浙江长兴二叠系-三叠系界线层型剖面面临的新问题  

THE PERMIAN-TRIASSIC BOUNDARY GSSP AT MEISHAN,CHANGXING,ZHEJIANG,FACES NEW PROBLEMS

作　　者：王成源[1] 

机构地区：[1]中国科学院南京地质古生物研究所,江苏南京210008

出　　处：《地层学杂志》2008年第2期221-226,共6页Journal of Stratigraphy

摘　　要：长兴煤山P/T界线在27层中间,H.parvus带之上应为I.staeschei带,不是I.isarcica带。H.parvus带厚仅4cm,可能包括H.parvus和I.lobata两个化石带的时间间隔;界线层不仅高度浓缩,而且有硬底构造,缺失一些牙形刺分子,很可能在界线层中有小的沉积间断。The Permian-Triassic boundary GSSP at Meishan, Changxing, is designated within bed 27. Above the H. parvus Zone is the I. staeschei Zone rather than the I. isarcica Zone. The H. parvus Zone is only 4 cm in thickness, and probably represents strata deposited during the H. parvus Zone and the I. lobata Zone. Bed 27 is highly condensed, and contains hardground surfaces at several levels. Thus, some conodont elementss are missing, and it is most likely that some depositional gaps of short time span are present within bed 27.

关 键 词：二叠系-三叠系界线 界线层型剖面及点位 I.staeschei带 H.parvus带 间断 硬度构造 浓缩 煤山 浙江 

分 类 号：P534.46[天文地球—古生物学与地层学] P534.51[天文地球—地质学]