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ISOTOPIC AGE AND STRATIGRAPHYCAL CORRELATION OF VOLCANIC ROCKS IN FINDES PENINSULA, KING GEORGE ISLAND

【标题】ISOTOPIC AGE AND STRATIGRAPHYCAL CORRELATION OF VOLCANIC ROCKS IN FINDES PENINSULA, KING GEORGE ISLAND

【Title】ISOTOPIC AGE AND STRATIGRAPHYCAL CORRELATION OF VOLCANIC ROCKS IN FINDES PENINSULA, KING GEORGE ISLAND

【作者】 E Molan; Zheng Xiangshen; 朱铭; 刘小汉

【Author】 Zhu Ming ; Liu Xiaohan

【期刊】极地研究

【Journal】

【期刊年份】1992

【卷】3

【期】

【关键词】 Fildes Peninsula; isotopic age; stratigraphical correlation

【Keywords】 Fildes Peninsula; isotopic age; stratigraphical correlation

【摘要】The ages of volcanic rocks from the Fildes Peninsula of King George Island, West Antarctica, have been determined with K-Ar, ~(39)Ar-~(40)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 ~(39)Ar-~(40)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. These data combining with the geological adn palaeontological evidences strongly support to best understand the stratigraphical correlation adn reveal the volcanism in studied area.

【Abstract】The ages of volcanic rocks from the Fildes Peninsula of King George Island, West Antarctica, have been determined with K-Ar, 39 Ar -40Ar, 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 39 Ar -40Ar 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. These data combining with the geological adn palaeontological evidences strongly support to best understand the stratigraphical correlation adn reveal the volcanism in studied area.

【基金/项目】

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