摘要
讨论了典型Ｈｉｎｄｅｏｄｕｓｐａｒｖｕｓ与非典型Ｈ．ｐａｒｖｕｓ的区别；论证了化石保存完好、丰富、多样对提高作为全球界线层型剖面和层型点（ＧＳＳＰ）的可靠性的重要作用；并强调以ＨｉｎｄｅｏｄｕｓｌａｔｉｄｅｎｔａｔｕｓＨｉｎｄｅｏｄｕｓｐａｒｖｕｓＨ．ｔｕｒｇｉｄｕｓＩｓａｒｃｉｃｅｌａｉｓａｒｃｉｃａ序列的浅水型碳酸盐岩海相连续沉积的地层中，主齿细齿均保存完整的非变质的典型Ｈ．ｐａｒｖｕｓ的首次出现为标志来划分二叠三叠系界线，才有可能精确确定特提斯地区的Ｐ／Ｔ生物学事件地层界线．江西的东岭、沿沟剖面，自长兴组至大冶组均为浅水型碳酸盐岩海相连续沉积，组间界线附近的岩性具有过渡性质，这对探究浅水型牙形动物具有特殊意义．此二剖面的Ｈ．ｐａｒｖｕｓ首次出现的点位与大冶组底界一致，这似乎验证了华南的界线粘土层既是生物学事件的标志。
It was discussed that the difference between the typical and untypical Hindeodus parvus,and the perfection,richment and diversity of their fossils reserved,play an importment and reliable role in the Global Boundary Stratotype Section and Point (GSSP) in this paper.Here,author stressed that it is only possible to exactly determine the P/T biology eventostratigraphic boundary of Tethys Realm by dividing P/T boundary with the first appearance of typical H. parvus as mark which were perfect reserved,unmetamorphosed and which main cusp and denticles were preserved intact at the H. latidentatus H. parvus Isarcicella isarcica phylomorphogenetic lineage within the continuously deposited strata of carbonate rock in shallow water facies. The Dongling and Yangou sections in Jiangxi Province are all continous sediments of carbonate rock of shallow water facies from Changxing Formation to Dayie Formation and lithologic characters across them is transitional which have a special significance to make a thorough inquiry of phylomorphogenetic lineage of shallow water conodont fauna,and to bring to light the P/T bioeventostratigraphic boundary.In this two sections,the point position of the first appearance of H. parvus is in keeping with base of Dayie Formation.It seems showed that the Boundary Clay Bed in South China is not only the bio event,but also the unbio event mark.
出处
《江西师范大学学报（自然科学版）》
CAS
1997年第1期88-95,共8页
Journal of Jiangxi Normal University(Natural Science Edition)
基金
江西省自然科学基金
关键词
地层界线
二叠系
三叠系
牙型动物
化石
typical Hindeodus parvus,P/T bioeventostratigraphic boundary,boundary clay bed,GSSP,dongling of xiushui county,Jiangxi province
