Petrological　characteristics　of　the　sedimentary　volcaniclastic　rocks　of　the　Fossil　Hill　Formation　（eocene）　in　King　George　Island，　West　Antarctica  

作　　者：薛耀松 沈炎彬 卓二军 

出　　处：《Chinese Journal of Polar Science》1996年第2期99-117,共19页极地研究（英文版）

摘　　要：The Fossil Hill Formation of the type section composed chiefly of the sedimentary-volcaniclastic breccia and tuffites can be divided into two cycles of sedimentation. The thermal fluid was active in the coarse volcaniclastic deposits of the lower cy-cle, it led to the formation of laumontite,analcite,albite and regularly hybrid mineral of interlayered chlorite and montmorillonite .which are absent from the upper cycle, and to the transportation and concentration of some of trace elements between the coarser tuffites and the overlying fine tuffite bed at the upper part of this cycle. So-called 'rainprint' and 'mud crack' actually are non-sedimentary originally, they were formed respectively by sheddillg of the small zeolitized concretions on the bedding plane and tectonic pressed stress. The evidences indicate that the Fossil Hill Formation of the Fossil Hill section was deposited in an intermontane lake affected by both volcanic action andseasonal flail under the condition of worm and moist climate.The Fossil Hill Formation of the type section composed chiefly of the sedimentary-volcaniclastic breccia and tuffites can be divided into two cycles of sedimentation. The thermal fluid was active in the coarse volcaniclastic deposits of the lower cy-cle, it led to the formation of laumontite,analcite,albite and regularly hybrid mineral of interlayered chlorite and montmorillonite .which are absent from the upper cycle, and to the transportation and concentration of some of trace elements between the coarser tuffites and the overlying fine tuffite bed at the upper part of this cycle. So-called 'rainprint' and 'mud crack' actually are non-sedimentary originally, they were formed respectively by sheddillg of the small zeolitized concretions on the bedding plane and tectonic pressed stress. The evidences indicate that the Fossil Hill Formation of the Fossil Hill section was deposited in an intermontane lake affected by both volcanic action andseasonal flail under the condition of worm and moist climate.

关 键 词：ANTARCTICA King George Island Fossil Hill Formation sedimentary volcaniclastic rocks. 

分 类 号：P317.3[天文地球—固体地球物理学]