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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Paleomagnetic study of basaltic rocks from Baengnyeong Island, Korea: efficiency of the Tsunakawa–Shaw paleointensity determination on non-SD-bearing materials and implication for the early Pliocene geomagnetic field intensity

Fig. 2

Summary of rock magnetic results. a High-temperature strong-field thermomagnetic curves between the room temperature and 700 °C on two subsamples (B1A-1 and B2C-1). Solid (dotted) line shows heating (cooling) curve. b Low-temperature heating curves of ZFC and FC remanences from 10 to 300 K on a subsample B1A-1. c Low-temperature low-field thermomagnetic curves (only heating curves) of the in-phase magnetic susceptibility (m′) and the out-of-phase susceptibility (m″) with different frequencies on a subsample B1A-1. d Mrs/Ms versus Bcr/Bc diagram for the studied samples (square symbols) yielding an acceptable Tsunakawa–Shaw API estimate (see Table 2), with the theoretical curves for mixtures of SD and MD particles (three dashed lines), for the mixtures of SD and SP (10 nm in size) particles (two long-dashed lines) by Dunlop (2002a, b), and the BDS trend line (solid line) with labels of some BDS values (diamond symbols) by Paterson et al. (2017). e FORC diagrams for two subsamples B1A-1_5 and B2C-1_4 with a smoothing factor = 10

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