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Mineralogical Chara...
Mineralogical Characterization of Di Linh Bentonite, Vietnam: A Methodological Approach of X-ray Diffraction and Transmission Electron Microscopy
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- Hoang-Minh, Thao (författare)
- Hanoi University of Science, Vietnam National University
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- Nguyen-Thanh, Lan (författare)
- Institute of Geography and Geology, Ernst-Moritz-Arndt-University of Greifswald, Technical University of Darmstadt
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- Nguyen, Thuy-Duong (författare)
- Hanoi University of Science, Vietnam National University
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- Nguyen, Duc-Thanh (författare)
- Vietnam Atomic Energy Institute
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- Lai, Le Thi (författare)
- Institute of Geological Sciences, Vietnam Academy of Science and Technology
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- Thuyet, Nguyen Thi Minh (författare)
- Hanoi University of Science, Vietnam National University
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- Kasbohm, Jörn (författare)
- Institute of Geography and Geology, Ernst-Moritz-Arndt-University of Greifswald, University of Greifswald, GeoENcon Ltd
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- Pusch, Roland (författare)
- Luleå tekniska universitet,Geoteknologi
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- Knutsson, Sven (författare)
- Luleå tekniska universitet,Geoteknologi
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(creator_code:org_t)
- Hanoi : Vietnam National University Press, Hanoi, 2014
- 2014
- Engelska.
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Ingår i: Proceedings of 13th International Symposium on Mineral Exploration (ISME-XIII). - Hanoi : Vietnam National University Press, Hanoi. - 9786046215400 ; , s. 143-148
- Relaterad länk:
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https://ltu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Vietnam has decided to establish nuclear power as further energy option. In order to develop a Vietnamese reference bentonite as potential barrier in a final repository for high radioactive waste, a detailed mineralogical investigation of Di Linh bentonite (Lam Dong province), lacustrine clay, was carried out by different methods especially transmission electron microscopy (TEM) linked with energy-dispersive X-ray (EDX). From a sample homogenized from 5 tones of the bentonite, mineral formulae of clay particles was calculated The calculation also focuses on randomly interstratifications of two and three members. The fraction <2 μm of Di Linh bentonite is composed mainly by montmorillonite (Ca0.06Mg0.03Na0.09K0.03Al1.39Fe0.25Mg0.26(OH)2 Si3.96Al0.04O10) and regular ordering (R1) illite-smectite interstratifications with K- and charge-deficiency (Ca0.04Mg0.07Na0.18K0.16Al1.76Fe0.08Mg0.16(OH)2Si3.62Al0.38O10). Additionally, Fe-poor kaolinite-smectite-vermiculite interstratifications and trace of Fe-rich chloritesmectite- vermiculite interstatifications were identified. TEM-investigations showed analytical proofs of the sedimentary character of smectite formation in the Di Linh deposit. Parent muscovite was weathered in several steps in two different environments: (i) K-leaching and layer-wise alteration into kaolinite; (ii) further edge- controlled alteration of mica into lathlike montmorillonite particles under dissolution of kaolinite layers from former kaolinite-mica intergrowths. Mineralogical composition of the Di Linh bentonite with mainly montmorillonite and illite-rich illite-smectite interstratifications shows that the Di Linh bentonite can be a suitable barrier candidate in final repositories.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Geoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Geotechnical Engineering (hsv//eng)
Nyckelord
- Bentonite
- Transmission electron microscopy
- X-ray diffraction
- Montmorillonite
- Interstratification
- Geoteknik
- Soil Mechanics
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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