Počet záznamů: 1
Procedures for diatom analyses and hydrodynamic separation of extreme wave paleo-deposits from tropical sediment environments
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SYSNO ASEP 0566176 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Procedures for diatom analyses and hydrodynamic separation of extreme wave paleo-deposits from tropical sediment environments Tvůrce(i) Černý, Jan (GLU-S) RID, ORCID, SAI
Ramírez-Herrera, M.-T. (MX)
Caballero, M. (MX)Číslo článku 106970 Zdroj.dok. Marine Geology. - : Elsevier - ISSN 0025-3227
Roč. 455, January 2023 (2023)Poč.str. 5 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Diatom analysis techniques ; Hydrodynamic separation ; Humid tropics ; Extreme-wave deposits ; Paleo-environments ; Tsunami deposits Obor OECD Geology Způsob publikování Omezený přístup Institucionální podpora GLU-S - RVO:67985831 UT WOS 000904133900003 EID SCOPUS 85144353456 DOI 10.1016/j.margeo.2022.106970 Anotace Diatoms are an important proxy in tsunami and storm research studies to determine potential sediment source and changes in environments pre- and post-event. However, the use of this proxy has proven challenging when studying extreme wave paleo events in sediments from the humid tropics because of the scarcity of diatoms in sand beds, and in clay or silt beds above and below. This problem has been associated with (1) dissolution of diatom valves in the humid tropics, (2) rate of burial and poor preservation of tsunami deposits, and (3) sediment and diatom size. Here we propose a practical solution to this problem – using hydrodynamic separation in the analysis of diatoms of extreme wave paleo-deposits. We compare diatom identification results from selected sand beds and units above and below, collected in a humid tropical environment (Guerrero, Mexico) using a standard procedure and the proposed fast hydrodynamic separation procedure to concentrate diatom-sized fraction. Thanks to the newly proposed methodology, the results showed a significant improvement in the number of observed diatom data in the studied sand units. We discuss two different techniques to achieve this aim and suggest how improvements on the quantitative research of diatoms from extreme wave deposits, particularly tsunamis, from the humid tropics. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2024 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0025322722002419
Počet záznamů: 1