Data for "Holocene palaeoenvironmental conditions in NE Bulgaria uncovered by mineral magnetic and paleomagnetic records of an alluvial soil"
Description
This data set relates to the article "Holocene palaeoenvironmental conditions in NE Bulgaria uncovered by mineral magnetic and paleomagnetic records of an alluvial soil" by Jordanova, D., Georgieva, B., Jordanova, N., Guyodo, Y., Lagroix, F., Quaternary International, 2022, 631, pp. 47–58 In this study we obtained records of paleomagnetic direction and relative paleointensity of the Earth's magnetic field from an alluvial soil situated on a flood river terrace close to the well-dated and stratigraphically confined Chalcolithic mound near the village of Koprivetz in NE Bulgaria. Anisotropy of magnetic susceptibility data revealed a coherent imbricated magnetic fabric reflecting the effects of water flow in the lower alluvial clays and the direction of delluvial sedimentation from the slope in the upper soil horizons. The data set includes: 1) variations with depth of: NRM, magnetic susceptibility (X), Declination and Inclination of ChRM; 2) variations of AMS (anisotropy of magnetic susceptibility) parameters with depth: volume magnetic susceptibility (Kvolume), L, F, Pj, T, Declination and Inclination of Kmax and Kmin; and E12 and E23; 3) variations with age of: palaeoenvironmental proxy parameters IRM(20mT)/IRM and Xfd/Xarm The ratio of frequency dependent susceptibility to anhysteretic susceptibility (χfd/χARM) is considered as a proxy for paleoprecipitation. The ratio of isothermal remanent magnetization after 20 mT alternating field demagnetization (IRM20mT) normalized to the full IRM showed good consistency with the GISP2 ice record of temperature variations in Greenland during the Holocene.