MAGNETIC TECHNIQUES APPLIED TO THE STUDY OF ROCK VARNISH

被引：5
|
作者：
CLAYTON, JA [1 ]
VEROSUB, KL [1 ]
HARRINGTON, CD [1 ]
机构：
[1] UNIV CALIF LOS ALAMOS SCI LAB,DIV EARTH & ENVIRONM SCI,LOS ALAMOS,NM 87545
来源：
GEOPHYSICAL RESEARCH LETTERS | 1990年 / 17卷 / 06期
关键词：
D O I：
10.1029/GL017i006p00787
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
We report the successful application of magnetic techniques to the study of rock varnish, a surficial coating that forms on rocks in arid environments. Using thin wafers of varnished and unvarnished greywacke sandstone, we have detected a stable remanent magnetization that can be unambiguously attributed to the rock varnish. We have also measured several rock magnetic properties of the rock varnish and have shown that the primary magnetic carrier is either magnetite or maghemite. Our results demonstrate the feasibility of applying magnetic techniques to the study of geomorphic surfaces. Subsequent rock magnetic and paleomagnetic studies of rock varnish should provide new information about the geochemical processes involved in the formation of rock varnish and about the validity of a new chronological technique known as rock varnish dating. Copyright 1990 by the American Geophysical Union.
引用
收藏
页码：787 / 790
页数：4
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