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- W4322004852 abstract "Speleothems are potential candidates for paleomagnetic and paleoclimatic reconstructions. Recent studies suggest that the abundance of magnetic minerals trapped in the calcite laminae of stalagmites is controlled by paleoclimatic and paleoenvironmental parameters including precipitation, vegetation and soil erosion. Here we test this hypothesis by studying speleothems from the Cerâmica cave in Penela, Portugal. We conducted carbon and oxygen isotopic analysis, together with the measurement of concentration-dependent magnetic proxies, including natural remanent magnetization, anhysteretic remanent magnetization, isothermal remanent magnetization and mass specific magnetic susceptibility. Results show a moderate but significant correlation between carbon and oxygen isotopic composition and the content in magnetite. An increase in magnetite content is correlated to increased precipitation and increased contribution of organic material. These results corroborate previous observations that rock magnetic properties of speleothems can provide useful information for paleoclimate reconstructions. Acknowledgments: this work was funded by the Foundation of Sciences and Technology of Portugal (refs. PTDC/CTA-GEO/0125/2021; MIT-EXPL/ACC/0023/2021) and IDL (ref. FCT/UIDB/50019/2020).    " @default.
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- W4322004852 date "2023-05-15" @default.
- W4322004852 modified "2023-09-29" @default.
- W4322004852 title "Paleoprecipitations recorded by rock magnetic properties of stalagmites from the Gruta da Ceramica, Portugal" @default.
- W4322004852 doi "https://doi.org/10.5194/egusphere-egu23-9558" @default.
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