Abstract:

The ages of volcanic rocks from the Fildes Peninsula, King George Island, West Antarctica have been determined with K-Ar, 39Ar-40Ar, Rb-Sr methods by authors. The results show that: a. the age range of the volcanism in the Fildes Peninsula is from Later Paleocene to Early Mid-Miocene; b. the forming time of the volcanic rocks of Jasper Hill Member belonges to Later Paleocene because of the isotope ages being 54Ma and 55Ma determined with Rb-Sr and 39Ar - 40Ar, respectively; c. the volcanic rocks of Agate Beach Member are the products of the volcanic activities during Early Eocene period according to the isochron of K-Ar method (45-50 Ma); d. the geological age for Fossil Hill Member is about from Mid - Eocene to Early Oligocene, and e. the time formed the Block Hill Member lasts Early Mid - Miocene, probabley. These data combining with the geological and palaeozoological evidences have presented strong support for best understanduing the correlation of the stratigraphy and, discussing the volcanism in studied area.