豫西南晚白垩世红层时代厘定及其意义

基金项目:

河南省自然科学基础研究青年基金,河南省教委自然科学青年基金

详细信息

The age of the Late Cretaceous red beds in southwestern Henan province

1. Dept．of Geography, Nanyang Teachers School of Henan, Nanyang, 473061, China;
2. No．4 Geological Survey Party, Henan Bureau of Geology and Mineral Exploration and Development, Nanyang, 473056;
3. Institute of A rchaeology and Cultural Relics of Henan Province, Zhengz hou, 450006

摘要: 研究区位于豫、鄂、陕三省相邻地带，在秦岭造山带后造山阶段构造体制转换过程中，形成了李官桥、滔河、西峡、夏馆、五里川、召北等一系列近于平行的断陷盆地，盆地内分别沉积了１０００～４０００ｍ的陆相碎屑沉积。根据恐龙蛋、轮藻、孢粉、介形类及一定数量的恐龙骨骼化石、同位素年龄等，将盆地内红层的时代归属为晚白垩世，并对每一盆地红层进一步作了详细划分。
Abstract: Southwestern Henan province is located in Henan and near its border with Shanxi and Hubei provinces. In this area there are a series of nearly parallel down faulted basins, such as the Liguanqiao, Taohe, Xixia, Xiaguan and Wulichuan basins, which formed in the process of transformation of the tectonic mechanism during the post orogenic stage of the Qinling orogenic belt. Terrigenous clastic red sediments 1 000～4 000 m thick are deposited in the basin. Based on the fossil dinosaur eggs, charophytes, sporo pollen, ostracods and dinosaur skeletons as well as isotopic ages, the age of the red beds in these basins are assigned to Late Cretaceous, and the red beds of each basin are subdivided.
- red beds /
- dinosaur eggs /
- charophytes /
- sporo pollen /
- ostracods /
- Late Cretaceous /
- southwestern Henan