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Geosciences 2018, 8(5), 176; https://doi.org/10.3390/geosciences8050176

Low Cost, Lightweight Gravity Coring and Improved Epoxy Impregnation Applied to Laminated Maar Sediment in Vietnam

1
Institute of Geography, University of Bremen, Celsiusstrasse 2, D-28359 Bremen, Germany
2
Faculty of Geology, VNU University of Science (HUS), 334 Nguyen Trai, Thanh Xuan District, Hanoi, Vietnam
3
Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN 47405-1403, USA
*
Author to whom correspondence should be addressed.
Received: 4 April 2018 / Revised: 4 May 2018 / Accepted: 7 May 2018 / Published: 11 May 2018
(This article belongs to the Special Issue New Theoretical and Applied Advances in Paleolimnology)
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Abstract

In response to the need for lightweight and affordable sediment coring and high-resolution structural documentation of unconsolidated sediment, we developed economical and fast methods for (i) recovering short sediment cores with undisturbed topmost sediment, without the need for a firmly anchored coring platform, and (ii) rapid epoxy-impregnation of crayon-shaped subcores in preparation for thin-sectioning, with minimal use of solvents and epoxy resin. The ‘Autonomous Gravity Corer’ (AGC) can be carried to remote locations and deployed from an inflatable or makeshift raft. Its utility was tested on modern unconsolidated lacustrine sediment from a ~21 m deep maar lake in Vietnam’s Central Highlands near Pleiku. The sedimentary fabric fidelity of the epoxy-impregnation method was demonstrated for finely laminated artificial flume sediment. Our affordable AGC is attractive not only for work in developing countries, but lends itself broadly for coring in remote regions where challenging logistics prevent the use of heavy coring equipment. The improved epoxy-impregnation technique saves effort and costly chemical reagents, while at the same time preserving the texture of the sediment. View Full-Text
Keywords: core catcher; epoxy resin; gravity corer; impregnation; limnology; sediment corer; thin section core catcher; epoxy resin; gravity corer; impregnation; limnology; sediment corer; thin section
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Schimmelmann, J.P.; Nguyễn-Văn, H.; Nguyễn-Thuỳ, D.; Schimmelmann, A. Low Cost, Lightweight Gravity Coring and Improved Epoxy Impregnation Applied to Laminated Maar Sediment in Vietnam. Geosciences 2018, 8, 176.

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