Isotopic Age and Stratigraphical Correlation of Volcanic Rocks in Findes Peninsula, King George Island

• Main Authors: Ming, Zhu, Molan, E, Xiaohan, Liu, Xiangshen, Zheng
• Format: Article in Journal/Newspaper
• Language: English
• Published: Polar Research Institute of China - PRIC 1992
• Subjects: Fildes; Fildes peninsula; Fossil Hill; King George Island; West Antarctica; Advances in Polar Science; Antarc*; Antarctica; Polar Science
• Online Access: http://library.arcticportal.org/2046/; http://library.arcticportal.org/2046/1/A199201007.pdf

The ages of volcanic rocks from the Fildes Peninsula of King George Island, West Antarctica, have been determined with K - Ar, Ar - Ar, Rb - Sr methods by the authors. The results show that: a. The volcanism on the Fildes Peninsula has been from later Paleocene to early Middle Miocene. b. The formation time of the volcanic rocks of Jasper Hill Member belongs to later Paleocene becarse of the isotope age being 54Ma and 55Ma determined with Rb - Sr and Ar - Ar methods, respectively. c. The volcanic rocks of Agate Beach Member are the products of the volcanic activities during Early Eocene according to K - Ar isochron (45 - 50Ma). d. The geological age of fossil Hill member is about Middle Eocene to Early Oligocene. e. the formation time of Block Hill member is probably early Middle Miocene. The data combining with the geological and palaeontological evidences strongly support to best understand the stratigraphical correlation and reveal the volcanism in studied area.