The Studies On The Vertebrates And Paleoenvironment In Jinsha Site, Chengdu

In February 2001, the discovery of Chengdu Jinsha site shocked everywhere. It is one of the most significant archaeology discoveries follow the Guanghan Sanxingdui in Sichuan.The excavating of Jinsha site will not only rewrite the Chengdu history and the Sichuan ancient history, but also have the extremely vital significance to study the ancient Sichuan history culture.Through the ancient fauna studies, which are extremely sensitive about climate change, we can analysis ancient times climate change rule. Through the Palynological analyse, we can recovers the ancient times vegetation and the ancient times climate change situation. Others that related the ancient times climatic change, For instance ancient-river hydrodynamic force condition and so on, also are the important contents that we understand the ancient times environmental variation rule.Through studies, we obtain the conclusions:1. The vertebrate discovered in Jinsha, besides rhinoceros, others all are our country modern animals. Vertebrate composition, preserved characteristic and its reflection natural condition indirectly have reflected at people's living condition at that time. Chengdu in Jinsha acient time, which forest was widespread, wild animal were luxuriant. The people mainly are engaged in the agriculture, breeding and hunting.2. Through the 14C research of Jinsha site, obtains the Jinsha site age is 2930 ?0 year -2265 year +85year away from today.3. We obtain the Chengdu area plain vegetation that occupies the superiority by the herbaceous plants through the Palynological analyses. The local area is the low-lying wetland. It was growing the massive ferns that like wet environment and the trees on a higher knoll and the mountainous region. The climate belongs to the tropics and the subtropics warm humid climate. It has the phenomenon that the warm - moist and the warm -arid climate changed alternately.4. Through the study about lanthanon and trace element, we can obtain the Guanghan claypan formation that has the homologous ingredient characteristic. The element content on the section plane, middle and lower part assumes the regular change The element, Th, U, Ta, Hf, Rb, Zn, As, K, Na, Sr, are changed by the source area mattered composition and the environment of deposition affects together. The element geochemistry behavior of Guanghan claypan indicated that it has the dry change tendency in the environment. So the ancient environment of Jinsha site is day by day arid.5. Through the send granularity test of an ancient riverway in Jinsha site, we obtain the ancient river is a snaking stream that can reflect a drouthy environment.