Silvana Bertolino | Universidad Nacional de Córdoba (original) (raw)

Papers by Silvana Bertolino

Applied Clay Science, 2003

Pottery sherds from the archaeological sites El Altillo (100 F 70 AC, radiocarbon age) and Piedra... more Pottery sherds from the archaeological sites El Altillo (100 F 70 AC, radiocarbon age) and Piedras Blancas (ca. 600-1000 AC), in the Ambato valley, and two local clay resources were characterized for their mineralogy, chemistry and thermal behavior. Raw materials used were the local red clays with additions of mostly grit from the local off-white clays. Firing ranges of around 600, 700, 700-800 and 900-1000 jC were inferred from the mineralogy and SEM textures; TGA analyses did not help in inferring firing temperatures. No significant changes were observed in the ceramic technology; it does not reflect the socio-political changes that occurred in the IVth century, which are expressed in the iconography. This suggests the continuity of the ceramic tradition, which was based on a good usage of natural resources and a knowledge of their properties over a period of 1000 years.

Journal of Dispersion Science and Technology

2001. A Clay Odyssey, 2003

LPI Contributions, 1991

28th ANNUAL CMS AN EXCEPTIONAL ILUTE FROM THE EUREKA MINE, CORDOBA PROVINCE, REP. ARGENTINA Silva... more 28th ANNUAL CMS AN EXCEPTIONAL ILUTE FROM THE EUREKA MINE, CORDOBA PROVINCE, REP. ARGENTINA Silvana R. Bertolino Cohn C. Harvey Haydn H. Murray 1 CONICET. Fac. Cs. Ex. FIs. y Nat. Universidad Nacional de Córdoba. Av Velez Sarsfield 299. ...

London 2013, 75th eage conference en exhibition incorporating SPE Europec, 2013

ABSTRACT Injection of MgCl2 into a Campanian chalk sample from Liège (Belgium) for enhanced oil r... more ABSTRACT Injection of MgCl2 into a Campanian chalk sample from Liège (Belgium) for enhanced oil recovery over 516d revealed mineralogical changes. A new mineral phase grew massively in the first centimeters of the tested core characterised by an increase of MgO about 90x the original composition and a depletion of CaO by more than 1/3 based on whole-rock geochemistry. Two new phases could be revealed so far in the tested core: magnesite and dolomite. MLA studies demonstrated that different Mg-enriched carbonate minerals could be observed in the different flooded slices of the chalk. This is of importance as O-isotope values are disturbed by the injected fluid and even reflect the injection temperature of 130°C when using δ18O values for temperature calculations. In this test, fluid injection and flow could not be monitored by REE. XRD analyses could only reveal the existence of magnesite. In contrast, O-isotope values show a strong variation and are most probably fixed in the newly formed mineral magnesite and dolomite. With these results it is possible to develop a fine tool to trace fluid flow, which changes the mineralogical composition of chalk. These results are of importance for peer groups involved in EOR processes.

X-Ray Spectrometry, 2009

Andrés Laguens, c,e Guillermo de la Fuente d,e and José A. Riveros a,e X-ray diffraction (XRD), e... more Andrés Laguens, c,e Guillermo de la Fuente d,e and José A. Riveros a,e X-ray diffraction (XRD), energy dispersive spectrometry (EDS), x-ray imaging (XRI) and scanning electron microscopy (SEM) techniques were applied to characterize and differentiate surface paintings of archeological pottery from the Aguada Ambato and Portezuelo styles (Catamarca, Argentina). Standard procedures are not always appropriate for such samples (paint layers are porous, nonplanar and discontinue). Image processing is necessary when chemical contrast is not discriminated. Soft x-ray lines (e.g. Fe L) are more revealing because those detected come from shallower depths, clearly depicting the composition of the paint layer. These styles differ in mineralogy and chemistry suggesting that they are two distinctive entities not only on their designs but also on the materials chosen and the technology used. Aguada Portezuelo paints contain Ca (white), Fe-Mn (black), Fe-Mn-Ca (dark reddish) and Fe-Ca (reddish). The white ones correspond to gehlenite, a firing product (possible firing temperature ≥900-1000 • C); calcite and CaO occur in cases of firing temperatures <900 • C. Aguada Ambato presents difficulties for paint discrimination; only EDS spectra show slight differences. White paint from Tricolor Ambato contains mainly Pb-phases (hatchite, anglesite, plumalsite), reddish paint resembles the paste (∼Fe, hematite); reddish surfaces may have not been painted but polished. Black paint has scarce Mn-minerals. On Black Incised sherds no particular phase was identified suggesting possible organic pigments or resulting from the firing technique. The chemistry and mineralogy of the paste almost always overlap that of the paints; painted layer is irregular and partially worn by years of burial.

This paper expands on an earlier one by Laguens et al. (2007) presented at the First Argentine Ar... more This paper expands on an earlier one by Laguens et al. (2007) presented at the First Argentine Archaeometry Meeting, in Rosario, 2005. This version includes the analysis of new sherds and clay sources. The title makes a reference to the proximity of the Ambato valley to the yungas (mountainous subtropical forests).Fil: Giesso, Martín. University of Chicago; Estados UnidosFil: Laguens, Andres Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; ArgentinaFil: Bertolino, Silvana Raquel Alina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaFil: Boulanger, Matthew T.. Southern Methodist University; Estados...

La alta generación de lodos, tanto de plantas potabilizadoras como depuradoras, es una problemáti... more La alta generación de lodos, tanto de plantas potabilizadoras como depuradoras, es una problemática ambiental de gran interés en la actualidad. En la actualidad existe una tendencia de aprovechar estos lodos, bajo ciertas normativas que regulan su uso. Este trabajo presenta las principales propiedades físicas, químicas y mineralógicas de los lodos generados en la planta potabilizadora de agua ?Suquía? de la Ciudad de Córdoba, Argentina. Estos lodos, con un muy alto contenido de agua, en la actualidad se disponen con los residuos sólidos urbanos de la ciudad. El propósito de este trabajo es discutir las posibles alternativas de tratamiento de los lodos con el objeto de densificar los mismos y analizar su potencial uso como material inerte en mezclas de suelo-lodo. Las características estudiadas incluyen propiedades físicas, medición de granulometría, superficie específica, microscopía de barrido electrónico, análisis químicos y contenido de materia orgánica. En particular, se evalúa ...

Radiation Physics and Chemistry, 2013

This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/authorsrights

Asociación Argentina de Geología Aplicada a la Ingeniería, Nov 1, 2015

Applied Clay Science, 2016

Abstract The provenance of the raw materials used to produce ordinary ceramic vessel of the Aguad... more Abstract The provenance of the raw materials used to produce ordinary ceramic vessel of the Aguada Culture (4th to 12th c. AC) from the Ambato Valley (Catamarca, Argentina) has been evaluated. Since there are no commercial clay deposits in the area, local clayish sources were selected as possible candidates. Samples were collected from Precambrian to Low Paleozoic metapelites, clays from fault gouges derived from crystalline basement rocks, epiclastic rocks and Quaternary loessic sediments that filled the valley and crop out close to the archaeological sites. The pottery sherds were found at Piedras Blancas highly hierarchical site. Mineralogical and geochemical studies were conducted by XRD and FE-SEM-EDS on both the pot sherds and the possible source materials. The latter were also preliminary evaluated on basic physical and technological properties; test specimens were heated at different temperatures (800, 900 and 1000 °C) to study their thermal behavior and their mineralogical and textural transformations. The physical properties of the metapelites, the clay gouges and the loessic sediments suggest that they are suitable for ceramic production. The epiclastic rocks are mostly bentonitic and could have been used as additives to improve the plasticity and other properties of other clay materials. The mineralogy of the sherds is quite homogeneous with no significant differences between technological classes E and D; most of them bear either phlogopite, hornblende and/or hypersthene and high temperature phases (diopside, spinel, mullite and cristobalite) also found in some clays under natural conditions or after firing at 1000 °C. Commonly used provenance geochemical ratios are relatively similar in all pottery samples and in the selected source rocks and comparable with typical UCC. Hence, according to those values, all samples are related to each other and indistinguishable except for one sample (B30) highly enriched in REE. Nearly all raw materials and ceramics are either enriched in Cs, Bi, Sb or in any of these elements. The trend of using local materials for the pottery is suggested by the mineralogy and the geochemistry.

Sedimentary Geology, 2015

Abstract We report results from FE-SEM–EDS, geochemical, mineralogical analyses and Raman spectro... more Abstract We report results from FE-SEM–EDS, geochemical, mineralogical analyses and Raman spectroscopy of pottery of bucket-shaped ceramic from Rogaland (southwestern Norway) dated between the 5th and 6th Century. The study reveals a very rare pottery composition including asbestos-group minerals and an unusual enrichment in compatible elements like Cr (8–27 × Post Archean average shale (PAS), McLennan et al., 2006), Ni (2–8 × normal shale) and Co (2–3 × PAS). X-Rray diffraction and Raman spectroscopy could pinpoint that Ni is introduced by specific Ni-rich talc mineral and chlorite minerals and Cr occurs in a rare Cr-rich talc, and possibly in a Cr-chlorite, these minerals are the most abundant in the pottery, which is supported by strong enrichment in Mg (10–20 × PAS). The addition of Mg, Cr, Ni and Co and other compatible trace elements is to our current knowledge not caused by anthropogenic activity but related to the used materials, which are alteration products of mafic and ultramafic rocks or genetically related to mafic and ultramafic rocks. Rocks of this type are exposed in vicinity of the sampling areas in a region called Karmoy, hosting a world famous ophiolite complex, which is identified as the major source for the mafic and ultramafic component, as the next succession of a similar composition is far further north located in Norway and a number of rock types on Karmoy matches the chemical composition of the pottery. The here reported composition is spectacular and extremely rare – if ever found – in pottery. Our study shows that unusual material sources have been used in pottery production, and this opens for discussion whether the materials were deliberately selected by the manufacturers, thereby expressing a specific social function, in a time period where more functional clay types and additives, and certainly functional and sufficient for use in pottery, where abundant in areas of Rogaland closer to where the pots were found.

interés en la actualidad. En la actualidad existe una tendencia de aprovechar estos lodos, bajo c... more interés en la actualidad. En la actualidad existe una tendencia de aprovechar estos lodos, bajo ciertas normativas que regulan su uso. Este trabajo presenta las principales propiedades físicas, químicas y mineralógicas de los lodos generados en la planta potabilizadora de agua “Suquía” de la Ciudad de Córdoba, Argentina. Estos lodos, con un muy alto contenido de agua, en la actualidad se disponen con los residuos sólidos urbanos de la ciudad. El propósito de este trabajo es discutir las posibles alternativas de tratamiento de los lodos con el objeto de densificar los mismos y analizar su potencial uso como material inerte en mezclas de suelo-lodo. Las características estudiadas incluyen propiedades físicas, medición de granulometría, superficie específica, microscopía de barrido electrónico, análisis químicos y contenido de materia orgánica. En particular, se evalúa cómo la presencia de lodo afecta el comportamiento de limos recompactados con el objeto de poder construir terraplenes...

Microchemical Journal, 2010

$Research paper thumbnail of Evaluation of the compositional changes during flooding of reactive fluids using scanning electron microscopy, nano-secondary ion mass spectrometry, x-ray diffraction and whole rock geochemistry$

techniques were applied to characterize and differentiate surface paintings of archeological pott... more techniques were applied to characterize and differentiate surface paintings of archeological pottery from the Aguada Ambato and Portezuelo styles (Catamarca, Argentina). Standard procedures are not always appropriate for such samples (paint layers are porous, nonplanar and discontinue). Image processing is necessary when chemical contrast is not discriminated. Soft x-ray lines (e.g. Fe L) are more revealing because those detected come from shallower depths, clearly depicting the composition of the paint layer. These styles differ in mineralogy and chemistry suggesting that they are two distinctive entities not only on their designs but also on the materials chosen and the technology used. Aguada Portezuelo paints contain Ca (white), Fe–Mn (black), Fe–Mn–Ca (dark reddish) and Fe–Ca (reddish). The white ones correspond to gehlenite, a firing product (possible firing temperature ≥900–1000 ◦C); calcite and CaO occur in cases of firing temperatures<900 ◦C. Aguada Ambato presents diffi...

Boletín de Arqueología PUCP, 2019

Journal of Petroleum Science and Engineering