Changes in paleo-erosion rates, and interactions between erosion, deposition and deformation in the Issyk Kul basin, Kyrgyzstan
吉尔吉斯斯坦伊塞克湖盆地古侵蚀速率的变化以及侵蚀、沉积和变形之间的相互作用
基本信息
- 批准号:273969534
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2015
- 资助国家:德国
- 起止时间:2014-12-31 至 2021-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Issyk Kul (literally 'Hot Lake') is a large, presently internally-drained lake in the heart of Central Asia. The structural position between mountain ranges belonging to the Kyrgyz Tien Shan, the Terskey Alatau (up to 5216 m) on the south and the Kungey and Zaili Alatau (up to 4973 m) on the north, explains the abundant accommodation space which has lead to the accumulation of ca. 4 km of strata during the late Cenozoic. The combination of glaciated ranges exceeding 4000m, a deep, presently underfilled basin hosting an ~670m deep lake, geodetic GPS-derived shortening rates of 5 mm/yr between the northern and southern ranges, and active deformation which has propagated into the basin during the past several Ma make this is an ideal location to study relationships between the strong erosional, depositional and tectonic signals in Central Asia. At the same time its position in the path of Westerly moisture transport, outside the monsoon influence, makes Issyk Kul an important target for climatic research. Indeed, the 2011 ICDP Workshop held in Kyrgyzstan noted that deciphering the timing and mechanism of formation of the Issyk Kul basin is important for understanding the evolution of Lake Issyk. This proposal focuses on quantifying how erosion rates have changed over time. Our goals are as follows: (1) Determine depositional ages and paleo-erosion and sediment accumulation rates using cosmogenic nuclide and paleomagnetic methods on stratigraphic sections. (2) Reconstruct paleo-precipitation and -vegetation patterns using stable isotopic analyses from dated stratigraphic sequences. (3) Compile existing well logs from the Issyk Kul basin to quantify basin subsidence as a proxy for the tectonic record of the region. With this combined database, we will be able to address changes in erosion rates over time, the evolution of the lake basin over the million year time scale, and examine interactions between the forces responsible for erosion, deposition, and the migration of deformation within the basin.
伊塞克湖(Issyk Kul,字面意思是“热湖”)是一个位于中亚中心的大型内部排水湖。吉尔吉斯斯坦天山山脉、南部的Terskey Alatau山脉(海拔5216米)和北部的Kungey和Zaili Alatau山脉(海拔4973米)之间的构造位置,解释了丰富的可容纳空间,导致了钙的积累。4公里的地层在晚新生代。冰川范围超过4000米,深,目前欠填充的盆地托管一个~ 670米深的湖泊,大地测量GPS推导的缩短率为5毫米/年之间的北方和南方的范围,并积极变形,已传播到盆地在过去的几个Ma的组合,使这是一个理想的位置,研究强侵蚀,沉积和构造信号之间的关系在中亚。与此同时,它在西风带水汽输送路径上的位置,不受季风影响,使伊塞克湖成为气候研究的重要目标。事实上,2011年在吉尔吉斯斯坦举行的综合社区发展项目讲习班指出,破译伊塞克湖盆地形成的时间和机制对于了解伊塞克湖的演变非常重要。 这项建议的重点是量化侵蚀率如何随时间变化。我们的目标如下:(1)在地层剖面上用宇宙成因核素和古地磁方法确定沉积年龄和古侵蚀及沉积物堆积速率。(2)利用稳定同位素分析从年代地层序列重建古降水和植被模式。(3)汇编Issyk Kul盆地的现有测井记录,以量化盆地沉降,作为该地区构造记录的替代。有了这个组合数据库,我们将能够解决侵蚀速率随时间的变化,湖泊盆地在百万年时间尺度上的演变,并检查负责侵蚀,沉积和盆地内变形迁移的力量之间的相互作用。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Miocene to Early Pleistocene Depositional History and Tectonic Evolution of the Issyk‐Kul Basin, Central Tian Shan
- DOI:10.1029/2020gc009556
- 发表时间:2021-03
- 期刊:
- 影响因子:3.7
- 作者:S. Roud;M. Wack;S. Gilder;A. Kudriavtseva;E. Sobel
- 通讯作者:S. Roud;M. Wack;S. Gilder;A. Kudriavtseva;E. Sobel
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Professor Dr. Stuart Alan Gilder其他文献
Professor Dr. Stuart Alan Gilder的其他文献
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{{ truncateString('Professor Dr. Stuart Alan Gilder', 18)}}的其他基金
Magnetic properties and microfabrics of shocked minerals and their influence on the magnetic anomalies in the Ries, Vredefort and Manicouagan impact structures
冲击矿物的磁特性和微结构及其对 Ries、Vredefort 和 Manicouagan 冲击构造磁异常的影响
- 批准号:
433311356 - 财政年份:2019
- 资助金额:
-- - 项目类别:
Research Grants
The Neoproterozoic geomagnetic field: New insights from a high-resolution paleomagnetic study in South China
新元古代地磁场:华南高分辨率古地磁研究的新见解
- 批准号:
413587100 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Research Grants
Distinguishing detrital versus chemical remanent magnetization in sediments: Toward a better understanding of relative paleointensity records
区分沉积物中的碎屑与化学剩磁:更好地理解相对古强度记录
- 批准号:
389869201 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Research Grants
Do meteorite impacts the geomagnetic field and can meteorites retain the record of planetary magnetic fields?
陨石是否会影响地磁场?陨石能否保留行星磁场的记录?
- 批准号:
169945988 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Priority Programmes
How pressure influences the magnetic properties of titanomagnetite and iron with implications for magnetic anomalies and core fields
压力如何影响钛磁铁矿和铁的磁性,并对磁异常和核心场产生影响
- 批准号:
170001569 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Priority Programmes
Understanding magnetic remanence acquisition in sediments through a combined experimental and numerical approach
通过实验和数值相结合的方法了解沉积物中剩磁的采集
- 批准号:
98959802 - 财政年份:2009
- 资助金额:
-- - 项目类别:
Research Grants
Toward a better understanding of the Cretaceous geomagnetic polarity superchron via paleosecular variation studies at the Earth's equator
通过地球赤道的古世变研究更好地了解白垩纪地磁极性超纪元
- 批准号:
58141235 - 财政年份:2008
- 资助金额:
-- - 项目类别:
Research Grants
To understand how continental sediments acquire their magnetic records through automized remanence anisotropy experiments
了解大陆沉积物如何通过自动剩磁各向异性实验获取磁记录
- 批准号:
49045840 - 财政年份:2007
- 资助金额:
-- - 项目类别:
Research Grants
DECIPHERING THE ORIGIN OF MAGNETITE IN HUMAN BRAIN TISSUE
破译人类脑组织中磁铁矿的起源
- 批准号:
470880236 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
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