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Rock Magnetic Studies of Soil Chronosequences in California:A New Approach to Soil Genesis and the Dating of Geomorphic Surfaces

加利福尼亚州土壤年代序列的岩石磁学研究：土壤成因和地貌表面测年的新方法

基本信息

批准号：
8803926
负责人：
Kenneth Verosub
金额：
$ 8万
依托单位：
University of California-Davis
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1988
资助国家：
美国
起止时间：
1988-07-01 至 1991-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8803926&HistoricalAwards=false
关键词：
Rock Magnetic Studies Soil Chronosequences

项目摘要

Although soil scientist have been studying the chemistry of iron in soils for many years, there have been relatively few studies of the magnetic properties of soils. Most of the studies have focussed on the enhancement of the magnetic susceptibility in the upper portion of the soil. For the past year and a half, the Principal Investigator has been studying the rock magnetic properties of three soil chronosequences in California, noting that the rock magnetic properties vary within different horizons of the same soil profile or pedon and between pedons of different age developed in the same parent material. Results have also shown that the enhancement of the magnetic susceptibility is a more complex phenomenon than previously thought. This project investigates other chronosequences in California and extends work to include additional rock magnetic parameters. The goal of this research will be to gain new insights into the basic pedogenic processes involved in the translocation and transformation of iron in soils and to use that information to develop a relative, if not an absolute, method of dating soils. Such a dating technique would have wide applicability, not only for the dating of soils on stable geomorphic surfaces but also for the dating of various surficial processes such as hillslope development and landsliding.

尽管土壤科学家一直在研究多年来，土壤中的铁含量相对较少，研究土壤的磁性。大多数研究一直专注于提高磁化率，土壤的上部。在过去的一年半里，首席研究员一直在研究加州三个土壤时序的性质，注意到不同层位的岩石磁性不同同一土壤剖面或土壤层之间以及不同土壤剖面或土壤层之间年龄在同一母体材料中发展。结果也表明，磁化率的增强是一个比以前想象的更复杂的现象。这个项目调查加州的其他时间序列，以包括额外的岩石磁性参数。这个目标研究将是获得新的见解的基本成壤参与铁的移位和转化的过程并利用这些信息来制定一个相对的，如果没有一种测定土壤年代的绝对方法这样的约会技巧将具有广泛的适用性，不仅适用于土壤的年代测定，稳定的地貌表面，而且还用于各种山坡发育和滑坡等地表过程。