New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii
Abstract Thellier-type paleointensity experiments associated with partial thermal remanent magnetization checks have been widely used to determine paleointensity values from volcanic and archaeological media. However, previous studies have revealed that a substantial portion of paleointensity result...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-07-01
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| Series: | Earth, Planets and Space |
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| Online Access: | https://doi.org/10.1186/s40623-021-01473-6 |
| _version_ | 1818650146341126144 |
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| author | Doohee Jeong Qingsong Liu Yuhji Yamamoto Yongjae Yu Xiang Zhao Huafeng Qin |
| author_facet | Doohee Jeong Qingsong Liu Yuhji Yamamoto Yongjae Yu Xiang Zhao Huafeng Qin |
| author_sort | Doohee Jeong |
| collection | DOAJ |
| description | Abstract Thellier-type paleointensity experiments associated with partial thermal remanent magnetization checks have been widely used to determine paleointensity values from volcanic and archaeological media. However, previous studies have revealed that a substantial portion of paleointensity results with positive checks for historical lava samples largely fails to predict known Earth magnetic field intensity values. To determine the fidelity of paleointensity values, conventional Thellier-type paleointensity experiments were performed on Kilauea lava flows that erupted in 1960. The positive partial thermal remanent magnetization checks for our results range from 30.28 ± 1.38 µT to 52.94 ± 1.89 µT. This strongly indicates that conventional paleointensity checks cannot guarantee the fidelity of paleointensity results, especially when the unblocking temperatures for the newly formed magnetic particles are higher than the treatment temperature. Therefore, in this study, to check for thermal alteration during heating, the temperature dependence of the hysteresis parameter measured at room temperature for the thermally treated samples was also measured. Our new results show that nearly all biased paleointensity values correspond to a ratio of the coercivity of remanence to the magnetic coercivity of > 3 and a chemical alteration index > ~ 10%, which indicates the strong effect of the domain state and thermal alteration on the fidelity of the paleointensity results. Our study provides feasible criteria to further improve the fidelity of paleointensity estimations. |
| first_indexed | 2024-12-17T01:45:35Z |
| format | Article |
| id | doaj.art-d303203fcc2b4fe68f29dc7e7b88fde7 |
| institution | Directory Open Access Journal |
| issn | 1880-5981 |
| language | English |
| last_indexed | 2024-12-17T01:45:35Z |
| publishDate | 2021-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Earth, Planets and Space |
| spelling | doaj.art-d303203fcc2b4fe68f29dc7e7b88fde72022-12-21T22:08:12ZengSpringerOpenEarth, Planets and Space1880-59812021-07-0173111010.1186/s40623-021-01473-6New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, HawaiiDoohee Jeong0Qingsong Liu1Yuhji Yamamoto2Yongjae Yu3Xiang Zhao4Huafeng Qin5Centre for Marine Magnetism (CM2), Department of Ocean Science and Engineering, Southern University of Science and TechnologyCentre for Marine Magnetism (CM2), Department of Ocean Science and Engineering, Southern University of Science and TechnologyCenter for Advanced Marine Core Research, Kochi UniversityDepartment of Geological Sciences, Chungnam National UniversityResearch School of Earth Sciences, Australian National UniversityPalaeomagnetism and Geochronology Laboratory, State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of SciencesAbstract Thellier-type paleointensity experiments associated with partial thermal remanent magnetization checks have been widely used to determine paleointensity values from volcanic and archaeological media. However, previous studies have revealed that a substantial portion of paleointensity results with positive checks for historical lava samples largely fails to predict known Earth magnetic field intensity values. To determine the fidelity of paleointensity values, conventional Thellier-type paleointensity experiments were performed on Kilauea lava flows that erupted in 1960. The positive partial thermal remanent magnetization checks for our results range from 30.28 ± 1.38 µT to 52.94 ± 1.89 µT. This strongly indicates that conventional paleointensity checks cannot guarantee the fidelity of paleointensity results, especially when the unblocking temperatures for the newly formed magnetic particles are higher than the treatment temperature. Therefore, in this study, to check for thermal alteration during heating, the temperature dependence of the hysteresis parameter measured at room temperature for the thermally treated samples was also measured. Our new results show that nearly all biased paleointensity values correspond to a ratio of the coercivity of remanence to the magnetic coercivity of > 3 and a chemical alteration index > ~ 10%, which indicates the strong effect of the domain state and thermal alteration on the fidelity of the paleointensity results. Our study provides feasible criteria to further improve the fidelity of paleointensity estimations.https://doi.org/10.1186/s40623-021-01473-6Thellier-type experimentPaleointensityDomain stateThermal alteration |
| spellingShingle | Doohee Jeong Qingsong Liu Yuhji Yamamoto Yongjae Yu Xiang Zhao Huafeng Qin New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii Earth, Planets and Space Thellier-type experiment Paleointensity Domain state Thermal alteration |
| title | New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii |
| title_full | New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii |
| title_fullStr | New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii |
| title_full_unstemmed | New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii |
| title_short | New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii |
| title_sort | new criteria for selecting reliable thellier type paleointensity results from the 1960 kilauea lava flows hawaii |
| topic | Thellier-type experiment Paleointensity Domain state Thermal alteration |
| url | https://doi.org/10.1186/s40623-021-01473-6 |
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