Sixteen rhyolitic and dacitic Cretaceous and Paleocene‐Eocene lavas from the Lesser Caucasus have been subjected to paleomagnetic and multimethod paleointensity experiments to analyze the variations of the Earth's magnetic field. Paleointensity experiments were performed with two methods. Thellier‐type experiments with the IZZI method on 65 specimens (nine flows) yielded 15 successful determinations and experiments with the multispecimen method on 14 samples (seven flows) yielded two successful determinations. The joint analysis of the results obtained with both methods produced a mean F_uK = (19.9 ± 3.7) µT for upper Cretaceous and F_Pg = (20.7 ± 3.3) µT for Paleogene sites. Low virtual axial dipole moments for the Cretaceous (3.4 × 10²² Am²) and Paleogene (3.5 × 10²² Am²) samples support the idea of a lower average dipole moment during periods of stable polarity of the Earth magnetic field. Mean flow paleomagnetic directions did not match expected upper Cretaceous to Paleogene directions calculated from the European Apparent Polar Wander Path. While inclination results roughly agreed with expected values, a group of sites showed nearly North‐South paleodeclinations (D = 1.1° ± 14.2°), and another group displayed eastward deviated paleodeclinations (D = 72.9° ± 26.6°). These results suggest the occurrence of nearly vertical‐axis rotations, probably as a result of continental collision since Oligocene. In addition to paleomagnetic and palaeointensity analyses, new K‐Ar absolute age determinations have been performed on three of the studied sites, yielding Late Cretaceous ages (78.7 ± 1.7, 79.7 ± 1.6, and 83.4 ± 1.8 Ma (2σ)).

中文翻译：

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小高加索地区白垩纪和古近纪熔岩的古地磁，多方法古强度和辐射综合研究：地磁和构造意义

小高加索地区的十六个流变和大晶质的白垩纪和古新世-始新世熔岩经历了古磁场和多方法古强度实验，以分析地球磁场的变化。古强度实验用两种方法进行。使用IZZI方法对65个样本（9个流量）进行的塞勒式实验成功进行了15次测定，对14个样品（7个流量）进行的多样本方法进行了两次成功测定。对这两种方法获得的结果进行联合分析，得出 上白垩统的平均F _uK =（19.9±3.7  ）µT，古近纪部位的F _Pg =（20.7±3.3）µT。白垩纪的低虚拟轴向偶极矩（3.4×10 ²² Am ²）和古近纪（3.5×10 ²²  Am ²）样本支持在地球磁场稳定极性期间降低平均偶极矩的想法。平均流量古磁方向与欧洲视极漂移路径计算的上白垩统到古近纪方向不一致。虽然倾斜结果与预期值大致相符，但一组地点显示了近北-南古纬度（D  = 1.1°±14.2°），另一组地点显示了东偏古正角（D = 72.9°±26.6°）。这些结果表明发生了近垂直轴旋转，这可能是由于渐新世以来发生的大陆碰撞。除了古磁和古强度分析外，还对三个研究地点进行了新的K-Ar绝对年龄确定，得出白垩纪晚期年龄（78.7±1.7、79.7±1.6和83.4±1.8 Ma（2σ））。