The variation of geomagnetic field intensity in Central Anatolia during the Neogene-Quaternary period

SUMMARY A detailed palaeointensity study was performed using the modified Thellier method on 18 Quaternary and Neogene volcanic units, ages ranging from 0.08 to 5.98 Ma, in Central Anatolia, Turkey. Robust data, which were estimated 12 lava units area, significantly increase database of palaeomagnetic directions absolute for Anatolian region covering time window back ∼6 Ma. Previous studies sensitively dated samples, except one site this study. The (VDM) value upper Miocene as 48.6 ± 9.2 μT (10.1 × 1022 1.9 Am2) fits well into VDM range data archives. For Pliocene samples with an age 4.7 calculated be 21.0 μT. these inclination +42.9° determined, together results low normal polarity, corresponds Nunivak or Sidufjall subchrons. These are polarity chrons within Gilbert Chron predominantly has reversed polarity. Palaeodirectional field strength between 2.57 Ma clearly showed Brunhes Matuyama Chrons Pleistocene. Three new 25.0 7.9 (age 1.84 Ma), 59.7 8.2 2.15 Ma) 79.6 19.3 early Pleistocene period contribute global archives, lack similar latitude range. average values nine sites 51.5 16.4 (10.3 3.7 Am2). According comparison our database, model record previous Pleistocene, high obtained located Northern Hemisphere, could have occurred due asymmetry Southern Hemispheres during