西南极乔治王岛白垩纪末-中新世火山-沉积地层研究新进展

Recent Progress of Late Cretaceous—Miocene Volcanic-sedimentary Strata on King George Island,West Antarctic

乔治王岛出露一套白垩纪末—中新世的火山-沉积地层,露头主要分布于菲尔德斯半岛、韦弗半岛、巴顿半岛、波特半岛、华沙地块、克拉克夫地块以及梅尔维尔角等地,地层出露比较完整,对研究南极半岛在白垩纪末—中新世时的地质及古气候演化等科学问题具有非常重要的意义。本文总结了前人对乔治王岛白垩纪末—中新世火山-沉积地层的同位素年代学、地层学以及元素地球化学等方面的研究进展,展示了笔者等的最新研究成果与认识,指出了存在的问题与研究方向。

King George Island comprises Late Cretaceous-Miocene volcanic-sedimentary strata. The outcrops are well exposed in the Fildes Peninsula,Weaver Peninsula,Barton Peninsula,Potter Peninsula,Warszawa Block,Krakow Block and Cape Melville,and quite important for the research of geology and paleoclimate evolution for the Antarctic Peninsula.In this article,we make a summary of the progress for the isotope geochronology,stratigraphy and geochemistry of the Late Cretaceous-Miocene volcanic-sedimentary strata and show our latest research achievements and understandings,as well as propose the current problems and potential suggestions for future research.