河南省汝阳巨型蜥脚类恐龙动物群及含化石地层时代讨论  

The Ruyang Gigantic Sauropod Dinosaurian Fauna from Henan Province and Discussion on Geological Time of the Fossil-bearing Strata

作　　者：徐莉 张兴辽 吕君昌[2] 贾松海 潘泽成 秦爽 朱红卫[3] 曾光艳[3] 

机构地区：[1]河南省地质博物馆,郑州450016 [2]中国地质科学院地质研究所,北京100037 [3]中国石油化工集团公司河南油田石油勘探开发研究院,河南南阳473132

出　　处：《地质论评》2010年第6期761-768,共8页Geological Review

基　　金：河南省国土资源厅两权价款项目"河南省古脊椎动物勘查发掘";"豫西南中生代盆地沉积演化研究"项目;国家自然科学基金资助项目(编号40872017)的成果

摘　　要：在河南省汝阳盆地原划分的古近系始新统"蟒川组"中新发现了大量的恐龙化石。这个动物群主要以植食性的巨型、大型蜥脚类恐龙为主,兼有鸭嘴龙类及肉食性小型兽脚类、大型肉食龙类为辅的恐龙动物群,经初步研究确认至少有10种以上新属种恐龙,还有大量的恐龙蛋壳、龟鳖类、双壳类、植物类等丰富的动植物化石,被称为"汝阳巨型蜥脚类恐龙动物群"。该动物群代表了我国早白垩世晚期至晚白垩早期的恐龙动物群,其分异程度也比以前想象的高得多。而轮藻、介形虫和孢粉等微体化石组合特征、地层叠合关系和区域对比等综合分析,更多显示了汝阳盆地赋存恐龙化石的地层时代为早白垩世中晚期的特征。无疑,汝阳盆地原划分为始新世的"陈宅沟组"、"蟒川组"应为白垩纪,至于是早白垩世中晚期或是晚白垩世早期,还需要更多的证据才能确定。Recently,lots of dinosaurs found from the originally named Paleogene ＂Mangchuan Formation＂ of the Ruyang Basin of Henan Province form a distinct dinosaurian fauna. It is dominated by plant-eating gigantic to large-sized sauropods, accompanying with small theropods, and hadrosaurids. The preliminary study indicates that at least 10 kinds of new dinosaurs and lots of dinosaur egg fragments, turtles, bivalves and fossil plants have been discovered.It was called the Ruyang Gigantic Sauropod Dinosaurian Fauna by L et al.. It represents a new late Early Cretaceous to early Late Cretaceous dinosaurian fauna from China. The diversity of sauropods is much higher than the previously thought. Based on microfossil assemblage features, such as charophyta, ostracods and spores and pollens, stratum characters and regional correlation, the geological age of the dinosaur-bearing ＂Mangchuan Formation＂ from the Ruyang Basin is regarded to belong to mid—late Early Cretaceous. Undoubtedly, the originally assigned Eocene ＂Chenzhaigou Formation＂ and ＂Mangchuan Formations＂ of the Ruyang Basin should be long to Cretaceous, however, this still needs evidence to decide whether it belongs to mid—late Early Cretaceous or early Late Cretaceous.

关 键 词：汝阳 巨型蜥脚类恐龙 动物群 白垩纪 

分 类 号：Q915[天文地球—古生物学与地层学]