|
|||||
|
|
| 黄土高原东西部末次间冰期以来黄土显微特征与古气候记录 | |
| 引用本文： | 屈红军,夏斌,雷祥义,岳乐平,李小强.黄土高原东西部末次间冰期以来黄土显微特征与古气候记录[J].海洋地质与第四纪地质,2004,24(2):95-100. |
| 作者姓名： | 屈红军 夏斌 雷祥义 岳乐平 李小强 |
| 作者单位： | 1. 中国科学院,广州地球化学研究所,广州,510640;西北大学,大陆动力学教育部重点实验室,西安,710069 2. 中国科学院,广州地球化学研究所,广州,510640 3. 西北大学,大陆动力学教育部重点实验室,西安,710069 4. 中国科学院,地球环境研究所,西安,710075 |
| 基金项目： | 国家自然科学基金资助项目(40372077) |
| 摘 要： | 以西安刘家坡和甘肃会宁西雁山末次间冰期以来黄土剖面为例，通过剖面土壤结构特征、骨架颗粒矿物成分、主要碎屑颗粒形态、骨架颗粒接触关系以及孔隙特征的分析对比，研究了黄土高原东西部黄土显微特征，进而探讨了其古气候意义。研究进一步证明，古土壤形成期气候比黄土形成期气候湿热，黄土剖面中黄土与古土壤交替反映了干与湿、热与冷的古气候变换；在古土壤形成期气候较湿热的总趋势下，黄土高原东南部比西北部更为湿热，在黄土形成期气候较干冷的总趋势下，黄土高原西北部比东南部更为干冷，这与现今黄土高原的区域性气候差异一致。 |
| 关 键 词： | 末次间冰期 黄土剖面 显微特征 古气候 黄土高原 |
| 文章编号： | 0256-1492(2004)02-0095-06 |
RECORD OF PALEOCLIMATE AND MICROSTRUCTURE OF LOESS SINCE THE LAST INTERGLACIAL BETWEEN THE EAST AND WEST OF THE LOESS PLATEAU |
|
| QU Hong-jun.RECORD OF PALEOCLIMATE AND MICROSTRUCTURE OF LOESS SINCE THE LAST INTERGLACIAL BETWEEN THE EAST AND WEST OF THE LOESS PLATEAU[J].Marine Geology & Quaternary Geology,2004,24(2):95-100. | |
| Authors: | QU Hong-jun |
| Institution: | QU Hong-jun~ |
| Abstract: | Taking the loess section since the last interglacial of Huining, Gansu and Xi'an as two examples and by means of the analyses and correlations of section structure characteristics, mineral composition of principal grains, shapes of main detrital grains, compact relations of principal grains and the pore features, the changing characteristics of microstructure properties since the last interglacial in the Loess Plateau are studied. In addition, the paleoclimate trend in different regions in different ages since the last interglacial in the Loess Plateau are also discussed. It shows that paleosol was formed in warmer and more humid paleoclimate compared with loess; the alternate deposits of loess and paleosol revail the alternate dry and humid, warm and cool paleoclimate. It also makes clear that loess is different in different regions since the last interglacial. Showed by paleosol formed in warm and humid paleoclimate, it was warmer and more humid in the southeast of the Loess Plateau than in the northwest. Showed by loess formed in dry and cool paleoclimate, it was drier and cooler in the northwest of the Loess Plateau than in the southeast. That is the same as the climate of the Loess Plateau at present. |
| Keywords: | loess paleosol microstructure properties paleoclimate the last interglacial Loess Plateau |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |