四川古蔺地区下侏罗统自流井组恐龙足迹简报

<正>四川盆地红层的恐龙足迹有着悠久的发现历史,承载着中国恐龙足迹已描述的大多数属种1]。其中典型的恐龙足迹化石点包括四川资中2]、岳池3]、峨眉4]、重庆南岸2]、大足2]、綦江5]等。最近,笔者在四川盆地南缘的贵州赤水地区也新鉴定了一批恐龙足迹(另文发表)。这些恐龙的地质年代从中侏罗世一直延伸到晚白垩世早期。

Report on dinosaur trackways from Lower Jurassic Ziliujing Formation of Gulin area, Sichuan, China.

The authors discusses the merits and shortcomings of two means of Delphi value-assigning, and analyzed the principles and procedures of Delphi. In the national mineral resources potential assessment project, experts are invited to assess overall iron and aluminum resource in China province by province. This is the first time that Delphi method was applied in mineral assessment around China. During the execution, three probability values was given: 90%, 50%, 10%, and the experts gave their opinion, then by means of relative software, data will be verified, adjusted, reverified. Resources within three depth range can thus be obtained: within 500 meters, within 1000 meters, and within 2000 meters (not for bauxite). The result of the assessment is regarded to be reasonable and effective, the future of China minerals iron and aluminum is good.