Electrical Conductivity of (Mg, Fe)CO3 at the Spin Crossover and Its Implication for Mid‐Mantle Geomagnetic Heterogeneities

• Published in: Geophysical research letters Vol. 51; no. 22
• Main Authors: Zhao, Chaoshuai, Liu, Jin, Xu, Liangxu, Hou, Mingqiang, Zhuang, Yukai, Zhu, Jie, Lin, Jung‐Fu
• Format: Journal Article
• Language: English
• Published: Washington John Wiley & Sons, Inc 28.11.2024
• Subjects: (Mg, Fe)CO3; Anomalies; Bearing materials; Carbon; Depth; Diamonds; Electrical conductivity; Electrical resistivity; Geomagnetic anomalies; geomagnetic anomaly; Geomagnetic observations; Geomagnetism; high pressure; High temperature; High temperature effects; Iron carbonate; Iron content; Iron oxides; Lower mantle; Magnesium; Magnetic anomalies; Minerals; Mixtures; spin crossover; Temperature effects

(Mg, Fe)CO3 is an important deep carbon carrier and plays a vital role in our understanding of lower‐mantle carbon reservoirs. The electrical conductivity (EC) of FeCO3 was measured at 126−2000 K up to 83 GPa in diamond‐anvil cells using a standard four‐probe van der Pauw method. Moreover, the EC of...