中国海相泥盆纪遗迹组构及其与沉积层序的关系

在中国新疆和华南海相泥盆系中识别出交切、并列、叠覆遗迹组构（相关遗迹组构类）和欧氏、拓扑遗迹组构（本体遗迹组构类）．通过对火山碎屑风暴岩中复合交切遗迹组构的研究发现，共生组合在一起的遗迹化石，可划分出６个遗迹阶层，具有不同的先后、世代关系和指相意义．拓扑遗迹组构分析表明，庞大的雕画迹家族可归并为３个拓扑类，它们分别同胚于线、树、网．雕画迹从线至网的拓扑形态谱系结构，分别代表深水或缺氧环境中，造迹生物寻觅式、探索式和诱捕式的觅食行为．研究表明：遗迹组构分析对副层序、凝缩段、不同海平面变化速度形成的海进体系域和高水位体系域的识别和高频旋回的研究有重要作用

MARINE DEVONIAN ICHNOFABRICS OF CHINA AND THEIR RELATIONS TO SEDIMENTARY SEQUENCES

Crosscutting, juxtaposition and superimposed ichnofabrics (referred to as interrelated ichnofabrics) and Euelidean, topologic ichnofabrics (referred to as self ichnofabrics) have been recognized in the marine Devonian of Xinjiang and South China. The Upper Devonian composite crosscutting ichnofabric of the pyroclastic tempestites in the west Junggar can be subdivided into six ichnotiers, representing different formation sequences, generator relationships and showing different indicative facies significance. Analyses of the topologic ichnofabrics show that many trace fossils to be classified as graphoglypt can be grouped into three topologic types, homeomorphic to line, tree and networks respectively. The morphologic spectrum structures of graphoglypt from lines to tree to networks may indicate trace maker's foraging, probing and trapping behaviour to obtain food in deep waters and oxygen poor sedimentary enviromnents respectively. Our data show that ichnofabric analysis is important for the recognition of parasequence, condensed section, the transgressive system tracts and highstand system tracts formed by sea level changes in different velocities and for the study of high frequent sedimentary cycles.