Application of Terrestrial LiDAR for Reconstructing 3D Images of Fault Trench Sites and Web-based Visualization Platform for Large Point Clouds

Lee, Byung Woo; Kim, Seung‐Sep

doi:10.9719/eeg.2021.54.2.177

Cited by 2 publications

(1 citation statement)

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“…Although several previous studies have examined the paleomagnetic characteristics of the Hantangang River [3,[27][28][29], none have utilized AMS analysis. In this study, we conducted a rigorous AMS analysis of Quaternary basalt outcrops along the Hantangang River to determine the source of the lava and gain insights into the paleo-river channels in this study's area.…”

Section: Introductionmentioning

confidence: 99%

Preferred Orientations of Magnetic Minerals Inferred from Magnetic Fabrics of Hantangang Quaternary Basalts

Park,

Shin,

Shin

et al. 2023

Minerals

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This paper presents a comprehensive analysis of the anisotropy of magnetic susceptibility (AMS) and paleomagnetic data from Quaternary basalt outcrops along the Hantangang River, Korea. A total of 554 samples were collected from 20 sites, representing three distinct units, Unit I, Unit II, and Unit III. Paleomagnetic data reveal a difference in the timing of eruptions between Units I and II, suggesting distinct periods by volcanic episodes. The mineral magnetic analysis identified titanomagnetite as the dominant magnetic carrier in the samples. AMS results indicated weak anisotropy and scattered AMS directions, indicating a low degree of preferred orientation of grains within the basalt rocks. The inverse AMS fabrics observed at specific sites are attributed to single-domain (SD) grains. Comparing the AMS data with the anisotropy of anhysteretic remanent magnetization (AARM) data, three distinct types of magnetic fabrics (normal, intermediate, and inverse) were discerned. The magnetic fabric was utilized to ascertain the flow direction based on the findings obtained from the AMS results. The findings suggest that the Quaternary basalts in this study’s area were primarily confined to the Hantangang River channel and its immediate vicinity during lava flow. However, distinct flow patterns are observed in the southwestern region, implying the presence of unknown volcanic sources.

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Section: Introductionmentioning

confidence: 99%