广东河源盆地恐龙蛋化石群及古环境研究

In this project, we will study the morphology and taxonomy of dinosaur eggs from the Heyuan Basin, analyze the diversity of the Heyuan Basin’s dinosaur egg fauna, and compare the dinosaur egg assemblage with other dinosaur egg faunas, which have been relatively well studied. We will carry out detailed surveys of dinosaur egg localities to accurately locate the dinosaur egg horizons, and reveal the distribution of the different dinosaur eggs in the strata. We will analyze dinosaur egg triple oxygen isotope, discusses the paleoenvironment of the Heyuan Basin and habits of different kinds of dinosaurs. A major additional focus will be the analysis of various dinosaur oospecies with the techniques of X-ray Computed Tomography (CT), find out the possible existence of dinosaur embryos in eggs, and analyze technical requirements about the technology in dinosaur egg and eggshell studying. Implementation of this project, we will increase the dinosaur eggs diversity in China and establish the stratigraphic sequence of the Cretaceous strata of the Heyuan Basin, and analyze the paleoenviroment of the Heyuan Basin, and try to establish the relationship between dinosaur and dinosaur eggs.

本项目将通过对河源盆地发现的恐龙蛋进行系统形态学和分类学研究，分析河源恐龙蛋化石群组成及其多样性，与我国研究程度较高的几个恐龙蛋化石群进行对比，分析其在恐龙蛋化石群序列中的位置；对河源盆地进行详细的地层考察，厘定恐龙蛋的准确层位，对河源盆地红层进行划分与对比；分析恐龙蛋三重氧同位素，探讨河源盆地的古环境以及不同类型恐龙的生活习性；采用CT扫描技术对恐龙蛋和蛋壳显微结构进行构建，找寻其中可能存在的恐龙胚胎，建立恐龙蛋与恐龙的直接关系。本项目的实施将进一步丰富恐龙蛋的类型，建立河源盆地晚白垩世红层层序，分析河源盆地的古环境，建立恐龙与恐龙蛋之间的直接关系，探讨不同类型恐龙的生活习性。

通过对河源盆地恐龙蛋的系统研究，明确了河源盆地恐龙蛋类型和多样性组成，综合宏观形态和蛋壳显微结构特征，河源盆地发现的恐龙蛋有长形蛋科、棱柱形蛋科、石笋蛋科、蜂窝蛋科等4个蛋科，长形蛋属、巨形蛋属、棱柱形蛋属、石笋蛋属、副蜂窝蛋属等5个蛋属，不少于12个蛋种。.通过考察河源盆地主要的恐龙蛋产出区域，初步厘定了不同类型恐龙蛋的产出层位和分布，结合恐龙蛋多样性组成对比，河源盆地含恐龙蛋红层可分为两段，下部主要产出于砾岩层中，分布在东江两岸、江东新区、源城区等地，含恐龙蛋数量巨大，大多呈窝产出，主要以蜂窝蛋类、石笋蛋类为主，有少量的长形蛋类，这些类型可以周边区域的广东佛山、惠州、深圳等地含恐龙蛋红层进行对比，恐龙蛋类型组合可以同浙江天台恐龙蛋化石群、江西萍乡恐龙蛋化石群进行对比，时代相当于晚白垩世早－中期；上部含恐龙蛋红层主要为泥质粉砂岩、粉砂质泥岩，粒度较细，分布于东源县境内，主要以长形蛋类、棱柱形蛋类、石笋蛋类为主，同时发现有黄氏河源龙等恐龙骨架，恐龙蛋类型组合可以同广东南雄恐龙蛋化石群、山东莱阳恐龙蛋化石群上部类型等相对比，时代相当于晚白垩世中－晚期。