Clays and Clay Minerals

Clays and Clay Minerals 10 records found  Search took 0.02 seconds. 
1.
13 p, 819.4 KB Microbial Reduction of Fe(III) in the Fifthian and Muloorina illites : Contrasting extents and rates of bioreduction / Seabaugh, Jennifer L. (Miami University. Department of Geology) ; Dong, Hailiang (Miami University. Department of Geology) ; Kukkadapu, Ravi K. (Pacific Northwest National Laboratory) ; Eberl, Dennis D. (United States Geological Survey) ; Morton, John P. (Miami University. Department of Geology) ; Kim, Jinwook (Seafloor Sciences Branch. Naval Research Laboratory)
Shewanella putrefaciens CN32 reduces Fe(III) within two illites which have different properties: the Fithian bulk fraction and the <0. 2 μm fraction of Muloorina. The Fithian illite contained 4. [...]
2006 - 10.1346/CCMN.2006.0540109
Clays and Clay Minerals, Vol. 54, Núm. 1 (2006) , p. 67-79  
2.
10 p, 677.0 KB Crystal-size dependence of illite-smectite isotope equilibration with changing fluids / Williams, Lynda B. (Arizona State University. Department of Geological Sciences) ; Hervig, Richard L. (Arizona State University. Department of Geological Sciences)
Differences in equilibration rates among crystals of different sizes may be used to deduce paleofluid changes over time if the crystal-growth mechanism is known. To explore isotopic equilibration rates as a function of illite growth, we studied B-isotope changes during illitization of smectite. [...]
2006 - 10.1346/CCMN.2006.0540501
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 531-540  
3.
14 p, 2.5 MB Clay minerals formed during propylitic alteration of a granite and their influence on primary porosity : A multi-scale approach / Cassiaux, M. (University of Poitiers) ; Proust, D. (University of Poitiers) ; Siitari-Kauppi, M. (University of Helsinki) ; Sardini, P. (University of Poitiers) ; Leutsch, Y. (ANDRA)
The porosity of a propylitized granite from Charroux (France), with no fractures or sealed fractures, inreases by more than four times from the unaltered (0. 3%) to the altered rock (1. 4%). This evolution results from several local porosity modifications which occur at different scales in the rock: (1) at the core scale, from 10 to 10 m, where rock porosity changes as a function of rock-forming mineralogical composition; (2) at the mineral scale, from 10 to 10 m, where porosity depends both on the nature of the rock-forming mineral and its clay mineral alteration. [...]
2006 - 10.1346/CCMN.2006.0540502
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 541-554  
4.
16 p, 2.7 MB Geology, mineralogy and origin of clay minerals of the Pliocene fluvial-lacustrine deposits in the Cappadocian volcanic province, central Anatolia, Turkey / Gürel, Ali (Niǧde University. Department of Geological Engineering) ; Kadir, Selahattiçn (Eskişehir Osmangazi University. Department of Geological Engineering)
The Güzelöz-İncesu Plateaus are situated in the central and eastern parts of the Cappadocian volcanic province (central Anatolia). This province contains many ignimbrite levels, andesite, basalt intercalated with several paleosols, calcrete, carbonate, fluvial sediments, diatomaceous clayey sediments and pyroclastic sedimentary levels. [...]
2006 - 10.1346/CCMN.2006.0540503
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 555-570  
5.
16 p, 897.2 KB The smectite-to-disordered kaolinite transition in a tropical soil chronosequence, Pacific Coast, Costa Rica / Fisher, G. Burch (Dartmouth College. Earth Sciences Department) ; Ryan, Peter C. (Middlebury College. Geology Department)
Soils developed on Quaternary fluvial fill terraces in the humid tropics of Costa Rica display progressive changes in mineral assemblage, chemical composition and particle size with age. Clay minerals from B horizons of active floodplains are predominantly smectite with lesser amounts of disordered kaolinite. [...]
2006 - 10.1346/CCMN.2006.0540504
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 571-586  
6.
11 p, 2.0 MB Zeolites and coexisting authigenic minerals in Miocene tuffs of the Alaçati (Çeşme) area, Turkey / Kaçmaz, H. (Dokuz Eylul University. Department of Geological Engineering) ; Köktürk, U. (Dokuz Eylul University. Department of Mining Engineering)
The zeolites and coexisting minerals of the silicic vitric tuffs in the Alaçati (Çeşme) area, west of İzmir (Turkey), were studied. Mordenite is the most abundant zeolite in tuffs of the Alaçati area and usually coexists with clinoptilolite-heulandite, smectite and calcite. [...]
2006 - 10.1346/CCMN.2006.0540505
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 587-597  
7.
11 p, 1.3 MB Effects of reaction conditions on the formation of todorokite at atmospheric pressure / Cui, Hao-Jie (Huazhong Agricultural University. College of Resources and Environment) ; Feng, Xionghan (Huazhong Agricultural University. College of Resources and Environment) ; He, Ji-Zheng (Chinese Academy of Sciences. Research Center for Eco-Environmental Sciences) ; Tan, Wenfeng (Huazhong Agricultural University. College of Resources and Environment) ; Liu, Fan (Huazhong Agricultural University. College of Resources and Environment)
Todorokite is a common Mn oxide (with a tunnel structure) in the Earth surface environment, and can be obtained by hydrothermal treatment or refluxing process from precursor buserite with a layered structure. [...]
2006 - 10.1346/CCMN.2006.0540507
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 605-615  
8.
10 p, 1.7 MB Fuzzy phase diagrams of clay minerals / Varadachari, Chandrika (Raman Centre for Applied and Interdisciplinary Sciences)
This paper presents a novel concept in the thermodynamic derivation of phase diagrams for clay minerals that incorporates fuzzy transition zones. This new technique yields phase diagrams that have graded (fuzzy) zones of mineral occurrences and includes compositional variability within mineral groups. [...]
2006 - 10.1346/CCMN.2006.0540508
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 616-625  
9.
12 p, 1.4 MB Al-pillared montmorillonite obtained in concentrated media. Effect of the anions (nitrate, sulfate and chloride) associated with the Al species / Aouad, Amina (Université d'Orléans) ; Pineau, Alain (Université d'Orléans) ; Tchoubar, Denise (CRT Plasma-Laser) ; Bergaya, Faïza (Université d'Orléans)
Basic Al chloride, sulfate and nitrate were prepared by hydrolysis of Al chloride followed by precipitation with a Na sulfate solution, then re-dissolution in a Ba nitrate solution. The three laboratory-synthesized oligomers and solid, commercial chlorhydrol were characterized by X-ray diffraction, Al nuclear magnetic resonance and scanning electron microscopy coupled with energy dispersion spectroscopy analysis. [...]
2006 - 10.1346/CCMN.2006.0540509
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 626-637  
10.
12 p, 825.9 KB Raw material sources for the Roman Bracarense ceramics (NW Iberian Peninsula) / Prudêncio, M. Isabel (Instituto Tecnológico e Nuclear) ; Sequeira Braga, M. Amália (Universida de do Minho. Centro de Investigacao Geologica Ordenamento e Valorizacao de Recursos (CIG-R)) ; Oliveira, Felisbela (Câmara Municipal. Gabinete de Arqueologia) ; Dias, Maria Isabel (Instituto Tecnológico e Nuclear) ; Delgado, Manuela (Universidade do Minho. Unidade de Arqueologia) ; Martins, Manuela (Universidade do Minho. Unidade de Arqueologia)
The Bracarense ceramics are characterized by a fine, pale yellow paste covered with a brownish yellow slip. The name is derived from Bracara Augusta, the Roman town located in the north of Portugal, where this type of ceramic paste was first found and identified. [...]
2006 - 10.1346/CCMN.2006.0540510
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 638-649  

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