 | Kyne, R., Hollings, P., Jansen, N. H., Cooke, D. R. (2013) Supergene and Hypogene Halloysite in a Porphyry-Epithermal Environment at Cerro la Mina, Chiapas, Mexico. Economic Geology, 108 (5) 1147-1161 doi:10.2113/econgeo.108.5.1147 | Journal (article/letter/editorial) | | Porphyry-Epithermal Environment at Cerro la Mina, Chiapas, Mexico ROISIN KYNE,1,†,* PETE HOLLINGS,1 NICHOLAS...Australia Abstract Halloysite, a phyllosilicate clay mineral chemically similar to but structurally different...occurrence of halloysite in the Cerro la Mina Au (Cu-Mo) prospect, Chiapas, Mexico, was investigated to determine...pipe. Gold-copper-molybdenum mineralization at Cerro la Mina is structurally and lithologically controlled...techniques were employed to identify the different clay minerals found within these samples, including halloysite |  | Jansen, Nicholas H., Gemmell, J. Bruce, Chang, Zhaoshan, Cooke, David R., Jourdan, Fred, Creaser, Robert A., Hollings, Pete (2017) Geology and Genesis of the Cerro la Mina Porphyry-High Sulfidation Au (Cu-Mo) Prospect, Mexico. Economic Geology, 112 (4) 799-827 doi:10.2113/econgeo.112.4.799 | Journal (article/letter/editorial) | | and Genesis of the Cerro la Mina Porphyry-High Sulfidation Au (Cu-Mo) Prospect, Mexico Nicholas H. Jansen...Abstract The Cerro la Mina Au (Cu-Mo) porphyry-high sulfidation prospect is located in Chiapas State, southeastern...southeastern Mexico, outside of the major metallogenic provinces of Mexico. The prospect is hosted by Pleistocene...in a complex triple-junction tectonic setting. Cerro la Mina’s stratigraphy comprises pyroclastic flows...trachyandesite domes. The volcanic stratigraphy of Cerro la Mina is dominated by pyroclastic flows and rare basalts |  | Kovács, Ivett, Németh, Tibor, Kiss, Gabriella B., Kis, Viktória K., Tóth, Ágoston, Benkó, Zsolt (2019) Rare aluminium phosphates and sulphates (APS) and clay mineral assemblages in silicified hydraulic breccia hosted by a Permian granite (Velence Mts., Hungary) as indicators of a high sulfidation type epithermal system. Mineralogy and Petrology, 113 (2) 217-228 doi:10.1007/s00710-018-0644-1 | Journal (article/letter/editorial) | | Rare aluminium phosphates and sulphates (APS) and clay mineral assemblages in silicified hydraulic breccia...of the alunite supergroup (APS minerals) associated with clay minerals were found in a polymictic Permian...temperatures ≤150 °C in hydrothermal systems. APS minerals belonging to the woodhouseite solid solution series...formation of APS minerals in association with clay mineral assemblages. Keywords Clay minerals . Aluminium-phosphate-sulfate...Aluminium-phosphate-sulfate minerals . Plumbogummite . HS epithermal system . Velence Mts Editorial handling: |  | | Report (issue) | | Los Alamos National Laboratory Los Alamos, New Mexico 87545 Open-file Report 87-602 This report is...Sr. Jorge Manuel Dengo, Primer Vice-Presidente de la Republica 9:30 Receso Recess 10:00 Panorama del Proyecto...Survey Study Dr. Alien Clark, Centre Este-Oeste de la Universidad de Hawaii 12:20 pm Almuerzo Lunch L...los Estados Unidos, la Direcci6n General de Geologfa, Minas y Hidrocarburos, y la Universidad de Costa...Ilev6 a cabo con la cooperaci6n del Laboratorio Nacional de Los Alamos y el apoyo de la Agencia para el |  | | Journal (article/letter/editorial) | | potassium-bearing minerals is surrounded by multiple zones that contain clay and other hydroxyl-bearing minerals with...oxide zone with extensive iron oxide/hydroxide minerals (yellowish to reddish color altered rocks), which...Stern, 2000; Sabins, 1999). Iron oxide/hydroxide minerals such as limonite, jarosite, and hematite tend...of the minerals (Hunt, 1977; Hunt and Ashley, 1979). Hydroxyl-bearing minerals, including clay and sulfate...sulfate groups, as well as carbonate minerals present diagnostic spectral absorption features due to vibrational |  | | Journal (article/letter/editorial) | | com/locate/oregeorev Spectral characteristics of minerals in alteration zones associated with porphyry copper...argillic and advanced argillic. The iron oxide minerals in the oxidized zone were also identified using...for evaluating aerial distribution of alteration minerals while coupled with remote sensing data analysis...Conventionally, characterization of alteration minerals is done by laboratory-based analytical techniques...easily and rapidly identify many of the alteration minerals that are keys for identification of porphyry copper |  | Cooke, David R., Wilkinson, Jamie J., Baker, Mike, Agnew, Paul, Phillips, Josh, Chang, Zhaoshan, Chen, Huayong, Wilkinson, Clara C., Inglis, Shaun, Hollings, Pete, Zhang, Lejun, Gemmell, J. Bruce, White, Noel C., Danyushevsky, Leonid, Martin, Hamish (2020) Using Mineral Chemistry to Aid Exploration: A Case Study from the Resolution Porphyry Cu-Mo Deposit, Arizona. Economic Geology, 115 (4). 813-840 doi:10.5382/econgeo.4735 | Journal (article/letter/editorial) | | ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) data of epidote provided indications of deposit...application of chlorite proximitor calculations based on LA-ICP-MS analyses provided a precisely defined drill...et al., 2020). Research into porphyry indicator minerals aims to identify the presence of, or potential...mineralization based on the chemistry of igneous minerals such as zircon (Ballard et al., 2002; Dilles et...2016; Cao et al., 20XX) or resistate hydrothermal minerals such as magnetite (Cross, 2000; Dupuis and Beaudoin |  | Carrino, T. A., Crosta, A. P., Toledo, C. L. B., Silva, A. M., Silva, J. L. (2015) Geology and Hydrothermal Alteration of the Chapi Chiara Prospect and Nearby Targets, Southern Peru, Using ASTER Data and Reflectance Spectroscopy. Economic Geology, 110 (1) 73-90 doi:10.2113/econgeo.110.1.73 | Journal (article/letter/editorial) | | the Chapi Chiara prospect, Canahuire deposit, and Cerro Millo and San Antonio de Esquilache targets were...illite-muscovite and/ or smectite, iron-bearing minerals) and (2) spectral indices and selective principal...in paleostratovolcanoes, where the Chapi Chiara, Cerro Millo, and San Antonio de Esquilache targets are...region, including Yanacocha (~12 Ma), Lagunas Norte, La Virgen, Quiruvilca, Sipán, and Pierina (~14.5 Ma)...deposit and the Caspiche porphyry Cu-Au (Chile), La Colosa porphyry gold (Colombia), Lagunas Norte high |  | | Journal (article/letter/editorial) | | amounts, whereas APS (aluminum-phosphate-sulfate) minerals are absent. Therefore a categorization as an epithermal...commercially used F mineral which in its pure minerals contains 48.9 wt.% F, is ranked by the European...and mineral occurrences under study La Alegria, Doña Feliza, Mina Delta, Puerto San Antonio, Don Antonio...investigation on precious and base metals. Industrial minerals such as barite or fluorite in epithermal systems...study are: – How do fluorite and its associated minerals evolve in an epithermal system? – What is the |  | | Journal (article/letter/editorial) | | Paper Mineralogical and Chemical Characteristics of Clay Areas, Gümüşhane Region (NE Turkey), and Their...Received 6 October 2020; accepted 20 June 2021 The clay areas in Gümüşhane (NE Turkey) were examined...analysis were completed on samples from 11 selected clay areas in the region. Within the scope of remote...processed with the Crósta technique to assess the clay areas. The Kale and Tamzı clays are contained within...rocks of the Eocene Alibaba Formation. The other clay areas are in the Liassic Şenköy Formation consisting |  | | Journal (article/letter/editorial) | | sericite, epidote, carbonate, silica, and clay minerals are common. However, phyllic, argillic, and... 2012, 2013). As most hydrothermal alteration minerals have absorption features in the SWIR region of...positioned to define absorption features of common minerals that are typically formed by hydrothermal alteration...vibrations in epidote, chlorite, and carbonate minerals. These absorption features are situated in the...responses related to specific hydrothermal alteration minerals (Crosta et al. 2003). In the SPCA, only certain |  | | Journal (article/letter/editorial) | | hydrothermal alteration and iron oxide/hydroxide minerals. The individual principal component images compiled...reveal the distribution of individual alteration minerals such as sericite, kaolinite, chlorite, epidote...accuracy in the spectral identification of rocks and minerals by using their absorption, reflection and emissivity...and hydroxyl bearing sulfate, silicate and other minerals that contain significant SWIR absorption features...features. Although important rock–forming minerals, including quartz and feldspar, do not exhibit absorption |  | | Journal (article/letter/editorial) | | mineralisation. By interpretation of indicator minerals from hyperspectral drill hole logging data the...kaolinite, 3) the abundance and composition of primary minerals, such as white mica, and 4) the abundance of quartz...explorers about the abundance and composition of minerals. The multispectral ASTER data can help to characterise...a distinct mineralogy. In regolith systems, clay minerals and iron oxides develop in certain levels of...Smectites are weathering products of “primary” minerals, with high Fe/Al smectites forming from mafic rocks |  | Takodjou Wambo, Jonas Didero, Pour, Amin Beiranvand, Ganno, Sylvestre, Asimow, Paul D., Zoheir, Basem, Salles, Rodrigo dos Reis, Nzenti, Jean Paul, Pradhan, Biswajeet, Muslim, Aidy M. (2020) Identifying high potential zones of gold mineralization in a sub-tropical region using Landsat-8 and ASTER remote sensing data: A case study of the Ngoura-Colomines goldfield, eastern Cameroon. Ore Geology Reviews, 122. 103530pp. doi:10.1016/j.oregeorev.2020.103530 | Journal (article/letter/editorial) | | vegetation, iron oxide/hydroxide minerals, Al–OH, FeMg–OH, carbonate group minerals, and silicification using...alteration zones of iron oxide/hydroxide, clay, carbonate minerals and silicification zones were identified...is well-documented that hydrothermal alteration minerals associated with orogenic Au and porphyry Cu-Au...bands that may be sensitive to the alteration minerals in heavy vegetation cover. Although ASTER has...alteration minerals (iron oxides, hydroxyl-bearing minerals, and carbonate-bearing minerals) at the regional |  | Lampinen, Heta M., Laukamp, Carsten, Occhipinti, Sandra A., Metelka, Václav, Spinks, Samuel C. (2017) Delineating Alteration Footprints from Field and ASTER SWIR Spectra, Geochemistry, and Gamma-Ray Spectrometry above Regolith-Covered Base Metal Deposits—An Example from Abra, Western Australia☼. Economic Geology, 112 (8) 1977-2003 doi:10.5382/econgeo.2017.4537 | Journal (article/letter/editorial) | | micas and chlorites are also common as detrital minerals in sedimentary rocks, particularly in mudstones...Laakso et al., 2016;). In addition, kaolin group minerals, which are readily identifiable from the SWIR...Al-OH-bearing sheet silicates; white micas, kaolin group minerals, and smectites in identification of areas of interest...chlorites. Weathering of feldspars to kaolinite group minerals occurs initially through loss of sodium and calcium...smectites in lower saprolite and to kaolin group minerals in upper saprolite in regolith terranes of the |  | Guha, Arindam, Chatterjee, Snehamoy, Oommen, Thomas, Kumar, K. Vinod, Roy, Sandip Kumar (2021) Synergistic use of ASTER, L-band ALOS PALSAR, and hyperspectral AVIRIS-NG data for exploration of lode type gold deposit – A study in Hutti Maski Schist Belt, India. Ore Geology Reviews, 128. 103818pp. doi:10.1016/j.oregeorev.2020.103818 | Journal (article/letter/editorial) | | the formation of calcite, scapolite, and other minerals. Represenattive reflectance spectrum of the altered...biotite, Ca-plagioclase, Ca-amphibole are important minerals for alteration assemblages, which are formed from...altered rocks rich in carbonate minerals and different clay minerals associated with hydrothermal alteration...isoclinal folds and the preferred orientation of flaky minerals of chlorite, biotite and hornblende. The gold...identified on the surface are rich in secondary minerals such as carbonate, epidote, talc, scapolite, etc |  | Swayze, G. A., Clark, R. N., Goetz, A. F. H., Livo, K. E., Breit, G. N., Kruse, F. A., Sutley, S. J., Snee, L. W., Lowers, H. A., Post, J. L., Stoffregen, R. E., Ashley, R. P. (2014) Mapping Advanced Argillic Alteration at Cuprite, Nevada, Using Imaging Spectroscopy. Economic Geology, 109 (5) 1179-1221 doi:10.2113/econgeo.109.5.1179 | Journal (article/letter/editorial) | | at Cuprite, Nevada. Distributions of Fe-bearing minerals, clays, micas, sulfates, and carbonates were mapped...distance between the sensor and the surface. Many minerals formed by alteration during hydrothermal mineralization...methods. It can be used to identify some alteration minerals better than some laboratory methods, including...explains how spectral measurements of alteration minerals (i.e., white mica, alunite, kaolinite, and hydrated...greater number of spectrally detectable alteration minerals. Analytical Methods and Data Collection There |  | | Journal (article/letter/editorial) | | Birchington Street, Beckenham,WA 6107 Abstract The minerals exploration undercover relies on the understanding...which has connotations to deposit genesis. In minerals exploration, the understanding of mineralisation...weathering processes impact on the physico-chemistry of minerals, leading to a destruction of mineral phases and...minor tetrahedrite, chalcopyrite and scheelite ore minerals associated with laminated and/or brecciated hematite...and Black Zones, laminations and bands of ore minerals, iron oxides, barite and quartz commonly exhibit |  | | Report (issue) | | Right in the heart of this desolate area, at Letseng-la-Terai, nestles the world’s highest-lying diamond...Metals Fuel Minerals Nuclear Metals Electronic Metals and Minerals Chemical Metals and Minerals Insulants...y} and uunudedlug rowiioew Vdd Metals and Minerals | ae te ae pe ee Pye At es ar. CS eee ero Se...Luxembourg Madagascar Malawi Malaysia Mali Mauritania Mexico Morocco Mocambique Nepal New Caledonia New Guinea...our civilisation depends. The demand for metals, minerals and energy products is growing relentlessly. Increased |  | | Book | | telle la reproduction pow· fins de distribution generate, de publicite ou de pro1notion, pour la confection...confection de nouveaux travaux collectifs ou pour la revente. Pour toute reproduction de cette nature, on...Delaney. D. Brisban, C. Cutts, D. Ouirt, P Porte/la, and R.A. Olson ... ........... . . . .............mineral resources. Resun1c Plus de 90 % de la vaJeur de la production canadienne de mirn!!raux metalliferes...ajustes pour tenir co1npte de l 'infla1ion,jusqu'a la fin de 2005 les types de gitcs mincraux lcs plus |
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