Rapid Magnetic Susceptibility Characterization of Coastal Morphosedimentary Units at Two Insular Strandplains in Estonia
Coastal archives of changing hydrometeorological conditions include mineralogical anomalies, such as heavy-mineral concentrations (HMCs) of variable thickness and intensity, which contain varying ferrimagnetic (e.g., magnetite) fractions. As an effective alternative to laborious mineralogical and gr...
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| Format: | Article |
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MDPI AG
2023-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/2/232 |
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| author | Ilya V. Buynevich Hannes Tõnisson Alar Rosentau Tiit Hang Are Kont Toru Tamura Sten Suuroja Valdeko Palginõmm Sophia F. S. Döring |
| author_facet | Ilya V. Buynevich Hannes Tõnisson Alar Rosentau Tiit Hang Are Kont Toru Tamura Sten Suuroja Valdeko Palginõmm Sophia F. S. Döring |
| author_sort | Ilya V. Buynevich |
| collection | DOAJ |
| description | Coastal archives of changing hydrometeorological conditions include mineralogical anomalies, such as heavy-mineral concentrations (HMCs) of variable thickness and intensity, which contain varying ferrimagnetic (e.g., magnetite) fractions. As an effective alternative to laborious mineralogical and granulometric analysis, we present the first set of bulk-volume low-field magnetic susceptibility (MS) databases from beach and dune lithosomes in the Western Estonian archipelago: Harilaid cuspate foreland (westernmost Saaremaa Island) and Tahkuna strandplain (northernmost Hiiumaa Island). Readings were conducted both <i>in situ</i> from trench walls and on core subsamples. At the Tahkuna site, late Holocene beach ridges reveal substantially lower values: quartz-dominated dune sequences grade from 5–20 μSI downward to diamagnetically dominated (−1–7 μSI) beach facies. Values are higher (20–140 μSI) in historically reactivated parabolic dunes that are encroaching southward over the strandplain. At the Harilaid site, four beach dune ridges (height: 2–3 m) that span the past 250–300 years show a general increase in mean MS from 320–850 μSI with decreasing age, with peaks of 1000–2000 μSI below the dune crests (depth: ~0.3–0.6 m) likely related to contemporary wind acceleration during ridge aggradation. The highest mineralogical anomalies range from 2000–5500 μSI in the historic dune sections and exceed 8000 μSI along the actively eroding upper-berm segments, typical of HMCs generated by moderate storms. MS anomalies are likely correlated with high-amplitude electromagnetic signal responses in georadar records and provide useful information for optical luminescence sampling strategies. Our study demonstrates that magnetic susceptibility trends provide a useful means of rapidly assessing relative temporal changes in overall wave/wind climates, help identify and correlate discrete anomalies related to extreme events, serve as local beach/dune boundary indicators, and represent potentially quantifiable paleo-energy indices. |
| first_indexed | 2024-03-11T08:36:31Z |
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| id | doaj.art-5970e30d983a43a2b4ed4d905959cdcc |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-11T08:36:31Z |
| publishDate | 2023-01-01 |
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| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-5970e30d983a43a2b4ed4d905959cdcc2023-11-16T21:26:21ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-01-0111223210.3390/jmse11020232Rapid Magnetic Susceptibility Characterization of Coastal Morphosedimentary Units at Two Insular Strandplains in EstoniaIlya V. Buynevich0Hannes Tõnisson1Alar Rosentau2Tiit Hang3Are Kont4Toru Tamura5Sten Suuroja6Valdeko Palginõmm7Sophia F. S. Döring8Department of Earth and Environmental Science, Temple University, 1901 N 13th St., Philadelphia, PA 19122, USAInstitute of Ecology, Tallinn University, 10120 Tallinn, EstoniaInstitute of Ecology and Earth Sciences, University of Tartu, 50409 Tartu, EstoniaInstitute of Ecology and Earth Sciences, University of Tartu, 50409 Tartu, EstoniaInstitute of Ecology, Tallinn University, 10120 Tallinn, EstoniaGeological Survey of Japan (AIST), Tsukuba, Central 7, 1-1-1, Higashi, Tsukuba 305-8567, JapanGeological Survey of Estonia, 12618 Tallinn, EstoniaInstitute of Ecology, Tallinn University, 10120 Tallinn, EstoniaHochschule Bremen, 28199 Bremen, GermanyCoastal archives of changing hydrometeorological conditions include mineralogical anomalies, such as heavy-mineral concentrations (HMCs) of variable thickness and intensity, which contain varying ferrimagnetic (e.g., magnetite) fractions. As an effective alternative to laborious mineralogical and granulometric analysis, we present the first set of bulk-volume low-field magnetic susceptibility (MS) databases from beach and dune lithosomes in the Western Estonian archipelago: Harilaid cuspate foreland (westernmost Saaremaa Island) and Tahkuna strandplain (northernmost Hiiumaa Island). Readings were conducted both <i>in situ</i> from trench walls and on core subsamples. At the Tahkuna site, late Holocene beach ridges reveal substantially lower values: quartz-dominated dune sequences grade from 5–20 μSI downward to diamagnetically dominated (−1–7 μSI) beach facies. Values are higher (20–140 μSI) in historically reactivated parabolic dunes that are encroaching southward over the strandplain. At the Harilaid site, four beach dune ridges (height: 2–3 m) that span the past 250–300 years show a general increase in mean MS from 320–850 μSI with decreasing age, with peaks of 1000–2000 μSI below the dune crests (depth: ~0.3–0.6 m) likely related to contemporary wind acceleration during ridge aggradation. The highest mineralogical anomalies range from 2000–5500 μSI in the historic dune sections and exceed 8000 μSI along the actively eroding upper-berm segments, typical of HMCs generated by moderate storms. MS anomalies are likely correlated with high-amplitude electromagnetic signal responses in georadar records and provide useful information for optical luminescence sampling strategies. Our study demonstrates that magnetic susceptibility trends provide a useful means of rapidly assessing relative temporal changes in overall wave/wind climates, help identify and correlate discrete anomalies related to extreme events, serve as local beach/dune boundary indicators, and represent potentially quantifiable paleo-energy indices.https://www.mdpi.com/2077-1312/11/2/232stormmorphostratigraphymagnetiteparamagneticgeoradar |
| spellingShingle | Ilya V. Buynevich Hannes Tõnisson Alar Rosentau Tiit Hang Are Kont Toru Tamura Sten Suuroja Valdeko Palginõmm Sophia F. S. Döring Rapid Magnetic Susceptibility Characterization of Coastal Morphosedimentary Units at Two Insular Strandplains in Estonia Journal of Marine Science and Engineering storm morphostratigraphy magnetite paramagnetic georadar |
| title | Rapid Magnetic Susceptibility Characterization of Coastal Morphosedimentary Units at Two Insular Strandplains in Estonia |
| title_full | Rapid Magnetic Susceptibility Characterization of Coastal Morphosedimentary Units at Two Insular Strandplains in Estonia |
| title_fullStr | Rapid Magnetic Susceptibility Characterization of Coastal Morphosedimentary Units at Two Insular Strandplains in Estonia |
| title_full_unstemmed | Rapid Magnetic Susceptibility Characterization of Coastal Morphosedimentary Units at Two Insular Strandplains in Estonia |
| title_short | Rapid Magnetic Susceptibility Characterization of Coastal Morphosedimentary Units at Two Insular Strandplains in Estonia |
| title_sort | rapid magnetic susceptibility characterization of coastal morphosedimentary units at two insular strandplains in estonia |
| topic | storm morphostratigraphy magnetite paramagnetic georadar |
| url | https://www.mdpi.com/2077-1312/11/2/232 |
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