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20 p, 4.8 MB |
Metamorphic-hosted pyrophyllite and dickite occurrences from the hydrous Al-silicate deposits of the Malatya-Pütürge region, central eastern Anatolia, Turkey
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Bozkaya, Ömer (Cumhuriyet University. Department of Geological Engineering) ;
Yalçin, Hüseyin (Cumhuriyet University. Department of Geological Engineering) ;
Başibüyük, Zeynel (Cumhuriyet University. Department of Geological Engineering) ;
Bozkaya, Gülcan (Cumhuriyet University. Department of Geological Engineering)
Hydrous Al-silicate deposits are found to the south of Pütürge in Malatya city, Turkey. The surrounding rocks consist of mylonitic granitic gneiss overlain by muscovite gneiss with kyanite-bearing metabasic schist lenses on top which are cut by silica veins containing prismatic tourmaline and specularite. [...]
2007 -  10.1346/CCMN.2007.0550409
Clays and Clay Minerals, Vol. 55, Núm. 4 (2007) , p. 423-442
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12 p, 1.3 MB |
Low-temperature hydrothermal alteration of silicic glass at the PACMANUS hydrothermal vent field, manus basin : An XRD, SEM and AEM-TEM study
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Giorgetti, Giovanna (Università di Siena. Dipartimento di Scienze della Terra) ;
Monecke, Thomas (University of Ottawa. Department of Earth Sciences) ;
Kleeberg, Reinhard (TU Bergakademie Freiberg. Institut für Mineralogie) ;
Hannington, Mark D. (University of Ottawa. Department of Earth Sciences.)
Dacitic lava recovered from the immediate subsurface of the submarine PACMANUS hydrothermal vent field exhibits variable degrees of hydrothermal alteration resulting from the interaction of the glassy volcanic rocks with mineralizing hydrothermal fluids at relatively low temperatures. [...]
2006 - 10.1346/CCMN.2006.0540209
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 240-251
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22 p, 1.9 MB |
Spatial and temporal evolution of hydrothermal alteration at Lavras do Sul, Brazil : Evidence from dioctahedral clay minerals
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Bongiolo, Everton Marques (Universidade Federal do Rio Grande do Sul. Instituto de Geociências) ;
Patrier-Mas, Patricia (Université de Poitiers) ;
Mexias, André Samparo (Universidade Federal do Rio Grande do Sul. Instituto de Geociências) ;
Beaufort, Daniel (Université de Poitiers) ;
Laquintinie Formoso, Milton Luiz (Universidade Federal do Rio Grande do Sul. Instituto de Geociências)
The Au-Cu (±Pb, Zn, Ag) prospects of Lavras do Sul, southernmost Brazil, are hosted in Neoproterozoic granitic and volcanogenic rocks. Mineralization occurs in structurally controlled N40°W to E-W quartz veins; sericite (±chlorite) and sulfides are the main secondary minerals in associated wall rocks. [...]
2008 - 10.1346/CCMN.2008.0560207
Clays and Clay Minerals, Vol. 56, Núm. 2 (2008) , p. 222-243
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12 p, 1.1 MB |
Application of chemical geothermometry to low-temperature trioctahedral chlorites
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Inoue, Atsuyuki (Chiba University. Department of Earth Sciences) ;
Meunier, Alain (Université de Poitiers) ;
Patrier-Mas, Patricia (Université de Poitiers) ;
Rigault, Cecile (Université de Poitiers) ;
Beaufort, Daniel (Université de Poitiers) ;
Vieillard, Philippe (Université de Poitiers)
Low-temperature chlorites formed in diagenetic to low-grade metamorphic environments generally have greater Si contents and larger numbers of octahedral vacancies, and smaller Fe+Mg contents than higher-grademetamorphic chlorites. [...]
2009 - 10.1346/CCMN.2009.0570309
Clays and Clay Minerals, Vol. 57, Núm. 3 (2009) , p. 371-382
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19 p, 3.0 MB |
The occurrence and origin of the söǧüt kaolinite deposits in the paleozoic saricakaya granite-granodiorite complexes and overlying neogene sediments (Bilecik, Northwestern Turkey)
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Kadir, Selahattín (Eskişehir Osmangazi University. Department of Geological Engineering) ;
Kart, Fírdevs (Eskişehir Osmangazi University. Department of Geological Engineering)
The Soǧut kaolinite deposits at Çalti{dotless}, İnhisar, and Küre, Turkey, are an important source of raw materials for the ceramics industry of that country, but no detailed mineralogical or geochemical characterizations of these economically important materials have been carried out to date. [...]
2009 - 10.1346/CCMN.2009.0570304
Clays and Clay Minerals, Vol. 57, Núm. 3 (2009) , p. 311-329
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27 p, 5.3 MB |
Mineralogical and geochemical characteristics and genesis of hydrothermal kaolinite deposits within neogene volcanites, Kütahya (western Anatolia), Turkey
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Kadir, Selahattín (Eskişehir Osmangazi University. Department of Geological Engineering) ;
Erman, Hande (Eskişehir Osmangazi University. Department of Geological Engineering) ;
Erkoyun, Hülya (Eskişehir Osmangazi University. Department of Geological Engineering)
The Kü tahya kaolinite deposits are the most important source of raw materials for the ceramics industry in Turkey. To date, no detailed mineralogical or geochemical characterizations of these materials have been carried out; the present study aims to fill that gap. [...]
2011 - 10.1346/CCMN.2011.0590304
Clays and Clay Minerals, Vol. 59, Núm. 3 (2011) , p. 250-276
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12 p, 2.5 MB |
Progressive formation of halloysite from the hydrothermal alteration of biotite and the formation mechanisms of anatase in altered volcanic rocks from limnos island, northeast aegean sea, greece
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Papoulis, Dimitrios (University of Patras. Department of Geology) ;
Tsolis-Katagas, Panagiota (University of Patras. Department of Geology) ;
Kalampounias, Angelos G. (Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ICE-HT)) ;
Tsikouras, Basilios (University of Patras. Department of Geology)
Occurrences of halloysite-rich material in altered volcanic rocks, principally trachyandesites, dacites, and tuffs, extend over an area of ~1 km2 in the southwestern part of Limnos, Island, northeast Aegean Sea, Greece. [...]
2009 - 10.1346/CCMN.2009.0570505
Clays and Clay Minerals, Vol. 57, Núm. 5 (2009) , p. 566-577
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17 p, 2.6 MB |
Low-temperature hydrothermal alteration of trachybasalt at Conical Seamount, Papua New Guinea : Formation of smectite and metastable precursor phases
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Giorgetti, Giovanna (Università di Siena. Dipartimento di Scienze della Terra) ;
Monecke, Thomas (Department of Geology and Geological Engineering. Colorado School of Mines) ;
Kleeberg, Reinhard (Institut für Mineralogie. TU Bergakademie Freiberg) ;
Hannington, Mark D. (Department of Earth Sciences. University of Ottawa)
The conversion of volcanic glass to secondary alteration products is one of the most common mineralogical transformations during low-temperature hydrothermal alteration of submarine basalts. To better understand the mechanism and kinetics of this transformation, porphyritic and formerly glassy trachybasalt, recovered from Conical Seamount, Papua New Guinea, was studied in detail. [...]
2009 - 10.1346/CCMN.2009.0570606
Clays and Clay Minerals, Vol. 57, Núm. 6 (2009) , p. 725-741
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