 | 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 |  | | 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...structures at Rodalquilar ranges from advanced argillic alteration (porous quartz, alunite, pyrophyllite, dickite)...and 250~ However, the hydrothermal system at Rodalquilar was fed by a second fluid source. High-salinity |  | | 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...zone. Advanced argillic alteration with silica, pyrophyllite, alunite, and kaolinite extends down to several...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 |  | 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)...undertheadvanced argillic (stagei alunite,diaspore, zunyite,pyrophyllite) andsilicic(vuggy silicaandmassive silicified |  | Arribas, Antonio, Cunningham, C.G., McKee, E.H., Rye, R.O., Rytuba, J.J., Tosdal, R.M., Wasserman, M.D., Aoki, Masahiro (1995) Compilation of sample preparation and analytical methods and results of chemical, isotopic, and fluid inclusion analyses, Rodalquilar gold-alunite deposit, Spain. Open-File Report Vol. 1995 (95-221) US Geological Survey doi:10.3133/ofr95221 | Report (issue) | | and fluid inclusion analyses, Rodalquilar gold-alunite deposit, Spain by Anibas Jr., Antonio1'5 Cunningham...of the Rodalquilar gold-alunite deposit ..........................9 Index map of the Rodalquilar caldera................ 10 Cross-sections through the Rodalquilar and Lomilla calderas ........... 11 2. 3. 4...composition of volcanic rocks related to the Rodalquilar deposits ....................................... 25 Summary of stable isotope data for the Rodalquilar deposit................ 2& 14. 15. 16. 17. 18 |  | 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 |  | Rytuba, James J., Arribas, Antonio, Cunningham, C.G., McKee, E.H., Smith, James G., Arribas, Antonio (1989) Evolution of the Rodalquilar caldera complex and associated gold-alunite deposits, Cabo de Gata volcanic field, southeastern Spain. Open-File Report Vol. 1989 (89-326) US Geological Survey doi:10.3133/ofr89326 | Report (issue) | | DEPOSITS, CABO DE GATA VOLCANIC FIELD, SOUTHEASTERN SPAIN B/ James J. Rytubal Antonio Arribas Jr.2 Charles...University of Salamanca, Salamanca 37008, Spain EVOLUTION OF THE RODALQUILAR CALDERA COMPLEX AND ASSOCIATED GOLD-ALUNITE...DEPOSITS, CABO DE GATA VOLCANIC FIELD, SOUTHEASTERN SPAIN INTRODUCTION The Miocene Cabo de Gata volcanic...southeastern coast of Spain and is the only extensive area of Tertiary volcanic rocks in Spain. The volcanic...discusses the detailed geologic evolution of the Rodalquilar caldera complex and its spatial and temporal |  | 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) | | assemblage forms, which is composed of silica, pyrophyllite, alunite and kaolinite/dickite, plus APS, among...silica–pyritesilica–pyrite ± alunite ± kaolin, silica–pyrophyllite–pyrite, classifiedthethe alteration into fivesilica–pyrite...± garnet ± ±biotite. These results indicate pyrophyllite–pyrite, silica–muscovite ± chlorite, and silica–K-feldspar...silica mineral, Kl: 7-Å kaolin-group mineral, Po: pyrophyllite, Alu: alunite, Wod: woodhouseite-APS, Py: pyrite...5b). A fine mixture of silica mineral(s) and pyrophyllite fill an internallythe homogenous core of woodhouseite-APS |  | Rytuba, J. J., Arribas, A., Cunningham, C. G., McKee, E. H., Podwysocki, M. H., Smith, J. G., Kelly, W. C., Arribas, A. (1990) Mineralized and unmineralized calderas in Spain; Part II, evolution of the Rodalquilar caldera complex and associated gold-alunite deposits. Mineralium Deposita, 25. doi:10.1007/bf00205247 | Journal (article/letter/editorial) | | and unmineralized calderas in Spain; Part H, evolution of the Rodalquilar caldera complex and associated...1989/Accepted: August 3, 1990 Abstract. The Rodalquilar caldera complex is located in the western part...the Cabo de Gata volcanic field in southeastern Spain and is the first documented example of epithermal...mineralization within a caldera in Europe. The Rodalquilar caldera is an oval collapse structure having...within the central resurgent dome of the older Rodalquilar caldera. The Lomilla caldera resulted from the |  | | Journal (article/letter/editorial) | | FROM THE PALAI-ISLICA Au-Cu DEPOSIT (ALMERÍA, SE SPAIN) J A V IE R C AR R I LL O -R OS Ú A 1 , * , S A...Educación, Campus de Cartuja, 18071, Granada, Spain Departamento de Mineralogı́a y Petrologı́a, Universidad...Ciencias, Avd. Fuentenueva s.n., 18002, Granada, Spain 3 Instituto Andaluz de Ciencias de la Tierra, CSIC...Ciencias, Avd. Fuentenueva s.n., 18002, Granada, Spain 2 Abstract—Phyllosilicate mineralogy is key to...interstratified illite-smectite, kaolinite, and pyrophyllite are characteristic, with a distribution pattern |  | | Journal (article/letter/editorial) | | the assemblage alunite-muscovitekaolinite (or pyrophyllite)-quartzin terms of total molal H2SO4 and K2SO4...geologicobservation,alunite~kaolinite(including dickite or pyrophyllite) are shownto be the mostlikely productsof s...of the minerals kaolinite,dickite,sericiteor pyrophyllite. Suchassemblages are indicativeof extremecationleaching...montmorillonite-chlorite type of alteration. Pyrophyllite,andalusite,zunyite,and diasporeoccurlocallywith...sulfuric acid appears to be produced alunite-pyrophyllite deposits in BritishColumbiadeby surfaceor n |  | | Report (issue) | | events as suggested previously. The presence of pyrophyllite, topaz, zunyite and woodhouseite within alteration...alteration zonation as it identifies minerals such as pyrophyllite, topaz and zunyite effectively. High field strength...a pyritic quartz–sericite±pyrophyllite zone. Within this zone, pyrophyllite, which was identified using...ore-related quartz–chlorite± sericite zone. The pyrophyllite-bearing zone also contains topaz and zunyite... identified using PIMA. The quartz–sericite±pyrophyllite zone passes outward to a quartz–chlorite–sericite–carbonate |  | Dill, H. G., Bosse, H.-R., Henning, K.-H., Fricke, A., Ahrendt, H. (1997) Mineralogical and chemical variations in hypogene and supergene kaolin deposits in a mobile fold belt the Central Andes of northwestern Peru. Mineralium Deposita, 32 (2) 149-163 doi:10.1007/s001260050081 | Journal (article/letter/editorial) | | minerals are present: white mica, smectite, barite, pyrophyllite, tridymite, cristobalite, a- and bquartz, chamosite...dickite Kaolinite Kaolinite, quartz Goethite Pyrophyllite, zunyite, topaz Feldspar, smectite Formacion...argillic alteration in the study area where pyrophyllite is present; traces of topaz and zunyite are...Above this temperature it is converted into pyrophyllite 51.51 53.38 55.49 Min. Mean Max. Min. Mean...kaolinite would mation for the alunite-dickite-pyrophyllite paragenesis is imply pore solutions with a pH |  | | Report (issue) | | pyriterich such as at El Salvador, Chile; Rodalquilar, Spain and Goldfield, Nevada. Supergene alunite...Arribas, Jr., currently studying the Rodalquilar district in Spain as part his Ph. D. program, and Jeff...accompaniment, particularly in silica-rich zones. Pyrophyllite and, occasionally, diaspore may also occur in...alunites from Rodalquilar are the stage 2 alunites shown in Figure 17a-b. The alunites at Riaza, Spain are from...Creede and Riaza and supergene kaolinites from Rodalquilar fall close to, but to the left of, the kaolinite |  | Sahlström, Fredrik, Dirks, Paul, Chang, Zhaoshan, Arribas, Antonio, Corral, Isaac, Obiri-Yeboah, Matthew, Hall, Chris (2018) The Paleozoic Mount Carlton Deposit, Bowen Basin, Northeast Australia: Shallow High-Sulfidation Epithermal Au-Ag-Cu Mineralization Formed During Rifting. Economic Geology, 113 (8) 1733-1767 doi:10.5382/econgeo.2018.4611 | Journal (article/letter/editorial) | | minerals (e.g., alunite, dickite, kaolinite, pyrophyllite, diaspore, and pyrite) that may have areal extents...unoxidized high-sulfidation deposits such as Lepanto, Rodalquilar, Chelopech, Chinkuashih, Pierina, and Pueblo...= Pueblo Viejo, Dominican Republic; Ro = Rodalquilar, Spain; Su = Summitville, Nevada; Ta = Tambo, Chile;...kln = kaolinite, mnt = montmorillonite, prl = pyrophyllite, py = pyrite, qtz = quartz, rt = rutile. Downloaded...porphyry 50 m Fig. 7. (Cont.) minerals, and pyrophyllite (Fig. 9). Pyrite occurs as disseminations in |  | Corral, Isaac, Cardellach, Esteve, Corbella, Mercè, Canals, Àngels, Gómez-Gras, David, Griera, Albert, Cosca, Michael A. (2016) Cerro Quema (Azuero Peninsula, Panama): Geology, Alteration, Mineralization, and Geochronology of a Volcanic Dome-Hosted High-Sulfidation Au-Cu Deposit. Economic Geology, 111 (2) 287-310 doi:10.2113/econgeo.111.2.287 | Journal (article/letter/editorial) | | Universitat Autònoma de Barcelona, 08193 Barcelona, Spain Geology Research Centre (EGRU), College of Science...Geologia, Universitat de Barcelona, 08028 Barcelona, Spain 4 U.S. Geological Survey, Denver, CO 80225 Abstract...outward) characterized by quartz ± alunite ± pyrophyllite ± dickite ± kaolinite ± illite, and montmorillonite...Parita Ocú South America Plate Nazca Plate pyrophyllite. All of these are diagnostic of a high sulfidation...Advanced argillic; quartz, kaolinite-dickite, pyrophyllite, barite, illite and pyrite Advanced argillic; |  | | Journal (article/letter/editorial) | | small-sample averages from Nansatsu (Japan), Rodalquilar (Spain), Paradise Peak (Nevada) and El Indio (Chile;...alteration. The volume of rock altered to alunite, pyrophyllite, and kaolinite and showing intense silicification...the ore body grade outward and upward through pyrophyllite-bearing assemblages to kaolinite and intense...overprinted by deep, pervasive and vein-hosted pyrophyllite±diaspore that graded upward into massive silicification...The upward transition from deep alunite and/or pyrophyllite to shallow kaolinite and intense silicification |  | Juliani, Caetano, Rye, Robert O., Nunes, Carmen M.D., Snee, Lawrence W., Corrêa Silva, Rafael H., Monteiro, Lena V.S., Bettencourt, Jorge S., Neumann, Rainer, Neto, Arnaldo Alcover (2005) Paleoproterozoic high-sulfidation mineralization in the Tapajós gold province, Amazonian Craton, Brazil: geology, mineralogy, alunite argon age, and stable-isotope constraints. Chemical Geology, 215 (1) 95-125 doi:10.1016/j.chemgeo.2004.06.035 | Journal (article/letter/editorial) | | hydrothermal breccias contain alunite, natroalunite, pyrophyllite, andalusite, quartz, rutile, diaspore, wood...irregular veins of milky quartz with subordinate pyrophyllite cut the silica cap. Fig. 7. Schematic reconstruction...progressively away from the hydrothermal breccias, as pyrophyllite increases, until alunite disappears approximately...kaolinite- and pyrophyllite-rich veins, some of which contain andalusite replaced by pyrophyllite or dsericiteT...a pervasive or fissure-filling assemblage of pyrophyllite+ quartzFpyriteFandalusiteFdiasporeFrutile. |  | Kesler, Stephen E., Russell, N., Seaward, M., Rivera, J., McCurdy, K., Cumming, George L., Sutter, J. F. (1981) Geology and geochemistry of sulfide mineralization underlying the Pueblo Viejo gold-silver oxide deposit, Dominican Republic. Economic Geology, 76 (5) 1096-1117 doi:10.2113/gsecongeo.76.5.1096 | Journal (article/letter/editorial) | | was developed by weathering of a goldquartz-pyrophyllite deposit that formed during sedimentation in...sphalerite, and quartz; minor barite, enargite,and pyrophyllite;and tracesof electrum,argentitc, colusite, ...Viejo system is similar to other gold-quartz-pyrophyllite deposits except that it contains no known mineable...Member, on Loma la Cuaba (Fig. 1), consists of pyrophyllite-bearing rock with extensive stratiform zones...(Fig. 1). Just west of the Los Ranchos well as pyrophyllite and pumpellyite locally, Formation outcrop is |  | | Journal (article/letter/editorial) | | length of 1.4 km and includes thin, strata-bound pyrophyllite-quartz-paragonite-kaolinite-pyrite-alunite alteration...12 m wide and containing up to 50 wt percent pyrophyllite, with local fluorite veining. These zones grade...mainly within an intensely silicified core of the pyrophyllite-quartzsericite alteration zone. Pyrite has δ34S...Carbonate-chlorite-sericite Sericite-carbonate Sericite-quartz Pyrophyllite-quartz-sericite Unaltered Ordovician sedimentary...associated with intensely silicified rock and pyrophyllite-quartz-sericite alteration zones (drill hole |  | Franchini, Marta, Impiccini, Agnes, Lentz, David, Ríos, Francisco Javier, O'Leary, Sol, Pons, Josefina, Schalamuk, Abel Isidoro (2011) Porphyry to epithermal transition in the Agua Rica polymetallic deposit, Catamarca, Argentina: An integrated petrologic analysis of ore and alteration parageneses. Ore Geology Reviews, 41 (1) 49-74 doi:10.1016/j.oregeorev.2011.06.010 | Journal (article/letter/editorial) | | condensed magmatic vapor. At higher levels, pyrophyllite replaces muscovite and illite in clasts of hydrothermal...sulfur; Sp = sphalerite; Py = pyrite; Prl = pyrophyllite; and Zun = zunyite. that also has an intergrown...+ pyrite veinlet at a or fracture at c). e): Pyrophyllite veinlet A cut a boulder of altered porphyry...1999). It is characterized by the presence of pyrophyllite, alunite, diaspore, zunyite, and native sulfur...hydrothermal breccias (AR-82; Figs. 3 and 4), pyrophyllite occurs in clots and veinlets within fragments |  | Chouinard, A., Williams-Jones, A. E., Leonardson, R. W., Hodgson, C. J., Silva, P., Tellez, C., Vega, J., Rojas, F. (2005) Geology and Genesis of the Multistage High-Sulfidation Epithermal Pascua Au-Ag-Cu Deposit, Chile and Argentina. Economic Geology, 100 (3) 463-490 doi:10.2113/gsecongeo.100.3.463 | Journal (article/letter/editorial) | | by quartz, alunite, pyrite, and rutile; minor pyrophyllite, kaolinite, and/or dickite occur locally. The...compositional zoning (Deyell et al, 2005). Early pyrophyllite coprecipitated with alunite contains corroded...alunite, suggesting that some of the alunite-pyrophyllite assemblage may have formed in a deep zone of...Advanced argillic alteration (quartz-alunite-pyrophyllite) Oxidized advanced argillic alteration (including...argillic (quartz-alunite +/kaolinite, dickite, pyrophyllite) Argillic (illite-smectite) Propylitic (chlorite |  | | Journal (article/letter/editorial) | | adjacent host rocks to quartz+kaolinite/dickite±pyrophyllite±alunite (Summitville, Colorado; see Stoffregen...(1995a, Fig. 16) Wang et al. (1999, Fig. 2f) Rodalquilar Buffalo deposit, Chinkuashih, Taiwan Hedenquist...Henley (1989); See also Arribas et al. (1995a): Rodalquilar Taylor (1974) Ransome (1907) Henley and McNabb...other Sn–W and Cu–(Mo–Au) deposits Experiments Rodalquilar Geologic environment reminiscent of the top of...argillic alteration (quartz+kaolinite/dickite/ pyrophyllite+alunite). There is general agreement that this |  | | Journal (article/letter/editorial) | | of the intrusive, including quartz, sericite, pyrophyllite, diaspore, aluminum-phosphates-sulfates (APS)...quartz, natroalunite, and minor diaspore and pyrophyllite. The APS minerals are Ca-Sr-Ba-Pb-rich phosphates-sulfates...alteration, dominated by quartz-dickite r pyrophyllite r diaspore, to sericitic (quartz-sericitepyrite)...alteration is transitional upward to quartz-pyrophyllite (SILLITOE 2010). Transitional sericitic-advanced...refer to the presence of sericite, andalusite, pyrophyllite, kaolinite-dickite, corundum, diaspore, alunite |  | | Report (issue) | | ___________________———— France ________________________ Spain ________________________ Italy _________________________...titanium oxides, and occasionally containing minor pyrophyllite, diaspore, and zunyite; (4) outer argillic zone...Greece, Iran, Japan, Pakistan, Republic of Korea, Spain, and Turkey. INTRODUCTION HISTORICAL BACKGROUND...anatase, and hematite, and less commonly with pyrophyllite, diaspore, zunyite, and other alteration minerals...NONBAUXITE ALUMINUM RESOURCES—ALUNITE monly, pyrophyllite, diaspore, and zunyite also may be present. |
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