四川师范大学学报（自然科学版）2017，Vol.40Issue(3)：404-410,7.DOI:10.3969/j.issn.1001-8395.2017.03.022
西安黄土台塬区全新世黄土磁化率古气候环境演变
Palaeoclimate Environment Vicissitude of Susceptibility of Loess During the Holocene on the Loess Tableland Region in Xi'an
摘要
Abstract
Doing research about the characteristic of the evolution of environment in Xi'an area during the Holocene,providing a basis for Xi'an area to China and the global in predicting future environment development trends.Loess deposition age sequence during the Holocene in the region is established by the description of rock character of loess-palaeosol stratum,the partition and contrast of stratum of section in Yubaotou village of Xi'an Shenheyuan and Xinzhuang village of Jingyang county,and with the combination of age measuring of AMS 14C in Xinzhuang village of Jingyang county and other scholars' testing data.According to the character of the curve expressed by substitution indication of climate of susceptibility,the changing regularity of this substitution indication in the section,and the strength changing character of winter and summer monsoon in East Asian reflected by the loess section,minutely analysis the characters and laws of environment changing in Xi'an area during the Holocene,then the character of the susceptibility curve of this section is compared with temperature curve of sporopollen spectrum established by other scholars.At the same time,we have been compartmentalized to the palaeoclimate stage trait during the Holocene in Xi'an area,six climate stages nearly 10 000 years in Xi'an area can be suggested and they are:Stage 1,10.0 ～9.0 kaBP,it is a conversion stage,the climate turned from cold and dry to warm and humidity;Stage 2,9.0～7.0 kaBP,the climate of this phase often fluctuated,climate was warm and humidity;Stage 3,7.0 ～ 5.0 kaBP,a warm phase;Stage 4,5.0 ～ 3.4 kaBP,it is a turbulent stage,warm and cold alternated;Stage 5,3.4 ～ 2.0 kaBP,the temperature drooped at first and then arised;Stage 6,2.0 kaBP to present,warm semi-humid and semi-arid stage.关键词
全新世/古气候环境/黄土/磁化率/西安黄土台塬区Key words
Holocene/palaeoclimate environment/loess/susceptibility/Xi'an loess tableland region分类
天文与地球科学引用本文复制引用
李秉成,李正泽..西安黄土台塬区全新世黄土磁化率古气候环境演变[J].四川师范大学学报（自然科学版）,2017,40(3):404-410,7.基金项目
国家自然科学基金(40772181) （40772181）
