Magnetic Susceptibility Variations in Cave Sediments from the Moravian Karst, Czech Republic: A Record of Environmental Change
捷克共和国摩拉维亚喀斯特洞穴沉积物的磁化率变化:环境变化的记录
基本信息
- 批准号:9705718
- 负责人:
- 金额:$ 7.19万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1997
- 资助国家:美国
- 起止时间:1997-06-15 至 2000-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
97-05718 Diehl Variations in mineral magnetic properties of iron from marine, lake, and wind blown (loess) deposits have been shown to reflect changes in Earth's orbit, climate, and human activity. Cave sediments have gone almost unnoticed in these environmental magnetic studies and, in many instances, these sediments contain a rich history of early man. The Czech Geological Survey and Michigan Technological University have been studying the cave deposits of the Moravian Karst over the last several years to reconstruct the Pleistocene/Holocene paleoclimate record in which these sediments were deposited. This proposed research concentrates on discovering the nature of environmental and/or anthropogenic processes that may be causing variations in magnetic susceptibility and other mileral magnetic parameters in two sequences of cave sediments. The first sequence is from the floodwater deposits of Spiralka Cave where the magnetic susceptibility variations recorded in the upper part of this section appear to track the 10-year averaged winter temperature anomalies determined from direct temperature measurements (over the last 200 years) at the Prague-Klementinum Observatory. The second sequence consists of loess deposits from the entrance facies of Kulna Cave, a well-studied archeological site. Preliminary work indicates magnetic susceptibility highs are perhaps controlled by increased erosion of a pedogenic source material during cold intervals rather than by in-situ pedogenic enhancement during warm intervals. This work also has important implications for tying the cave stratigraphy of Central Europe (and its record of man) to changes in the global ice volume as Kulna Cave is the type locality for cave deposits in Central Europe. ***
来自海洋、湖泊和风吹(黄土)沉积物的铁的矿物磁性的变化已被证明反映了地球轨道、气候和人类活动的变化。在这些环境磁研究中,洞穴沉积物几乎没有被注意到,在许多情况下,这些沉积物包含了早期人类的丰富历史。捷克地质调查局和密歇根理工大学在过去的几年里一直在研究摩拉维亚喀斯特的洞穴沉积物,以重建这些沉积物沉积的更新世/全新世古气候记录。本研究的重点是发现环境和/或人为过程的性质,这些过程可能导致两个洞穴沉积物序列的磁化率和其他矿物学参数的变化。第一个序列来自Spiralka洞穴的洪水沉积物,该部分上部记录的磁化率变化似乎跟踪了布拉格-克莱门特纳天文台(布拉格-克莱门特纳天文台)直接温度测量(过去200年)确定的10年平均冬季温度异常。第二层序由库尔纳洞穴入口相的黄土沉积物组成,库尔纳洞穴是一个被充分研究的考古遗址。初步的工作表明,磁化率的高可能是由于在寒冷的时间段里,成土源物质的侵蚀作用增加,而不是由于在温暖的时间段里,原位成土作用增强。这项工作对于将中欧洞穴地层学(及其人类记录)与全球冰量变化联系起来也具有重要意义,因为库尔纳洞穴是中欧洞穴沉积物的典型地点。***
项目成果
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Jimmy Diehl其他文献
Estimation of fault-zone conductance by calibration of a regional groundwater flow model: Desert Hot Springs, California
- DOI:
10.1007/s10040-007-0158-0 - 发表时间:
2007-02-10 - 期刊:
- 影响因子:2.300
- 作者:
Alex Mayer;Wesley May;Chad Lukkarila;Jimmy Diehl - 通讯作者:
Jimmy Diehl
Jimmy Diehl的其他文献
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{{ truncateString('Jimmy Diehl', 18)}}的其他基金
Collaborative Research: Paleomagnetism and Geochronology of the Mono Lake Event [?] Recorded in the Lava Flow Sequence of Santa Maria Volcano, Guatemala
合作研究:危地马拉圣玛丽亚火山熔岩流序列中记录的莫诺湖事件[?]的古地磁学和地质年代学
- 批准号:
0439155 - 财政年份:2005
- 资助金额:
$ 7.19万 - 项目类别:
Standard Grant
Acquisition of a Superconducting Rock Magnetometer and a Field Free Room
购置超导岩石磁力计和无场室
- 批准号:
9810773 - 财政年份:1998
- 资助金额:
$ 7.19万 - 项目类别:
Standard Grant
U.S.-Czech Paleoclimate and Mineral Magnetic Research on Cave Sediments from the Moravian Karst, Czech Republic
美国-捷克对捷克共和国摩拉维亚喀斯特洞穴沉积物的古气候和矿物磁力研究
- 批准号:
9507137 - 财政年份:1995
- 资助金额:
$ 7.19万 - 项目类别:
Standard Grant
Radiometric and Paleomagnetic Constraints on Late QuaternaryHolocene Volcanic Evolution of the Central American Arc in Guatemala
危地马拉中美洲弧晚第四纪全新世火山演化的辐射和古地磁约束
- 批准号:
9017821 - 财政年份:1991
- 资助金额:
$ 7.19万 - 项目类别:
Standard Grant
Collaborative Paleomagnetic Research in Santa Maria Volcano,Guatemala
危地马拉圣玛丽亚火山古地磁合作研究
- 批准号:
8915827 - 财政年份:1990
- 资助金额:
$ 7.19万 - 项目类别:
Standard Grant
Collaborative Research: Paleomagnetic Investigations of Late Cretaceous & Early Tertiary Volcanic Rocks from Montana
合作研究:晚白垩世古地磁研究
- 批准号:
8803521 - 财政年份:1988
- 资助金额:
$ 7.19万 - 项目类别:
Standard Grant
Paleomagnetic Record of the Matuyama-Brunhes Transition fromGlacial Lacustrine (Varved) Sediments: Collaborative Rsch Between the Univ of Wisc-River Falls & MI Technologial U
冰川湖 (Varved) 沉积物的 Matuyama-Brunhes 转变的古地磁记录:Wisc-River Falls 大学之间的 Rsch 合作
- 批准号:
8306393 - 财政年份:1984
- 资助金额:
$ 7.19万 - 项目类别:
Standard Grant
Paleomagnetic Investigation of Mid-Tertiary Rocks From the Mogollon-Datil Volcanic Field, Southwestern New Mexico
新墨西哥州西南部 Mogollon-Datil 火山田中第三纪岩石的古地磁调查
- 批准号:
8121237 - 财政年份:1982
- 资助金额:
$ 7.19万 - 项目类别:
Continuing Grant
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