Collaborative Research: High-Resolution Calibration of the Maastrichtian to Paleocene of the Western U.S.: Integration of Geochronology, Magnetostratigraphy and Paleontology
合作研究:美国西部马斯特里赫特阶到古新世的高分辨率校准:地质年代学、磁力地层学和古生物学的整合
基本信息
- 批准号:0642291
- 负责人:
- 金额:$ 10.02万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2007
- 资助国家:美国
- 起止时间:2007-05-01 至 2010-04-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Between 70 and 55 million years ago (latest Cretaceous & Paleocene), the earth had a greenhouse climate and underwent massive changes that included a drop in sea level, massive eruptions of flood basalt (Deccan Traps), the extinction of the dinosaurs (K-T boundary), the Laramide orogeny, the explosive radiation of mammals, and a major episode of rapid global warming known as the Paleocene-Eocene Thermal Maximum (PETM). The paleoclimatic record of this time provides an invaluable context for understanding the mechanisms for establishing, maintaining, and escape from greenhouse climates, the relationships between marine and terrestrial environments, and aspects of current and future climate change. The goal of this research is to develop a high-resolution temporal framework for this critical 15-million-year interval based on a series of terrestrial rock sequences from several basins in the Rocky Mountain Region. Cretaceous and Paleocene rocks of the Rocky Mountain region contain a rich record of climatic fluctuations, the best and most sampled terrestrial biotic record in the world (especially fossil plants and mammals), and extensive exposures suitable for magnetostratigraphy and geochronology. Our approach will integrate biostratigraphy (documenting the stratigraphic succession of fossil organisms), magnetostratigraphy (measuring reversals in the earth's magnetic field), and geochronology (dating interlayered volcanic ash beds using the radioactive decay of uranium to lead in zircon crystals). In several cases, we will directly date the boundaries of magnetic polarity reversals. Together, these techniques will allow us to evaluate whether sedimentary cycles preserved in marine and lacustrine sedimentary rocks are controlled by earth's orbital dynamics and interactions with the other planets in the solar system. Though much discussed, this test has never been performed for rocks of this age. The project will result in very high-resolution enhancement of the geologic time scale that will refine temporal correlation worldwide. For example, recent deep-sea core studies dated by magnetostratigraphy and biostratigraphy have documented high-resolution biotic, ocean temperature and climate records from far-flung ocean basins. By linking these records with high-resolution geochronology of the terrestrial rocks in our study area, we hope to provide a framework for better understanding of greenhouse climate dynamics and related terrestrial events.
70至5500万年前(白垩纪晚期和古新世),地球经历了温室气候并经历了巨大的变化,包括海平面下降、溢流玄武岩大规模喷发(德干地盾)、恐龙灭绝(K-T边界) )、拉拉米德造山运动、哺乳动物的爆炸性辐射,以及被称为古新世-始新世最热期(PETM)的全球快速变暖的重大事件。这一时期的古气候记录为理解温室气候的建立、维持和逃离机制、海洋和陆地环境之间的关系以及当前和未来气候变化的各个方面提供了宝贵的背景。这项研究的目标是基于落基山脉地区几个盆地的一系列陆地岩石序列,为这一关键的 1500 万年间隔开发一个高分辨率的时间框架。落基山脉地区的白垩纪和古新世岩石包含丰富的气候波动记录、世界上最好、采样最多的陆地生物记录(特别是植物和哺乳动物化石),以及适合磁地层学和地质年代学的广泛暴露。我们的方法将整合生物地层学(记录化石生物的地层序列)、磁地层学(测量地球磁场的反转)和地质年代学(利用铀的放射性衰变来确定锆石晶体中铅的年代学)。在某些情况下,我们将直接确定磁极性反转的边界。总之,这些技术将使我们能够评估海洋和湖泊沉积岩中保存的沉积循环是否受到地球轨道动力学以及与太阳系其他行星相互作用的控制。尽管讨论了很多,但这项测试从未针对这个时代的岩石进行过。该项目将导致地质时间尺度的高分辨率增强,从而完善全球时间相关性。例如,最近通过磁地层学和生物地层学进行的深海岩心研究记录了来自遥远海洋盆地的高分辨率生物、海洋温度和气候记录。通过将这些记录与我们研究区域陆地岩石的高分辨率地质年代学联系起来,我们希望为更好地了解温室气候动态和相关陆地事件提供一个框架。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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William Clyde其他文献
William Clyde的其他文献
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{{ truncateString('William Clyde', 18)}}的其他基金
Collaborative Research: Assessing the Sensitivity of High-altitude Environments to Global Increased Temperature as Recorded by Lacustrine Microbialite Carbonates
合作研究:评估湖相微生物碳酸盐记录的高海拔环境对全球气温升高的敏感性
- 批准号:
1826769 - 财政年份:2018
- 资助金额:
$ 10.02万 - 项目类别:
Standard Grant
Collaborative Research: 100 million Years of Biotic and Tectonic Evolution in the Western Branch of the East African Rift System
合作研究:东非裂谷系西支一亿年的生物和构造演化
- 批准号:
1349592 - 财政年份:2014
- 资助金额:
$ 10.02万 - 项目类别:
Continuing Grant
Collaborative Research: Bighorn Basin Coring Project (BBCP) - Targeted Continental Drilling of Paleogene Hyperthermals
合作研究:比格霍恩盆地取心项目(BBCP)——古近纪高温区定向大陆钻探
- 批准号:
0958821 - 财政年份:2010
- 资助金额:
$ 10.02万 - 项目类别:
Continuing Grant
Upgrade of University of New Hampshire Paleomagnetism Laboratory
新罕布什尔大学古地磁实验室升级改造
- 批准号:
0841586 - 财政年份:2009
- 资助金额:
$ 10.02万 - 项目类别:
Standard Grant
The Bighorn Basin Coring Project (BBCP) Phase I: Workshop; Northwest College, Powell, WY; Summer 2007
Bighorn 盆地取心项目 (BBCP) 第一阶段:车间;
- 批准号:
0707415 - 财政年份:2007
- 资助金额:
$ 10.02万 - 项目类别:
Standard Grant
SGER: A Geochronological and Paleoenvironmental Framework for the Nanxiong Basin, Guangdong Province, South China
SGER:中国南方广东省南雄盆地的年代学和古环境框架
- 批准号:
0540835 - 财政年份:2006
- 资助金额:
$ 10.02万 - 项目类别:
Standard Grant
COLLABORATIVE RESEARCH: An Integrated High-Resolution Study of the Effects of Shifting Climate on Late Paleocene-Early Eocene Continential Ecosystems
合作研究:气候变化对古新世晚期-始新世早期大陆生态系统影响的综合高分辨率研究
- 批准号:
0001379 - 财政年份:2001
- 资助金额:
$ 10.02万 - 项目类别:
Standard Grant
Acquisition of Paleomagnetic Equipment for the Department of Earth Sciences, University of New Hampshire
为新罕布什尔大学地球科学系购置古磁设备
- 批准号:
0086672 - 财政年份:2001
- 资助金额:
$ 10.02万 - 项目类别:
Standard Grant
Geochronology and Mammalian Paleobiogeography of the Ghazij Formation, Pakistan: Implications for the Indian-Asian Collision and the Paleocene-Eocene Boundary
巴基斯坦加济杰地层的年代学和哺乳动物古生物地理学:对印度-亚洲碰撞和古新世-始新世边界的影响
- 批准号:
9902905 - 财政年份:1999
- 资助金额:
$ 10.02万 - 项目类别:
Continuing Grant
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