 | Rodriguez-Galiano, V., Sanchez-Castillo, M., Chica-Olmo, M., Chica-Rivas, M. (2015) Machine learning predictive models for mineral prospectivity: An evaluation of neural networks, random forest, regression trees and support vector machines. Ore Geology Reviews, 71. 804-818 doi:10.1016/j.oregeorev.2015.01.001 | Journal (article/letter/editorial) | | Granada, Spain d Departamento de Análisis Matemático, Universidad de Granada, 18071 Granada, Spain b a r...epithermal Au prospectivity mapping of the Rodalquilar district, Spain, indicate that the RF outperformed the...mineral potential mapping in the Rodalquilar gold mining district (Spain). This district is a favourable...support system for gold potential mapping in the Rodalquilar–San Jose districts. Rigol-Sanchez et al. (2003)...model for gold prospectivity mapping in the Rodalquilar district. van der Meer (2006) and Bedini et al |  | | Report (issue) | | pyriterich such as at El Salvador, Chile; Rodalquilar, Spain and Goldfield, Nevada. Supergene alunite...zoning. Such acid-sulfate alteration may occur over adularia-sericite type base- and precious-metal ore deposits...Red Mountain, CO and Alunite Ridge, UT and over adularia-sericite type deposits as at Cactus, CA. INTRODUCTION...Arribas, Jr., currently studying the Rodalquilar district in Spain as part his Ph. D. program, and Jeff...environment might also overlie deeper porphyry-type or adularia-sericite type mineralization. Figure Ib represents |  | | Journal (article/letter/editorial) | | THE PALAI–ISLICA EPITHERMAL DEPOSIT, SOUTHEASTERN SPAIN F. JAVIER CARRILLO ROSÚA, SALVADOR MORALES RUANO§...E–18002 Granada, Spain ABSTRACT In the Palai–Islica deposit, in southeastern Spain, gold is found associated...gold–silver alloy, epithermal deposit, Palai–Islica, Spain. SOMMAIRE Dans le gisement de Palai–Islica, de...Gata – Cartagena volcanic belt in southeastern Spain (e.g., Arribas & Tosdal 1994, Morales et al. 2000...and is the only one that hosts gold deposits: Rodalquilar (Arribas et al. 1995), Los Alemanes Nuevos (Pineda |  | Arribas, Antonio, Rytuba, J.J., Rye, R.O., Cunningham, C.G., Podwysocki, M.H., Kelly, W.C., Arribas, Antonio, McKee, E.H., Smith, James G. (1989) Preliminary study of the ore deposits and hydrothermal alteration in the Rodalquilar caldera complex, southeastern Spain. Open-File Report Vol. 1989 (89-327) US Geological Survey doi:10.3133/ofr89327 | Report (issue) | | IN THE RCDALQUILAR CALDERA COMPLEX, SOUTHEASTERN SPAIN Antonio Arrihas Jr.l James J. Rytuba^ Robert O...37008, Spain PRELIMINARY STUDY OF THE ORE DEPOSITS AND HYDROTHERMAL ALTERATION IN THE RODALQUILAR CALDERA...CALDERA COMPLEX, SOUTHEASTERN SPAIN SUMMARY The Rodalquilar gold-alunite deposits are the first documented...Mineralization occurs in rhyolitic tuffs and domes of the Rodalquilar caldera complex in the Miocene Cabo de Gata volcanic...the ground surface. Ore deposits within the Rodalquilar complex consist of alunite, gold-alunite, and |  | | Journal (article/letter/editorial) | | characteristics of the Rodalquilar and two neighbouring epithermal gold deposits in Spain P. S~inger-von Oepen...form: August 16, 1990 Abstract. The operating Rodalquilar gold deposit and the abandoned Triunfo and Maria...km east of Almeria in SE Spain. While the gold mineralization at Rodalquilar is mainly controlled by caldera-tectonics...around the gold-mineralized vein structures at Rodalquilar ranges from advanced argillic alteration (porous...and 250~ However, the hydrothermal system at Rodalquilar was fed by a second fluid source. High-salinity |  | | Report (issue) | | overlie base- and precious metal veins of the adularia-sericite type with kaolinite-dominated alteration...acid-sulfate environments: Rodalquilar gold alunite deposit, Almeria, Spain The Rodalquilar gold-alunite deposit...deposit (Almeria, S.E. Spain) has recently been studied by Rytuba et al. (1988) and Arribas et al. (1988)...of Miocene hydrothermal systems in this part of Spain). The high 5D values reflect the proximity of the...hydrothermal system. This study is sponsored by the U.S./Spain Joint Committee for Scientific and Technical Cooperation |  | Arribas, Antonio, Cunningham, Charles G., Rytuba, James J., Rye, Robert O., Kelly, William C., Podwysocki, Melvin H., McKee, Edwin H., Tosdal, Richard M. (1995) Geology, geochronology, fluid inclusions, and isotope geochemistry of the Rodalquilar gold alunite deposit, Spain. Economic Geology, 90 (4) 795-822 doi:10.2113/gsecongeo.90.4.795 | Journal (article/letter/editorial) | | FluidInclusions, andIsotopeGeochemistry of the Rodalquilar GoldAluniteDeposit,Spain ANTONIOARRIBAS, JR.,* Department...94025 Abstract The Rodalquilar epithermalAu alunitedepositoccurswithinthe Rodalquilar calderacomplexin...Gatavolcanic fieldin southeastern Spain.The Rodalquilar caldera formedby eruption of therhyolitic Cintoash-flow...collapse andresurgence. Ore deposits withinthe Rodalquilar calderacomplex consist of low-sulfidation Pb-Zn-(Cu-Ag-Au)...the Cabode Gataregionstartedin the early THE Rodalquilar depositin southeastern Spainis the first epithermal |  | | Journal (article/letter/editorial) | | mineralization associated with the Rodalquilar epithermal gold-deposit in southeast Spain P. S~inger-von Oepen, G...Wfillnerstr. 2, D-5100 Aachen Abstract. At Rodalquilar gold mineralization is found in Late Tertiary...and an increase in f O 2 . All features of the Rodalquilar gold deposit reveal a close relationship to acid-sulfate-type...that Rodalquilar belongs to the acid-sulfate type. Mining of galena-quartz veins in the Rodalquilar area...which are bound to regional structures. The Rodalquilar gold deposit is located in the Sierra del Cabo |  | | Journal (article/letter/editorial) | | rhyolitic ash-flow tuffs, dikes, and domes, with adularia-sericite alteration accompanied by epithermal...alteration, and indicate that rhyolitic magmatism and adularia-sericite alteration with associated base-metal...andesitic to dacitic intrusions, and low-sulfidation (adularia-sericite) Au deposits with andesitic and rhyolitic...contrast, it has been more difficult to relate adularia-sericite deposits to specific magmas because they...Pre-caldera lavas Murga caldera 32.10 0.12 Ma (adularia) Pre-caldera lavas 32.16 0.30 Ma Chala |  | | Journal (article/letter/editorial) | | 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...mineral and its abundance (14 percent, quartz-adularia deposits; 17 percent, quartz-alunite deposits) |  | | Journal (article/letter/editorial) | | whicharepyriterichsuch asat E1Salvador, Chile;Rodalquilar, Spain;andGoldfield,Nevada.Supergene alunitenor-...andAlunite Ridge,Utah, and over or adjacentto adularia-sericite-typedepositsin volcanicdomesasat Cactus...• • / ,.-•"•-",,.) ACID SULFATE ENVIRONMENT ADULARIA-SERICITE EPITHERMAL ABOVE SYSTEM STEAM-HEATED...smallamountsof overlie deeper porphyry-typeor adularia-sericitequartz and hematiteoccurwith alunite in...predictthe stableisotopecompositions systemis of the adularia-sericite type. An overlying processes zoneof steam-heated |  | | Journal (article/letter/editorial) | | important. This scenario contrasts with that at Rodalquilar where Arribas et al. (1995) concluded that Sr...exploration level, Sacaramb 95-16 Altered andesite (adularia-sericite) associated with disseminated pyrite...and isotope geochemistry of the Rodalquilar gold alunite deposit, Spain. Econ Geol 90: 795± 822 Borcos |  | | Report (chapter) | | type, areassociated with either propylitic (+ adularia) or advanced argillic alteration, and cut mid-...Island of New Zealand, the Philippines, Fiji and Spain are described. They are commonly generated less...sericitization and silicification, commonly with adularia, bounding the veins. Propylitization is, however...quantities of pyrite, calcite, dolomite, barite, adularia, rhodochrosite, rhodonite and fluorite. production...veins and stockworks filled by quartz, calcite and adularia. Three northwest-trending vein zones are recognizable |  | | Journal (article/letter/editorial) | | monzonite intrusionsin the center of the caldera,and adularia-sericiteepithermalmineralization (the Emperorgolddeposit)on...entto inter- permeablestratigraphic units.An adularia-sericitemediate dikes, and in local "shatter zones"... concluded that 3.71 +_0.13 Ma is the date of adularia formation and thus the date of mineralization...givenits stratigraphic position.The reasonfor of adularia-sericite-style mineralization areindicated this...grainsizeandrecoilassociated andatBodie,California,adularia-sericite-style with irradiation. thermalactivityis |  | Echavarria, L., Nelson, E., Humphrey, J., Chavez, J., Escobedo, L., Iriondo, A. (2006) Geologic Evolution of the Caylloma Epithermal Vein District, Southern Peru. Economic Geology, 101 (4) 843-863 doi:10.2113/gsecongeo.101.4.843 | Journal (article/letter/editorial) | | hydrothermal alteration age of 18.35 ± 0.17 Ma (adularia in vein wall rock), and postmineralization ages...calcite, rhodonite, rhodochrosite, pyrite and minor adularia, illite, barite, and helvite. Ore minerals include...alteration types include silicification (quartz-adularia and quartz-illite) and propylitization (chlorite...pyrite, adularia, and illite, which constitute the following main alteration types: quartz-adularia (+ pyrite...illite). 0361-0128/98/000/000-00 $6.00 851 Quartz-adularia alteration is restricted to the country rock at |  | Imura, Takumi, Minami, Yusuke, Ohba, Tsukasa, Matsumoto, Akiko, Arribas, Antonio, Nakagawa, Mitsuhiro (2019) Hydrothermal Aluminum-Phosphate-Sulfates in Ash from the 2014 Hydrothermal Eruption at Ontake Volcano, Central Honshu, Japan. Minerals, 9 (8). 462pp. doi:10.3390/min9080462 | Journal (article/letter/editorial) | | For example, both at the Rodalquilar gold-alunite epithermal deposit in Spain [16] woodhouseite-APS are...For example, both at the Rodalquilar gold-alunite epithermal deposit in Spain [16] euhedral-bladed hydrothermal...kaolinite-pyrophyllite (Rodalquilar gold-alunite gold-alunite ore deposit, deposit, Spain) Spain) [16]. (b) (b)...volcanic-hosted epithermal deposits: Acid-sulphate and adularia-sulfate types. Econ. Geol. 1987, 82, 11–26. [CrossRef]...and isotope geochemistry of the Rodalquilar gold alunite deposit, Spain. Econ. Geol. 1995, 90, 795–822 |  | | Journal (article/letter/editorial) | | affinity to ‘low-sulfidation’ ŽHedenquist, 1987. or ‘adularia– sericite’ ŽHeald et al., 1987. types. Pliocene–Quaternary...district, Japan ŽHedenquist et al., 1994., Rodalquilar, Spain ŽArribas et al., 1995. and Furtei, Italy...and isotope geochemistry of the Rodalquilar Au alunite deposit. Spain Econ. Geol. 90, 795–822. Barton...volcanic-hosted epithermal deposits: acid–sulfate and adularia–sericite types. Econ. Geol. 82, 1–26. 167 Hedenquist |  | | Journal (article/letter/editorial) | | grained and often colloidal-handed varieties, adularia, hydrous micas and clay minerals are typical,...deposits outside the USSR (Goldfield, USA; Rodalquilar, Spain) alunite plays an important role. The formation...quartz, and more rarely with hydrous micas and adularia, as can be established by observation under the...homogeneous material such as quartz or quartz-adularia aggregates. Thus, for example, in the Khakandzha...medium of hydrous mica (5), chlorite or peliti zed adularia. - Under near-surface conditions, which are characterized |  | Marchev, Peter, Downes, Hillary, Thirlwall, Matthew F., Moritz, Robert (2002) Small-scale variations of 87Sr/86Sr isotope composition of barite in the Madjarovo low-sulphidation epithermal system, SE Bulgaria: implications for sources of Sr, fluid fluxes and pathways of the ore-forming fluids. Mineralium Deposita, 37 (6) 669-677 doi:10.1007/s00126-002-0278-3 | Journal (article/letter/editorial) | | alteration and abundant veins with low-sulphidation (adularia– sericite) epithermal mineralisation, which define...which the mineralised part and related quartz–adularia alteration tend to be peripheral to the acid-sulphate...but the presence of hydrothermal breccias and adularia, and estimated temperature–depth boiling point...(K-feldspar and biotite) and in alteration zones adularia (Marchev and Singer 2000). Age determinations...of the volcanic sequence (see below). Ages of adularia from two different veins (32.15±0.16 and 32.12±0 |  | Kouhestani, Hossein, Ghaderi, Majid, Zaw, Khin, Meffre, Sebastien, Emami, Mohammad Hashem (2012) Geological setting and timing of the Chah Zard breccia-hosted epithermal gold–silver deposit in the Tethyan belt of Iran. Mineralium Deposita, 47 (4) 425-440 doi:10.1007/s00126-011-0382-3 | Journal (article/letter/editorial) | | minerals progressed from illite-quartz to quartz-adularia, carbonate, and finally gypsum-dominated assemblages...ore-grade zones are closely related to sericite and adularia alteration. Positive correlations of Au and Ag...abundant hydrothermal cement. Hydrothermal quartz and adularia are the main minerals of the vuggy matrix, followed...drilling core samples; in HB, vugs filled by quartz-adularia cement followed by supergene jarosite. e Polymictic...minerals progressed from illite-quartz to quartz-adularia, carbonate, and finally gypsum-dominated assemblages |  | | Journal (article/letter/editorial) | | as Cochiti, New Mexico (Bundy, 1958), and Rodalquilar,Spain (Lodder, 1966). Volcanicsof intermediatecompositionoccurin...vermiculite and chlorite-bearing subzones. At Rodalquilar, pyrophyllite occurs adjacent to the alunite-quartzzone...also significantthat the rate of crystallization adularia and sericite in the typical "epithermal" of silicateminerals...Survey Bull. 511, 64 p. alteration near Rodalquilar, S. E. Spain, 1966: Geologisch Callaghan,Eugene,1938 |  | | Report (issue) | | 1989) , Lake City, Colorado (Slack, 1980), Rodalquilar, Spain (Arribas and others, 1988; Sanger-von Oepen...Summitville had a more neutral pH closer to that of adularia-sericite ore fluids (Heald and others, 1987)....Rye, R.O., and Castroviejo, R., 1988, Rodalquilar deposits, Spain, first example of caldera-related epithermal...mineralization associated with the Rodalquilar epithermal gold-deposit in southeast Spain: Mineral. Deposita, v. |  | Rainbow, Amelia, Clark, Alan H., Kyser, T. Kurtis, Gaboury, François, Hodgson, C. Jay (2005) The Pierina epithermal Au–Ag deposit, Ancash, Peru: paragenetic relationships, alunite textures, and stable-isotope geochemistry. Chemical Geology, 215 (1) 235-252 doi:10.1016/j.chemgeo.2004.06.050 | Journal (article/letter/editorial) | | Summitville, CO (Stoffregen and Alpers, 1987), and Rodalquilar, Spain (Arribas et al., 1995). At Pierina, these...Summitville, CO (Rye et al., 1990, 1992) and Rodalquilar, Spain (Rye et al., 1992; Arribas et al., 1995)...and isotope geochemistry of the Rodalquilar gold alunite deposit, Spain. Econ. Geol. 90, 795 – 822. Clayton...volcanic-hosted epithermal deposits: acid–sulfate and adularia– sericite types. Econ. Geol. 82, 1 – 26. Hedenquist |  | Ruggieri, Giovanni, Lattanzi, Pierfranco, Luxoro, Silvana S., Dessi, Roberto, Benvenuti, Marco, Tanelli, Giuseppe (1997) Geology, mineralogy, and fluid inclusion data of the Furtei high-sulfidation gold deposit, Sardinia, Italy. Economic Geology, 92 (1) 1-19 doi:10.2113/gsecongeo.92.1.1 | Journal (article/letter/editorial) | | migmatitie and plutonie complexes duringthe Hereynian adularia-serieite-type (Healdet al., 1987)deposits. By...rocksaffected byadvanced (Stoffregen, 1987);Rodalquilar, Spain(Sanger-von Oepenet et al., argillicalteration...barsunderhydrostatic conditions (Haas, positssuchasRodalquilar, Spain(Sanger-yon Oepenet al., pressure are in reasonable...fluid inclusions, and isotope geochemist• of the Rodalquilar rare.Nativegoldisassociated withFe oxides andhydroxides...volcanic-hosted epithermaldeposits: Aeid-sulfate and adularia-serieite Furteiepithermal goldmineralization, |  | | Journal (article/letter/editorial) | | assemblage hosted in quartz ± sericite ± carbonate ± adularia veins (St Barbara, St Demetrios-Viper/Sapes, Pagoni...coexistence of enargite-rich ore and carbonate and/or adularia gangue in the second assemblage is in contrast...high-sulfidation epithermal deposits at, for example, Rodalquilar (Arribas et al. 1995), Lepanto (Hedenquist et...stable isotope geochemistry of the Rodalquilar gold alunite deposit, Spain. Econ Geol 90:795–822 Bajnoczi...sulfosalts from the Barquilla deposit, Salamanca, Spain. Can Miner 35:39–52 Pattrick RAD (1978) Microprobe |
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