新疆吐哈盆地侏罗纪湖相动物遗迹化石的发现及古环境意义

对首次在吐哈盆地台北凹陷侏罗系发现的分布于不同剖面、不同层位中的动物遗迹化石进行了系统研究。主要分析了研究区内动物遗迹化石的特征 ,将之划分为六大类型 :( 1 )垂直居住迹 ;( 2 )垂直觅食迹 ;( 3 )“U”形管 ;( 4)潜穴系统 ;( 5)逃逸迹 ;( 6)停息迹。较详细地分析了各类型的形态特征和保存特点 ,简要分析了造迹生物的行为习性及环境意义。在此基础上 ,建立了本区动物遗迹化石的环境模式。同时指出 ,遗迹化石在陆相含油气盆地确实大量存在 ,并在储层研究中具广泛的实践意义。

Discovery of Jurassic lacustrine trace fossils and their paleoenvironmental significance from Turpan-Hami Basin,Xinjiang

On the basis of trace fossils in paleoenvironmental interpretation, this paper systematically studies the abundant, various trace fossils firstly discovered from the Middle Jurassic in the Taibei depression, Turpan Hami Basin, Xinjiang, China. According to their morphologies, these trace fossils could be divided into 6 types: (1) vertical dwelling; (2) vertical fooding; (3) “U” shaped tubes; (4) burrow systems; (5) escape traces and (6) resting traces. After analyzing their morphological and preserved characters, as well as dealing with the ethological and environmental significance of trace makers, the paleoenvironmental model of animal trace fossils is set up for this study area. Meanwhile, the authors point out that there are a lot of trace fossils in the continental hydrocarbon bearing basins, these fossils have a practical significance in reservoir research. Trace fossils can provide independent evidence not only in depositionally environmental interpretation, but also in reconstruction of basin development history.