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| 浙江天台地区赖家组的划分与分布 | |
| 引用本文： | 方晓思,程政武,蒋严根,杨良锋.浙江天台地区赖家组的划分与分布[J].地质通报,2003,22(1):21-27. |
| 作者姓名： | 方晓思 程政武 蒋严根 杨良锋 |
| 作者单位： | 1. 中国海洋国际勘探公司,北京,100021 2. 石油大学地球科学系,北京,102200 3. 中国矿业大学资源开发系,北京,100083 4. 中国石油天然气勘探开发公司,北京,100011 |
| 基金项目： | 中国石油天然气集团公司(CNPC)资助项目 |
| 摘 要： | 柴达木盆地是中国目前保存较为完整的、连续的、巨厚的河－湖相沉积记录的盆地，通过对ZK701＋801，水6孔，涩中6和涩深1井等典型剖面孢子花粉组合特征和分布规律的研究，详细地论述了第四纪孢粉组合带及其所代表的植被，气候演变进程，自1．87MaB.P.以来共识出了59个孢粉组合带，划分出29个完整的冷暖气候旋回，并且同中国西北第四纪黄土－古土壤系列的37个气候旋回以及深海钻孔氧同位素气候旋回进行了较好的对比。 |
| 关 键 词： | 柴达木盆地 孢粉组合 第四纪 古气候旋回 氧同位素 植被 |
| 文章编号： | 1671-2552(2003)01-0012-04 |
| 修稿时间： | 8/6/2002 12:00:00 AM |
LA-MC-ICPMS zircon U-Pb dating of Wulanwuzhuer porphyritic syenite granite in the Qimantag Mountain of Qinghai and its geological significance |
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| GUO Tong-zhen,LIU Rong,CHEN Fa-bin,BAI Xu-dong,LI Hong-gang.LA-MC-ICPMS zircon U-Pb dating of Wulanwuzhuer porphyritic syenite granite in the Qimantag Mountain of Qinghai and its geological significance[J].Geologcal Bulletin OF China,2003,22(1):21-27. | |
| Authors: | GUO Tong-zhen LIU Rong CHEN Fa-bin BAI Xu-dong LI Hong-gang |
| Institution: | Qinghai Institute of Geological Survey/Qinghai Province Key Laboratory of Geological Processes and Mineral Resources of Northern Qinghai-Tibetan Plateau, Xining 810012, Qinghai,China |
| Abstract: | The Quaternary of the Qaidam basin is a successive and complete a ccumulation of fluvial-lacus-trine sediments with a great thickness.Based on a study of Quaternary sporopollen assemblages and their vertical distribution at typical profiles of holes ZK701+801,Shui 6,Sezhong6and Seshen1, this paper discusses in detail Quaternary assemblage zones and the vegetation an d climatic evolution represented by them.A highly precise sporopollen climate c urve is obtained,which shows that alternation of dry-cold and wet-warm clim ates is the basic model of the Quaternary paleoclimate evolution in the Qaidam basin.Altogether59sporopollen assemblage zones and29complete cold-warm pal eoclimatic cycles since1.87Ma B.P.have been recognized.They can be well correlated with the37paleoclimate cycles derived from Qua-ternary loess and p aleosols in northwestern China and the deep sea oxygen isotope climate records. |
| Keywords: | Qaidam basin sporopollen assemblage Quaternary paleoclimatic cycle |
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