| 柴达木盆地东北部中新世沉积物色度记录的气候变化 |
| |
| 引用本文： | 王杰民,闫宝华,吴 松,杨积伟,张 洒,宋春晖.柴达木盆地东北部中新世沉积物色度记录的气候变化[J].甘肃地质学报,2012(1):6-11. |
| |
| 作者姓名： | 王杰民 闫宝华 吴 松 杨积伟 张 洒 宋春晖 |
| |
| 作者单位： | 兰州大学地质科学与矿产资源学院,甘肃兰州730000 |
| |
| 基金项目： | 国家973重点基础研究发展计划项目（2011CB403000、2010CB833401）; 国家自然科学基金项目（40872029、40902015）; 高等学校博士科学点专项科研基金（20090211110021 20090211120028）的资助 |
| |
| 摘 要： | 中新世是新生代古气候变化的关键时期。本文以柴达木盆地东北部瑙格剖面18.4～6.9Ma沉积物为研究对象,通过对沉积物颜色指标的测定与分析,获得该时段沉积物高分辨率颜色指标变化序列。发现色度值变化与氧化—还原作用有关,红度值与赤铁矿相对含量呈正相关。结合其它资料分析表明,柴达木盆地东北部地区中新世气候变化为18.4～14.2Ma相对暖湿阶段、14.2～7.7Ma相对冷湿阶段、7.7～6.9Ma相对干冷阶段,其变化可能受到全球温度变化的影响,气候转型主要导致了该区沉积相和沉积物色度的变化。
|
| 关 键 词： | 气候变化 中新世 柴达木盆地 色度 赤铁矿/针铁矿 |
Climate Changes Recorded by Colors of the Miocene Sediments in Northeast Qaidam Basin |
| |
| WANG Jie-min,YAN Bao-hua,WU Song,YANG Ji-wei,ZHANG Sa,SONG Chun-hui.Climate Changes Recorded by Colors of the Miocene Sediments in Northeast Qaidam Basin[J].Acta Geologica Gansu,2012(1):6-11. |
| |
| Authors: | WANG Jie-min YAN Bao-hua WU Song YANG Ji-wei ZHANG Sa SONG Chun-hui |
| |
| Institution: | (School of Earth Science,Lanzhou University,Lanzhou 730000,China) |
| |
| Abstract: | The Miocene is the key period for studying the Cenozoic climate changes.The sediment of Naoge section located in the northeast Qaidam Basin could record Climate changes from ～18.4 to 6.9Ma.Based on the measurement and the analysis of the color of the sidement,we got the high resolution changes of the color during this period.The change of the color is related to the Oxidation-reduction reactions,the redness and the hematite is positively correlated.The Climate change of this area from 18.4 to 6.9 Ma can be identified the following stages： the warm and humid period（18.4～14.2Ma）,the cold and humid period（14.2～7.7Ma）,the cold and dry period（7.7～6.9Ma）,the global temperature maybe caused this change and the climate transformation leads to the changes of the sedimentary facies and the color values. |
| |
| Keywords: | Climate Change Miocene Qaidam Basin color hematite/gothite |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《甘肃地质学报》浏览原始摘要信息 |
| 点击此处可从《甘肃地质学报》下载免费的PDF全文 |
|
