Mineralogical Characterization of Rocks Composing the Volcanic Body that Crops Out near Town of Iza, Boyacá, Colombia. Petrography, Metallography and Elemental Analysis by Scanning Electronic Microscope
We present here the results of detailed analysis of four samples from the Iza Volcanic body. The analysis were done at Gmas* Laboratory using and array of tools available there: Optical microscopy for petrographic, and metallographic study of polished thin sections; a SEM with BSE, SE and EDAX allow...
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| Format: | Online |
| Language: | spa |
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Universidad Pedagógica y Tecnológica de Colombia - UPTC
2010
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| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/3398 |
| _version_ | 1801706682474037248 |
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| author | Contreras-Fayad, David Andrei Jaramillo-Mejía, José María |
| author_facet | Contreras-Fayad, David Andrei Jaramillo-Mejía, José María |
| author_sort | Contreras-Fayad, David Andrei |
| collection | OJS |
| description | We present here the results of detailed analysis of four samples from the Iza Volcanic body. The analysis were done at Gmas* Laboratory using and array of tools available there: Optical microscopy for petrographic, and metallographic study of polished thin sections; a SEM with BSE, SE and EDAX allowed the elemental chemical composition of minerals present in the samples, and finally we use XRD for mineral identification. The strong hydrothermal alteration of the Iza volcanic rocks was evident in the all the analyses that were carried out, we identified the presence of minerals as the tridymite, the opal, the chalcedony, epidote (pistacita), and alunite , this last mineral is usually replacing potassic feldspars. The metallographic study showed a prevalence of the pyrite and the rutile in relation to the total of metallic minerals in veins and its surrounding area. By means of the optical petrography and elemental analysis with the EDAX, it was possible the identification of the amphiboles. On the other hand, X-ray diffraction was of vital importance in determining the presence of sanidine (highly disordered). We also found that sanidine is not the only K2O rich phase on these volcanic rocks. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-3398 |
| institution | Revista Ingeniería, Investigación y Desarrollo |
| language | spa |
| publishDate | 2010 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia - UPTC |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-33982017-09-02T02:47:39Z Mineralogical Characterization of Rocks Composing the Volcanic Body that Crops Out near Town of Iza, Boyacá, Colombia. Petrography, Metallography and Elemental Analysis by Scanning Electronic Microscope Caracterización mineralógica de las rocas que componen el cuerpo volcánico que aflora en cercanías al municipio de Iza, Boyacá, Colombia. Petrografía, metalografía y análisis elemental por medio de un microscopio electrónico de barrido Contreras-Fayad, David Andrei Jaramillo-Mejía, José María amphiboles hydrothermal alteration hydrothermal phase magmatic phase rutile sanidine alteración hidrotermal anfíboles fase hidrotermal fase magmática rutilo sanidina We present here the results of detailed analysis of four samples from the Iza Volcanic body. The analysis were done at Gmas* Laboratory using and array of tools available there: Optical microscopy for petrographic, and metallographic study of polished thin sections; a SEM with BSE, SE and EDAX allowed the elemental chemical composition of minerals present in the samples, and finally we use XRD for mineral identification. The strong hydrothermal alteration of the Iza volcanic rocks was evident in the all the analyses that were carried out, we identified the presence of minerals as the tridymite, the opal, the chalcedony, epidote (pistacita), and alunite , this last mineral is usually replacing potassic feldspars. The metallographic study showed a prevalence of the pyrite and the rutile in relation to the total of metallic minerals in veins and its surrounding area. By means of the optical petrography and elemental analysis with the EDAX, it was possible the identification of the amphiboles. On the other hand, X-ray diffraction was of vital importance in determining the presence of sanidine (highly disordered). We also found that sanidine is not the only K2O rich phase on these volcanic rocks. Por medio de análisis petrográficos, metalográficos, de composición química elemental con un SEM (EDAX) y análisis de difracción de Rayos X de cuatro secciones delgadas y pulidas y sus respectivas muestras de roca provenientes del cuerpo volcánico de Iza, se logra desarrollar una caracterización mineralógica completa de las mismas. La fuerte alteración hidrotermal que presentan dichas rocas volcánicas es evidente en los diferentes análisis que se realizaron, gracias a la presencia de minerales como la tridimita, el ópalo, la calcedonia, epidota (pistacita), y alunita, este último mineral está usualmente reemplazando al feldespato potásico. El estudio metalográfico mostró un predominio de pirita y rutilo en relación al total de minerales metálicos en venillas y sus inmediaciones. Por medio de la interrelación entre petrografía y análisis elementales con microsonda EDAX, fue posible la identificación de los anfíboles. De otro lado la difracción de rayos X fue de vital importancia en determinar la presencia de sanidinas formadas durante la fase magmática. Estas sanidinas no son los únicos minerales que aportan K2O a la roca. Universidad Pedagógica y Tecnológica de Colombia - UPTC 2010-12-02 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/3398 Ingeniería Investigación y Desarrollo; Vol. 10 No. 2: julio-diciembre de 2010; 35-54 Ingeniería Investigación y Desarrollo; Vol. 10 Núm. 2: julio-diciembre de 2010; 35-54 2422-4324 1900-771X spa https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/3398/3040 Derechos de autor 2010 Ingeniería Investigación y Desarrollo |
| spellingShingle | amphiboles hydrothermal alteration hydrothermal phase magmatic phase rutile sanidine alteración hidrotermal anfíboles fase hidrotermal fase magmática rutilo sanidina Contreras-Fayad, David Andrei Jaramillo-Mejía, José María Mineralogical Characterization of Rocks Composing the Volcanic Body that Crops Out near Town of Iza, Boyacá, Colombia. Petrography, Metallography and Elemental Analysis by Scanning Electronic Microscope |
| title | Mineralogical Characterization of Rocks Composing the Volcanic Body that Crops Out near Town of Iza, Boyacá, Colombia. Petrography, Metallography and Elemental Analysis by Scanning Electronic Microscope |
| title_alt | Caracterización mineralógica de las rocas que componen el cuerpo volcánico que aflora en cercanías al municipio de Iza, Boyacá, Colombia. Petrografía, metalografía y análisis elemental por medio de un microscopio electrónico de barrido |
| title_full | Mineralogical Characterization of Rocks Composing the Volcanic Body that Crops Out near Town of Iza, Boyacá, Colombia. Petrography, Metallography and Elemental Analysis by Scanning Electronic Microscope |
| title_fullStr | Mineralogical Characterization of Rocks Composing the Volcanic Body that Crops Out near Town of Iza, Boyacá, Colombia. Petrography, Metallography and Elemental Analysis by Scanning Electronic Microscope |
| title_full_unstemmed | Mineralogical Characterization of Rocks Composing the Volcanic Body that Crops Out near Town of Iza, Boyacá, Colombia. Petrography, Metallography and Elemental Analysis by Scanning Electronic Microscope |
| title_short | Mineralogical Characterization of Rocks Composing the Volcanic Body that Crops Out near Town of Iza, Boyacá, Colombia. Petrography, Metallography and Elemental Analysis by Scanning Electronic Microscope |
| title_sort | mineralogical characterization of rocks composing the volcanic body that crops out near town of iza boyaca colombia petrography metallography and elemental analysis by scanning electronic microscope |
| topic | amphiboles hydrothermal alteration hydrothermal phase magmatic phase rutile sanidine alteración hidrotermal anfíboles fase hidrotermal fase magmática rutilo sanidina |
| topic_facet | amphiboles hydrothermal alteration hydrothermal phase magmatic phase rutile sanidine alteración hidrotermal anfíboles fase hidrotermal fase magmática rutilo sanidina |
| url | https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/3398 |
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