登 录 免费注册 中文|English
网站首页 数据目录 数据检索 数据发布 会员中心 专题服务 关于本站 当前时间为:2017年11月24日
   
 
  客服时间: 8:30-16:30
电话: 029-62336215
Email:yanlibin@ieecas.cn
  信息检索
关键字:
友情链接
威斯康星大学古气候组
美国大气研究中心
中国国气象科学数据网
地环所气候与环境模拟室
美国古气候数据中心
世界数据中心
地球系统科学数据共享平台
黄土与第四纪地质国家重点实验
详细元数据
 
青藏高原东北部柴达木盆地西部粒度数据集(7.3-1.6Ma)(英文数据集)
点击率:159
关 键 词 柴达木盆地,粒度
How sediment grain size corresponds to both climate change and tectonics is increasingly the focus of debate. The shrinkage and migration of the huge paleo-lake in the western Qaidam Basin (WQB), NE Tibetan Plateau (TP) provide an excellent case study. We present a nearly 6 Ma well-dated high-resolution grain size record from the 723-m-deep drill core SG-1b (located in the Jianshan Anticline in the WQB) to show how sediment grain size responds to anticline growth and climate change. The results show that variations in grain size represent three distinct phases. Phase I (7.3-3.6 Ma) is characterized by fine sediments with good sorting, with a predominance of clay and fine silt. During this phase, the drilling site was in a deep to semi-deep lake environment, the Jianshan Anticline has undergone relatively weak tectonics and the climate was dry, but still much wetter than that in the Quaternary; grain size variation and lacustrine deposition were principally controlled by climate. Phase II (~3.6-3.3 Ma) was a transitional period characterized by a rapid shift toward consistently coarser sediments with increased volumes of medium-coarse silt and sand. During this phase, the drilling site underwent a dramatic shift to a shallow lake environment, the anticline experienced rapid uplift and the climate was in an episode of rapid drying; grain size variation and lacustrine deposition were principally controlled by tectonics in the Jianshan Anticline. Phase III (~3.3-1.6 Ma) was a period exhibiting a long-term fining trend in mean grain size relative to Phase II, but still much coarser than that of Phase I, and with a distinct and prolonged increase in very fine sediments accompanied by poor sorting. During this phase, the drilling site was in a shallow lake environment between 3.3 Ma and 1.9 Ma, and finally became a lakeshore-like environment between 1.9 Ma and 1.6 Ma; the anticline experienced rapid and continuous uplift and the climate was in a long-term stepwise drying and cooling trend. A conceptual model was drawn to show how grain size and lacustrine deposition responded to uplift of the Jianshan Anticline and climate change in the Qaidam Basin.
a. Description of Intellectual Property Rights When using a dataset, please refer to the following documents in the article: Yin Lu, Xiaomin Fang, Erwin Appel, et al. A 7.3-1.6 Ma grain size record of interaction between anticline uplift and climate change in the western Qaidam Basin, NE Tibetan Plateau[J]. Sedimentary Geology, 2015, 319: 40-51 b. The data labels refer to the following specifications: In order to respect intellectual property rights and protect the rights and interests of data contributors and service providers, data users are requested to mark the data sources in the research results (including project evaluation reports, acceptance reports, academic papers and graduation thesis) based on this data, and the references cited in the [Citation Reference], and submit the publicly available results to the "National Earth System Science Data Sharing Platform" Data sources refer to the following specifications: Chinese Expression: 国家科技基础条件平台-国家地球系统科学数据共享平台-东亚古环境科学数据库; English Expression: East Asian Paleoenvironmental Science Database, National Earth System Science Data Sharing Infrastructure, National Science & Technology Infrastructure of China Acknowledgments refer to the following specifications: Acknowledgments in Chinese: 感谢国家科技基础条件平台-国家地球系统科学数据共享平台-东亚古环境科学数据库提供数据支撑。 Acknowledgments in English: Acknowledgement for the data support from " National Earth System Science Data Sharing Infrastructure, National Science & Technology Infrastructure of China, East Asian Paleoenvironmental Science Database. " Iegal liability: The platform owns intellectual property rights protected by the law, including copyrights for all the data products or services and relevant information published by the platform itself or contributed by some data contributors. No unit or individual may copy, modify, transcribing, spread or sell any part of the above data products, services, information or materials in any way or reason without the written permission of this platform. Where the infringement of copyright and other intellectual property rights of the platform, the platform will be held accountable according to law, hereby solemnly declare! c. Contacts Name: Data processing group Email: eapsd@ieecas.cn Tel: 029-62336213
Excel
地质纪录 - 陆地环境记录
东亚古环境科学数据库
[下载附件]
 
联系人卡片
姓名: 
赵宏丽 邮箱: zhaohl@ieecas.cn
单位: 中科院地球环境研究所 电话: 029-62336213
相关数据
中新世以来隆中盆地红粘土矿物学及地球化学分析数据集
印度Bittoo洞碳氧同位素数据集(280,000
红原全新世泥炭数据集(11.5 KYr BP至今)
灵台等中国黄土风尘沉积物中石英颗粒的氧同位素组成数
兰州风尘沉积的粒度分布数据集(倒数第二次冰期-末次
汾渭盆地黄土剖面粒度数据集(1.2 Ma以来)
中国中北部黄土-古土壤序列数据集(3.0-2.6
中国黄土沉积中Zr/Rb比值数据集(1.8Myr
中国南部黄土起源的地球化学证据(中更新世以来)(英
粘土矿物及其所指示的风尘对帕里西维拉盆地的输入等组
网站首页 数据目录 数据检索 数据发布 会员中心 专题服务 关于本站
Copyright? 1999-2013 Hunan Province Provincial Finance Department, All rights reserved. 版权所有:东亚古环境科学数据库
联系电话:029-62336215 E-mail:yanlibin@ieecas.cn传真:029-62336215 技术支持:凯天网络
声明:本网站内容未经书面授权不得转载与镜像