An exploration of the variations of paleointensity during the Quaternary period and their relationship with climatic fluctuations in special reference to the thermomagnetic measurements of volcanic rocks.

Thermomagnetic measurements were conducted on 13 samples of Quaternary volcanic rocks of different episodes from three separate localities by Thellier's method. Paleointensities representing three Quaternary sub-periods have been obtained: 0.62 for early Pleistocene, 1.01 for middle Pleistocene and 1.57 for late Pleistocene as relative to today's magnetic field intensity. The results indicate that geomagnetic field intensity has been increasing since Pleistocene, and there exists a close relationship between the variations of paleointensity and climatic fluctuations, i.e. the climate tends to become colder with increasing paleointensity and it is true for the opposite case. -English summary