Stable isotopic studies of dinosaur eggshells from the Nanxiong Basin, South China |
| |
| Authors: | ZHAO Zikui YAN Zheng |
| |
| Institution: | 1. Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China
2. Institute of Geology,State Seismological Bureau,Beijing 100029,China |
| |
| Abstract: | Stable carbon and oxygen isotopes have been observed in dinosaur eggshell samples, identified asMacroolithus yaotunensis, collected in two sections of the Nanxiong Basin, Guangdong Province, South China. Multiple positive δ18O perturbations that occurred during the K/T transition of about 150 ka suggest that there may have been at least three periods
of the extreme dry climate with a mean annual air temperature over 27δC. δ13C ranges from -8.37% to -11.60% of the dinosaur eggshells, added to the metabolic enrichment of 16%, may indicate that the
dinosaurs represented by this type of eggshells probably consumed the plant species of C3 type with the δ13C values of -24.3%— -27.6‰ Moreover, the trend toward more negative δ13C values of the eggshells during the K/T transition could be an indirect consequence of a lasting increase in atmospheric
CO2 concentration. |
| |
| Keywords: | K/T boundary dinosaur eggshell isotopic composition paleoenvironment |
| 本文献已被 万方数据 SpringerLink 等数据库收录！ |
|
