. Its chemistry was |  | | Journal (article/letter/editorial) | | porphyry copper and epithermal vein deposits of adularia-sericite type develop successively under different...coeval high-level stocks in the root zones of many adularia-sericite deposits suggests that circulation of...arc, emplacement of magmatic sills at depth and adularia-sericite type gold mineralization are genetically...resume following porphyry copper mineralization, adularia-sericite epithermal gold mineralization, or continued...Wafi in Papua New Guinea (Leach & Erceg, 1990) and Lahoca in Hungary (Panto, 1951). Adularia-sericite epithermal |  | | Journal (article/letter/editorial) | | Paleozoic Feldspar (Adularia) in a Precambrian Basement Core from Scioto County, Ohio, USA Teresa M. Mensing...The Ohio State University, Columbus Ohio 43210, USA Abstract. Fourte,en core samples of Precambrian...low-temperature hydrothermal conditions as K-feldspar (adularia) by reactions with brines derived from the overlying...mineral is probably the low-temperature K-feldspar adularia. Fanre and BarNs (in press) reported R b - Sr...date for the lower section of the core, where adularia is not present, is a reliable measure of the age |  | SCHMIEDER, Martin, BUCHNER, Elmar, SCHWARZ, Winfried H., TRIELOFF, Mario, LAMBERT, Philippe (2010) A Rhaetian 40Ar/39Ar age for the Rochechouart impact structure (France) and implications for the latest Triassic sedimentary record. Meteoritics & Planetary Science, 45 (8) 1225-1242 doi:10.1111/j.1945-5100.2010.01070.x | Journal (article/letter/editorial) | | K-metasomatism in the Rochechouart impactites. The new age value is distinctly younger than the previously...Dakota, USA), as well as possibly Wells Creek (Tennessee, USA) and Newporte (North Dakota, USA; Spray...formation and vice-versa). In this study, we present new 40Ar â 39Ar age data for the Rochechouart impact...ââsecondaryââ idiomorphic K-feldspar of the morphological adularia type grown along rims of cavities (Figs. 3D, 4...secondary idiomorphic crystals of K-feldspar (adularia; Adu) grown in a cavity (cross polarized light) |  | Saunders, J. A., Unger, D. L., Kamenov, G. D., Fayek, M., Hames, W. E., Utterback, W. C. (2008) Genesis of Middle Miocene Yellowstone hotspot-related bonanza epithermal AuâAg deposits, Northern Great Basin, USA. Mineralium Deposita, 43 (7) 715-734 doi:10.1007/s00126-008-0201-7 | Journal (article/letter/editorial) | | epithermal AuâAg deposits, Northern Great Basin, USA J. A. Saunders & D. L. Unger & G. D. Kamenov & M...primarily of meta-sedimentary or granitic origin, adularia-rich gold mineralization formed. Where glassy...Auburn University, 210 Petrie Hall, Auburn, AL 36849, USA e-mail: saundja@auburn.edu G. D. Kamenov Department...Williamson Hall, P.O. Box 112120, Gainesville, FL 32611, USA M. Fayek Department of Geological Sciences, University...89445, USA Present address: D. L. Unger Victoria Resources, 240 S. Rock Blvd., Reno, NV 89502, USA textures |  | SolĂ©, JesĂșs, Pi-Puig, Teresa, Ortega-Rivera, Amabel (2021) A Mineralogical, Geochemical, and Geochronological Study of âValencianiteâ from La Valenciana Mine, Guanajuato, Mexico. Minerals, 11 (7) 741 doi:10.3390/min11070741 | Journal (article/letter/editorial) | | has been described as a variety of K-feldspar (adularia) from La Valenciana mine, Guanajuato, Mexico,...three samples were used for this study. We present new major and trace element analysis, X-ray powder diffraction...major works on feldspars and relevant papers from adularia shows that the structure of this mineral has monoclinic...literature data show some extreme structural states for adularia obtained in the pre-Rietveld refinement era; these...pure orthoclase composition, as is common in most adularia crystals, although compositions up to Or90 Ab10 |  | | Journal (article/letter/editorial) | | Geology,Auburn University,Auburn, AL 3684%5305, USA Received: 29 November 1993/Accepted: 23 May 1994...samples below the bonanza zones: gold, chalcedony, adularia, pyrite, chalcopyrite, and acanthite. The calculated...1994). These gold-rich deposits best fit the "adularia-sericite" class of Heald et al. (1987) or the...more common and better documented silver-rich adularia-sericite deposits of the Western Americas such...differences in ore mineralogy, perhaps a subdivision of adularia-sericite deposits is warranted. Thus, we propose |  | | Journal (article/letter/editorial) | | quartz replacement textures and quartz veins with adularia crystals are indicative of boiling processes in...by the 40Ar/39Ar multiple step heat method in adularia crystals; the resulting age 252.7 ± 1.3 Ma (Mugas...Fig. 2 (a) Quartz vein from Stage I. (b) QuartzâAdulariaâGoethite (QzâAdlâGth) vein form Stage II. (c)...crustiform, massive, bladed and cockade quartz + adularia veinlets with variable quantities of partially...limonitized pyrite, 50 ÎŒm in size. The pinkish-orange adularia crystals are visible in hand specimen (size up |  | Grancea, Luminita, Bailly, Laurent, Leroy, Jacques, Banks, David, Marcoux, Eric, MilĂ©si, Jean, Cuney, Michel, AndrĂ©, Anne, Istvan, Dumitru, Fabre, CĂ©cile (2002) Fluid evolution in the Baia Mare epithermal gold/polymetallic district, Inner Carpathians, Romania. Mineralium Deposita, 37 (6) 630-647 doi:10.1007/s00126-002-0276-5 | Journal (article/letter/editorial) | | have many features typical of low-sulïŹdation (or adularia-sericite) epithermal deposits. The combination...on our personal observations. This is followed by new investigations on the geochemical features of the...district have features typical of low sulïŹdation- or adularia sericite-type epithermal systems (Heald et al...tungstates (wolframite, scheelite), with quartz, adularia, clay minerals, carbonates, rhodonite and barite...deposits are also characterized by the dominance of adularia-sericite alteration bordering siliciïŹed zones |  | | Journal (article/letter/editorial) | | Electrum is highly concentrated in the finest quartzâadularia colloform micro-bands, which fill joints with...deposited in open space on the surfaces of some quartzâadularia bands, due to a condensation of gaseous phase...fluids. We found that the electrum-rich quartzâadularia micro-banding is enriched (in descending order)...Colloform-banded textures . Epithermal gold . Vein adularia . Vein quartz . Bulgaria . Khan Krum deposit ...sphaleriteâwurtzite colloform textures from leadâzinc ores in the USA and Europe as formed via direct crystallization from |  | Voudouris, Panagiotis, Melfos, Vasilios, Mavrogonatos, Constantinos, Tarantola, Alexandre, GÓ§tze, Jens, Alfieris, Dimitrios, Maneta, Victoria, Psimis, Ioannis (2018) Amethyst Occurrences in Tertiary Volcanic Rocks of Greece: Mineralogical, Fluid Inclusion and Oxygen Isotope Constraints on Their Genesis. Minerals, 8 (8) 324 doi:10.3390/min8080324 | Journal (article/letter/editorial) | | the quartz veins includes sericitic, K-feldspar (adularia), propylitic and zeolitic types. Precipitation...indicated by the presence of various amounts of gangue adularia, calcite, zeolites, chlorite and smectite. Fluid... This work summarizes earlier work and presents new geological, mineralogical, microthermometric and...sericitic and and K-feldspar K-feldspar epithermal (adularia) altered andesitic/dacitic lavas and pyroclastics...(Figures 1c and 3a,b). The amethyst in the the (adularia) altered andesitic/dacitic lavas and pyroclastics |  | | Journal (article/letter/editorial) | | (Hoshizumi et al., 1988). According to a report of the New Energy Development Organization (NEDO, 1990) the...smectite, I/S illite/smectite mixed layers, KFSP adularia, ST stilbite, P Y pyrite, Ti titanite, CHL chloritic...corresponds to the subtraction of about 27.8 g of adularia (corresponding approximately to 0.1 mole) from...GSB-250 (dry rock) after subtraction of 0.I mole of adularia A) GSB-49 GSB-100 GSB-150 GSB-200 GSB-250...Zone of Lateral Flow 255 shows that authigenic adularia occupies about 25~o of the volume of the breccia |  | | Journal (article/letter/editorial) | | fractures formed at 250 to 290 ~ C. A generation of adularia-bearing veins precipitated at 140 to 230 ~ C,...convective cooling in the Archean. Hematite and adularia fracture fillings correspond to a stage when meteoric...homogeneous granite located 10 cm from a narrow adularia-bearing fracture. Fresh granite possesses uniform...selvage; d breccia zone cemented by hematite; e adularia-chlorite- quartz fracture fill assemblage; f clay...Chlorite (Ch2) Calcite Calcite-fluome Adularia Adularia-chloritequartz-calcite Gypsum Gypsum +_goethite |  | | Journal (article/letter/editorial) | | progression through adularia±sericite, argillic, and propylitic zones. The presence of adularia and sericite...association, suggests that the gold deposit is of the ``adularia-sericite'' or ``low sulÂźdation'' type. The East...However, few publications exist that describe these new gold Editorial handling: O. Christensen C. Wang (&)...of the City University of New York, 365 Fifth Avenue, New York, NY 10016, USA E-mail: wangcz@hotmail.com...highly-siliciÂźed zone (the quartz ore body), an adularia±sericite zone, an argillic zone, and an propylitic |  | | Journal (article/letter/editorial) | | USGS-MS 973; Box 25046, DFC; Lakewood, CO 80225 USA Phone: 303-236-5591 1 ACCEPTED MANUSCRIPT Geochemical...assemblages for the first type typically include quartz, adularia, calcite, and illite; representative deposits...deposits, commonly referred to as the quartz-adularia type, are generally synonymous with the low- to intermediate-sulfidation...host epithermal deposits; 78 percent of quartz-adularia epithermal deposits are lava-flow hosted, whereas...30 percent for the rocks associated with quartz-adularia and quartzalunite deposits, respectively. Euhedral |  | | Journal (article/letter/editorial) | | quartz,chlorite,adularia,illitc, andpyrite, suggesting that the depositis of adularia-sericite type. An...pyroclasticrocksof Oligocene- Theyconsist ordinate K feldspar (adularia) and illitc, are locally Miocene age, is unconformablyoverlain...Hul -- Heulandite,Ill = Illite, Kfs= K feldspar(adularia), Kin -- kaolinite,Lmt -- laumontite,Mgh -- maghemite...cores.Abbreviations:Ep = epidote, Kfs = K feldspar(adularia),Kin -- kaolinitc, Py -- pyrite, Sw = swelling...amountof calcite, and the appearanceof K feldspar (adularia)and illite as the vein is approached (Fig. 10) |  | Catchpole, Honza, Kouzmanov, Kalin, BendezĂș, Aldo, Ovtcharova, Maria, Spikings, Richard, Stein, Holly, FontbotĂ©, LluĂs (2015) Timing of porphyry (Cu-Mo) and base metal (Zn-Pb-Ag-Cu) mineralisation in a magmatic-hydrothermal systemâMorococha district, Peru. Mineralium Deposita, 50 (8) 895-922 doi:10.1007/s00126-014-0564-x | Journal (article/letter/editorial) | | Colorado State University, Fort Collins, CO 80523-1482, USA e-mail: Holly.Stein@colostate.edu H. Stein Centre...in the base metal vein and replacement bodies and new Re-Os and 40Ar/39Ar ages for skarn and porphyry mineralisation...al. 1998, 2001), and Main Stage veins in Butte, USA (Meyer et al. 1968). Precise geochronology of different...Pimentel (2006). The vertical exaggeration is 1.8. New radiogenic isotope ages (this study) for different...(2012) and BendezĂș (2014) personal communication b New age for Gertrudis skarn that replaces older minimum |  | Zeng, Nanshi, Izawa, Eiji, Watanabe, Koichiro, Motomura, Yoshinobu (2010) Hydrothermal Alteration Related to Silver Mineralization at the Iwami Silver Deposit, Shimane Prefecture, Japan. Resource Geology, 60 (3) 234-248 doi:10.1111/j.1751-3928.2010.00129.x | Journal (article/letter/editorial) | | broad smectite zone. Because of boiling, abundant adularia associated with silver mineralization overlaps...exploration were not successful in the discovery of new silver veins, re-assessment of the mineralization...40Ar/39Ar dating was carried out using biotite and adularia. A least-altered dacite sample (02081012) and...smectite. The sample 22-2 contains a large amount of adularia with a small amount of illite. The samples were...and stained by chemicals to clarify the part of adularia. The rock slices were crushed, and the yellow |  | | Journal (article/letter/editorial) | | breccia and veins. Additionally, the occurrence of adularia and bladed calcite in high-grade ore zones and...central zone with a mineral assemblage of quartz, adularia, illite, illite/smectite ± pyrite ± carbonate...metal sulïŹdes + silver sulfosalts (2B), quartzâadularia (2C), and carbonate (2D)-cemented breccias and...breccias and veins typiïŹed by zones of quartzâadularia, sericite and carbonate alteration contain variable...quartz, followed in turn by elongate quartz and adularia, exhibiting cockade and plumose textures. Repetition |  | | Journal (article/letter/editorial) | | of Geosciences, Oregon State University OR 97370, USA 3 Australian Research Council Centre of Excellence...hydrosphere followed by Cu, Au, Ag, etc. forming quartzâadularia system Loss of volatiles or entire system if...at the Ridgeway alkalic porphyry AuâCu deposit (New South Wales, Australia). (B) Intense multi-generational...porphyry CuâAu deposit (Chile). (E) Banded quartzâadulariaâillite vein containing dark bands of pyrargarite...hypogene mineral assemblages: (1) quartz ± calcite ± adularia ± illite (Figs. 4b and 6a) and (2) quartz + alunite |  | | Journal (article/letter/editorial) | | and silver are present in the ores. 13 Quartz, adularia and clay minerals (illite-montmorillonite) with...3b-e). 215 Silica, chlorite, calcite, sericite, adularia (Fig. 3f) and weak argillic (illite-montmorillonite)...minerals progressed from illite-quartz to quartz-adularia, carbonate and finally 219 gypsum dominated...concentric zoning pattern. The quartz-adularia (quartz, adularia and 222 pyrite) and sericite (illite...mineralizing system (fig. 10a). 472 The occurrence of adularia, bladed calcite, and vapor-rich two-phase inclusions |  | | Journal (article/letter/editorial) | | T. Surrrr, RensselaerPolytechnicInstitute, Troy, New yorh. ABsrRAcr Thermal studies were conducted on...orthoclase and twenty for microcline. A comparison of adularia, orthoclase and microcline is presented. INrnooucronv...was a large, flesh-colored crystal from Bedford, New York. Its density is d.2o:2.544and the refractive indices...parallel to o closely approximate similar values for adularia (3). The coefficientsparallel to D and c are somewhat...orientation from 800" to 1000o, while all values for adularia decreasefrom 900" to 1000'. The expansion values |  | | Journal (article/letter/editorial) | | November 2014 of Occurrences St. Lawrence County New York Part 5: The Prehnite Occurrence on the Russell-Hermon...3140 CeC Center for Mineralogy New York State Museum Albany, New York 12230 sccham2@yahoo.com MICHAel...MICHAel WAlTeR PO Box 137 Nicholville, New York 12965 mwalter9@twcny.rr.com MARIAN lUPUleSCU 3140 CeC Research...Research and Collections New York State Museum Albany, New York 12230 mlupules@mail.nysed.gov 540 ROCKS...with pink adularia, green prehnite, and gray quartz; 7.5 cm. Kenneth Hollmann collection, New York State |
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Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA